CN110410204A

CN110410204A - A kind of high-power brush cutter of low-noise energy-saving

Info

Publication number: CN110410204A
Application number: CN201910637992.1A
Authority: CN
Inventors: 叶晓波; 其他发明人请求不公开姓名
Original assignee: Ningbo Daye Garden Equipment Co Ltd
Current assignee: Ningbo Daye Garden Equipment Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2019-11-05

Abstract

A kind of high-power brush cutter of low-noise energy-saving, containing the cutter with laser head and disc cutterbar dual-purpose；The brush cutter is using a kind of engine with function hush tube and variable cross-section air hose and the two-stroke alcohol fuel for reequiping G pad；Tubule, fish scale wedge (54e), variable cross-section air hose (54f) noise reduction of exhaust outlet connection catalyst hush tube (69) of cylinder and function hush tube (54d), auxiliary hush tube (54g)；The function hush tube (54d) is the series winding at interval, and is axis along the curve of the range of decrease of the approximate similar odd function with reference to multiple limited sinusoidal wave trains that one third octave is the period；In the entrance of the piston pin end of engine piston, should not the chamfering (d18) of common pin hole be mounted directly two G type elastic cushions.Filtering wet fog bottle discharge from the nearly tool bore (28a) that the blowout noise abatement of the nozzle of diminution passes through aluminum pipe of the brush cutter more than one meter again；The chamfering (d18) of pin hole on engine piston drawing is removed and is mounted directly two G type elastic cushions；The angle of the oblique angle of the c-type circle of crankshaft and every side crankshaft is at 23.5 degree.

Description

A kind of high-power brush cutter of low-noise energy-saving

Technical field

The present invention provides one kind and cuts off shrub for the places such as beside flower bed, garden, park and road, and flowers and trees shaping is cut Filling machine band grass-mowing machine, belongs to gardens machine field.With the innovative approach by being discharged indirectly after one meter five of catalase hush tube, to expand Purposes on brush cutter installs band additional and cuts pile and beats the grass four bifurcated of the moving head of wire and the disc cutterbar with inside and outside sawtooth and controlization device Nozzle, and convenient for the long grass pressing wheel of pressure grass soil moisture conservation and meadow decorative pattern, to form low emission LPG brush cutter.There is the burning of function wave Room and with the collocation that has the internal combustion engine ignition device of active receiving electrode and fine motion discharge electrode, have and add double auxiliary skirt rims in piston skirt It reduces hydrocarbon emission and piston skirt logarithmic differentiation isogonal line skirt turbulent flow returns and alters drop row, there is narrowed left and right block Double auxiliary blow vents reduce a variety of methods of discharge, the two-stroke LPG engine that the cooling of equal pressure angle logatithmic spiral runner bilayer is eliminated the noise It is the engine of low emission, is the crystallization that the present inventor's lifetime domestic and foreign experience is groped；Known two rush petrol engine discharge hardly possible It is up to standard, it is existing can be up to standard, had determined that in the application that two rush gasoline engine scavenging road junction and start batch to produce a kind of further improved hair Motivation implies a kind of 20 years from now on new technical fields of the low emission of the high-power brush cutter of low-noise energy-saving.

Background technique

Brush cutter is widely used in the places such as flower bed, garden, park and road side and cuts the grass on a lawn, tending ot young growth, tea Garden updates, and herbage harvesting is returned crop stocks to the field, flowers and trees shaping etc. cuts off the operation of shrub branch；It is selected by the hobby of people Mode carrys out brush.Some operation pedestrians like and when habit brush cutter, when especially encountering corner place, use energetically Press mobile jib, do mobile jib often position and does not live and micro wave calmly.The height for operating pedestrian is different, and habit takes work The difference for making angle, needs mobile jib adjustable length, and the round type linkage of original positioning mobile jib, causes mobile jib micro there are easy The shortcoming rocked.The low vibration and low noise of low vibration grass-mowing machine, if considering to have in the foamed plastics of stock plus-minus vibration Certain curative effect；And the very big root of vibration and noise is not only in the precision and geometric tolerance of power and tool, and is mechanism, The harmony of catalyst, hush tube, vibration-damped handle, cutter and engine cooperates, and low vibration and the low emission for pursuing grass-mowing machine are true On be the hard nut to crack left for a long time.Power per liter can be improved relative to four-stroke engine using two stroke engine 50% or more, but be that true hardly possible is up to standard in discharge, this is a part of project of the invention；Grass-mowing machine is portable dam, it is desirable to Power is light and small；No matter two-stroke or four-stroke gasoline engine will igniter, engine spark plug is widely used in arteries and veins Current voltage of leaping high is introduced into combustion chamber, makes the gaseous mixture sparking of inspiration cylinder and lights, and then diffusion combustion and breaks out work done. Between the external connector of existing spark plug and the spark cap for having rubber jar, has sometimes and loosely dissipate scattered phenomenon.Existing fire The inside of Hua Sai, though being equipped with glass-sealing agent makees resistance, only impedance；If adding induction reactance and capacitive reactance, forms suitable RCL and return Road, there will be the effects for more preferably inhibiting radio interference.Multiple tracks umbrella rib on insulator can also be improved by semi-circular cross-section For saw-tooth shaped cross section, climbs electric channel more to insulate and preferably block rubber jar.The metal shell of existing spark plug Heat dissipation also can further improve.The electrode of existing spark plug, as one can imagine, there are easy coking, easy ablation, single-point arcing, low temperature The shortcomings that difficult point；If electrode innovation be it is movable, when there is improvement.It is but not perfect moreover there are many original combustion chambers Ten beauty；In addition to crossing advantage, there is shortcoming；Such as wedge-section combustion chamber, gaseous mixture undue concentration at spark plug, operating condition Seem rough；For another example bathtub shaped combustion chamber, the shape of prolate, making squish, the effect is relatively poor, flame travel Longer, burn rate is relatively low, and burning time is long, and rate of explosion is low, and surface to volume ratio F/V is larger, is unfavorable to HC discharge. For another example bowl-in-piston chamber, hemispherical combustion chamber, fluffy shape combustion chamber and other types combustion chamber such as generate the auxiliary combustion of turbulent flow Room, dual ignition plug combustion chamber, the combustion chamber of plane is each has something to recommend him；But the invention that the mankind aspire after perfection is endless, piston Also there are very big potentiality that can dig.The so-called best geometry of combustion chamber and piston is no doubt important, but to be adapted to engine model And arrange in pairs or groups with igniter, just there is preferable effect.Especially fuel economy of the two-stroke gasoline engine than four-stroke gasoline engine It is worse, the hydrocarbon emission Chang Chaobiao in tail gas.Combustion chambers of internal combustion engines and piston and collocation with igniter, are one It is related to the hard nut to crack of energy-saving and emission-reduction.It contributes if with four-stroke engine less；Volume is big if with booster；If using bavin Then easy soiled is personal for oil turbine；By the exhaust gas of the engine direct emission by person of modern times, hover in engine environment, portion It can be sucked by engine air filter and carburetor air mouth, and portion can be sucked by people.Brush cutter can only brush and cannot It beats the grass；It can dual-use if installing moving head additional on cutter head；The meadow just beaten, some grass have the phenomenon for being pulled out pine, if With grass pressing wheel, not only there is the soil moisture conservation of pressure grass and extrude the effect of meadow decorative pattern, and makes smooth operation and laborsaving；Common flat sword Bush knife encounters stiff wood bar and just allows knife phenomenon sometimes, if with band part sawtooth since the effect of sliding cutting is more than the effect of impact cutting Knife can improve；It is long to cut pile wire service life of beating the grass；If can be advanced optimized with the improvement of four bifurcated nozzle of carburetor into vapour； It is a kind of noise reduction and the engine for reequiping G pad low emission level engine improvement, easily makes brush cutter and grass-mowing machine up to standard.

Summary of the invention

In order to make up shortcoming caused by the existing mechanism of grass-mowing machine, keep mobile jib positioning reliable and it is not micro wave, make brush The low vibration and low noise of machine are improved, and power output and cutting effect are improved, and lower discharge, and the present inventor has done many brush The improvement of machine grass-mowing machine, with containing the single-cylinder air-cooled petrol engine of small two-stroke for improving more scavenging ports, such as E134F is former long Bar is changed to the hush tube of more honeycombs and catalyst, there is transparent shield, has the bush knife of periphery blade and inner circumferential blade, there is side The steady stock interface of flange and lateral filament button, there is the hand handle of spiral spring or wave spring and vibration damping, there is inside spin whirlpool nozzle Carburetor, formed it is novel there is catalase hush tube and swirl sprayer and two to rush the brush cutter of more scavenging port gasoline engines, be a kind of Low-emission gasoline brush cutter.Brush cutter can only brush and cannot beat the grass；It can dual-use if installing moving head additional on cutter head； The meadow just beaten, some grass have the phenomenon for being pulled out pine, if not only having the soil moisture conservation of pressure grass with grass pressing wheel and extruding the effect of meadow decorative pattern Fruit, and make smooth operation and laborsaving；The bush knife of common flat sword is encountered since the effect of sliding cutting is more than the effect of impact cutting Stiff wood bar just allows knife phenomenon sometimes, if can be improved with the knife of band part sawtooth；It is long to cut pile wire service life of beating the grass；If with changing The improvement of oily four bifurcated nozzle of device can be advanced optimized into vapour；And known two to rush petrol engine discharge difficult up to standard, finds use on Piston skirt, which adds double auxiliary skirt rims and returns in scavenging road junction inclined wedge turbulent flow, alters the low emission two of piece and rushes petrol engine, when can be into one Step improves and keeps brush cutter and grass-mowing machine up to standard.Therefore to expand purposes, on the basis of Low-emission gasoline brush cutter, installation is beaten the grass Head, grass pressing wheel, band serrated knife cut pile and beat the grass the improvement of four bifurcated nozzle of wire and carburetor, form Low-emission gasoline and cut Filling machine.The engine of low emission, be the improvement of internal combustion engine the combustion chamber for having function wave and with have active receiving electrode and fine motion On the basis of the collocation of the internal combustion engine ignition device of discharge electrode, and adds double auxiliary skirt rims to reduce hydrocarbon in piston skirt and arrange On the basis of the petrol engine put, and the vapour for altering drop row is returned in improved piston skirt logarithmic differentiation isogonal line skirt turbulent flow On the basis of oil turbine, double auxiliary blow vents of further improved narrowed left and right block reduce the two of discharge and rush petrol engine, Belong to the combustion chamber of internal combustion engine and the technical field of turbulent scavenging.In piston skirt plus double auxiliary skirt rims and in scavenging road junction inclined wedge Petrol engine is rushed in the low emission two that turbulent flow time alters piece, is the crystallization for collecting many years domestic and foreign experience and groping；Its usefulness is to take Unexpected emission reduction effect up to standard was obtained, and brush grass-mowing machine is dual-purpose.

Silkworm in spring not to the utmost, improves invention and has no limits to dead silk；It wears out iron shoes and on a rare occasion obtains, clino-diagonal is warded off in energy-saving and emission-reduction.Everybody knows Two rush machine discharge Chang Chaobiao, but nobody can thoroughly solve；The scavenging road junction inclined wedge turbulent flow returns and alters piece, is sweeping in two qi of chong channel ascending adversely cylinders Gas port adds small pieces, seems simple, but nobody can find out；It is one small to be who fails to give attention to go to burn-on at the scavenging road junction of cylinder Piece, which is loaded on, starts the engine and contacts with high speed piston, but the sudden caprice for often having an examination in arms just has amazing effect, What this, this is not invented exactly this be both after travelling far and wide in search of it, thousand consider and it is even have one, and be for many years to grope and state The crystallization of inside and outside experience has received emission reduction effect up to standard really.Moreover the carburetor of engine has the potential to be tapped very much, if four points Fork nozzle refers to that on the outlet of the nozzle of the inside of carburetor be four bifurcated nozzles along 4 gaps are set ring week, therefore improves Mixing combustion fluid state of the vapour through gap and be conducive to atomization.Although spark-ignition process and two rushing detailed physical and chemical processes very Complexity, the mankind are still not clear there are many aspect so far, but we perhaps can be initially believed that, this scavenging road junction inclined wedge turbulent flow It returns and alters piece, generate turbulent flow with inclined wedge at scavenging road junction, returning a possibility that channeling to gas handling system to exhaust gases after combustion has retardance Effect, doubtful to belong to turbulent ventilation, well known cross flow scavenging, loop scavenging and uniflow scavenging three for two-stroke internal combustion engine For kind ventilation scheme, open an energy emission reduction alters the approach of piece in scavenging road junction inclined wedge turbulent flow time, referred to as turbulent The clino-diagonal of scavenging or the shortcut of low emission.Although the mechanism of its atom level needs the following exploration, it rushes gasoline engine scavenging two The application at road junction has determined that and starts batch production, represents the developing direction of 20 years Low-emission gasoline brush cutters from now on.Pile is cut to beat Careless wire is more durable than nylon wire mostly, is not only conducive to long-acting cutting, few with line, saves into disk nylon wire；And can beat the grass, also Straw can be cut and nylon wire cuts motionless thin bar；Beat the grass wire when cutting different objects and disc cutterbar complement each other it is each has something to recommend him. And the long diameter of beating the grass that is equal to of its roller of long grass pressing wheel then can just be pressed onto the grass just cut, to press careless effect obvious.With thin Long grass pressing wheel, in order to press careless soil moisture conservation, material-saving rolls covering face height, and meadow embossing is beautiful.

The filtering scavenging gasoline brush cutter is low using the two-cycle gasoline engine for adding strainer in scavenging channel The engine of discharge, be near piston top dead center, in cylinder before the ignition of mixed gas of compressed piston upper, by Moved up in piston train of dress portion and open the preparation air entry in latch-release cylinder, in the crankcase below piston suck fuel and The gaseous mixture of air；The pressure of the burning gases of the piston upper generated again due to igniting, piston is from top dead-centre to bottom dead centre side To movement and air entry is simultaneously closed off, the gaseous mixture in compression crankcase is vented in the piston upper of bottom dead center-nearby from opening and closing While the burning gases in cylinder are discharged to outdoor gas in mouth, the scavenging access being connected by crankcase with cylinder, In Gaseous mixture is imported into the two cycle engine in cylinder from crankcase by preparation scavenging port in piston upper latch-release cylinder；The design There is the valve gear with crankshaft-synchronous, this valve is from crankcase to cylinder scavenging mouth, and the crankcase side of scavenging access configures At normally closed；When the valve-closing of the crankcase side of scavenging access, gaseous mixture in scavenging access by combustion gas fire Flame is allowed to burning of igniting, and after HC reduction again from crankcase to scavenging port, the crankcase side of scavenging access is allowed to be open, and is sweeping While the burning of gas access is sent out with gaseous mixture, the gaseous mixture in crankcase closes exhaust before being discharged from exhaust outlet Mouthful, here it is the two cycle engines for substantially reducing the discharge of HC；Strainer (58) in the scavenging channel is located at technique Beside butt strip (55), or it is located under scavenging channel；The strainer in the scavenging channel be by a plurality of wire through knitting device and At to breathing has filtering regulating and controlling effect between gas and crankcase in cylinder；It is equipped with multiple wedges (11b) that noise control strainer is equipped with, institute Stating wedge is multiple hollow six prismatics, has aperture, the advanced wedge compression of air-flow on top, then escape and expand from wedge aperture, has and disappear Sound effect；Be equipped with catalyst volume (59) again, platiniferous rhodium indium iridium has a catalyst effect to gas is flowed through, it is ingenious slow down pneumatic noise and The discharge of HC.

A kind of high-power brush cutter of low-noise energy-saving, containing stock, the cutter with laser head and disc cutterbar dual-purpose, manipulation hand Assembly, the stock contains aluminum pipe, is equipped with transmission shaft, the aluminum pipe and transmission in the cavity being equipped with inside the aluminum pipe Axis the upper end is equipped with engine, that is, engine, and the aluminum pipe and its lower end of transmission shaft are installed with the cutter, the aluminum pipe Middle part is installed with hand handle；The brush cutter its contain the two-cycle gasoline engine, that is, engine (1), hexagon socket cap head screw M6x30 (2), hexagon socket cap head screw M5x8 (3), 31 type hex nut M6 (4), PP wire clamp (5), PA hanging ring (6), 41 Type non-metallic insert hexagonal locking nut M5 (7), it POM hanging ring fixing seat (8), hexagon socket cap head screw M5x20 (9), preceding connects Aluminum pipe (10), manipulating handgrip assembly (11), control handle pipe (12), 13 band spring washer hexagon socket cap head screw M5x25 (13), hand handle fixing seat upper clamp plate (14), hand handle fixing seat (15), left handgrip component (16), nitrile rubber hand handle shock-absorbing sleeve (17), hand handle fixing seat lower clamp plate (18), left handgrip pipe (19), five leaf nylon tubes(20), transmission shaft (21), deep groove ball bearing III (22), spring washer 6 (23), hexagon socket cap head screw M6x23 (24), aluminium tube joint (25), locking Knob (26), shaft adapter (27), rear aluminum pipe(28), 4 hexagon socket cap head screw M5x12 (29), 4 Spring washer 5 (30), limit handle spring (31), limit handle lock (32), limit handle (33), split washer 2.5 (34), Shield fixing seat (35), circlip for hole 26 (36), circlip for shaft 10 (37), roundlet gear with curved teeth (38), small arc-shaped Gear oil blocks up (39), hexagon socket cap head screw M6x14 (40), hexagon socket cap head screw M6x10 (41), plain washer 6 (42), gear-box (43), great circle gear with curved teeth (44), splined shaft (45), deep groove ball bearing 6002I (46), circlip for hole 32 (47), gear-box shield (48), spline pad (49), disc cutterbar are containing 3 tooth disc cutterbars (50) or 2 tooth disc cutterbars (63) or 4 tooth cutteves Disk (64) or 8 tooth disc cutterbars (65), cutterhead pressing plate (51), cutterhead shield (52), 1 type hex nut M10 left-handed (53) or nylon Moving head (54), harness (55), hexagon nut with flange M5 (56), small blade (57), knife rest (58), cross recess coiled hair self tapping Screw ST4x14 (59), shield A (60), shielding support (61), hexagon socket cap head screw M5x35 (62), left handgrip (16-1), 1 type hex-head nut M5 (16-2), Cross Recess Head Screw M5x20 (16-3), Cross Recess Head Screw M5x30 (16-4), the waistband (66) for having pallet (67), auxiliary turn ball (68), catalyst hush tube (69)；The gasoline engine (1) is used Single cylinder and air-cooled, assembly containing starter (F1), starting driver plate component (F2), 2 oil sealings (F3), right case (F4), 2 zanjons Hexagonal cylindrical head plain cushion screw assemblies M5 × 45 (F6), hush tube containing catalyst (69) in ball bearing II (F5), 2 torque 7-9NM Muffler ASSY (F7), silencer pad (F8), the right shock-reducing sleeve of fuel tank (F9), 2 retaining ring for piston pins (F10), piston pins (F11), needle bearing (F12), piston (F13), piston ring (F14), crank assemblby (F15), woodruff key (F16), cylinder block pad (F17), cylinder block (F18), 2 interior hexagonal cylindrical head screw assemblies M5 × 20 (F19), engine enclosures (F20), coiled hair self tapping Screw ST5 × 14 (F21), igniter assembly (F22), 2 crosses fluting screw assemblies M4 × 20 (F23), spark plug (F24), No asbestos packing sheet mould assembling pad (F25), 2 mould assembling positioning pins (F26), left box body (F27), 5 crosses fluting screw assemblies M5 × 25 (F28), magnetic flywheel (F29), clutch assembly (F30), clutch disk (F31), circlip for shaft (F32), fuel tank are left The right shock-absorbing sleeve R (F34) of shock-absorbing sleeve L (F33), fuel tank, inserts bearing connection seat (F35), 3 crosses fluting screw assemblies M5 × 20 (F36), upper clamp plate shock-absorbing sleeve (F37), lower clamp plate shock-absorbing sleeve (F38), upper clamp plate (F39), lower clamp plate (F40), 2 interior hexagonals Socket cap screw assemblies M5 × 18 (F41), flame-out wire clamp (F42), air filter seat (F43), 2 air filter seat pad sets (F44), Soft polyurethane foam filter core (F45), air filter pressing plate (F46), 2 M5 spring washers (F47), 2 crosses fluting coiled hair bullet screws M5 × 63 (F48), cross fluting coiled hair screw assemblies M5 × 14 (F50), 2 air inlet pipe pads (F51), are led at air filter lid (F49) Flowing plate (F52), polyphenylene sulfide PPS air inlet pipe (F53), grounding wire component (F54), without asbestos packing sheet carburetor packing (F55), carburetion Device assembly (F56), PU yellow transparent oil return pipe (F57), PU black oil inlet pipe (F58), oil-resistant acrylonitrile-butadirubber rubber oil pipe seat (F59), Fuel filter assembly (F60), oil pipe clip (F61), HDPE are blow molded fuel tank (F62), cap assembly of fuel tank (F63), 5-7NM hexagonal Hook bolt plain cushion combines M6X14 (F64), 4 3-5NM cross flutings screw assemblies M5X18 (F65), its institute of the brush cutter The two-cycle gasoline engine for including passes through hexagon socket cap head screw M6x30 (2), the hexagon socket cap head screw M5x8 (3) and 31 type hex nut M6 (4), with it is described before connect aluminum pipe (10) and be connected；The pipe of aluminum pipe (10) is connect before described Outside, it is solid by the PP wire clamp (5), PA hanging ring (6), 41 type non-metallic insert hexagonal locking nut M5 (7), POM hanging ring Reservation (8), hexagon socket cap head screw M5x20 (9) simultaneously form harness portion with harness (55), so that harness is worn at single shoulder On；It is connect on aluminum pipe (10) before described, is installed with manipulating handgrip assembly (11), be by control handle pipe (12), more band bullets Pad hexagon socket cap head screw M5x25 (13), hand handle fixing seat upper clamp plate (14), hand handle fixing seat (15), left handgrip component (16), nitrile rubber hand handle shock-absorbing sleeve (17), hand handle fixing seat lower clamp plate (18), left handgrip pipe (19) are collectively constituted；In The inside that the pipe of aluminum pipe (10) is connect before described is installed with the five leaf nylon tubes(20), transmission shaft(21) and deep groove ball bearing III (22) is to be driven；Aluminum pipe (10) are connect before described passes through the spring washer 6 (23), hexagon socket cap head screw M6x23 (24), aluminium tube joint (25), locking knob (26), shaft adapter (27) and institute Rear aluminum pipe (28) connection stated, and pass through 4 hexagon socket cap head screw M5x12 (29), 4 spring washers 5 (30), limit Handle spring (31), limit handle lock (32), limit handle (33), split washer 2.5 (34) and form limit Handleset；In The end of the rear aluminum pipe (28) is installed with the shield fixing seat (35), circlip for hole 26 (36), axis and uses Circlip 10 (37), roundlet gear with curved teeth (38), small arc-shaped gear oil block up hexagonal cylindrical head spiral shell in (39) and more band spring washers Follow closely M5x25 (13), hexagon socket cap head screw M6x14 (40), hexagon socket cap head screw M6x10 (41), plain washer 6 (42), And gear-box (43), great circle gear with curved teeth (44), splined shaft (45), deep groove ball bearing 6002 (46), circlip for hole 32 (47), Gear-box shield (48), spline pad (49), 3 tooth disc cutterbars (50), cutterhead pressing plate (51), cutterhead shield (52)；The cutting Device contains shield and moving head and disc cutterbar to select；It is left-handed (53) with the 1 type hex nut M10 to fill cutterhead； Or dress nylon moving head (54) to be to replace disc cutterbar, and cutting is beaten the grass the small blade (57) of line, passes through hexagonal method Blue face nut M5 (56), knife rest (58), cross recessed pan head tapping screw ST4x14 (59) are mounted on the shield A (60), And shielding support (61) and hexagon socket cap head screw M5x35 (62) to be installed；Cutterhead can multiselect or 2 tooth disc cutterbars (63), Or 4 tooth disc cutterbar (64) or 8 tooth disc cutterbars (65), to select the shrub for cutting different cultivars；The left handgrip component (16), By left handgrip (16-1), 1 type hex-head nut M5 (16-2), Cross Recess Head Screw M5x20 (16-3), cross recess coiled hair spiral shell Nail M5x30 (16-4) is formed, and is mounted on left handgrip pipe (19)；And have the waistband (66) of pallet (67), people's waist can be tied up to, Pallet (67) and auxiliary turn ball (68) movable contact, and auxiliary turns ball (68) and connect with engine enclosure (F20), further to add Long cut coverage；Catalyst hush tube (69) connects the gas outlet of muffler ASSY (F7), so that exhaust gas is attached from cutter through aluminum pipe Nearly discharge；The engine start part of the two-stroke LPG engine includes starter assembly (F1), starting driver plate component (F2), it are furnished with 2 oil sealings (F3) and 2 deep groove ball bearing II (F5), to be rotationally mounted in the right case of engine (F4) on；By hexagonal cylindrical head plain cushion screw assemblies M5 × 45 (F6) in 2 torque 7-9NM, hush tube containing catalyst (69) Muffler ASSY (F7) and silencer pad (F8), are fixed on cylinder block (F18)；It is right equipped with fuel tank on cylinder block (F18) Shock-reducing sleeve (F9)；2 retaining ring for piston pins (F10), piston pin (F11), needle bearing (F12), work are provided in cylinder block (F18) (F13), piston ring (F14) and crank assemblby (F15) are filled in, sets woodruff key (F16) on crankshaft；Cylinder block pad (F17) is mounted on vapour On cylinder body (F18)；2 interior hexagonal cylindrical head screw assemblies M5 × 20 (F19) and recessed pan head tapping screw ST5 × 14 (F21) are hair Motivation outer cover (F20) is fixed on cylinder block (F18)；Igniter assembly (F22) passes through 2 crosses fluting screw assemblies M4 × 20 (F23) fixed；Spark plug (F24) is also on cylinder block (F18)；No asbestos packing sheet mould assembling pad is put on cylinder block (F18) (F25), 2 mould assembling positioning pins (F26), and it is fixed left box body (F27) with 5 cross flutings screw assemblies M5 × 25 (F28)；Magnetic Flywheel (F29) matches on crankshaft, and with clutch assembly (F30), clutch disk (F31) and circlip for shaft (F32) It closes；The left shock-absorbing sleeve L (F33) of fuel tank and the right shock-absorbing sleeve R (F34) of fuel tank are on the outer cover (20)；Inserts bearing connection seat (F35) it is fixed by 3 cross flutings screw assemblies M5 × 20 (F36)；Upper clamp plate is housed on the connection seat (F35) Shock-absorbing sleeve (F37), lower clamp plate shock-absorbing sleeve (F38) and upper clamp plate (F39) lower clamp plate (F40) and with 2 interior hexagonal cylindrical heads Screw assemblies M5 × 18 (F41) clamp；Flame-out wire clamp (F42) is also equipped on the connection seat (F35)；Air filter seat (F43), 2 air filter seat pad sets (F44), soft polyurethane foam filter core (F45), air filter pressing plate (F46) pass through 2 M5 Spring washer (F47) and 2 cross flutings coiled hair bullet screw M5 × 63 (F48) air filter lid (F49), cross fluting coiled hair screw assemblies M5 × 14 (F50) form air filter, and are packed on carburetor；2 air inlet pipe pads (F51), deflector (F52), polyphenylene sulfide PPS Air inlet pipe (F53), grounding wire component (F54) form carburetion without asbestos packing sheet carburetor packing (F55), carburetor assembly (F56) Device；PU yellow transparent oil return pipe (F57), PU black oil inlet pipe (F58), oil-resistant acrylonitrile-butadirubber rubber oil pipe seat (F59), fuel filter Component (F60), oil pipe clip (F61), HDPE blow molding fuel tank (F62), cap assembly of fuel tank (F63) form fuel tank；And 5-7NM turret head It is the fixed starting driver plate component (F2) that bolt plain cushion, which combines M6X14 (F64), as 4 3-5NM cross fluting groups Closing screw M5X18 (F65) is that the fixed starter assembly (F1) is used；On the waistband (66) for having pallet (67) Equipped with pallet (67), auxiliary can be placed on pallet (67) and is turned ball (68), and assist turning ball (68) mounted in external engine, or Brush cutter engine is directly placed on the pallet (67) that waistband (66) is equipped with to come up operation；Pallet (67) and auxiliary turn ball (68) movable contact, auxiliary turns ball (68) and connect with engine enclosure (F20), further to lengthen cut coverage；Catalyst disappears Sound pipe (69), one end connect the gas outlet of muffler ASSY (F7), aluminum pipe are connect before another termination, so that exhaust gas is after described Aluminum pipe, and be discharged near cutter；The catalyst hush tube (69) is aluminum, has exhaust gas by there is aluminium dioxide catalyst Effect；The muffler ASSY (F7) is aluminum, has exhaust gas by just there is aluminium dioxide catalyst effect；Aluminium is connect before described Pipe (10) and rear aluminum pipe (28) be it is separated, have exhaust gas by there is aluminium dioxide catalyst effect；In the rear aluminum pipe Five leaf nylon tubes set foam honeycomb body, and add catalyst catalyst in foam honeycomb body, have catalyst polynary when to there is exhaust gas to pass through Catalytic effect；The 2 tooth disc cutterbars (63), 4 tooth disc cutterbars (64), 8 tooth disc cutterbars (65) are commonly referred to as cutter for selecting Disc cutterbar is equipped with multiple outer cutting edges (641) in cutterhead periphery, so that brush allows knife less；The 2 tooth disc cutterbars (63), 4 teeth Disc cutterbar (64), 8 tooth disc cutterbars (65) are equipped with multiple inner cutter holes (642) in cutterhead periphery, so as to card branch in brush not；In In the carburetor assembly (F56), the interior straight tube (70) for improving atomizer is the vortex spray bar for having helicla flute (71), with Conducive to diverging mixed effect；In the carburetor assembly (F56), improves the interior straight tube (70) of atomizer or have helicla flute (71) import of vortex spray bar is the loudspeaker for having parabolical horn mouth (72) or conical section such as archimedes curve Mouth, in favor of polymerizeing contaminated product effect；On the left handgrip pipe (19), the damping adapter tube equipped with close circle helical spring shape (19b), so as to further damping；Using there is transparent or partially transparent shield (60), with the more convenient observation brush of benefit Operation；The two-stroke that the single-cylinder air-cooled equal pressure angle logatithmic spiral runner bilayer cooling of the small two-stroke that this brush cutter uses is eliminated the noise LPG engine belongs to the engine of low emission, be the improvement of internal combustion engine the combustion chamber for having function wave and with have active receiving electrode On the basis of collocation with the internal combustion engine ignition device of fine motion discharge electrode, and piston skirt add double auxiliary skirt rims reduce hydrocarbonization On the basis of the petrol engine for closing object discharge, and is returned in improved piston skirt logarithmic differentiation isogonal line skirt turbulent flow and alter drop On the basis of the petrol engine of row, double auxiliary blow vents of further improved narrowed left and right block reduce the two of discharge and rush gasoline hair Motivation；In piston skirt plus double auxiliary skirt rims, there is the effect that emission reduction is up to standard；Piston skirt logarithmic differentiation isogonal line skirt turbulent flow is returned and is altered The petrol engine of drop row is to be equipped with double auxiliary skirt rims (g37) in the skirt section of piston (g31)；The double auxiliary skirt rims (g37) are On the basis of retaining former two skirt of the bilateral for not having connecting rod pin hole of original piston, and there is company in the skirt section of piston (g31) The bilateral in lever pin hole it is following, an auxiliary skirt is also added on every one side, becomes double auxiliary skirt rims (g37)；The double auxiliary skirt rims, Its containing bottom edge (g38), lower fillet (g39), side (g40), upper fillet (g41), the concave arc side (g42) on bottom edge, piston it is double auxiliary Isogonal one section of the through-hole (g43) of skirt, piston skirt logarithmic differentiation equation is located at skirt, is conducive to auxiliary and leads To additional turbulence, which is returned, alters and drop row and lubrication assistant and heat dissipation；The double auxiliary skirt rims or with aluminium alloy, or use composite material To reduce cylinder prepareding gap；Each auxiliary skirt of the double auxiliary skirt rims (g37) and two skirt of original are along work The extension of the cylindrical body of circumference beyond the Great Wall, and it is along outside piston Thursday etc. that its projection, which is thrown on the face vertical with piston motion direction, Point；Each auxiliary skirt of the double auxiliary skirt rims (g37) is than two skirt of original along the cylindrical body in outside piston week It is extended longer, that is to say, that the bottom edge of former two skirts of bottom edge (g38) ratio of double auxiliary skirt rims is in the cylindrical body extended line along piston Direction on it is farther apart from connecting rod pin hole, i.e., double auxiliary skirt rims are higher, and piston and skirt section are longer, effect be to be conducive to lengthened piston Guiding length and assist being oriented to；The two sides of the double auxiliary skirt rims (g37) are equipped with the side (g40) of double auxiliary skirt rims, connection The bottom edge (g38) of piston (31) and double auxiliary skirt rims；The two sides of the double auxiliary skirt rims (g37), it is piston (31) and double equipped with connecting The angle of the side (g40) of the double auxiliary skirt rims on the bottom edge (g38) of auxiliary skirt, the side (g40) of two sides is greater than 100 degree；It is described Double auxiliary skirt rims (37) two sides be equipped with double auxiliary skirt rims side (g40), be the upper fillet by the side of double auxiliary skirt rims (g41) piston (g31) is connected；The two sides of the double auxiliary skirt rims (g37) are equipped with the side (g40) of double auxiliary skirt rims, are The bottom edge (g38) of double auxiliary skirt rims is connected by the lower fillet (g39) of the side of double auxiliary skirt rims；The double auxiliary skirt rims (g37) concave arc side (g42) is set on bottom edge；The concave arc side (g42) or circular arc or involute or parabola, with Benefit auxiliary drop row；Through-hole (g43) or pit are set in the double auxiliary skirt rims (g37), with sharp lubrication assistant and heat dissipation；Described In double auxiliary skirt rims (g37) and piston is equipped with multiple through-holes (g43), is slightly in up-side down triangle arrangement, there is multiple rows of, most downlink through-hole It is few, it is more more toward uplink through-hole, with sharp lubrication assistant and heat dissipation；Cylinder body (g44) be two rush petrol engine dress piston Along the cylinder body (g44) at the symmetrically scavenging road junction (g45) containing left and right each one on cylinder chamber, in the cylinder body (g44) Symmetrical left and right each one scavenging road junction (g45) on symmetrically each ground in left and right be equipped with inclined wedge turbulent flow return alter piece (g46), utilize The equal feature of the logatithmic spiral tool pressure angle of higher mathematics, so that the inclined wedge turbulent flow time is altered piece has by logarithmic differentiation equation As soon as section of logatithmic spiral, then the mixed air-flow gushed on it is easily steady, is generated at scavenging road junction using equal pressure angle with benefit disorderly Stream is altered to block exhaust gas time to reduce discharge；The inclined wedge turbulent flow time alters piece (g46) and is located at the scavenging road junction (g45) of cylinder body most The side of the outlet of the scavenging air belt close to piston for closing on lower dead center of the bottom of lower section, one section of tool logatithmic spiral；It is described Inclined wedge turbulent flow return alter piece (46) include inclined wedge turbulent flow return alter the scavenging road junction (g47) of piece, inclined wedge turbulent flow returns the logical scavenging for altering piece The inclined wedge (g48) at road junction, inclined wedge turbulent flow return that returning for the logical scavenging road junction for altering piece alters grid (g49), inclined wedge turbulent flow returns and alters the logical of piece and sweep The turbulent shield (g50) of gas port, has one section of logatithmic spiral；The inclined wedge turbulent flow, which returns, alters piece (g46) slightly in inclined wedge-shaped, institute The big end for the inclined wedge-shaped stated be connected to the bottom of the bottom at the scavenging road junction (g45) of cylinder body close on lower dead center close to piston Scavenging air belt outlet side, tool one section of logatithmic spiral；The inclined wedge turbulent flow returns and alters the inclined wedge that piece (g46) is included The scavenging road junction (g47) that turbulent flow time alters piece is located at the inclined wedge turbulent flow and goes back to the top for altering piece (46), that is to say, that disorderly in inclined wedge Flow back to the inclined wedge-shaped for altering piece (g46) small end its have one section of logatithmic spiral；The inclined wedge turbulent flow time alters piece (g46) and is included The inclined wedge turbulent flow return alter piece logical scavenging road junction inclined wedge (g48) be located at inclined wedge turbulent flow return alter piece (g46) inside and With the bottom connection of the bottom at the scavenging road junction (g45) of cylinder body, the inside its have one section of logatithmic spiral；Described is oblique Wedge turbulent flow returns to alter the inclined wedge turbulent flow that piece (g46) is included and return returning for the logical scavenging road junction for altering piece and alters grid (g49) and be located at tiltedly Wedge turbulent flow goes back to the intersection for altering the side of the outlet of the scavenging air belt at scavenging road junction (g45) of piece and cylinder body, tool logatithmic spiral One section；The inclined wedge turbulent flow, which returns to alter the inclined wedge turbulent flow that piece (46) is included and return returning for the logical scavenging road junction for altering piece, alters grid (g49) it is located at inclined wedge turbulent flow to return at the chamfering for the side of the outlet of the scavenging air belt at scavenging road junction (g45) for altering piece and cylinder body, tool One section of logatithmic spiral；The inclined wedge turbulent flow, which returns, alters the logical scavenging that the inclined wedge turbulent flow time that piece (g46) is included alters piece Road junction return alter grid (g49) be located at inclined wedge turbulent flow return alter piece and cylinder body scavenging road junction (g45) scavenging air belt outlet side Rounded corner at, tool one section of logatithmic spiral；The inclined wedge turbulent flow time is altered the upper surface of piece (g46) and is altered equipped with inclined wedge turbulent flow time The turbulent shield (g50) at the logical scavenging road junction of piece, one end alter the scavenging road junction (g45) of piece and cylinder body with being located at inclined wedge turbulent flow and return Be connected at the chamfering of the side intersection of the outlet of scavenging air belt, and its other end and inclined wedge turbulent flow return alter the top of piece that is with The small end that inclined wedge turbulent flow returns the inclined wedge-shaped for altering piece (g46) is connected；And the upper surface of described turbulent shield its also have the one of logatithmic spiral Section；The double auxiliary blow vents for narrowing left and right block reduce the two of discharge and rush petrol engine, containing left block, right block, piston and combustion Burn room, spark plug, gray iron, cylinder barrel, connecting rod, crankcase, lubricating oil pump, lubricating system, fuel system, ignition system, cooling System, the cylinder body (g44) are that left and right is symmetrically contained on two edges on the cylinder chamber of dress piston for rushing petrol engine The cylinder body (44) at each one scavenging road junction (g45), at the scavenging road junction of the symmetrical left and right each one of the cylinder body (g44) (g45) on, respectively symmetrically each ground in left and right is equipped with inclined wedge turbulent flow time and alters piece (g46)；The skirt section of the piston is equipped with double auxiliary Skirt (g37)；The double auxiliary skirt rims (g37) are the bases in two skirt of original for the bilateral for there be not connecting rod pin hole for retaining original piston It is every to add an auxiliary skirt on one side on plinth, and in the following of the bilateral for having connecting rod pin hole in the skirt section of piston (g31), become Double auxiliary skirt rims (g37)；The double auxiliary skirt rims, containing bottom edge (g38), lower fillet (g39), side (g40), upper fillet (g41), The concave arc side (g42) on bottom edge, piston and double auxiliary skirt rims through-hole (g43), its piston skirt logarithmic differentiation side of the piston The logarithm line of journey is also referred to as isogonal one section and is located at skirt, the side of the part of skirt be pressure angle close to equal by logarithmic differentiation One section of the logatithmic spiral of equation keeps the inclined wedge disorderly using the equal feature of the logatithmic spiral tool pressure angle of higher mathematics It flows back to alter the Duan Yili of piece (46) with logatithmic spiral and generate turbulent flow using equal pressure angle at scavenging road junction and blocks exhaust gas It returns and alters to reduce discharge；The double auxiliary skirt rims or with aluminium alloy, or with composite material to reduce cylinder prepareding gap；Use CNC Machining center will first produce tungsten copper electrode, assist molding with the lathe for having three-dimensional rotation head, then produced in batches with die casting machine；Again Machining and plating；The left block and its left block of right block and right block, which are respectively provided with, changes the small double auxiliary blow vents to narrow, It is left double auxiliary blow vents (51b) that double auxiliary blow vents, which are located at left block just, and double auxiliary blow vents are located at right block just For right double auxiliary blow vents (52b), the left block and right block are to assemble Face to face, and the upper surface of with the scavenging air belt of cylinder body Be connected, double auxiliary blow vents (51b) in a left side that two scavenging air belts of the cylinder body are equipped with the left block (g51) respectively and The double auxiliary blow vents (52b) in the right side that the right block (g52) is equipped with are connected, and are double auxiliary ventilations of narrowed left and right block Mouthful, when the double auxiliary skirt rims (g37) that double auxiliary blow vents are equipped with the skirt section for running to plug near piston lower dead center are close When, just it is conducive to narrow local volumetric, increasing local air flow pressure and flow velocity and additional turbulence returns and alters and drop row；The narrowed left side On the scavenging road junction (g45) of the symmetrical left and right each one of the double auxiliary blow vents and cylinder body (g44) of right block respectively symmetrically The inclined wedge turbulent flow that each ground in left and right is equipped with, which returns, alters both pieces (g46) adapted, there is drop row's effect；Pair of the narrowed left and right block Both double auxiliary skirt rims (g37) that the skirt section of auxiliary blow vent and the piston is equipped with adapted has drop row's effect；Described narrows Double auxiliary blow vents of left and right block, and it is each symmetrical on the scavenging road junction (g45) of the symmetrical left and right each one of the cylinder body (g44) The inclined wedge turbulent flow that each ground in ground left and right is equipped with is returned and is altered piece (g46), and the double auxiliary skirt rims being equipped with the skirt section of the piston (g37) three's adapted has more drop row's effect；The left block of double auxiliary blow vents of the narrowed left and right block (g51) the rear wall (51f) of the double auxiliary blow vents (51b) in the left side being equipped with is thicker, and thinnest part is no less than 2mm, and has oblique greater than 10 degree Angle increases intensity so that root is thicker；The left block (g51) of double auxiliary blow vents of the narrowed left and right block is set There are 4 reinforcement arm pawls (51e), and the rectangular section of each reinforcement arm pawl is thicker, thinnest part is also no less than 2mm, more so as to section It is thick and increase intensity；The left side that the left block (g51) of double auxiliary blow vents of the narrowed left and right block is equipped with is double auxiliary logical It is equipped with long reinforcing rib (51c) near the back side of port (51b), to increase intensity to resist caused by narrowing double auxiliary blow vents Bigger local pressure；The left side that the left block (g51) of double auxiliary blow vents of the narrowed left and right block is equipped with is double auxiliary It is equipped with short reinforcing rib (51d) near the back side of the pit of blow vent (51b), to increase intensity to resist and narrow double auxiliary ventilations Bigger local pressure caused by mouthful；The right block (g52) of double auxiliary blow vents of the narrowed left and right block is equipped with The double auxiliary blow vents (52b) in the right side be pit, the double auxiliary ventilations in the left side that the length, width and height of pit are about equipped with the left block (g51) Mouth (51b) is identical, to increase intensity, resists local pressure bigger caused by narrowing double auxiliary blow vents；The narrowed left side The double auxiliary blow vents (52b) in the right side that the right block (g52) of double auxiliary blow vents of right block is equipped with are pit, the length of pit Wide height is identical as a left side double auxiliary blow vent (51b) that the left block (g51) is equipped with, and the length and width on engine are a height of to be not more than 19x7x4.8mm increases local air flow pressure and flow velocity and additional turbulence returns and alters and drop row with convenient narrowed local volumetric；Hair The exhaust gas of motivation not direct emission, but by being discharged indirectly after one meter five of catalyst hush tube from the nearly tool bore (28a) of aluminum pipe； The cutter contain with cut pile beat the grass wire (54b) moving head (54) with the long-acting cutting of benefit, and with inner sawtooth (642) disc cutterbar (64) is to prevent allowing knife；And the carburetor of its engine sets four bifurcated nozzles (70a) with benefit atomization；And The cutter is equipped with the outer protective cover (73) on interior shield (60) and on its outer protective cover equipped with its roller length etc. In the long grass pressing wheel (74) for diameter of beating the grass, in order to press grass soil moisture conservation and meadow decorative pattern；Moving head contained by the cutter (54) pile of cutting being had beats the grass that wire (54b) to be equipped with the way of multiple sharp swords (54a) its multiple sharp swords be in wire On cut what pile went out under hammering with sharp plain chisel, and the wire is round；Moving head contained by the cutter (54) pile of cutting being had beats the grass wire (54b) equipped with multiple sharp swords (54a), the way of multiple point swords or in steel wire With there is the plunger chip die of sharp edge to cut what pile went out under the impact of press machine on line, and the wire is flat；Described cuts The outer cutting edge of the periphery of the knife for 4 stretchings that the disc cutterbar (64) with inner sawtooth (642) contained by cutter is equipped with (641) multiple outer sawtooth (64a) are equipped with, and the inner sawtooth (642) also has 4, and its every inner sawtooth (642) multiple sawtooth are set；The outer protective cover (73) installed on interior shield (60) set by the cutter is equipped with installation Card slot (73b) and 2 screw hole locations (73a) are with benefit installation, and the limit equipped with rope of beating the grass on its outer protective cover (73) (73c), and equipped with the grass pressing wheel mounting bar (73d) and arc for installing long grass pressing wheel (74) on its outer protective cover (73) Shape enclosing item (73e)；The long long grass pressing wheel (74) for being equal to diameter of beating the grass of its described roller is rotatable, the axial direction of grass pressing wheel The long diameter for being much larger than its grass pressing wheel of length, that is, roller, the long diameter for being at least its grass pressing wheel of axial length, that is, roller of grass pressing wheel 3 times；The diameter of beating the grass refers to that cutter is arrived in the limit (73c) for the rope of beating the grass that its described outer protective cover (73) is equipped with The distance of Pivot axle is radius of beating the grass, and 2 times are the diameter of beating the grass；And long its roller of grass pressing wheel (74) is grown to be equal to and be beaten Careless diameter then can just be pressed onto the grass just cut；The long long grass pressing wheel (74) for being equal to diameter of beating the grass of its described roller is to can be rotated And its grass pressing wheel the long diameter for being much larger than its grass pressing wheel of axial length, that is, roller, axial length, that is, roller of grass pressing wheel it is long or 10 times or more of the diameter of its grass pressing wheel, in order to press careless soil moisture conservation；The long long grass pressing wheel for being equal to diameter of beating the grass of its described roller (74) it is equipped with the careless slot (74b) of multiple pressures, slot is along its roller length direction or straight slot or wavy curved slot；And The slot cross-section (74a) for pressing careless slot or rectangular or semicircular, and the multiple pressure grass slot is at least 2, with Few skidding convenient for the soil moisture conservation of pressure grass and meadow embossing；The carburetor of its engine sets four bifurcated nozzles (70a) and refers to It along 4 gaps are set ring week is four bifurcated nozzles (70a) on the outlet of the nozzle (70) of the inside of carburetor, it is mixed to improve It closes combustion fluid state of the vapour through gap and is conducive to atomization；Two punchings that the equal pressure angle logatithmic spiral runner bilayer cooling is eliminated the noise Journey LPG engine, be near piston top dead center, in cylinder before the ignition of mixed gas of compressed piston upper, due to Piston train of dress portion moves up and opens the preparation air entry in latch-release cylinder, and fuel and sky are sucked in the crankcase below piston The gaseous mixture of gas；The pressure of the burning gases of the piston upper generated again due to igniting, piston is from top dead-centre to bottom dead centre direction Move and simultaneously close off air entry, the gaseous mixture in compression crankcase, in the piston upper of bottom dead center-nearby, from opening and closing exhaust outlet While the burning gases in cylinder are discharged to outdoor gas, the scavenging access being connected by crankcase with cylinder, in work Gaseous mixture is imported into the two cycle engine in cylinder from crankcase by preparation scavenging port in the latch-release cylinder of face beyond the Great Wall；The design has With the valve gear of crankshaft-synchronous, this valve is from crankcase to cylinder scavenging mouth, and the crankcase side of scavenging access is configured to Normally closed；When the valve-closing of the crankcase side of scavenging access, gaseous mixture in scavenging access by combustion gas flame It is allowed to burning of igniting, after HC reduction again from crankcase to scavenging port, the crankcase side of scavenging access is allowed to be open, logical in scavenging While the burning on road is sent out with gaseous mixture, the gaseous mixture in crankcase closes exhaust outlet before being discharged from exhaust outlet, this The two cycle engine for exactly substantially reducing the discharge of HC；It solves in pervious structure and the valve of the above-mentioned crankshaft same period Because not being designed, if scavenging port is not opened also after the flame extinction of burning gases, the flame of burning gases can make scavenging Gaseous mixture ignition in access and crankcase makes gaseous mixture without supplying in normal direction cylinder, and the opening of exhaust outlet will make scavenging port Opening spend early stage and open, when the exhaust outlet and scavenging port in cylinder are open at the same time, in crankcase and in scavenging access not Combustion mixture enters in cylinder from exhaust outlet, so a part of gaseous mixture is arranged in the state of unburned from exhaust outlet Out, the problem of becoming gaseous mixture (i.e. HC) increase in discharge gas；The present invention is in the air entry exhaust outlet scavenging port Except, after crankcase scavenging, opening and closing valve is added in the crankcase side of scavenging access, the gaseous mixture in scavenging access is firing Burn in the flame of gas and ignite and burn, and be in scavenging access and crankcase according to crankshaft and the valve of synchronizing cycle can be cut Disconnected, so the gaseous mixture in crankcase will not burn, while the combustion gas in scavenging access is in the valve with the crankshaft-synchronous period When opening, the gaseous mixture in crankcase can be extruded out in cylinder, when exhaust outlet and scavenging port are open simultaneously Initial stage, the burning gases in scavenging access are fed into cylinder, will not into external discharged exhaust gas from exhaust outlet HC is adulterated, is continued when exhaust outlet will close, in the spent gaseous mixture in scavenging access unburned mixed in crankcase It closes gas to be fed into cylinder, so the HC amount adulterated in exhaust gas can control reduction；The gas having with crankshaft-synchronous Door gear, is on crankshaft (57) plus the c-type circle (56a) of crank valve (56), the c-type circle of the crank valve (56) have a bit of open The two sides of mouth are set as the inclined wedge circle (56b) at oblique angle, have the side at oblique angle with crankshaft when the two sides of its a bit of opening Rotation just plays the role of shearing in the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and reduces impact；Described The two-stroke LPG engine that metal cap and the cooling of outer resin cover bilayer are eliminated the noise in having, it is further characterized in that, described having is same with crankshaft The valve gear of step, be on crankshaft (57) plus crank valve (56) c-type circle (56a) a bit of opening two sides be equipped with pair Several pressure coils (56f) is being opened when the logatithmic spiral side of the two sides of a bit of opening of the pressure coil is rotated with crankshaft Just formed when the oral area for the connection crankcase for closing the scavenging channel of cylinder pressure angle everywhere properties equivalent logatithmic spiral influence gas The effect of stream and buffering；The wedge (11b) of noise control strainer in scavenging channel is located at beside the technique butt strip (55)；Described Catalyst in scavenging channel beside technique butt strip (55) equipped with emission reduction rolls up (59) its platiniferous rhodium indium iridium, has touching to gas is flowed through Matchmaker's effect and noise control filter regulating and controlling effect, have regular hour difference and isolation and noise elimination adjustment effect, it is logical to scavenging to slow down HC The discharge of the exhaust outlet in road, to be formed in the engine for adding strainer in scavenging channel；Add double sieves and scavenging port in scavenging channel The two-cycle gasoline engine of portion's trimmer valve, there is emission reduction effect and effect up to standard, and the strainer (58) in scavenging channel is located at technique Beside butt strip (55), and separately there is strainer (58) to be located under scavenging channel；The strainer in scavenging channel is by a plurality of wire longitude and latitude It weaves, the strainer in scavenging channel has filtration, and be located under scavenging channel described separately has strainer i.e. sieve simultaneous Scavenging oral area trimmer valve, double sieve, that is, strainers are to breathing has regulating and controlling effect between gas and crankcase in cylinder；Metal in the tool The two-stroke LPG engine that cover and the cooling of outer resin cover bilayer are eliminated the noise is it is characterized in that, blade when to two-cycle gasoline engine idling Aerodynamic noise analysis, simulated with CFD (computational fluid dynamics), method is intended to by meter Calculation machine carries out " numerical experiment ", reappears physical process from point of theory；In the hope of receiving the cost that the numerical simulation compared with testing has The advantages of low, data are easily obtained, analyzed from point of theory problem and development with computer and model calculate week The effect of phase constantly reduces, and calculated result is more and more accurate；Flow field and field of turbulent flow to brush cutter carry out feasibility analysis sum number According to analysis, determines the blade of brush cutter and Cutting Road is sound source, the noise of brush cutter is simulated, for becoming for noise variation The simulation of gesture meets reality as far as possible, makes every effort to level of noise and experimental error 10% or so；Noise source and eddy current crack are set as rapid In laminar boundary layer fluid matasomatism interact between blade and fluid micellar generate and vortex disengaging, continuous spectrum random noise The variation for being set as flow regime generates outlet flow pattern modulation and outflow fluid and ambient atmos effect, and rotational noise is set as blade Fluid and stator and the surrounding fluid effect of drive generate, the noise energy of experimental data and noise spectrum and display different frequency region Related, blade of brush cutter rotary air dynamics noise basis frequency calculation formula: F=NZ/60, F are noise fundamental frequency, and N turns for blade Speed, Z are blade number；Do progress process: geometrical model is established, computer simulation, is compared with experimental result, is changed structure and is carried out Simulation, establishes noise model, experimental verification according to analog result；Way is from blade geometry and air duct geometry and rotating speed of flail Start with, establish cutting and blade CAD model, unstrctured grid ICEM is generated, and is calculated in rotating machinery with FLUENT fluid data Fluid calculation MRF model, considers variable velocity field and pressure field and tubulence energy, with LMS Virtual lab software, is made an uproar Sound spectrum analyzes noise source, obtains noise data and carrys out noise reduction；Stable state tentative calculation parameter setting: grid is 4120000 unstrctured grids And dynamic mesh INTERFACE, turbulence model are RANS (K-EPSILON), blade rotational speed takes 3000 revs/min, and iterative steps take 1000；The trial result has vorticity figure, pressure cloud atlas, speed vector figure, three-dimensional motion pattern, pressure contour surface figure and plane streamline Figure, there are also blade CAD models to generate unstrctured grid for the trial result, obtains important computations the result is that engine bush knife speed exists Low noise at 5700-7000 revs/min；Assistant analysis coarse filtration combines its spy of the two-stroke LPG engine of fine filtering buffering scavenging decompression film It is 5750 to 6950 turns per minute that sign, which also resides in its revolving speed,；Strainer (58) in its scavenging channel is the coarse strainer of 50 mesh；And it is another It is fie screen and scavenging oral area trimmer valve by 150 mesh that strainer (58), which is located under scavenging channel,；Equal pressure angle logatithmic spiral Runner bilayer cooling eliminate the noise two-stroke LPG engine it is characterized in that: the two-stroke LPG engine for LPG gas mixed airgun controller If pressure reducing valve membrane sheet；The engine with LPG fuel gas tank is driving gardens machine；The fuel gas tank has LPG combustion gas contains miniature propane fuel tank, and the front of the miniature propane fuel tank (t20) is equipped with pipe screw thread, so as to the fuel Entered engine through mixed airgun controller by pipe fitting and worked, the front of the fuel tank is additionally provided with safety valve so as in excess of the quota When overflow and rise safety effect；The rear portion of the fuel tank is equipped with tank bottom attic base (t20c), and on the tank bottom attic base (20c) Base holes (t20d) equipped with multiple equal distributions are with portable；The tank diameter of the fuel tank contains propane fuel less than 98 millimeters 465 grams convenient for by standard replacement；；Its spy of the two-stroke LPG engine of the equal pressure angle logatithmic spiral runner bilayer cooling noise elimination Sign is: the muffler ASSY (F7) of the hush tube containing catalyst (69) is mounted on two punching by the silencer pad (F8) On journey LPG engine, the exit of the muffler ASSY (F7) is nearby equipped with the inner outlet (F7C2) of interior metal cap (F7C1), It is outer again, it is equipped with the outer vent (F7j2) and log channel (F7j3) of outer resin cover (F7j1), at a distance so that bilayer cooling is eliminated the noise.

It continuously improves and two-stroke LPG engine that the perfect equal pressure angle logatithmic spiral runner bilayer cooling is eliminated the noise It is characterized in that, it contains the valve gear with crankshaft-synchronous, it is the c-type circle (56a) for adding crank valve (56) on crankshaft (57) Rotation and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the outer diameter of the outer circle of the c-type circle Gap (56 δ) between the oral area of the connection crankcase in the scavenging channel of the cylinder apart from engine 1E37F is in 0.02-0.07 Millimeter；It is further characterized in that the valve gear having with crankshaft-synchronous, is the C for adding crank valve (56) on crankshaft (57) The rotation of type circle (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the one of the c-type circle is small The central angle in two sides to the crankshaft center of circle of section opening is in 82-92 degree.It is filled it is characterized in that, it contains with the valve of crankshaft-synchronous Set, be on crankshaft (57) plus crank valve (56) c-type circle (56a) rotation and the scavenging channel of latch-release cylinder connection crankshaft The oral area of case and formed, the central angle in two sides to the crankshaft center of circle of a bit of opening of the c-type circle is in 84-88 degree；Pressure Contracting is than being not more than 12.It is characterized in that, the valve gear having with crankshaft-synchronous, is to add crank valve on crankshaft (57) (56) rotation of c-type circle (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the crankshaft (57) be equipped with c-type edge (57a) its be it is corresponding with the described plus a bit of opening of C type circle (56a) of crank valve (56) and Cooperation is realized by a location hole.

It continuously improves and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) The rotation of (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the crankshaft (57) is equipped with C Type edge (57a) its be corresponding with the described plus a bit of opening of c-type circle (56a) of crank valve (56) and by a positioning Pin or a positioning sleeve cooperate to realize, and fixed with three screws.Have and crankshaft-synchronous it is characterized in that, described Valve gear, be on crankshaft (57) plus the c-type circle (56a) of crank valve (56), the c-type circle of the crank valve (56) has one The two sides of segment opening are set as the pressure coil (56f) at oblique angle, when pair of the two sides of a bit of opening of the pressure coil Number helical side is rotated with crankshaft, just forms pressure angle everywhere in the oral area of the connection crankcase in the scavenging channel of latch-release cylinder The logatithmic spiral of properties equivalent influences the effect of air-flow and buffering.

It continuously improves and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) (56a), the c-type circle of the crank valve (56) have the two sides of a bit of opening to be set as the inclined wedge circle (56b) at oblique angle, work as institute The side for having oblique angle for stating the two sides of a bit of opening of c-type circle is rotated with crankshaft, the company in the scavenging channel of latch-release cylinder Shear flow is just formed when the oral area of logical crankcase and reduces the effect of mutation impact.Described having is filled with the valve of crankshaft-synchronous It sets, is the c-type circle (56a) for adding crank valve (56) on crankshaft (57), the c-type circle of the crank valve (56) has a bit of opening Two sides be set as the inclined wedge circle (56b) at oblique angle, a bit of the opening of the inclined wedge circle (56b) of the c-type circle of the crank valve (56) The angle of the central axes at oblique angle and every side crankshaft that the two sides of mouth are equipped with is at 23.5 degree, when the inclined wedge circle (56b) of the c-type circle The side for having oblique angle of two sides of a bit of opening rotated with crankshaft, the connection crankcase in the scavenging channel of latch-release cylinder Oral area when, just form the effect of shear flow and slow drop mutation impact.

It continuously improves and the two cycle engine of perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination is beneficial to drop It is mild to eliminate the noise；Its revolving speed is 5750 to 6950 turns per minute；Strainer (58) in its scavenging channel is the coarse strainer of 60 mesh；And it is another It is fie screen and scavenging oral area trimmer valve by 180 mesh that strainer (58), which is located under scavenging channel,.The vapour of engine is to multi-party Squeezed out to dispersion, have a vibration back and forth trembled and to adding fuel to the flames effect of steam flow, in the gas for accelerating fluid and coming from air filter Stream sharply mixes when handing over atomization and is more conducive to polymerize contaminated product effect and diverging mixed effect, is entered with the carburetion state being more atomized Engine；Cutter sets multiple sawtooth, continuously improves and perfect two cycle engine improves the quality of gardens machine.

The present invention solves the technical solution that its technical problem is taken and method is:

A kind of high-power brush cutter of low-noise energy-saving is additionally provided with strainer i.e. sieve in scavenging beneath galleries and scavenging oral area is slow Valve is rushed, double sieve, that is, strainers are to breathing has regulating and controlling effect between gas and crankcase in cylinder；Engine speed is set as per minute 6300 Switch to good；Strainer (58) in scavenging channel is the coarse strainer of 60 mesh；And separately having strainer (58) to be located under scavenging channel is 180 Purpose fie screen；The catalyst that a plurality of wire is equipped with emission reduction by strainer made of knitting device rolls up (59), platiniferous, rhodium, indium and Rare earth element has catalyst effect and noise control to filter regulating and controlling effect to gas is flowed through；The exhaust gas of engine not direct emission, but first By the hush tube containing catalyst (69), then by function hush tube (54d), assist the tubule of hush tube (54g), fish scale point It splits (54e), variable cross-section air hose (54f) noise reduction, it is then indirect far from population by the nearly tool bore (28a) of the aluminum pipe more than one meter again Discharge；There are regular hour delay difference and isolation and noise elimination and obstruct adjustment effect, slows down pneumatic noise and the discharge of HC；Its It is characterized in that, containing the cutter with laser head and disc cutterbar dual-purpose；The brush cutter matches function hush tube and change using a kind of The engine of the two-stroke alcohol fuel of section air hose and repacking G pad；It contains silica gel damping pad (54a), function hush tube (54d), the tubule for assisting hush tube (54g), fish scale wedge (54e), variable cross-section air hose (54f)；The cylinder of the engine The exhaust outlet connection hush tube containing catalyst (69), then by function hush tube (54d), auxiliary hush tube (54g) tubule, Fish scale wedge (54e), variable cross-section air hose (54f) noise reduction；The hush tube containing catalyst (69) of the exhaust outlet connection of cylinder block (g44) Outgassing direction side is equipped with the silica gel damping pad (54a) and the variable cross-section air hose (54f) equipped with series winding；The variable cross-section The inside of air hose (54f) is equipped with the function hush tube (54d)；The function hush tube (54d) is the series winding at interval, And the song of the range of decrease along the approximate similar odd function with reference to multiple limited sinusoidal wave trains that one third octave is the period Line is axis；Multiple function hush tube (54d) groups are combined into the length and caliber of each hush tube of multistage noise elimination It all changes, sees that the length of each hush tube is shortened in single file and caliber has step by step toward outgassing direction from front to back It is reduced；Each hush tube that multiple function hush tube (54d) groups are combined into multistage noise elimination is equipped with multiple described Fish scale wedge (54e) and the wedge (50d) for having through-hole；The fish scale wedge (54e) is equipped with the small slot of arc and has through-hole Wedge (50d)；The auxiliary hush tube (54g) of the collateral branch of auxiliary is additionally provided on the function hush tube (54d)；Described is auxiliary Helping hush tube (54g) is tubule, and the tubule has the wedge (50d) of through-hole；The variable cross-section air hose (54f) is to become to cut Face, be at least three swell and have at three be reduce；The variable cross-section air hose (54f) be it is curved, at least There is turn at three；The main rotating shaft line for blowing paddle wheel fan and the main rotating shaft line of the Wind Volume turbine (54c) have angle With regard to hindering outflow of the main noise of noise along straight central axes directly forwardly and rearwardly；What the Wind Volume turbine (54c) came out The first function hush tube (54d) and the hush tube that the inside that blowing enters the variable cross-section air hose (54f) is equipped with The small slot of arc and have the first quilt of the wedge (50d) of through-hole that the multiple fish scale wedges (54e) being equipped with are equipped with Compression comes out again and expands first order noise elimination process of just completing, the side for the auxiliary that the function hush tube (54d) is equipped with The tubule of the auxiliary hush tube (54g) of branch is to provide some outlets for air-flow more and all not mixing away from supervisor further to mention High noise elimination effect；The variable cross-section air hose (54f) is variable cross-section, and air-flow is from swollen portion bit stream to diminution position to compression-expansion There is booster action；The variable cross-section air hose (54f) is that curved have turn to have booster action to preventing main noise from directly spreading out of；It is complete At the air-flow of first order noise elimination process come out from first function hush tube (54d), in rising for variable cross-section air hose (54f) It is expanded in big cavity, and through bend, the second function hush tube (54d) all changed subsequently into length and caliber is simultaneously passed through Being compressed again for the small slot of arc and the wedge (50d) that has through-hole of auxiliary hush tube (54g) and fish scale wedge (54e) is swollen It is swollen and complete the second level have make an uproar frequency variation noise elimination process；Complete second level noise elimination process from second function hush tube The air-flow that (54d) comes out, expands, and through bend in the cavity of the swell of the variable cross-section air hose (54f), subsequently into length And the third function hush tube (54d) that all changes of caliber and through the auxiliary hush tube (54g) and fish scale wedge (54e) The small slot of arc and have through-hole wedge (50d) compression-expansion and after completing third level noise elimination process, from the air port of diminution Noise abatement is blown out, then is run in by the separate population of filtering wet fog bottle on the nearly tool bore (28a) of the aluminum pipe more than one meter again It puts；In the entrance of the piston pin end of engine piston, should not common pin hole chamfering (d18), on engine piston drawing The chamfering (d18) of pin hole is removed, and has Kong Erwu chamfering to be mounted directly two G type elastic cushions, is zero with regard to rejection rate, actual effect meaning It is unexpected.

Did it is a kind of put-put piston pin end and meanwhile install two G type elastic cushions automated exchanged cutter positioning mechanism, though It can be used for production, but its outstanding problem to be high rejection rate.The entrance of the piston pin end of many engine pistons is broken and makes Engine piston is scrapped；Tried many schemes, groped several years it is all undesirable, but later with a unexpected method solution , here it is the entrance of the piston pin end in engine piston should not common hole chamfering, be mounted directly two G type elastic cushions just Rejection rate is zero, is used successfully to produce several years, is firmly believed, and the report present invention is now just dared, in the work of engine piston The entrance at plug pin end, should not common hole chamfering, have hole, no chamfering.Reason may be some for having the G type elastic cushion of opening With regard to skew when position contradicts chamfering (d18) of upper pin hole, so that piston is scrapped, no chamfering is all right, but in this way hair The chamfering (d18) of pin hole is removed on motivation piston drawing, who does not expect before, even if presently disclosed this is unable to the rhymed formula of chamfering Key, perhaps people is also recalcitrant, but the entrance of the piston pin end of engine piston should not common hole chamfering, there is Kong Erwu to fall Angle is zero with regard to several years rejection rate, and actual effect is exactly unexpectedly good.According to the regulation of machine-building, in general such as The important hole of the cooperation crankpin of the entrance of the piston pin end of such elephant engine piston should not the chamfering in common hole be It is inconceivable.Just the opposite is that the piston for not having chamfering is put into one kind small-sized under the occasional case for having forgotten to process chamfering The automated exchanged cutter positioning mechanism that two G type elastic cushions are installed at engine gudgeon pin end simultaneously just knows that rejection rate is zero, reassembles piston Pin and crank connecting link and system test and outlet are just dared to confirm this discovery for several years.

Detailed description of the invention

Present invention will be further explained below with reference to the attached drawings and examples.

Fig. 1 is the schematic diagram of brush cutter.

Fig. 2 is the perspective view of the explosion of the top half of brush cutter.

Fig. 3 is the perspective view of the explosion of the lower half portion of brush cutter.

Fig. 4 is the schematic diagram for removing outer cover and shield of brush cutter.

Fig. 5 is perspective view of the explosion of the brush cutter containing engine.

Fig. 6 is the diagrammatic cross-section of the carburetter body containing four bifurcated nozzles (70a) of brush grass-mowing machine engine.

Fig. 7 is the three-dimensional signal of the carburetter body containing atomizer of brush grass-mowing machine engine and carburetor assembly (F56) Figure.

Fig. 8 is the brush grass-mowing machine stereoscopic schematic diagram for having the disc cutterbar of inner cutter hole (642) and outer cutting edge (641).

Fig. 9 is the brush grass-mowing machine local overlooking schematic diagram for having the disc cutterbar of inner cutter hole (642) and outer cutting edge (641).

Figure 10 is the stereoscopic schematic diagram that outer protective cover is equipped with the long long grass pressing wheel (74) for being equal to diameter of beating the grass of its roller.

Figure 11 is the stereoscopic schematic diagram of the disc cutterbar of the belt length grass pressing wheel of brush grass-mowing machine.

Figure 12 is the stereoscopic schematic diagram of the stock of brush grass-mowing machine and disc cutterbar that band is beaten the grass.

Figure 13 is the stereoscopic schematic diagram for the disc cutterbar that the band of brush grass-mowing machine is beaten the grass.

Figure 14 is the diagrammatic cross-section of piston.

Figure 15 is to return to alter the two of the piece reduction discharge three-dimensional signal for rushing gasoline engine cylinder with scavenging road junction inclined wedge turbulent flow Figure.

Figure 16 is to return to alter the two of the piece reduction discharge partial enlargement for rushing gasoline engine cylinder with scavenging road junction inclined wedge turbulent flow Schematic diagram.

Figure 17 is to narrow double auxiliary blow vents of left and right block to reduce the two of discharge and rush the positive of the left block of petrol engine Schematic diagram.

Figure 18 is that double auxiliary blow vents of narrowed left and right block reduce the two of the discharge reverse side for rushing the left block of petrol engine Schematic diagram.

Figure 19 is the stereoscopic schematic diagram of two installation sites for rushing petrol engine original left and right block.

Figure 20 is that double auxiliary blow vents of narrowed left and right block reduce the two of the discharge schematic diagram for rushing the right block of petrol engine.

Figure 21 is that double auxiliary blow vents of narrowed left and right block reduce the receipts for the left and right block that the two of discharge rushes petrol engine Narrow double auxiliary blow vents close on plus the schematic diagram of the piston of double auxiliary skirt rims.

Figure 22 is that double auxiliary blow vents of narrowed left and right block reduce the two of the discharge middle section for rushing the left block of petrol engine Schematic diagram.

Figure 23 is the schematic diagram of the another angle of cylinder body of the scavenging road junction equipped with technique butt strip (55).

Figure 24 is the schematic diagram of the cylinder body for the two-cycle gasoline engine that partial cut-out shows layered scavenging in cylinder.

Figure 25 is the schematic diagram for the layering gas storage piston that partial cut-out shows sectional cross section.

Figure 26 is the schematic diagram of the layering gas storage piston of partial cut-out.

Figure 27 is the schematic diagram for the layering gas storage piston that partial cut-out shows sectional cross section.

Figure 28 is the schematic diagram of the crosscutting layering gas storage piston for showing cutting cross section in part.

Figure 29 is the schematic elevation view for being layered gas storage piston.

Figure 30 is that the complete section of layering gas storage piston cuts the schematic diagram of cross section.

Figure 31 is the schematic diagram for being layered gas storage piston and crankshaft-link rod.

Figure 32 is the schematic diagram of the cylinder body for the two-cycle gasoline engine that partial cut-out shows layered scavenging in cylinder.

Figure 33 is the schematic diagram of the cylinder body for the two-cycle gasoline engine for removing butt strip and showing the layered scavenging in cylinder.

Figure 34 is the schematic diagram of conventional crankshaft-link rod.

Figure 35 is the schematic diagram for adding the crankshaft (57) and connecting rod of the c-type circle (56a) of crank valve (56).

Figure 36 is the schematic diagram for adding the cylinder body of c-type circle (56a) and two-cycle gasoline engine of crank valve (56).

Figure 37 is plus the signal of the cylinder body of the c-type circle (56a) of crank valve (56) and gap (56 δ) and two stroke engine Figure.

Figure 38 is the schematic diagram for adding the c-type circle (56a) of crank valve (56).

Figure 39 is the schematic diagram for adding the c-type edge (57a) of crankshaft (57) of crank valve (56).

Figure 40 is the schematic diagram for adding the cylinder body of c-type circle (56a) and two stroke engine of crank valve.

Figure 41 is the schematic diagram for adding the inclined wedge circle (56b) of crank valve (56).

Figure 42 is the schematic diagram for adding the pressure coil (56f) of crank valve (56).

Figure 43 is the schematic diagram of the strainer (58) in scavenging channel.

Figure 44 is the schematic diagram of the wedge (11b) of the noise abatement in scavenging channel.

Figure 45 is the schematic diagram of the another side of the wedge (11b) of the noise abatement in scavenging channel.

Figure 46 is the schematic diagram of the another side of the catalyst volume (59) of the emission reduction in scavenging channel.

Figure 47 is the diagrammatic cross-section put on piston stroking upward to scavenging port.

Figure 48 is the diagrammatic cross-section put under piston stroking upward to scavenging port.

Figure 49 is diagrammatic cross-section of the piston stroking upward to top dead centre.

Figure 50 is the diagrammatic cross-section that piston downlink is in position on exhaust outlet top.

Figure 51 is that piston comes downwards to the diagrammatic cross-section put on scavenging port.

Figure 52 is diagrammatic cross-section of the piston to lower dead center.

Figure 53 is the diagrammatic cross-section of exhaust close.

Figure 54 is diagrammatic cross-section when air entry starts to open.

Figure 55 is to add the diagrammatic cross-section of the two-cycle gasoline engine of double sieves and scavenging oral area trimmer valve in scavenging channel.

Figure 56 is a kind of noise figure of method analyzed with computer numerical computer aided simulation aerodynamic noise.

Figure 57 is the schematic diagram of two-cycle gasoline engine LPG propane container (t20).

Figure 58 is the schematic diagram of the rear side of double coarse filtration combination fine filtering buffering valve chambers.

Figure 59 is the schematic diagram of double coarse filtration combination fine filtering buffering valve chambers.

Figure 60 is the stereoscopic schematic diagram that the cutting of metal cap and outer resin cover bilayer cooling silencer in having is opened.

Figure 61 is the diagrammatic cross-section of metal cap and outer resin cover bilayer cooling silencer in having.

Figure 62 is the schematic diagram of a kind of noise reduction and the engine for reequiping G pad.

Figure 63 is the schematic diagram of the side cutting of fish scale wedge (54e).

Figure 64 is function hush tube (54d) and the schematic diagram for assisting hush tube (54g).

Figure 65 is the signal of the automated exchanged cutter positioning mechanism in put-put piston pin end while two G type elastic cushions of installation Figure.

Figure 66 is the sectional view of the piston (g31) for the deep gouge (g18) that no chamfering places G type elastic cushion (g7).

Figure 67 be have chamfering have place G type elastic cushion (g7) deep gouge (g18) piston (g31) sectional view.

Figure 68 is the schematic diagram of the side of G type elastic cushion (g7).

As shown, in figure:

1. being two cycle engine；2. being hexagon socket cap head screw M6x30；3. being hexagon socket cap head screw M5x8；4. It is 1 type hex nut M6；5. being PP wire clamp；6. being PA hanging ring；7. being 41 type non-metallic insert hexagonal locking nut M5；8. being POM hanging ring fixing seat；9. being hexagon socket cap head screw M5x20；10. connecing aluminum pipe before being11. being manipulation hand Assembly；12. being control handle pipe；13. being 13 band spring washer hexagon socket cap head screw M5x25；14. being hand handle fixing seat Upper clamp plate；15. being hand handle fixing seat；16. being left handgrip component；17. being nitrile rubber hand handle shock-absorbing sleeve；18. being that hand handle is fixed Seat lower clamp plate；19. being left handgrip pipe；20. being five leaf nylon tubes21. being transmission shaft22. being zanjon Ball bearing；23. being spring washer 6；24. being hexagon socket cap head screw M6x23；25. being aluminium tube joint；26. being locking knob；27. It is shaft adapter；28. being rear aluminum pipe29. being 4 hexagon socket cap head screw M5x12；30. being 4 bullets Spring washer 5；31. being limit handle spring；32. being limit handle lock；33. being limit handle；34. being split washer 2.5；35. It is shield fixing seat；36. being circlip for hole 26；37. being circlip for shaft 10；38. being roundlet gear with curved teeth；39. being Small arc-shaped gear oil is stifled；40. being hexagon socket cap head screw M6x14；41. being hexagon socket cap head screw M6x10；42. being flat Washer 6；43. being gear-box；44. being great circle gear with curved teeth；45. being splined shaft；46. being deep groove ball bearing 6002；47. being hole bullet Property retaining ring 32；48. being gear-box shield；49. being spline pad；50. being 3 tooth disc cutterbars；51. being cutterhead pressing plate；52. being cutterhead shield Cover；53. being that 1 type hex nut M10 is left-handed；54. being nylon moving head；54a. is sharp sword；54b. is to cut pile to beat the grass wire； 55. being harness；56. being hexagon nut with flange M5；57. being small blade；58. being knife rest；59. being cross recessed pan head tapping screw ST4x14；60. being interior shield；61. being shielding support；62. being hexagon socket cap head screw M5x35；63. being 2 tooth cutteves Disk；64. being disc cutterbar；65. being 8 tooth disc cutterbars；16-1. being left handgrip；16-2. is 1 type hex-head nut M5；16-3. being ten Word slot pan head screw M5x20；16-4. is Cross Recess Head Screw M5x30；66. being the waistband for having pallet；67. being pallet；68. It is that auxiliary turns ball；69. being catalyst hush tube；70. being the interior straight tube of atomizer；70a. is four bifurcated nozzles；71. being to have helicla flute Vortex spray bar；72. being that atomizer has a parabolical horn mouth；73. being outer protective cover；73a. is screw hole location；73b. It is installation card slot；73c. is the limit of rope of beating the grass；73d. is grass pressing wheel mounting bar；73e. is arc enclosing item；74. being long pressure Grass wheel；641. be outer cutting edge；64a. is outer sawtooth；642. be inner sawtooth；74a. is the pressure grass slot cross-section of long roller grass pressing wheel； 74b. is multiple pressure grass slots of long roller grass pressing wheel；19b. is the damping adapter tube (19b) for having close circle helical spring shape；It F1. is starting Device assembly；It F2. is starting driver plate component；It F3. is 2 oil sealings；It F4. is right case；It F5. is 2 deep groove ball bearings；It F6. is 2 Hexagonal cylindrical head plain cushion screw assemblies M5 × 45 in torque 7-9NM；It F7. is the muffler ASSY for contacting matchmaker's hush tube (69)； It F8. is silencer pad；It F9. is the right shock-reducing sleeve of fuel tank；It F10. is 2 retaining ring for piston pins；It F11. is piston pin；It F12. is needle roller Bearing；It F14. is piston ring；It F15. is crank assemblby；It F16. is woodruff key；It F17. is cylinder block pad；It g44. is cylinder block； It F19. is 2 interior hexagonal cylindrical head screw assemblies M5 × 20；It F20. is engine enclosure；F21. be recessed pan head tapping screw ST5 × 14；It F22. is igniter assembly；It F23. is 2 cross fluting screw assemblies M4 × 20；It F24. is spark plug；It F25. is no asbestos Rubber slab mould assembling pad；It F26. is 2 mould assembling positioning pins；It F27. is left box body；F28. be 5 crosses fluting screw assemblies M5 × 25；It F29. is magnetic flywheel；It F30. is clutch assembly；It F31. is clutch disk；It F32. is circlip for shaft；It F33. is fuel tank Left shock-absorbing sleeve L (F33)；It F34. is the right shock-absorbing sleeve R of fuel tank；It F35. is inserts bearing connection seat；It F36. is 3 cross fluting groups Close screw M5 × 20；It F37. is upper clamp plate shock-absorbing sleeve；It F38. is lower clamp plate shock-absorbing sleeve；It F39. is upper clamp plate；It F40. is lower clamp plate； It F41. is 2 interior hexagonal cylindrical head screw assemblies M5 × 18；It F42. is flame-out wire clamp；It F43. is air filter seat；It F44. is 2 Air filter seat pad set；It F45. is soft polyurethane foam filter core；It F46. is air filter pressing plate；It F47. is 2 M5 spring washers；F48. It is 2 cross fluting coiled hair bullet screw M5 × 63；It F49. is air filter lid；F50. be cross fluting coiled hair screw assemblies M5 × 14；It F51. is 2 air inlet pipe pads；It F52. is deflector；It F53. is polyphenylene sulfide PPS air inlet pipe；It F54. is grounding wire component； It F55. is no asbestos packing sheet carburetor packing；It F56. is carburetor assembly；It F57. is PU yellow transparent oil return pipe；It F58. is PU Black oil inlet pipe；It F59. is oil-resistant acrylonitrile-butadirubber rubber oil pipe seat；It F60. is fuel filter assembly；It F61. is oil pipe clip；F62. it is HDPE is blow molded fuel tank；It F63. is cap assembly of fuel tank；It F64. is 5-7NM hexagon-headed bolt plain cushion combination M6X14；It F65. is 4 3- 5NM cross fluting screw assemblies M5X18；It g31. is piston (g31)；It g37. is double auxiliary skirt rims (g37)；G38 is double auxiliary skirt rims Bottom edge (g38)；G39 is lower fillet (g39)；It g40. is the side (g40) of double auxiliary skirt rims；It g41. is upper fillet (g41)；G42. it is The concave arc side (g42) on bottom edge；It g43. is the through-hole (g43) of piston and double auxiliary skirt rims；It g44. is cylinder body (g44)；It g45. is scavenging Road junction (g45)；It g46. is that inclined wedge turbulent flow time alters piece (g46)；It g47. is that inclined wedge turbulent flow goes back to the scavenging road junction (g47) for altering piece；g48. It is the inclined wedge (g48) at logical scavenging road junction；It g49. is that returning for the logical scavenging road junction that inclined wedge turbulent flow time alters piece alters grid (g49)；G50. it is The turbulent shield (g50) at logical scavenging road junction；51b. is left double auxiliary blow vents (51b)；52b. is right double auxiliary blow vents (52b)； g51. It is left block；51b. is left double auxiliary blow vents；51C. is long reinforcing rib；51d. is short reinforcing rib；51e. is reinforcement arm pawl； 51f. is rear wall；It g52. is right block；52b. is right double auxiliary blow vents；53. being that two air flue walls are also known as scavenging air belt partition wall；53a. It is the foot of a wall portion；53b. is rear metope；53c. is preceding metope；53d. is wall end；53j. is Fourier function notch；54. being tool Periodic function gibbs overshoot convergence wave Fourier piece wall；54j. is transition inflection point；54k. is fluctuating convex-concave；51g. is left oblique side Face；51y. is left straight sided；51h. is left broad side surface；52g. is right prism；52y. is right straight sided；52h. is right wide side Face；31a. is gas storage pit；31b. is crosscutting hatching；44a. is blow vent；44b. is into gas port；44c. is into air Mouthful；44d. is the first scavenging port；44f. is the second scavenging port；44e. is envelope high-wall；55. being technique butt strip；55g. is interval It is stupefied；55e. is interval notch；55d. is the first scavenging side wall；55d. is the second scavenging side wall；44j. is perforation heat release hole；44k. It is straight-through heat release hole；(44x, 44v) is to reinforce heat dissipation in flakes；56. being crank valve；56a. is c-type circle；57. being crankshaft；56 δ are Gap；57a. is c-type edge；56b. is inclined wedge circle；56f. is pressure coil；58. being strainer；59. being catalyst volume；It t20. is miniature LPG propane fuel tank；It t20c. is tank bottom attic base；It t20d. is the base holes of tank bottom attic base (t20c)；It F7C1. is interior metal cap； It F7C2. is inner outlet；It F7j1. is outer resin cover；(F7j2) is outer vent；It F7j3. is log channel；The nearly knife of 28a. aluminum pipe Hole (28a)；54a. resilient cushion 54a；54g. assists hush tube 54g；54d. function hush tube 54d；54e. fish scale wedge 54e； 54f. variable cross-section air hose 54f；G2. skewed slot (g2)；(g1,1b) be clamping cylinder (g1,1b), g15. main body guide holder (g15), G13. anti-rotation block (g13), g8. primary push rod (g8), g16. cylinder mounting base (g16), g19 cylinder (g19), g21. cylinder push away Plate (g21), g20. master are servo-actuated push plate (g20), g22. master is servo-actuated pulling block (g22), g23. auxiliary clamp seat (g23), g24. base (g24), g7.G type elastic cushion；G31. piston (g31).

Specific embodiment

A kind of further improved engine, exhaust outlet connection catalyst hush tube (69) of cylinder and function hush tube (54d), tubule, fish scale wedge (54e), variable cross-section air hose (54f) noise reduction for assisting hush tube (54g)；The function is eliminated the noise Pipe (54d) is the series winding at interval, and along it is approximate it is similar with reference to one third octave be the period multiple limited sines The curve of the range of decrease of the odd function of the wave train is axis；It, should not common pin hole in the entrance of the piston pin end of engine piston Chamfering (d18) be mounted directly two G type elastic cushions just without waste product.

To make up mobile jib micro the phenomenon that rocking caused by the existing mechanism of brush grass-mowing machine, one kind provided by the invention is used for The main aluminium bar of the length of the improvement of brush cutter is fastened as in catalase hush tube loading machine, and with F41 screw；Exhaust gas is set to pass through silencer Assembly and catalase hush tube 69, then by long main aluminium bar, and arranged from the gap of the close cutter of aluminium bar end or aperture gap Out.

50% or more power per liter can be improved relative to four-stroke engine with two stroke engine in brush cutter, but is discharging On to take measures；Grass-mowing machine is portable dam, it is desirable to which power is light and small；Former stock is changed to the noise elimination of more honeycombs and catalase Pipe, from distal exit；Usefulness is to change to be hovered around by the exhaust gas of the engine direct emission by person of modern times originally, portion Point exhaust gas can be sucked by engine and carburetor air inlet, and the situation that portion can be sucked by people, after catalase hush tube between The method put of running in makes to discharge low and discharge outlet far from people, safer, and emission reduction reinforcement；There is transparent shield to be more convenient for seeing It examines, the mode of operation of the new pallet waistband of brush cutter is additionally provided, when expanding operating radius, that is when encountering big filling Wood when reaching treetop, or will cut at a distance and when having puddle blocking, with the lengthening mode for engine being put into pallet waistband, make Cutterhead elongation, this also easily more stable operation.There is transparent shield, is the local transparent or all saturating on the shield of cutter It is bright, it can preferably observe and cut off and operate, reduce card resistance.There is the bush knife of periphery blade and inner circumferential blade, it will be apparent that improve Brush allows branch and card resistance.There are also the steady stock interfaces of side flange and lateral filament button, have spiral spring or wave spring and subtract The hand handle of vibration has the carburetor of inside spin whirlpool nozzle；The environmental protection of grass-mowing machine is improved with Low-emission gasoline machine and multinomial measure Quality and usability.Low-emission gasoline grass-mowing machine beats the grass wire 54b's with cutting pile it is characterized in that the cutter contains Moving head 54 is with the long-acting cutting of benefit, and the disc cutterbar 64 with inner sawtooth 642 to prevent allowing knife；And the carburetor of its engine is set Four bifurcated nozzle 70a are with benefit atomization；And the cutter is equipped with interior shield 60 and outer protective cover 73 and in its outer protection Cover is equal to the long grass pressing wheel 74 for diameter of beating the grass equipped with its roller length in order to press grass to preserve soil moisture and meadow decorative pattern, therefore its usefulness It is more.

It is set on what the moving head 54 contained by the cutter of Low-emission gasoline brush cutter was had cut pile beats the grass wire 54b There are multiple sharp sword 54a, the way of multiple point swords is to cut what pile went out under hammering with sharp plain chisel on wire.Alternatively, What the moving head 54 contained by cutter was had cut, and pile beats the grass that wire 54b is equipped with multiple sharp sword 54a, multiple point swords Way be on wire with have the plunger chip die of sharp edge cut under the impact of press machine pile go out.Pile is cut to beat the grass wire ratio Nylon wire is durable mostly, is not only conducive to long-acting cutting, few with line, saves into disk nylon wire；And it can beat the grass, moreover it is possible to straw is cut, And nylon wire cuts motionless thin bar；Beat the grass wire when cutting different objects and disc cutterbar complement each other it is each has something to recommend him.Cutter institute The outer cutting edge 641 of the periphery of the knife for 4 stretchings that the disc cutterbar 64 with inner sawtooth 642 contained is equipped with is equipped with multiple outer Sawtooth 64a, and the inner sawtooth 642 also has 4, and its every inner sawtooth 642 sets multiple sawtooth, thus it is handy.Cutting The outer protective cover 73 installed on the interior shield 60 that device is equipped be equipped with installation card slot 73b and 2 screw hole location 73a with Benefit installation, and the limit 73c equipped with rope of beating the grass on its outer protective cover 73, and be equipped on its outer protective cover 73 for installing length The grass pressing wheel mounting bar 73b and arc enclosing 73b of grass pressing wheel 74, therefore be easily installed.Its described roller is long straight equal to beating the grass The long grass pressing wheel 74 of diameter is rotatable, the long diameter for being much larger than its grass pressing wheel of axial length, that is, roller of grass pressing wheel.Its 2 times i.e. For the diameter of beating the grass；And the long diameter of beating the grass that is equal to of long its roller of grass pressing wheel 74 then can just be pressed onto the grass just cut, therefore press Careless effect is obvious.The long long grass pressing wheel 74 for being equal to diameter of beating the grass of its roller is rotatably that axial length, that is, roller of grass pressing wheel is long Much larger than the diameter of its grass pressing wheel, that is to say, that the axial length of its grass pressing wheel, that is, roller length is 10 times of the diameter of its grass pressing wheel, Not only convenient for pressure grass soil moisture conservation, but also material-saving, and if being conducive to pressure grass because advancing due to equally distance wheel footpath more carefully can roll several circles more.Wheel is too Thick then take material, what is also turned is excessively slow, and dash is few, rolls difference.Roller is long convenient for covering face, high-efficient；So with the pressure of thin length Grass wheel.Again because the long long grass pressing wheel 74 for being equal to diameter of beating the grass of its described roller is equipped with the careless slot 74b of multiple pressures, slot is long along its roller Direction or straight slot or wavy curved slot；And the slot cross-section 74a for pressing careless slot or rectangular, or half It is circular, therefore few skidding convenient for the soil moisture conservation of pressure grass and meadow embossing.Moreover the carburetor of the engine sets the spray of four bifurcateds Mouth 70a refers to that on the outlet of the nozzle 70 of the inside of carburetor be four bifurcated nozzle 70a along 4 gaps are set ring week, therefore It improves mixing combustion fluid state of the vapour through gap and is conducive to atomization；The carburetor of its engine sets four bifurcated nozzles 70a refers to that on the outlet of the nozzle 70 of the inside of carburetor be four bifurcated nozzle 70a along 4 gaps are set ring week, to change Good mixing fires fluid state of the vapour through gap and is conducive to atomization.Or in the carburetor assembly F56, improve atomizer It also along 4 gaps are set ring week is four bifurcated nozzle 70a that interior straight tube 70, which is on the outlet for have the vortex spray bar of helicla flute 71, It or is 3 bifurcateds, or be 5 bifurcateds, or be six bifurcateds, or be 7 bifurcateds, or be eight bifurcateds；If 1 gap or 2 gaps, then Vapour is irregular out；If 9 or more gaps, because outlet is less than 3mm, then gap is too fine and closely woven.When oil and gas is passed through in the carburetor The interior straight tube 70 of improvement atomizer in assembly F56 has the import of the vortex spray bar of helicla flute 71 to be set as parabolical loudspeaker The horn mouth of the archimedes curve of mouth 72 or conical section pours the interior straight tube 70 and has the vortex of helicla flute 71 Spray bar, then and then from the outlet of the spray bar along 4 gaps or 3-8 gap set in ring week to multi-direction dispersion Squeeze out, rather than only squeezed out from a hole to a direction, but by the outlet between the multiple gaps set in ring week institute's shape At multiple its have the vibration back and forth trembled because of cantilever beam principle and to the steam flow effect of adding fuel to the flames, will be in gasoline engine Air-breathing moment, in the aditus laryngis key position of this trunnion, when accelerating fluid sharply to mix with the air-flow to come from air filter to hand over atomization And be more conducive to polymerize contaminated product effect and diverging mixed effect, two cylinder bodies for rushing gasoline engine are entered with the carburetion state being more atomized In the scavenging road junction g45 of the symmetrical left and right each one of g44, then the inclined wedge turbulent flow time being equipped with through it alters piece g46 effect and enters two The piston for rushing gasoline engine is formed by combustion chamber with cylinder body therefore is conducive to week and reciprocally works.The air mass flow system of known carburetor It counts in Reynolds number 8x (1000-100000) range only 0.05 or so, and the discharge coefficient of main jet is true with the aditus laryngis of this trunnion The increase of reciprocal of duty cycle, that is, Reynolds number increases and increased dramatically so as to cause the reduction of Carburettor performace curve and mixture strength is become In enriching；Multiple of the aditus laryngis of this trunnion its have the vibration back and forth trembled be more advantageous to acceleration atomization i.e. acceleration carburetion.It narrows The inclined wedge turbulent flow that double auxiliary blow vents of left and right block and the scavenging road junction 945 of cylinder body g44 are equipped with, which returns, alters piece g46, and and piston Double auxiliary skirt rims g37 three's adapted for being equipped with of skirt section, have more drop row's effect.It is the knot for collecting many years domestic and foreign experience and groping It is brilliant；There is the emission reduction of batch production effect up to standard, can not only be marked up to 50 grams, and 39.9 grams can be dropped to, safety coefficient is big, waster Few, this is significant to large quantities of volume productions.It has determined that in the application of two cycle engine and starts batch to produce, and implies from now on 20 The developing direction of year Low-emission gasoline brush cutter.The present invention relates to the noise elimination of two cycle engine improvement, have function wave combustion chamber and Float electrode collocation, has double auxiliary skirt rims, has scavenging air belt inclined wedge piece, energy-saving and emission-reduction are up to standard, and multi-functional, and bright spot is significant；But people The invention that class aspires after perfection is endless, therefore spinning is repeated not to the utmost in the hope of casting a brick to attract jade.

For scavenging ventilation, in scavenging channel plus catalyst is rolled up, and adds strainer (58), if technique butt strip (55), if multiple Wedge (11b), C-shaped valve etc. style open multiple new ways in scavenging air belt energy emission reduction in two-cycle gasoline engine, although The mechanism of its atom level needs the following exploration, but it has determined that in the application of two-stroke gasoline engine scavenging air belt.

A kind of return with scavenging road junction inclined wedge turbulent flow alters piece and reduces the two-cycle gasoline engine of discharge, comprising cylinder body and Well known combustion chamber, spark plug, cylinder cap, piston, connecting rod, crankcase, lubricating oil pump, lubricating system, fuel system, ignition system, Cooling system, gas handling system, the cylinder body (44) be two-cycle gasoline engine dress piston cylinder chamber on along center The symmetrically cylinder body (44) at the scavenging road junction (45) containing left and right each one, it is characterized in that: in the symmetrical of the cylinder body (44) On the scavenging road junction (45) of left and right each one, respectively symmetrically each ground in left and right is equipped with inclined wedge turbulent flow time and alters piece (46), with benefit in scavenging At road junction generate turbulent flow come block exhaust gas return alter so as to reduce discharge.

A kind of scavenging road junction logarithmic differentiation equation turbulent flow returns the two-cycle gasoline engine for altering piece drop row, containing cylinder body and Well known combustion chamber, spark plug, cylinder cap, piston, connecting rod, crankcase, lubricating oil pump, lubricating system, fuel system, ignition system, Cooling system, gas handling system, the cylinder body (44) be two-cycle gasoline engine dress piston cylinder chamber on along center The symmetrically cylinder body (44) at the scavenging road junction (45) containing left and right each one, it is characterized in that: in the symmetrical of the cylinder body (44) On the scavenging road junction (45) of left and right each one, respectively symmetrically each ground in left and right is altered piece (46) equipped with inclined wedge turbulent flow time, and main body is pressure One section of the nearly equal logatithmic spiral by logarithmic differentiation equation of power corner connection is equal using the logatithmic spiral tool pressure angle of higher mathematics Feature then gush mixed air-flow on it as soon as returning the turbulent flow added alters section that piece has logatithmic spiral easily steadily, existed with benefit Block exhaust gas time at scavenging road junction using equal pressure angle generation turbulent flow to alter to reduce discharge.

Scavenging road junction logarithmic differentiation equation turbulent flow is taken to return the master for altering the piece of two-cycle gasoline engine of piece drop row One section of body,

Establish differential equation d ρ/d θ=k ρ:

It is equal everywhere because wanting pressure angle λ if polar equation ρ=ρ (θ), therefore tg λ=constant, tg λ=k is enabled,

By pressure angle formula tg λ=ρ '/ρ,

Just there is ρ '/ρ=k,

Differential it, just have differential equation d ρ/d θ=k ρ

D ρ/d θ=k ρ is solved, both sides integrate after variables separation:

∫ d ρ/ρ=∫ kd θ is easy to get because of ρ > 0:

Ln ρ=k θ+C,

Namely:

A therein is constant, is the primary condition of the size and CNC machine by workpiece and mold to determine.

Using PRO/ENGINEER WILDFIRE mapping software, working directory is newly set, creates part,

Parameter (PARAMETER) 1:C real number (real number) is established, it can be with being assigned between 0.01-1 according to specific operating condition Value, such as 0.3；C is also referred to as wave height.

Establish parameter (PARAMETER) 2:N integer (integer), can with according to specific operating condition between 2-100 choosing value, example Such as 13；N is also referred to as wave number.

Opening relationships (RELATION), i.e., equation is:

Logarithmic curve:

Z=0

X=10*t

Y=log (10*t+0.0001)

Produce logarithmic curve；

Followed by using rotation, merging, hypostazation etc. is instructed, and is assembled and merged with workpiece, can be modeled；

It is modeled again with the equation and PRO/ENGINEER WILDFIRE, inputs CNC machining center, used CIMATRO or MASTCAM, the punching block of pack alloy processed, or assisted with milling machine, planer and electrical spark working work；Use electric spark When processing, CNC machining center is inputted with the equation, then first to produce tungsten copper electrode, with the lathe for having three-dimensional rotation head, It is produced in batches again with die casting machine；It machines again；Or piston skirt is welded on the piece separately made.Logarithmic curve cam, intermediate work are answered Meeting.

With reference to higher mathematics Method of Mathematical Physics in Fourier function the continuous transition of rectangular wave overshoot Ji Bu The overshoot convergence wave of this phenomenon and with reference to lag theorem, shifting theorem, convolution theorem and it is single by the approximation of Fourier function Circular frequency and be unfolded be approximately the frequency spectrum gradually decayed for copying fourier series to draw it is multiple from greatly become smaller from it is thin become it is close Spike, it should be the high level overview of many actual phenomenons that mathematical physics is discribed, and engine blow-through air turbulent motion rule is not yet It should make an exception and surmount completely, should also have certain similar or inherent correlation or bring out the best in each other ought more or less use for reference it；In compression mod Shaping mould mold core on, manufacture and imitate the close and relevant Fourier function notch (53j) in inherence that is seeming and high-wall The transition inflection point (54j) on top have at least one close to 90 degree turn shape its be approximately gibbs overshoot convergence wave i.e. imitate Fourier series gibbs overshoot phenomenon draw gradually approach rectangle transition wave and be approximately that imitative fourier series are drawn The frequency spectrum gradually decayed have it is multiple from becoming smaller greatly from the thin fluctuating convex-concave (54k) for becoming close spike；So as to molding cylinder body Idiotype body such as mainstay and influence air-flow.There is having for suitable linear characteristic with imitative higher mathematics function and Fourier person's movements and expression The transition inflection point (54j) and imitative Fourier grade on the top of the Fourier function notch (53j) and high-wall of guidance and damping characteristic Having for the frequency spectrum gradually decayed that number is drawn is multiple comprehensive to noise from the thin fluctuating convex-concave (54k) for becoming close spike from becoming smaller greatly High frequency band, rate of explosion, compression ratio are advantageous.

With reference to higher mathematics Method of Mathematical Physics in family of parabolas equipotentiality streamline quadratic function curve shape, to point The flow direction of more gas storage of layer gas storage piston has directive significance.The side parabolic of scavenging air belt is leaned in the outside of the envelope high-wall (44e) The equipotentiality streamline of line race can use CNC numerical control processing.One section of scavenging air belt logatithmic spiral can also use CNC numerical control processing, logarithm spiral shell It has pressure angle equal advantage everywhere to line, that is, equiangular spiral, is conducive to the air motion of scavenging air belt.Two scavenging air belt interworkings, the Sweep its equal everywhere, and two of the equipotentiality streamline of the second scavenging road junction family of parabolas that have pressure angle of gas port equiangular spiral Secondary function curve shape, the Method of Mathematical Physics that higher mathematics is imitated at scavenging road junction is R&D direction, is answered with the test of high number scientific guidance It is got well than blindness is gathered together.It should be the high level overview of many actual phenomenons that mathematical physics is discribed, and engine blow-through air rule is not yet It should make an exception.

The two-stroke LPG that the equal pressure angle logatithmic spiral runner bilayer cooling of the catalyst scavenging gasoline brush cutter is eliminated the noise Engine, which is characterized in that the strainer (58) in the scavenging channel is located at beside the technique butt strip (55), the scavenging Strainer in channel is to be formed by a plurality of wire through knitting device, to breathing has filtering regulation to make between gas and crankcase in cylinder With；Noise control strainer in scavenging channel is equipped with multiple wedges (11b), and the wedge is multiple hollow six prismatics, has aperture on top, The advanced wedge compression of air-flow, then escape and expand from wedge aperture, there are noise control filtering regulation and noise elimination effect；In technique butt strip (55) in the scavenging channel beside equipped with emission reduction catalyst roll up (59), platiniferous rhodium indium iridium, to flow through gas have catalyst effect and Noise control filters regulating and controlling effect, has regular hour delay difference and isolation and noise elimination effect and obstructs adjustment effect, ingenious to slow down The discharge of pneumatic noise and HC.

The two-stroke LPG engine that the equal pressure angle logatithmic spiral runner bilayer cooling continuously improved is eliminated the noise, piston outside The gas storage pit (31a) of ad hoc left and right each one, it slightly resembles a pear in shape the gas storage pit, there is concentric reducer, at piston pin axle bed Smaller, far from larger at piston pin axle bed, the crosscutting hatching (31b) of the gas storage pit is curve, the gas storage pit Crosscutting hatching (31b) section thickness be greater than 2mm, the curve of the crosscutting hatching (31b) of the gas storage pit be throw The equipotentiality streamline of Wu Xian race, one section of streamline are that the flow function of Method of Mathematical Physics is imitated to meet Laplace's equation The quadratic function of the family of parabolas of the analytical function of harmonic function is conducive to gas storage scavenging.The equipotentiality streamline and tool of family of parabolas Logatithmic spiral has fair line and guidance and damping characteristic with imitative higher mathematics function, and synthesis is to noise high frequency band, pressure Increase ratio, compress when layered scavenging it is advantageous.The upper top of second scavenging side wall (55d) of the technique butt strip (55) is parabolic The quadratic function curve of line race is so as to the equal potential barriers with the outside of the envelope high-wall (44e) by the family of parabolas of the side of scavenging air belt The quadratic function curve shape of line coexists and forms the second scavenging road junction.Or curve is used instead with family of parabolas and logatithmic spiral.Technique The upper top of second scavenging side wall (55d) of butt strip (55) is that have the curve of logatithmic spiral equipotentiality streamline itself and the envelope high-wall The outside of (44e) coexists by the curved shape of the logatithmic spiral equipotentiality streamline of the side of scavenging air belt and forms the second scavenging road junction.Or Curve family of parabolas equipotentiality streamline or family of parabolas and logatithmic spiral adapted.Adapted is: the of the technique butt strip (55) The upper top for sweeping gas side wall (55d) is the outside of the curve of logatithmic spiral equipotentiality streamline itself and the envelope high-wall (44e) by scavenging The curved shape of the logatithmic spiral equipotentiality streamline of the side in road coexists and forms the first scavenging road junction；Meanwhile the technique butt strip (55) the upper top of the second scavenging side wall (55d) is the outer of the quadratic function curve of family of parabolas itself and the envelope high-wall (44e) Side by scavenging air belt side family of parabolas equipotentiality streamline quadratic function curve shape coexistence and formed the second scavenging road junction with Seek the comprehensive guide guiding role to gas storage scavenging.

The two-stroke LPG engine that the perfect equal pressure angle logatithmic spiral runner bilayer cooling is eliminated the noise is continuously improved, It is characterized in that: the cylinder body (44) is equipped with multiple reinforcements heat dissipation in flakes (44x, 44v) between its multiple cooling fin；And it is described Cylinder body (44) is equipped with perforation heat release hole (44j) in the cross-sectional direction of exhaust outlet；And in the air inlet of the cylinder body (44) Cross-sectional direction is also equipped with straight-through heat release hole (44k), therefore often there is improvement at the place of ignoring in people.

The present invention relates to energy-saving and emission-reduction, are the two-stroke LPG engines that the cooling of equal pressure angle logatithmic spiral runner bilayer is eliminated the noise, Its cylinder body (44) containing blow vent (44a), into gas port (44b), left and right each pair claim into air scoop (44c), left and right each pair The first scavenging port (44d), each pair second scavenging port (44f) that claims of left and right claimed, the outside of closed envelope high-wall is not i.e. by work Plug cylinder and be curved shape by the side of scavenging air belt, and coexist with the scavenging road junction of cylinder body by external technique butt strip (55), work Skill butt strip (55) stupefied (55g) containing interval, interval notch (55e), the first scavenging side wall (55d), the second scavenging side wall (55d), three A installation hole location and special-shaped packing, and it is formed with the scavenging road junction of cavity, piston (31) is equipped with the gas storage pit of left and right each one (31a).The equipotentiality streamline of family of parabolas and tool logatithmic spiral there is imitative higher mathematics function have fair line and guidance and resistance Damping characteristics are comprehensive, and to noise high frequency band, rate of explosion, compression, when layered scavenging is advantageous.

The two cycle engine that the cooling of equal pressure angle logatithmic spiral runner bilayer is eliminated the noise, it is characterized in that, the present invention is in work Dead center beyond the Great Wall since piston train of dress portion moves up and makes before the ignition of mixed gas of compressed piston upper in cylinder Preparation air entry in latch-release cylinder is opened, and the gaseous mixture of fuel and air is sucked in the crankcase below piston；And due to The pressure of the burning gases for the piston upper that igniting generates, piston is mobile from top dead-centre to bottom dead centre direction and simultaneously closes off air-breathing Mouthful, the gaseous mixture in compression crankcase makes the burning gases in cylinder from opening and closing exhaust outlet in the piston upper of bottom dead center-nearby To outdoor gas be discharged while, the scavenging access being connected by crankcase with cylinder, in piston upper latch-release cylinder by Gaseous mixture is imported into the two cycle engine in cylinder by preparation scavenging port from crankcase；The design has to be filled with the valve of crankshaft-synchronous It sets, this valve is from crankcase to cylinder scavenging mouth, and the crankcase side of scavenging access is configured to normally closed；In scavenging access When the valve-closing of crankcase side, the gaseous mixture in scavenging access is allowed to burning of igniting by the flame of combustion gas, and HC is reduced Later again from crankcase to scavenging port, the crankcase side of scavenging access is allowed to be open, in the burning mixing pneumatic transmission of scavenging access While out, the gaseous mixture in crankcase closes exhaust outlet before being discharged from exhaust outlet, and here it is keep the discharge of HC significant The two cycle engine of reduction；It solves in pervious structure and the valve of the above-mentioned crankshaft same period is not because being designed, combustion gas If scavenging port is not opened also after the flame extinction of body, the flame of burning gases can make the mixing in scavenging access and crankcase Gas ignition makes gaseous mixture without supplying in normal direction cylinder, and the opening of exhaust outlet will make the opening of scavenging port cross early stage unlatching, cylinder When interior exhaust outlet and scavenging port is open at the same time, the unblended mixture in crankcase and in scavenging access enters from exhaust outlet In cylinder, so a part of gaseous mixture is discharged in the state of unburned from exhaust outlet, become the mixing in discharge gas The problem of gas (i.e. HC) increases；The present invention after crankcase scavenging, is being swept except the air entry exhaust outlet scavenging port The crankcase side of gas access has added opening and closing valve, and the gaseous mixture in scavenging access ignites and burns in the flame of combustion gas, And be in scavenging access and crankcase according to crankshaft and the valve of synchronizing cycle can be truncated, so the gaseous mixture in crankcase is not It can burn, while mixing of the combustion gas in scavenging access when the valve openings with the crankshaft-synchronous period, in crankcase Gas can be extruded out in cylinder, the initial stage when exhaust outlet and scavenging port are open simultaneously, the burning gases in scavenging access It is fed into cylinder, HC will not be adulterated into external discharged exhaust gas from exhaust outlet, when exhaust outlet will close, The unblended mixture continued in crankcase in spent gaseous mixture in scavenging access is fed into cylinder, so exhaust The HC amount adulterated in gas can control reduction.The valve gear having with crankshaft-synchronous is to add crankshaft on crankshaft (57) The c-type circle (56a) of valve (56), the c-type circle have a bit of opening, when a bit of opening of the c-type circle is rotated with crankshaft, and The oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, so that it is double-deck to form equal pressure angle logatithmic spiral runner Cool down the two-stroke LPG engine eliminated the noise.

It is further improved and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) The rotation of (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the outer circle of the c-type circle Gap (56 δ) between the oral area of the connection crankcase in the scavenging channel of cylinder of the outer diameter apart from engine 1E39F is in 0.02- 0.08 millimeter；It is further characterized in that the valve gear having with crankshaft-synchronous, is to add crank valve on crankshaft (57) (56) rotation of c-type circle (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the c-type The central angle in two sides to the crankshaft center of circle of a bit of opening of circle is in 81-95 degree.

Usefulness of the present invention: being the gaseous mixture of compressed piston upper in cylinder near piston top dead center Before igniting, since piston train of dress portion moves up and open the preparation air entry in latch-release cylinder, in the crankcase below piston Suck the gaseous mixture of fuel and air；Its effect is to make to be vented the reduction of HC amount；Add double sieves and scavenging oral area slow in scavenging channel Rush valve.

Design key is that piston is mobile from top dead-centre to bottom dead centre direction and simultaneously close off air entry, i.e. piston length and vapour Port distance matches in cylinder, this, which is contemplated, is just not difficult to mark on the diagram, and processing is not also difficult to apply, and effect is to subtract exhaust HC amount It is few.

The described of the two-stroke LPG engine that the cooling of improved equal pressure angle logatithmic spiral runner bilayer is eliminated the noise has and crankshaft Synchronous valve gear, is on crankshaft (57) plus the c-type circle (56a) of crank valve (56), the c-type circle of the crank valve (56) have The two sides of a bit of opening are set as the inclined wedge circle (56b) at oblique angle, when the side for having oblique angle of the two sides of its a bit of opening While being rotated with crankshaft, just forming shear flow in the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and reducing mutation The effect of impact, to form the two-stroke LPG engine of double coarse filtration combination fine filtering buffering valve chamber scavenging pressure reducing valve film.

It is further improved and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws The valve gear having with crankshaft-synchronous it is characterized in that, described is held up, is the c-type circle for adding crank valve (56) on crankshaft (57) The rotation of (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the outer circle of the c-type circle Gap (56 δ) between the oral area of the connection crankcase in the scavenging channel of cylinder of the outer diameter apart from engine 1E34F is in 0.01- 0.06 millimeter；The valve gear having with crankshaft-synchronous is the c-type circle (56a) for adding crank valve (56) on crankshaft (57) Rotation and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, a bit of opening of the c-type circle The central angle in two sides to the crankshaft center of circle is in 79-97 degree；The valve gear having with crankshaft-synchronous is on crankshaft (57) Add the rotation of the c-type circle (56a) of crank valve (56) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, The crankshaft (57) is equipped with c-type edge (57a), and it is a bit of opening with described plus crank valve (56) the c-type circle (56a) It matches.

The two-stroke LPG that the perfect equal pressure angle logatithmic spiral runner bilayer cooling is eliminated the noise is further improved to draw It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) The rotation of (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the crankshaft (57) is equipped with C Type edge (57a) its be corresponding with the described plus a bit of opening of c-type circle (56a) of crank valve (56) and by a positioning Hole or a positioning pin or a positioning sleeve realize cooperation, and fixed with three screws.

The two-stroke LPG that the perfect equal pressure angle logatithmic spiral runner bilayer cooling is eliminated the noise is further improved to draw It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) (56a), the inclined wedge circle (56b) that the c-type circle of the crank valve (56) has the two sides of a bit of opening to be set as oblique angle, the song The central axes for its every side crankshaft of oblique angle that the two sides of a bit of opening of the inclined wedge circle (56b) of the c-type circle of axis valve (56) are equipped with Angle in 5-27.5 degree, when the two sides of a bit of opening of the inclined wedge circle (56b) of the c-type circle have the side at oblique angle with Crankshaft rotation just forms shear flow and slow drop mutation punching in the oral area of the connection crankcase in the scavenging channel of latch-release cylinder The effect hit.

It is further improved and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) (56a), the pressure coil (56f) that the c-type circle of the crank valve (56) has the two sides of a bit of opening to be set as oblique angle, when described The logatithmic spiral side of the two sides of a bit of opening of pressure coil is rotated with crankshaft, the connection in the scavenging channel of latch-release cylinder Pressure angle the logatithmic spiral influence air-flow of properties equivalent and the effect of buffering everywhere are just formed when the oral area of crankcase.

The two-stroke LPG engine that the equal pressure angle logatithmic spiral runner bilayer cooling of brush cutter is eliminated the noise is reformed, there is emission reduction work With strainer (58) is located at beside technique butt strip (55), and separately has strainer (58) to be located under scavenging channel；The filter in scavenging channel Net is to be formed by a plurality of wire of 50 mesh through knitting device, and the strainer in scavenging channel has filtration, is located at scavenging channel Under it is described separately have strainer i.e. sieve and scavenging oral area trimmer valve, double sieve, that is, strainers breathe between gas and crankcase in cylinder There is regulating and controlling effect.It is characterized in that, the innovation is near piston top dead center, compressed piston upper is mixed in cylinder Before closing gas igniting, since piston train of dress portion moves up and open the preparation air entry in latch-release cylinder, the crankshaft below piston The gaseous mixture of sucking fuel and air in case；The pressure of the burning gases of the piston upper generated again due to igniting, piston is from upper Dead point is mobile to bottom dead centre direction and simultaneously closes off air entry, the gaseous mixture in compression crankcase, in the piston of bottom dead center-nearby Above, while the burning gases in cylinder being discharged to outdoor gas from opening and closing exhaust outlet, it is connected by crankcase with cylinder The scavenging access connect, two by preparation scavenging port imported into gaseous mixture from crankcase in piston upper latch-release cylinder in cylinder Stroke motor；The design has the valve gear with crankshaft-synchronous, this valve is the scavenging access from crankcase to cylinder scavenging mouth Crankcase side be configured to it is normally closed；The mixing when valve-closing of the crankcase side of scavenging access, in scavenging access Gas is allowed to burning of igniting by the flame of combustion gas, after HC reduction again from crankcase to scavenging port, the crankcase side of scavenging access It is allowed to be open, while the burning of scavenging access is sent out with gaseous mixture, the gaseous mixture in crankcase is discharged from exhaust outlet Exhaust outlet is closed before, and here it is the two cycle engines for substantially reducing the discharge of HC；It solves in pervious structure, and on The valve of the crankshaft same period is stated because not being designed, if scavenging port is not opened also after the flame extinction of burning gases, combustion gas The flame of body can make the gaseous mixture ignition in scavenging access and crankcase, make gaseous mixture without supplying in normal direction cylinder, exhaust outlet Opening will make the opening of scavenging port cross early stage unlatching, when the exhaust outlet and scavenging port in cylinder are open at the same time, in crankcase And the unblended mixture in scavenging access enters in cylinder from exhaust outlet, so a part of gaseous mixture is in unburned state Under be discharged from exhaust outlet, become discharge gas in gaseous mixture (i.e. HC) increase the problem of；The present invention is in the air-breathing Except mouth exhaust outlet scavenging port, after crankcase scavenging, opening and closing valve, scavenging access have been added in the crankcase side of scavenging access Interior gaseous mixture ignites and burns in the flame of combustion gas, and in scavenging access and crankcase is according to crankshaft synchronizing cycle Valve can be truncated, so the gaseous mixture in crankcase will not burn, while the combustion gas in scavenging access is same with crankshaft When the valve openings of step period, the gaseous mixture in crankcase can be extruded out in cylinder, in exhaust outlet and scavenging port At initial stage when being open simultaneously, the burning gases in scavenging access are fed into cylinder, from exhaust outlet to external discharged row HC will not be adulterated in gas gas, when exhaust outlet will close, continue crankcase in the spent gaseous mixture in scavenging access Interior unblended mixture is fed into cylinder, so the HC amount adulterated in exhaust gas can control reduction；It is described have with The valve gear of crankshaft-synchronous, is on crankshaft (57) plus the c-type circle (56a) of crank valve (56), c-type circle have a bit of opening Two sides be set as the inclined wedge circle (56b) at oblique angle, it is logical in the scavenging of latch-release cylinder when it has the side at oblique angle to rotate with crankshaft Just shearing is formed when the oral area of the connection crankcase in road and reduces the effect of mutation impact；The equal pressure angle logatithmic spiral stream Road bilayer cooling eliminate the noise two-stroke LPG engine, it is further characterized in that, the valve gear having with crankshaft-synchronous, be On crankshaft (57) plus the two sides of a bit of opening of the c-type circle (56a) of crank valve (56) are equipped with the pressure coil (56f) at oblique angle, When the logatithmic spiral side of the two sides of a bit of opening of the pressure coil is rotated with crankshaft, in the scavenging channel of latch-release cylinder Connection crankcase oral area when just form the logatithmic spiral of pressure angle properties equivalent everywhere and influence the effect of air-flow and buffering；It sweeps The wedge (11b) of strainer (58) in gas channel is located at beside the technique butt strip (55)；Beside the technique butt strip (55) Scavenging channel in be equipped with emission reduction catalyst roll up (59), platiniferous rhodium indium iridium, to flow through gas have catalyst effect and noise control filtering adjust Control effect, have the regular hour difference and isolation and noise elimination adjustment effect, slow down exhaust outlet from HC to scavenging channel discharge, from And it is formed in the engine for adding catalyst in scavenging channel；The equal pressure angle logatithmic spiral runner for being further improved perfect brush cutter is double The two-stroke LPG engine that layer cooling is eliminated the noise, which is characterized in that the valve gear having with crankshaft-synchronous is in crankshaft (57) The rotations of upper plus crank valve (56) c-type circles (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed , the scavenging channel of cylinder of the outer diameter of the outer circle of the c-type circle apart from engine 1E45F connection crankcase oral area it Between gap (56 δ) at 0.02-0.07 millimeters；It is further characterized in that the valve gear having with crankshaft-synchronous, be Add the mouth of the rotation of the c-type circle (56a) of crank valve (56) and the connection crankcase in the scavenging channel of latch-release cylinder on crankshaft (57) Portion and formed, the central angle in two sides to the crankshaft center of circle of a bit of opening of the c-type circle is in 82-92 degree.

It is further improved and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws It holds up, which is characterized in that it contains the valve gear with crankshaft-synchronous, is the c-type circle for adding crank valve (56) on crankshaft (57) The rotation of (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, a bit of of c-type circle is opened The central angle in two sides to the crankshaft center of circle of mouth is in 83-89 degree.

It is further improved and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) The rotation of (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the crankshaft (57) is equipped with C Type edge (57a) its be to be matched with described plus crank valve (56) a bit of opening of c-type circle (56a)；Compression ratio is little In 11.

It is further improved and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) The rotation of (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the crankshaft (57) is equipped with C Type edge (57a) its be to be matched with described plus crank valve (56) a bit of opening of c-type circle (56a).

It is further improved and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) The rotation of (56a) and the oral area of the connection crankcase in the scavenging channel of latch-release cylinder and formed, the crankshaft (57) is equipped with C Type edge (57a) its be corresponding with the described plus a bit of opening of c-type circle (56a) of crank valve (56) and by a positioning Hole or a positioning pin or a positioning sleeve realize cooperation, and fixed with three screws.

It is further improved and the two-stroke LPG of the perfect equal pressure angle logatithmic spiral runner bilayer cooling noise elimination draws It holds up, which is characterized in that the valve gear having with crankshaft-synchronous is the c-type circle for adding crank valve (56) on crankshaft (57) (56a), the inclined wedge circle (56b) that the c-type circle of the crank valve (56) has the two sides of a bit of opening to be set as oblique angle, when described The side for having oblique angle of the two sides of a bit of opening of c-type circle is rotated with crankshaft, the connection in the scavenging channel of latch-release cylinder Shear flow is just formed when the oral area of crankcase and reduces the effect of mutation impact.The two of a bit of opening of inclined wedge circle (56b) The angle of the central axes of its every side crankshaft of the oblique angle that side is equipped with is in 5-27.5 degree；Have and crankshaft it is further characterized in that described Synchronous valve gear is the c-type circle (56a) for adding crank valve (56) on crankshaft (57), the c-type circle of the crank valve (56) There are the two sides of a bit of opening to be set as the pressure coil (56f) at oblique angle, when the two sides of a bit of opening of the pressure coil Logatithmic spiral side rotated with crankshaft, just form pressure angle in the oral area of the connection crankcase in the scavenging channel of latch-release cylinder The logatithmic spiral of properties equivalent influences the effect of air-flow and buffering everywhere；It is further characterized in that the filter in the scavenging channel Net (58) is located at beside the technique butt strip (55), the strainer in the scavenging channel be by a plurality of wire through knitting device and At to breathing has filtering regulating and controlling effect between gas and crankcase in cylinder；The wedge (11b) of noise control strainer in scavenging channel is set Beside the technique butt strip (55), the discharge of exhaust outlet of the ingenious HC for slowing down crankcase virgin gas to scavenging channel.

It is new technology being used on brush cutter and grass trimmer by the analysis of Computer Numerical Simulation blade aerodynamic noise.

The method of computer numerical computer aided simulation aerodynamic noise analysis also on probation, with LMS Virtual lab software, It is easy to learn and use, analyzes noise source, obtain noise data and carry out noise reduction；With the method for computer aided animation aerodynamic analysis, The aerodynamic noise analysis of blade when dallying to the rotation output of engine, with CFD (computational fluid Dynamics it) simulates, method is intended to carry out " numerical experiment " by computer, reappears physical process from point of theory；In the hope of Receive the advantages of cost that has of numerical simulation is low, data are easily obtained, analyzed from point of theory problem compared with experiment with And the effect of development with computer and model, calculating cycle are constantly reduced, and calculated result is more and more accurate；To gardens machine Flow field and field of turbulent flow carry out feasibility analysis and data analysis, determine the blade of gardens machine and mowing runner is sound source, to gardens The noise of machine is simulated, and is met reality as far as possible for the simulation of the trend of noise variation, is made every effort to level of noise and experimental error exists 5% or so；Noise source and eddy current crack are set as fluid matasomatism in turbulent boundary layer and interact between blade and fluid micellar Generate and the disengaging of vortex, continuous spectrum random noise be set as the variation of flow regime to outlet flow pattern modulation and outflow fluid with Ambient atmos effect generates, and rotational noise is set as the fluid of blade drive and stator and surrounding fluid effect generate, experimental data Related with noise spectrum and the display noise energy in different frequency region, mower blade rotary air dynamics noise basis frequency meter is calculated public Formula: F=NZ/60, F are noise fundamental frequency, and N is rotating speed of flail, and Z is blade number；Do progress process: geometrical model is established, and is calculated Machine simulation, compares with experimental result, changes structure and is simulated, establishes noise model, experimental verification according to analog result；Way It is to start with from blade geometry and air duct geometry and rotating speed of flail, establishes air duct and blade CAD model, unstrctured grid ICEM Generate, with FLUENT fluid data calculate rotating machinery in fluid calculation MRF model, consider variable velocity field and pressure field and Tubulence energy obtains noise spectrum with LMS Virtual lab software, analyzes noise source, obtains noise data and carrys out noise reduction；Stable state Tentative calculation parameter setting: grid is 4120000 unstrctured grids and dynamic mesh INTERFACE, and turbulence model is RANS (K- EPSILON), blade rotational speed takes 3000 revs/min, and iterative steps take 1000；The trial result has vorticity figure, pressure cloud atlas, speed arrow Spirogram, three-dimensional motion pattern, pressure contour surface figure and planar flow line chart, there are also blade CAD models to generate non-structural net for the trial result Lattice obtain important computations the result is that engine gardens machine knife speed low noise at 5700-7000 revs/min；It is described a kind of to use computer The gardens of the method for numerical value computer aided simulation aerodynamic noise analysis analyzed by Computer Numerical Simulation aerodynamic noise Its rotating speed of flail of machine is 5790 to 6999 turns per minute, with 1E28 to 1E48F type engine.

It continuously improves and two-stroke LPG engine that the cooling of perfect equal pressure angle logatithmic spiral runner bilayer is eliminated the noise, is to drive Dynamic gardens machine；Fuel gas tank is to contain miniature propane fuel tank, miniature propane fuel tank (t20) with LPG fuel gas tank Front be equipped with pipe screw thread, the fuel is entered engine through mixed airgun controller by pipe fitting and is worked, the miniature propane combustion The front of batch can be additionally provided with safety valve so as to it is in excess of the quota when overflow and rise safety effect；The tank diameter of the miniature propane fuel tank It is then 98 millimeters small, it is replaced containing 465 grams of propane fuel by standard.Strainer in scavenging channel is located at by the technique butt strip Side, and the strainer in the scavenging channel is located under scavenging channel；It is as a plurality of wire through double thick made of knitting device Filter combination fine filtering buffers valve chamber, to breathing has filtering regulating and controlling effect between gas and crankcase in cylinder；A plurality of wire is through knitting device Made of double coarse filtration combination fine filterings buffering valve chambers be additionally provided with the catalyst volume of emission reduction, platiniferous, rhodium, indium have catalyst to gas is flowed through Effect slows down pneumatic noise and the discharge of HC.The two-stroke LPG engine that the cooling of equal pressure angle logatithmic spiral runner bilayer is eliminated the noise, Be characterized in: the muffler ASSY (F7) of the hush tube containing catalyst (69) is mounted on described by the silencer pad (F8) On two-stroke LPG engine, the exit of the muffler ASSY (F7) is nearby equipped with the inner outlet of interior metal cap (F7C1) (F7C2), then it is outer, it is equipped with the outer vent (F7j2) and logarithm runner (F7j3) of outer resin cover (F7j1), at a distance convenient for the double-deck drop Temperature is eliminated the noise, and manpower and security are not scalded.

It continuously improves and two cycle engine that the perfect equal pressure angle logatithmic spiral runner bilayer cooling is eliminated the noise, It is characterized in that, the valve gear having with crankshaft-synchronous, is the c-type circle for adding crank valve (56) on crankshaft (57) (56a), the inclined wedge circle (56b) that the c-type circle of the crank valve (56) has the two sides of a bit of opening to be set as oblique angle are described The axis at oblique angle and every side crankshaft that the two sides of a bit of opening of the inclined wedge circle (56b) of the c-type circle of crank valve (56) are equipped with The angle of line is in 15-27 degree, when the side for having oblique angle of the two sides of a bit of opening of the inclined wedge circle (56b) of the c-type circle It is rotated with crankshaft, in the oral area of the connection crankcase in the scavenging channel of latch-release cylinder, just forms shear flow and slow drop mutation The effect of impact.

A kind of further improved engine is additionally provided with strainer i.e. sieve and scavenging oral area buffering in scavenging beneath galleries Valve, double sieve, that is, strainers are to breathing has regulating and controlling effect between gas and crankcase in cylinder；Engine speed is set as 6300 turns per minute It is preferred；Strainer (58) in scavenging channel is the coarse strainer of 60 mesh；And separately having strainer (58) to be located under scavenging channel is 180 mesh Fie screen；The catalyst that a plurality of wire is equipped with emission reduction by strainer made of knitting device rolls up (59), platiniferous, rhodium, indium and dilute Earth elements have catalyst effect and noise control to filter regulating and controlling effect to gas is flowed through；The exhaust gas of engine not direct emission, but first lead to The hush tube containing catalyst (69) is crossed, then by function hush tube (54d), assists the tubule of hush tube (54g), fish scale wedge Then (54e), variable cross-section air hose (54f) noise reduction are run in by the nearly tool bore (28a) of the aluminum pipe more than one meter far from population again It puts；There are regular hour delay difference and isolation and noise elimination and obstructs adjustment effect, the ingenious row for slowing down pneumatic noise and HC It puts；The engine of a kind of further noise reduction, which is characterized in that it contains silica gel damping pad (54a), function hush tube (54d), the tubule for assisting hush tube (54g), fish scale wedge (54e), variable cross-section air hose (54f)；The cylinder of the engine The exhaust outlet connection hush tube containing catalyst (69), then by function hush tube (54d), auxiliary hush tube (54g) tubule, Fish scale wedge (54e), variable cross-section air hose (54f) noise reduction；The hush tube containing catalyst (69) of the exhaust outlet connection of cylinder block (g44) Outgassing direction side is equipped with the silica gel damping pad (54a) and the variable cross-section air hose (54f) equipped with series winding；The variable cross-section The inside of air hose (54f) is equipped with the function hush tube (54d)；The function hush tube (54d) is the series winding at interval, And the song of the range of decrease along the approximate similar odd function with reference to multiple limited sinusoidal wave trains that one third octave is the period Line is axis；Multiple function hush tube (54d) groups are combined into the length and caliber of each hush tube of multistage noise elimination It all changes, sees that the length of each hush tube is shortened in single file and caliber has step by step toward outgassing direction from front to back It is reduced；Each hush tube that multiple function hush tube (54d) groups are combined into multistage noise elimination is equipped with multiple described Fish scale wedge (54e) and the wedge (50d) for having through-hole；The fish scale wedge (54e) is equipped with the small slot of arc and has through-hole Wedge (50d)；The auxiliary hush tube (54g) of the collateral branch of auxiliary is additionally provided on the function hush tube (54d)；Described is auxiliary Helping hush tube (54g) is tubule, and the tubule has the wedge (50d) of through-hole；The variable cross-section air hose (54f) is to become to cut Face, be at least three swell and have at three be reduce；The variable cross-section air hose (54f) be it is curved, at least There is turn at three；The main rotating shaft line for blowing paddle wheel fan and the main rotating shaft line of the Wind Volume turbine (54c) have angle With regard to hindering outflow of the main noise of noise along straight central axes directly forwardly and rearwardly；What the Wind Volume turbine (54c) came out The first function hush tube (54d) and the hush tube that the inside that blowing enters the variable cross-section air hose (54f) is equipped with The small slot of arc and have the first quilt of the wedge (50d) of through-hole that the multiple fish scale wedges (54e) being equipped with are equipped with Compression comes out again and expands first order noise elimination process of just completing, the side for the auxiliary that the function hush tube (54d) is equipped with The tubule of the auxiliary hush tube (54g) of branch is to provide some outlets for air-flow more and all not mixing away from supervisor further to mention High noise elimination effect；The variable cross-section air hose (54f) is variable cross-section, and air-flow is from swollen portion bit stream to diminution position to compression-expansion There is booster action；The variable cross-section air hose (54f) is that curved have turn to have booster action to preventing main noise from directly spreading out of；It is complete At the air-flow of first order noise elimination process come out from first function hush tube (54d), in rising for variable cross-section air hose (54f) It is expanded in big cavity, and through bend, the second function hush tube (54d) all changed subsequently into length and caliber is simultaneously passed through Being compressed again for the small slot of arc and the wedge (50d) that has through-hole of auxiliary hush tube (54g) and fish scale wedge (54e) is swollen It is swollen and complete the second level have make an uproar frequency variation noise elimination process；Complete second level noise elimination process from second function hush tube The air-flow that (54d) comes out, expands, and through bend in the cavity of the swell of the variable cross-section air hose (54f), subsequently into length And the third function hush tube (54d) that all changes of caliber and through the auxiliary hush tube (54g) and fish scale wedge (54e) The small slot of arc and have through-hole wedge (50d) compression-expansion and after completing third level noise elimination process, from the air port of diminution Noise abatement is blown out, is then discharged indirectly by the nearly tool bore (28a) of the aluminum pipe more than one meter far from population again；In engine piston The entrance of piston pin end, should not common pin hole chamfering (d18), the chamfering (d18) of pin hole on engine piston drawing is gone Fall, there is Kong Erwu chamfering, is mounted directly two G type elastic cushions, is zero with regard to rejection rate；Outlet passes through the nearly knife of the aluminum pipe more than one meter again On hole (28a) it is replaceable containing filtering wet fog bottle air filtration layer and far from population and discharge indirectly；The c-type circle of crankshaft it is oblique The angle of angle and every side crankshaft is at 23.5 degree.

With it is a kind of put-put piston pin end simultaneously install two G type elastic cushions automated exchanged cutter positioning mechanism, though energy For producing, but its outstanding problem is high rejection rate.The entrance of the piston pin end of many engine pistons is broken and to send out Motivation piston is scrapped；Tried many schemes, groped several years it is all undesirable, but later with a unexpected method solution , here it is the entrance of the piston pin end in engine piston should not common hole chamfering, be mounted directly two G type elastic cushions just Rejection rate is zero, is used successfully to produce several years, is firmly believed, and the report present invention is now just dared, in the work of engine piston The entrance at plug pin end, should not common hole chamfering, have hole, no chamfering.Reason may be some for having the G type elastic cushion of opening With regard to skew when position contradicts chamfering (d18) of upper pin hole, so that piston is scrapped, no chamfering is all right, but in this way hair The chamfering (d18) of pin hole is removed on motivation piston drawing, who does not expect before, even if presently disclosed this is unable to the rhymed formula of chamfering Key, people may be also recalcitrant, but the entrance of the piston pin end of engine piston should not common hole chamfering, there is Kong Erwu to fall Angle, actual effect are exactly to get well unexpected, and several years without waste product.Exhaust outlet connection catalyst hush tube (69) of cylinder and function disappear Sound pipe (54d), tubule, fish scale wedge (54e), variable cross-section air hose (54f) noise reduction for assisting hush tube (54g)；The function Hush tube (54d) is the series winding at interval, and along it is approximate it is similar with reference to one third octave be the multiple limited of period The curve of the range of decrease of the odd function of Fourier's sine wave train is axis；The entrance of piston pin end should not common pin hole chamfering It is good to be mounted directly two G type elastic cushions.

Engine is related to energy-saving and emission-reduction, in order to pursue Science Explorations, installs two G type bullets simultaneously for engine gudgeon pin end Property pad automated production it is extremely urgent, but do excessively expensive full-automatic high-precision equipment makes enterprise be difficult to hold again The status received, spy disclose the assembly of the elastic cushion of motor-driven carry out piston and crank connecting link, are one kind in put-put piston pin End while the mechanism for installing two G type elastic cushions solve while installing the hard nut to crack that two G type elastic cushions are unable to handle；Because only Be skewed slot is opened on cylinder, therefore dexterously eliminate very much should the very complicated manipulator containing multiple servo-actuated fingers come shifting ground Clamping is not fixed the G type elastic cushion of form, not only simply, and also it is reliable, it is handy.Core technology is the angle of skewed slot.It is for many years Crystallization find out and domestic and foreign experience is practiced, usefulness is to be conducive to the auxiliary guiding of piston to be allowed to good, Assembly precision and product quality are improved, is reduced labor intensity, the popularization and application of high-volume automatic feed equipment are promoted, improves production Benefit.

Piston and crank connecting link are equipped with very big potentiality and can dig.Two are installed simultaneously in put-put piston pin end at present The automated exchanged cutter positioning mechanism and method of G type elastic cushion are also in groping, the assembly of piston and crank connecting link, in put-put Piston pin end is installed two G type elastic cushions simultaneously and is unable to handle；G type elastic cushion is installed in put-put piston pin end, substantially with hand Based on work production model, the left end of operator's piston pin that first installation piston and crank connecting link are connected together by piston pin manually To be stuck in piston deep gouge first G type elastic cushion, then again manually installation piston and crank connecting link by piston pin company To be stuck in piston deep gouge the second G type elastic cushion of the right end of piston pin together；Because G type elastic cushion is elasticity , it is to become outer diameter；The diameter of piston pin is 8mm, and the major diameter of piston deep gouge is 10mm, that is to say, that is major diameter The G type elastic cushion of 10mm is affectedly bashful with hand vice to be compressed to 8mm and pushes into making G type elastic cushion be restored to major diameter again in piston deep gouge 10mm；First G type elastic cushion in the piston deep gouge of the left end of piston pin is installed, the piston that must fill the right end of piston pin is heavy Second G type elastic cushion in slot.Not only labor intensity of workers is big, and production efficiency is low, but also usually because operation was exerted oneself Make G type elastic cushion modification greatly, or because operation exerts oneself too small excessively askew and so that G type elastic cushion is filled improper rather than just arrive Place.With the appearance of recruitment cost increased with recruitment famine, realize that put-put piston pin end installs two G type elastic cushions simultaneously Automated production it is extremely urgent, but do excessively expensive full-automatic high-precision equipment makes enterprise be difficult to bear again； How the assembly of the elastic cushion of motor-driven carry out piston and crank connecting link, seek one kind in put-put piston pin end while installing The mechanism and method of two G type elastic cushions, are one and are related to the hard nut to crack of energy-saving and emission-reduction.

A kind of automated exchanged cutter positioning mechanism for installing two G type elastic cushions simultaneously in put-put piston pin end, by being equipped with Clamping cylinder (g1,1b), main body guide holder (g15), anti-rotation block (g13), the primary push rod (g8), cylinder mounting base of skewed slot (g2) (g16), cylinder (g19), cylinder push plate (g21), main servo-actuated push plate (g20), main servo-actuated pulling block (g22), auxiliary clamp seat (g23), base (g24) is formed, and is symmetrically sequentially arranged on each ground in the two sides at middle part of base or so described Main body guide holder (g15) and cylinder mounting base (g16) and cylinder (g19)；It places at the middle part of the base and connects equipped with crank The piston (g31) of bar and piston pin is equipped with the auxiliary clamp seat (g23) of auxiliary clamp on the top at the middle part of the base； The main body guide holder (g15) close piston side equipped with it is described equipped with skewed slot (g2) clamping cylinder (g1, 1b), the skewed slot (g2) is for being put into G type elastic cushion；In the clamping cylinder (g1,1b) equipped with skewed slot (g2) It is loosely inserted into the primary push rod (g8)；The anti-rotation block (g13) is housed on the main body guide holder (g15)； Push plate (g20) is servo-actuated equipped with the master at the rear portion of the primary push rod (g8)；The movable extension of the cylinder (g19) It is connected with the cylinder push plate (g21)；And the master is servo-actuated pulling block (g22) and is servo-actuated push plate (g20) across the master Gap and be connected with the cylinder push plate (g21).

A kind of high-power brush cutter of low-noise energy-saving, containing the cutter with laser head and disc cutterbar dual-purpose；The brush Machine is using a kind of engine with function hush tube and variable cross-section air hose and the two-stroke alcohol fuel for reequiping G pad；The row of cylinder Port connect catalyst hush tube (69) and function hush tube (54d), the tubule for assisting hush tube (54g), fish scale wedge (54e), Variable cross-section air hose (54f) noise reduction；The function hush tube (54d) is the series winding at interval, and refers to three along approximation is similar / mono- octave is that the curve of the range of decrease of the odd function of multiple limited sinusoidal wave trains in period is axis；It is living in engine The entrance of the piston pin end of plug, should not the chamfering (d18) of common pin hole be mounted directly two G type elastic cushions.From the nozzle of diminution Blowout noise abatement passes through the discharge of the filtering wet fog bottle on the nearly tool bore (28a) of aluminum pipe of the brush cutter more than one meter again；Engine piston The chamfering (d18) of pin hole, which is removed, on drawing is mounted directly two G type elastic cushions；The folder at the oblique angle of the c-type circle of crankshaft and every side crankshaft Angle is at 23.5 degree.

Claims

1. a kind of high-power brush cutter of low-noise energy-saving, which is characterized in that it is containing the cutter with laser head and disc cutterbar dual-purpose； The brush cutter is using a kind of engine with function hush tube and variable cross-section air hose and the two-stroke alcohol fuel for reequiping G pad； The exhaust gas of engine first passes through hush tube containing catalyst (69), then by function hush tube (54d), assists the small of hush tube (54g) Pipe, fish scale wedge (54e), variable cross-section air hose (54f) noise reduction；Contain catalyst described in the exhaust outlet connection of the cylinder of the engine Hush tube (69), then pass through function hush tube (54d), tubule, the fish scale wedge (54e), variable cross-section wind of auxiliary hush tube (54g) Manage (54f) noise reduction；The silica gel that the outgassing direction side of the hush tube containing catalyst (69) of the exhaust outlet connection of cylinder block (g44) is equipped with The variable cross-section air hose (54f) for the series winding that resilient cushion (54a) and one and another mutual interval do not connect；The variable cross-section wind The inside for managing (54f) is equipped with the function hush tube (54d)；The function hush tube (54d) is the series winding at interval, and edge The curve of the range of decrease of the approximate similar odd function with reference to multiple limited sinusoidal wave trains that one third octave is the period be Axis；Described multiple function hush tube (54d) groups are combined into multistage noise elimination, and the length and caliber of each hush tube have Variation sees that the length of each hush tube is shortened in single file and caliber is contracted step by step toward outgassing direction from front to back It is small；The hush tube that multiple function hush tube (54d) groups are combined into multistage noise elimination is equipped with multiple fish scale wedges (54e) and the wedge (50d) for having through-hole；The fish scale wedge (54e) is equipped with the small slot of arc and has the wedge of through-hole (50d)；The auxiliary hush tube (54g) of the collateral branch of auxiliary is additionally provided on the function hush tube (54d)；The auxiliary hush tube (54g) is tubule, and the tubule has the wedge (50d) of through-hole；The variable cross-section air hose (54f) is variable cross-section, Be at least three swell and have at three be reduce；The variable cross-section air hose (54f) be it is curved, turned at least three It is curved；The main rotating shaft line for blowing paddle wheel fan and the main rotating shaft line of the Wind Volume turbine (54c) have angle just to hinder to make an uproar Outflow of the main noise of sound along straight central axes directly forwardly and rearwardly；The blowing that the Wind Volume turbine (54c) comes out enters The first function hush tube (54d) and the hush tube that the inside of the variable cross-section air hose (54f) is equipped with are equipped with The small slot of arc that is equipped with of multiple fish scale wedges (54e) and there is the wedge (50d) of through-hole first to be compressed to go out again Come and expands first order noise elimination process of just completing, the auxiliary of the collateral branch for the auxiliary that the function hush tube (54d) is equipped with The tubule of hush tube (54g) is to provide some outlets for air-flow more and all not mixing away from supervisor to further increase effect of eliminating the noise Fruit；The variable cross-section air hose (54f) is variable cross-section, and air-flow has auxiliary to make compression-expansion from swollen portion bit stream to diminution position With；The variable cross-section air hose (54f) is that curved have turn to have booster action to preventing main noise from directly spreading out of；Complete the first order The air-flow of noise elimination process come out from first function hush tube (54d), in the cavity of the swell of the variable cross-section air hose (54f) In expand, and through bend, the second function hush tube (54d) all changed subsequently into length and caliber and through the auxiliary The small slot of arc of hush tube (54g) and fish scale wedge (54e) and there is the wedge (50d) of through-hole to be completed by compression reflation There is the noise elimination process for frequency variation of making an uproar in the second level；Complete coming out from second function hush tube (54d) for second level noise elimination process Air-flow expands in the cavity of the swell of the variable cross-section air hose (54f), and through bend, has subsequently into length and caliber The third function hush tube (54d) of variation and through it is described auxiliary hush tube (54g) and fish scale wedge (54e) the small slot of arc And have the compression-expansion of the wedge (50d) of through-hole after completing third level noise elimination process, noise abatement is blown out from the nozzle of diminution, then Pass through the filtering wet fog bottle discharge on the nearly tool bore (28a) of the aluminum pipe more than one meter again；Enter in the piston pin end of engine piston Mouthful, should not common pin hole chamfering (d18), the chamfering (d18) of pin hole on engine piston drawing is removed, has Kong Erwu to fall Angle is mounted directly two G type elastic cushions；The angle of the oblique angle of the c-type circle of crankshaft and every side crankshaft is at 23.5 degree.