CN105625146B

CN105625146B - A kind of path formation device of height output moment of torsion low noise

Info

Publication number: CN105625146B
Application number: CN201610042216.3A
Authority: CN
Inventors: 丁克芳; 丁力; 顾亚军; 周涛; 沈彧
Original assignee: SUZHOU HAILING HYDRAULIC MACHINERY Co Ltd
Current assignee: Taizhou Hailing Hydraulic Machinery Co., Ltd.
Priority date: 2016-01-21
Filing date: 2016-01-21
Publication date: 2017-11-07
Anticipated expiration: 2036-01-21
Also published as: CN105625146A

Abstract

The invention discloses a kind of path formation device of height output moment of torsion low noise, the engine being connected including road roller and with road roller, engine is used to drive road roller, engine includes power section, injection system and hydraulic part, hydraulic part includes compression chamber, pump chamber, return chamber and hydraulic circuit, compression chamber is arranged at the rear portion of engine, it is being provided with the first hydraulic fluid port, second hydraulic fluid port, first hydraulic fluid port, second hydraulic fluid port is connected by the first control valve and the second control valve with compression accumulator respectively, pump chamber is connected with low pressure oil way and high-pressure oil passage respectively by check valve, low pressure oil way is with being above provided with return control valve and low pressure accumulator；High pressure accumulator is provided with trigger valve to being provided with pressure-reducing valve, the oil pipe line between compression accumulator and the high pressure accumulator on the oil pipe line of cylinder body.The path formation apparatus structure is simple, easily manufactured, scavenging efficiency is high, performance is stable, output torque is big, and devises complete control system and position detecting system.

Description

A kind of path formation device of height output moment of torsion low noise

Technical field

The present invention relates to road construction field, and in particular to a kind of path formation device of height output moment of torsion low noise.

Background technology

Path formation device, refers mainly to road roller, and the category of road furniture is belonged in engineering machinery, is widely used in high The embankment compacting operation of the Larger Engineering Projects such as level highway, railway, airfield runway, dam, stadium, can roll sand, half Viscosity and clayed soil, subgrade stability soil and asphalt concrete pavement layer.

How further to reduce path formation device, mainly the operating power consumption of road roller and improve efficiency, be people one Straight concern.Present road roller, is substantially and uses engine driving, and existing engine generally existing structure is excessively The problems such as complicated, control is not enough precisely, output torque is not enough, therefore we can set about the smooth dress of road improvement in terms of this The performance put.

The content of the invention

In view of the above-mentioned problems, the present invention provides a kind of compact conformation, accurate control, performance stabilization and the big road of output torque Road flattening device.

The purpose of the present invention is realized using following technical scheme：

A kind of path formation device of height output moment of torsion low noise, including road roller and the engine that is connected with road roller, Engine is used to drive road roller, it is characterized in that, engine includes power section, injection system and hydraulic part, and described is dynamic Power part includes breather check valve, power piston, combustion chamber, fuel injector, scavenging port, and hydraulic part includes compression chamber, pump chamber, returned Position chamber and hydraulic circuit, the compression chamber are arranged at the rear portion of engine, are being provided with the first hydraulic fluid port, the second hydraulic fluid port, First hydraulic fluid port, the second hydraulic fluid port are connected by the first control valve and the second control valve with compression accumulator respectively, the pump chamber Be connected respectively with low pressure oil way and high-pressure oil passage by low pressure oil way check valve and high-pressure oil passage check valve, high-pressure oil passage be used for It is provided with to bypass in return control valve and low pressure accumulator, return control valve on engine loading fuel feeding, low pressure oil way and is provided with Return check valve；The return chamber is directly connected to high pressure accumulator, is set on the oil pipe line of the high pressure accumulator to cylinder body Be equipped with pressure-reducing valve, state of starting operating and catch fire operating mode when pressure-reducing valve keep it turned on, pressure-reducing valve is closed during nominal situation；The compression stores Energy device is connected with high pressure accumulator by oil pipe line, and is set on the oil pipe line between the compression accumulator and high pressure accumulator Trigger valve is equipped with, the compression ratio of engine is improved during for start operating performance, trigger valve is closed during nominal situation；The high-pressure oil passage It is connected with to lead to after a load accumulator, pressure-reducing valve and is connected all the way with the compression accumulator；The end of engine is provided with Full of the pressure oil being previously implanted in hydraulic pressure sacculus, hydraulic pressure sacculus, its bottom is connected by oil pipe line with low pressure accumulator, hydraulic pressure Spring loaded safety valve is additionally provided between sacculus and low pressure accumulator；The upper left side of the hydraulic pressure sacculus is provided with inclined dead band Hydraulic fluid port, straight line and hydraulic pressure sacculus are tangent where it, and dead band hydraulic fluid port and compression accumulator are returned by the dead band being arranged between Position magnetic valve is connected, in operating mode of catching fire, when the end of piston component is in the dead zone location between the second hydraulic fluid port and hydraulic pressure sacculus When, by opening the preferable lower dead center region that dead band return magnetic valve makes piston component return between the second hydraulic fluid port and the first hydraulic fluid port To start next stroke；The injection system is high-pressure co-rail electric-controlling injection system, including high-pressure oil pump, common rail pipe, electricity Fuel injector, pressure sensor and electronic control unit are controlled, when engine works, in the presence of oil transfer pump, fuel oil is through filtering Clear device enters high-pressure oil pump, and after the compression of high-pressure oil pump, low pressure oil is changed into hydraulic oil, and inputs common rail by high-pressure oil pump Pipe, in common rail pipe, electronic control unit receives the feedback of pressure sensor and controls pressure limiting valve, with pressure value in buffer rail simultaneously Make its holding constant, then input hydraulic oil in electric-controlled fuel injector, wait the oil spout instruction of electronic control unit；

The engine also includes position detecting system, and position detecting system passes through Linear displacement transducer and location triggered Sensor detects and sends signal when piston component reaches top dead center position, bottom dead center position and feed forward position, feed forward position Close to the side of top dead center position between top dead center position and bottom dead center position, during for start operating performance piston compression stroke The closing of the first control valve is controlled, feed forward position is determined according to the velocity amplitude cooperation position detecting system of piston；The engine Also include constant-voltage driving system, the constant-voltage driving system includes engine and hydraulic variable motor, passes through motor drive power square The constant of output oil liquid pressure is kept with load resistance square；Hydraulic variable motor is driven by output high-voltage oil liquid, and by slowing down Device couples with load, and its discharge capacity is automatically adjusted with the change of operating pressure；

The engine also includes start control system, normal work control system and fire controll system：

Start control system, the control for engine state of starting operating：After start signal is sent, it is on valve and subtracts Pressure valve, compression accumulator with high pressure accumulator due to being connected and pressure rise, and the compression ratio of engine is improved；Engine control Unit processed is detected to the signal of displacement transducer, if testing result shows that piston component is in lower dead center, by first Control valve and the second control valve are opened, and piston component starts compression travel, if detecting work in the presence of compression accumulator Plug assembly is first turned on return control valve not in lower dead center, and the hydraulic oil in pump chamber and compression chamber is released by low pressure oil way, made Piston component is returned to bottom dead center position in the presence of high pressure accumulator pressure, closes return control valve, then start compressed line Journey；When piston reaches feed forward position, the second control valve is closed, and when piston reaches after top dead center, the first control valve is closed, return Control valve is opened, and piston component comes back to after bottom dead center, closes return control valve, and piston component completes a working cycles, The pressure and temperature value in cylinder when piston component reaches top dead centre is recorded during this, when frequency valve open signal is sent again, Judge whether the cylinder pressure and temperature of a upper cycle index meet diesel-fuel ignition condition, if in-cylinder pressure and temperature are unsatisfactory for Fiery condition, then repeat the above-described course of work, until pressure and temperature is met after ignition condition, initially enters normal work Control process；

Normal work control system, the control for engine nominal situation：Into after nominal situation, close trigger valve and Pressure-reducing valve, the first control valve maintains a normally open state, after start signal is sent, and the second control valve is opened, in compression accumulator Hydraulic oil enters compression chamber by the second control valve first, promotes piston component to be moved to top dead centre, after the first hydraulic fluid port is opened, Second control valve is closed, and is connected between compression chamber and compression accumulator by the first hydraulic fluid port, when piston component reaches oil spout position, Trigger sensor, produces fuel injection signal, and control distributive value so that the ratio between compression time and Bulking Time are equal to hydraulic pump two The ratio between volume change of stroke, so that expansion flow is equal with compression flow, to reduce the pulsation of engine output flow, by Injection system completes fuel injection process, and near top dead center, fuel combustion heat release, piston component is in the presence of cylinder pressure Lower dead center is returned to, and it is stable in lower dead center before the second control valve is again turned on；

Fire controll system, the control for engine fire operating mode：In engine working process, when start signal hair After going out, one-time detection all is carried out to piston component position, if engine frequencies and frequency change rate are respectively less than setting value, examined The position of piston component is surveyed, if piston component is not in bottom dead center position, and cylinder temperature cylinder pressure is less than value of catching fire, then it is assumed that engine Caught fire in being circulated upper one, be now first shut off the first control valve, and open pressure-reducing valve and return control valve, make piston group Part is returned to bottom dead center position, and then the first control valve is opened, and waits next start dialing signal, engine is according still further to normal Working cycles are moved.

Beneficial effects of the present invention are：1st, hydraulic system can be to load fuel feeding in compression and expansion process, and can have Imitate the oily phenomenon of string pressure string that should not occur between anti-locking system；Coordinate each accumulator to reduce output flow pulsation, lower and make an uproar Sound；For the operation characteristic of each operating mode engine, devise new control system, can more precisely, efficiently control engine Operation；2nd, feed forward position is added between top dead centre and lower dead center, feed forward position is reached in start operating performance lower piston component When be shut off frequency valve, reach after top dead center turn off switch valve, so both ensure that the speed of compression travel, reduced again The resistance of expansion stroke, improves the operating efficiency of engine and reduces journey time on the whole；3rd, by controlling high-voltage energy-storage Trigger valve between device and compression accumulator, to increase the compression ratio of engine, and will not impact hair to output oil pressure Trigger valve is closed after raw hydro pulse, nominal situation, the method for replacing traditional petrol station system to heighten compression ratio, with economic real The characteristics of using simple in construction；4th, the precise degrees of judgement of catching fire are opened by mistake and improved in order to avoid return control valve, take cylinder The position of warm cylinder pressure and piston component is as the main basis for estimation caught fire, while the retardance declined in view of cylinder temperature, adds frequency The feed-forward signal of rate and frequency variation rate (or change in displacement rate), i.e., first determination frequency and frequency change rate are less than setting Whether value, then judge piston in bottom dead center position, if it was not then opening return control valve again；5th, new hydraulic pressure is devised Balloon buffer unit and its attached overpressure prevention device, can also be to engine while buffering and superpressure preventing function is played Certain supplementary function is played in hydraulic slip；6th, by the setting of dead band hydraulic fluid port and dead band return magnetic valve, can effectively it solve Piston component is difficult to return to the problem of lower dead center starts next stroke in dead zone location, while setting to subtract by tangent hydraulic fluid port The wriggling time that few piston component enters behind dead band, further improve the whole efficiency of engine.

Brief description of the drawings

Using accompanying drawing, the invention will be further described, but the embodiment in accompanying drawing does not constitute any limit to the present invention System, for one of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to the following drawings Other accompanying drawings.

Fig. 1 is the structural representation of the path formation device engine；

Fig. 2 is the structural representation of injection system；

Fig. 3 is the position view in preferable lower dead center region and dead band.

Reference：1- compression chambers；The control valves of 2- second；The control valves of 3- first；4- compression accumulators；The hydraulic fluid ports of 5- first； The hydraulic fluid ports of 6- second；7- pump chambers；8- high pressure accumulators；9- breather check valves；10- power pistons；11- combustion chambers；12- fuel injectors； 13- scavenging ports；14- return chambers；15- resetting pistons；17- return control valves；18- low pressure accumulators；19- compression pistons；21- is returned Oily check valve；22- pressure-reducing valves；23- trigger valves；24- loads accumulator；25- high-pressure oil passages；26- low pressure oil ways；27- hydraulic pressure balls Capsule；28- spring loaded safety valves；29- oil transfer pumps；30- cleaners；31- high-pressure oil pumps；32- common rail pipes；33- electric-controlled fuel injectors； 34- dead bands hydraulic fluid port；35- dead bands return magnetic valve；36- low pressure oil way check valves；37- high-pressure oil passage check valves；A- ideally stops Point region；B- dead bands.

Embodiment

The invention will be further described with the following Examples.

Embodiment 1：A kind of path formation device of height output moment of torsion low noise as Figure 1-3, including road roller and The engine being connected with road roller, engine is used to drive road roller, and engine includes power section, injection system and hydraulic section Point, described power section includes breather check valve 9, power piston 10, combustion chamber 11, fuel injector 12, scavenging port 13, return work Plug 15, compression piston 19, hydraulic part include compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, and the compression chamber 1 is set The rear portion of engine is placed in, the first hydraulic fluid port 5, the second hydraulic fluid port 6 is being provided with, first hydraulic fluid port 5, the second hydraulic fluid port 6 are distinguished It is connected by the first control valve 3 and the second control valve 2 with compression accumulator 4, the pump chamber 7 passes through low pressure oil way check valve respectively 36 and high-pressure oil passage check valve 37 be connected respectively with low pressure oil way 26 and high-pressure oil passage 25, high-pressure oil passage 25 is used for negative to engine Carry and also bypass setting is provided with return control valve 17 and low pressure accumulator 18, return control valve 17 on fuel feeding, low pressure oil way 26 There is return check valve 21；The return chamber 14 is directly connected to high pressure accumulator 8, and the oil of cylinder body is arrived in the high pressure accumulator 8 Pressure-reducing valve 22 is provided with pipeline；The compression accumulator 4 is connected with the high pressure accumulator 8 by oil pipe line, the pressure Trigger valve 23 is additionally provided with oil pipe line between contracting accumulator 4 and the high pressure accumulator 8；The high-pressure oil passage 25 is connected with Lead to and be connected all the way with the compression accumulator 4 after one load accumulator 24, the pressure-reducing valve 22；The injection system is height Press common rail electric-controlling injection system.

The end of engine is provided with the pressure full of the certain pressure being previously implanted in hydraulic pressure sacculus 27, hydraulic pressure sacculus 27 Oil, its bottom is connected by oil pipe line with low pressure accumulator 18, when load pressure is reduced or distributive value overshoot causes piston suddenly When crossing the second hydraulic fluid port 6 with larger speed, hydraulic pressure sacculus 27 can play good cushioning effect, and will not produce bounce-back substantially Effect；Simultaneously in order to prevent the overpressure failure of hydraulic pressure sacculus 27, spring is additionally provided between hydraulic pressure sacculus 27 and low pressure accumulator 18 Formula safety valve 28, once the superpressure spring loaded safety valve 28 of hydraulic pressure sacculus 27 will be automatically opened up, and it is slow by low pressure accumulator 18 Stamping press, the at this moment meeting of hydraulic pressure sacculus 27 play certain supplementary function to the hydraulic system of engine.The hydraulic pressure sacculus 27 Upper left side is provided with inclined dead band hydraulic fluid port 34, and straight line and hydraulic pressure sacculus 27 are tangent where it, dead band hydraulic fluid port 34 and compress energy storage Device 4 is connected by the dead band return magnetic valve 35 that is arranged between, in operating mode of catching fire, when the end of piston component is in the During dead band B between two hydraulic fluid ports 6 and hydraulic pressure sacculus 27, piston component is set to return to the second oil by opening dead band return magnetic valve 35 Mouthfuls 6 and the first preferable lower dead center region A between hydraulic fluid port 5 is to start next stroke.

The effect of high pressure accumulator 8 is：One is ensure that when engine is shut down, and piston component can be rested on down only Point position, reduces and wriggles；Two be under engine state of starting operating and catch fire situation occur when, promote piston component be returned to down Dead-centre position, enables the engine to continue to start next circulation.

The engine also includes position detecting system, and the position detecting system is touched by Linear displacement transducer and position Signal when sensor detection piston component reaches top dead center position, bottom dead center position and feed forward position is sent out, feed forward position is located at Close to the side of top dead center position between top dead center position and bottom dead center position, controlled during for start operating performance piston compression stroke The closing of first control valve 3, feed forward position is determined according to the velocity amplitude cooperation position detecting system of piston.

The injection system includes high-pressure oil pump 31, common rail pipe 32, electric-controlled fuel injector 33, pressure sensor and electronics control Unit processed, when engine works, in the presence of oil transfer pump 29, fuel oil enters high-pressure oil pump 31 through cleaner 30, through too high After the compression of pressure oil pump 31, low pressure oil is changed into hydraulic oil, and inputs common rail pipe 32 by high-pressure oil pump 31, in common rail pipe 32, electricity The feedback that sub-control unit receives pressure sensor simultaneously controls pressure limiting valve, with pressure value in buffer rail and makes its holding constant, with The hydraulic oil stablized relatively and have certain pressure is inputted in electric-controlled fuel injector 33 afterwards, waits the oil spout of electronic control unit to refer to Order.

The engine is additionally provided with constant-voltage driving system, and the constant-voltage driving system mainly includes engine and hydraulic variable flow Motor, by motor drive power square and load resistance square, maintains the constant of output oil liquid pressure.Hydraulic variable motor is by exporting High-voltage oil liquid is driven, and is coupled by deceleration device with load, and its discharge capacity is automatically adjusted with the change of operating pressure.Hydraulic pressure becomes Amount motor is connected with load machinery, and both rotating speeds are equal；In the case of steady operation, motor drive power square and load resistance square are big Small equal, in the opposite direction, when resistance change is big, motor drive power square is less than load resistance square, reduces motor rotary speed.Due to defeated The flow for going out hydraulic oil is constant, and output hydraulic pressure oil flow resistance in the case where back pressure increases increases, so as to cause system internal pressure The rise of power.Now, the stroking mechanism of hydraulic motor receives the feedback of the pressure rise signal and is adjusted, and makes itself to arrange Amount increase, increases the flow of motor in the case where rotating speed is reduced, so as to reduce fluid flow resistance, maintains engine defeated Go out the constant of oil liquid pressure.Simultaneously as discharge capacity increases, motor drive power square also increases therewith, and gradually with load resistance square Balance each other, system is realized again reaches steady-working state.Equally, when load resistance reduces, fluid motor-driven torque is more than During load resistance square, motor rotary speed rise causes the reduction of pressure in hydraulic system.Now, hydraulic variable motor discharge capacity is to subtracting Small direction regulation, makes driving moment be balanced each other with load resistance square, while system steady operation is realized in holding system Pressure it is constant.

Start control system, the control for engine state of starting operating：After start signal is sent, the He of valve 23 is on Pressure-reducing valve 22, compression accumulator 4 with high pressure accumulator 8 due to being connected and pressure rise, and the compression ratio of engine is improved；Hair Motivation control unit is detected to the signal of displacement transducer, if testing result shows that piston component is in lower dead center, First control valve 3 and the second control valve 2 are opened, piston component starts compression travel, such as in the presence of compression accumulator 4 Fruit detect piston component not in lower dead center, be first turned on return control valve 17, by the hydraulic oil in pump chamber 7 and compression chamber 1 by Low pressure oil way 26 is released, and piston component is returned to bottom dead center position in the presence of the pressure of high pressure accumulator 8, closes return control Valve 17 processed, then start compression travel；When the speed of piston is decreased to a certain setting value, it is believed that it reaches feed forward position, now Second control valve 2 is closed, when piston reaches after top dead center, the first control valve 3 is closed, and return control valve 17 is opened, this to incite somebody to action The control mode that first control valve 3 and the second control valve 2 are closed step by step, both ensure that the speed of compression travel, had reduced again swollen The resistance of swollen stroke；Piston component comes back to after bottom dead center, closes return control valve 17, and piston component completes a job and followed Ring, should during record piston component reach top dead centre when cylinder in pressure and temperature value, when the open signal of the second control valve 2 again It is secondary to send, judge whether the cylinder pressure and temperature of a upper cycle index meet diesel-fuel ignition condition, if in-cylinder pressure and temperature It is all relatively low, then the above-described course of work is repeated, until pressure and temperature is met after ignition condition, normal work is initially entered Control process.

Normal work control system, the control for engine nominal situation：Into after nominal situation, trigger valve 23 is closed With pressure-reducing valve 22, the first control valve 3 maintains a normally open state, after start signal is sent, and the second control valve 2 is opened, compress energy storage Hydraulic oil in device 4 enters compression chamber 1 by the second control valve 2 first, promotes piston component to be moved to top dead centre, when the first oil After mouth 5 is opened, the second control valve 2 is closed, and is connected between compression chamber 1 and compression accumulator 4 by the first hydraulic fluid port 5, is worked as piston component When reaching oil spout position, trigger sensor produces fuel injection signal, and control distributive value so that the ratio between compression time and Bulking Time The ratio between volume change equal to two strokes of hydraulic pump, so that expansion flow and compression flow are of substantially equal, to reduce hair Motivation output flow is pulsed, and fuel injection process is completed by injection system, near top dead center, fuel combustion heat release, piston group Part returns to lower dead center in the presence of cylinder pressure, and stable in lower dead center before the second control valve 2 is again turned on.

Fire controll system, the control for engine fire operating mode：In engine working process, when start signal hair After going out, one-time detection all is carried out to piston component position, if engine frequencies and frequency change rate are respectively less than setting value, examined The position of piston component is surveyed, if piston component is not in bottom dead center position, and cylinder temperature cylinder pressure is less than value of catching fire, then it is assumed that engine Caught fire in being circulated upper one, be now first shut off the first control valve 3, and open pressure-reducing valve 22 and return control valve 17, made Piston component is returned to bottom dead center position, and then the first control valve 3 is opened, and waits next start dialing signal, engine is again Moved according to normal operating cycle.

Second control valve 2 uses maximum stream flow for 250L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 10ms, Electrohydraulic servo valve is that one kind receives analog quantity electric control signal, and output is with electric control signal size and change in polarity and quick sound The hydraulic control valve answered, with quick dynamic response and good static characteristic, such as：High resolution, stagnant ring are small, the linearity is good Deng.The maximum stream flow of second control valve 2, when using maximum stream flow be 250L/min, open pulsewidth be 10ms electrohydraulic servo valve When, the acceleration segment length of piston component can increase to original 5 times or so, and the time used in compression travel is obviously reduced, so that The period of motion than is originally reduced nearly 7ms, significantly improve the maximum operation frequency of engine, achieve unexpected Effect.

Embodiment 2：A kind of path formation device of height output moment of torsion low noise as Figure 1-3, including road roller and The engine being connected with road roller, engine is used to drive road roller, and engine includes power section, injection system and hydraulic section Point, described power section includes breather check valve 9, power piston 10, combustion chamber 11, fuel injector 12, scavenging port 13, return work Plug 15, compression piston 19, hydraulic part include compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, and the compression chamber 1 is set The rear portion of engine is placed in, the first hydraulic fluid port 5, the second hydraulic fluid port 6 is being provided with, first hydraulic fluid port 5, the second hydraulic fluid port 6 are distinguished It is connected by the first control valve 3 and the second control valve 2 with compression accumulator 4, the pump chamber 7 passes through low pressure oil way check valve respectively 36 and high-pressure oil passage check valve 37 be connected respectively with low pressure oil way 26 and high-pressure oil passage 25, high-pressure oil passage 25 is used for negative to engine Carry and also bypass setting is provided with return control valve 17 and low pressure accumulator 18, return control valve 17 on fuel feeding, low pressure oil way 26 There is return check valve 21；The return chamber 14 is directly connected to high pressure accumulator 8, and the oil of cylinder body is arrived in the high pressure accumulator 8 Pressure-reducing valve 22 is provided with pipeline；The compression accumulator 4 is connected with the high pressure accumulator 8 by oil pipe line, the pressure Trigger valve 23 is additionally provided with oil pipe line between contracting accumulator 4 and the high pressure accumulator 8；The high-pressure oil passage 25 is connected with Lead to and be connected all the way with the compression accumulator 4 after one load accumulator 24, the pressure-reducing valve 22；The injection system is height Press common rail electric-controlling injection system.

Second control valve 2 uses maximum stream flow for 200L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 15ms, Electrohydraulic servo valve is that one kind receives analog quantity electric control signal, and output is with electric control signal size and change in polarity and quick sound The hydraulic control valve answered, with quick dynamic response and good static characteristic, such as：High resolution, stagnant ring are small, the linearity is good Deng.The maximum stream flow of second control valve 2, when using maximum stream flow be 200L/min, open pulsewidth be 15ms electrohydraulic servo valve When, the acceleration segment length of piston component can increase to original 6 times or so, and the time used in compression travel is obviously reduced, so that The period of motion than is originally reduced nearly 10ms, significantly improve the maximum operation frequency of engine, achieve and expect not The effect arrived.

Embodiment 3：A kind of path formation device of height output moment of torsion low noise as Figure 1-3, including road roller and The engine being connected with road roller, engine is used to drive road roller, and engine includes power section, injection system and hydraulic section Point, described power section includes breather check valve 9, power piston 10, combustion chamber 11, fuel injector 12, scavenging port 13, return work Plug 15, compression piston 19, hydraulic part include compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, and the compression chamber 1 is set The rear portion of engine is placed in, the first hydraulic fluid port 5, the second hydraulic fluid port 6 is being provided with, first hydraulic fluid port 5, the second hydraulic fluid port 6 are distinguished It is connected by the first control valve 3 and the second control valve 2 with compression accumulator 4, the pump chamber 7 passes through low pressure oil way check valve respectively 36 and high-pressure oil passage check valve 37 be connected respectively with low pressure oil way 26 and high-pressure oil passage 25, high-pressure oil passage 25 is used for negative to engine Carry and also bypass setting is provided with return control valve 17 and low pressure accumulator 18, return control valve 17 on fuel feeding, low pressure oil way 26 There is return check valve 21；The return chamber 14 is directly connected to high pressure accumulator 8, and the oil of cylinder body is arrived in the high pressure accumulator 8 Pressure-reducing valve 22 is provided with pipeline；The compression accumulator 4 is connected with the high pressure accumulator 8 by oil pipe line, the pressure Trigger valve 23 is additionally provided with oil pipe line between contracting accumulator 4 and the high pressure accumulator 8；The high-pressure oil passage 25 is connected with Lead to and be connected all the way with the compression accumulator 4 after one load accumulator 24, the pressure-reducing valve 22；The injection system is height Press common rail electric-controlling injection system.

Second control valve 2 uses maximum stream flow for 220L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 20ms, Electrohydraulic servo valve is that one kind receives analog quantity electric control signal, and output is with electric control signal size and change in polarity and quick sound The hydraulic control valve answered, with quick dynamic response and good static characteristic, such as：High resolution, stagnant ring are small, the linearity is good Deng.The maximum stream flow of second control valve 2, when using maximum stream flow be 220L/min, open pulsewidth be 20ms electrohydraulic servo valve When, the acceleration segment length of piston component can increase to original 7 times or so, and the time used in compression travel is obviously reduced, so that The period of motion than is originally reduced nearly 12ms, significantly improve the maximum operation frequency of engine, achieve and expect not The effect arrived.

Embodiment 4：A kind of path formation device of height output moment of torsion low noise as Figure 1-3, including road roller and The engine being connected with road roller, engine is used to drive road roller, and engine includes power section, injection system and hydraulic section Point, described power section includes breather check valve 9, power piston 10, combustion chamber 11, fuel injector 12, scavenging port 13, return work Plug 15, compression piston 19, hydraulic part include compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, and the compression chamber 1 is set The rear portion of engine is placed in, the first hydraulic fluid port 5, the second hydraulic fluid port 6 is being provided with, first hydraulic fluid port 5, the second hydraulic fluid port 6 are distinguished It is connected by the first control valve 3 and the second control valve 2 with compression accumulator 4, the pump chamber 7 passes through low pressure oil way check valve respectively 36 and high-pressure oil passage check valve 37 be connected respectively with low pressure oil way 26 and high-pressure oil passage 25, high-pressure oil passage 25 is used for negative to engine Carry and also bypass setting is provided with return control valve 17 and low pressure accumulator 18, return control valve 17 on fuel feeding, low pressure oil way 26 There is return check valve 21；The return chamber 14 is directly connected to high pressure accumulator 8, and the oil of cylinder body is arrived in the high pressure accumulator 8 Pressure-reducing valve 22 is provided with pipeline；The compression accumulator 4 is connected with the high pressure accumulator 8 by oil pipe line, the pressure Trigger valve 23 is additionally provided with oil pipe line between contracting accumulator 4 and the high pressure accumulator 8；The high-pressure oil passage 25 is connected with Lead to and be connected all the way with the compression accumulator 4 after one load accumulator 24, the pressure-reducing valve 22；The injection system is height Press common rail electric-controlling injection system.

Second control valve 2 uses maximum stream flow for 270L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 25ms, Electrohydraulic servo valve is that one kind receives analog quantity electric control signal, and output is with electric control signal size and change in polarity and quick sound The hydraulic control valve answered, with quick dynamic response and good static characteristic, such as：High resolution, stagnant ring are small, the linearity is good Deng.The maximum stream flow of second control valve 2, when using maximum stream flow be 270L/min, open pulsewidth be 25ms electrohydraulic servo valve When, the acceleration segment length of piston component can increase to original 7.5 times or so, and the time used in compression travel is obviously reduced, from And the period of motion than is originally reduced nearly 12ms, the maximum operation frequency of engine is significantly improved, is achieved imaginary Less than effect.

Embodiment 5：A kind of path formation device of height output moment of torsion low noise as Figure 1-3, including road roller and The engine being connected with road roller, engine is used to drive road roller, and engine includes power section, injection system and hydraulic section Point, described power section includes breather check valve 9, power piston 10, combustion chamber 11, fuel injector 12, scavenging port 13, return work Plug 15, compression piston 19, hydraulic part include compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, and the compression chamber 1 is set The rear portion of engine is placed in, the first hydraulic fluid port 5, the second hydraulic fluid port 6 is being provided with, first hydraulic fluid port 5, the second hydraulic fluid port 6 are distinguished It is connected by the first control valve 3 and the second control valve 2 with compression accumulator 4, the pump chamber 7 passes through low pressure oil way check valve respectively 36 and high-pressure oil passage check valve 37 be connected respectively with low pressure oil way 26 and high-pressure oil passage 25, high-pressure oil passage 25 is used for negative to engine Carry and also bypass setting is provided with return control valve 17 and low pressure accumulator 18, return control valve 17 on fuel feeding, low pressure oil way 26 There is return check valve 21；The return chamber 14 is directly connected to high pressure accumulator 8, and the oil of cylinder body is arrived in the high pressure accumulator 8 Pressure-reducing valve 22 is provided with pipeline；The compression accumulator 4 is connected with the high pressure accumulator 8 by oil pipe line, the pressure Trigger valve 23 is additionally provided with oil pipe line between contracting accumulator 4 and the high pressure accumulator 8；The high-pressure oil passage 25 is connected with Lead to and be connected all the way with the compression accumulator 4 after one load accumulator 24, the pressure-reducing valve 22；The injection system is height Press common rail electric-controlling injection system.

Second control valve 2 uses maximum stream flow for 230L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 30ms, Electrohydraulic servo valve is that one kind receives analog quantity electric control signal, and output is with electric control signal size and change in polarity and quick sound The hydraulic control valve answered, with quick dynamic response and good static characteristic, such as：High resolution, stagnant ring are small, the linearity is good Deng.The maximum stream flow of second control valve 2, when using maximum stream flow be 230L/min, open pulsewidth be 30ms electrohydraulic servo valve When, the acceleration segment length of piston component can increase to original 8 times or so, and the time used in compression travel is obviously reduced, so that The period of motion than is originally reduced nearly 14ms, significantly improve the maximum operation frequency of engine, achieve and expect not The effect arrived.

Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than to present invention guarantor The limitation of scope is protected, although being explained with reference to preferred embodiment to the present invention, one of ordinary skill in the art should Work as understanding, technical scheme can be modified or equivalent substitution, without departing from the reality of technical solution of the present invention Matter and scope.

Claims

1. a kind of path formation device of height output moment of torsion low noise, including road roller and the engine that is connected with road roller, hair Motivation is used to drive road roller, it is characterized in that, engine includes power section, injection system and hydraulic part, described power Part includes breather check valve, power piston, combustion chamber, fuel injector, scavenging port, and hydraulic part includes compression chamber, pump chamber, return Chamber and hydraulic circuit, the compression chamber are arranged at the rear portion of engine, are being provided with the first hydraulic fluid port, the second hydraulic fluid port, institute State the first hydraulic fluid port, the second hydraulic fluid port respectively by the first control valve and the second control valve with compression accumulator to be connected, the pump chamber leads to Cross low pressure oil way check valve and high-pressure oil passage check valve respectively with low pressure oil way and high-pressure oil passage to be connected, high-pressure oil passage is used for hair Motivation is loaded to be provided with to bypass in return control valve and low pressure accumulator, return control valve on fuel feeding, low pressure oil way and is provided with back Oily check valve；The return chamber is directly connected to high pressure accumulator, is set on the oil pipe line of the high pressure accumulator to cylinder body Have a pressure-reducing valve, state of starting operating and catch fire operating mode when pressure-reducing valve keep it turned on, pressure-reducing valve is closed during nominal situation；The compress energy storage Device is connected with high pressure accumulator by oil pipe line, and is set on the oil pipe line between the compression accumulator and high pressure accumulator There is trigger valve, the compression ratio of engine is improved during for start operating performance, trigger valve is closed during nominal situation；The high-pressure oil passage connects It is connected to lead to after a load accumulator, pressure-reducing valve and is connected all the way with the compression accumulator；The end of engine is provided with liquid Full of the pressure oil being previously implanted in pressure ball capsule, hydraulic pressure sacculus, its bottom is connected by oil pipe line with low pressure accumulator, hydraulic pressure ball Spring loaded safety valve is additionally provided between capsule and low pressure accumulator；The upper left side of the hydraulic pressure sacculus is provided with inclined dead band oil Mouthful, straight line where it and hydraulic pressure sacculus are tangent, and dead band hydraulic fluid port and compression accumulator pass through the dead band return that is arranged between Magnetic valve is connected, in operating mode of catching fire, when the end of piston component is in the dead zone location between the second hydraulic fluid port and hydraulic pressure sacculus, By open dead band return magnetic valve make the preferable lower dead center region that piston component is returned between the second hydraulic fluid port and the first hydraulic fluid port with Start next stroke；The injection system is high-pressure co-rail electric-controlling injection system, including high-pressure oil pump, common rail pipe, automatically controlled Fuel injector, pressure sensor and electronic control unit, when engine works, in the presence of oil transfer pump, fuel oil passes through filtering Device enters high-pressure oil pump, after the compression of high-pressure oil pump, and low pressure oil is changed into hydraulic oil, and inputs common rail pipe by high-pressure oil pump, In common rail pipe, the feedback that electronic control unit receives pressure sensor simultaneously controls pressure limiting valve, with pressure value in buffer rail and makes Its holding is constant, then inputs hydraulic oil in electric-controlled fuel injector, waits the oil spout instruction of electronic control unit；

The engine also includes position detecting system, and position detecting system is sensed by Linear displacement transducer and location triggered Device detects and sends signal when piston component reaches top dead center position, bottom dead center position and feed forward position, and feed forward position is located at Close to the side of top dead center position between top dead center position and bottom dead center position, controlled during for start operating performance piston compression stroke The closing of first control valve, feed forward position is determined according to the velocity amplitude cooperation position detecting system of piston；The engine is also wrapped Constant-voltage driving system is included, the constant-voltage driving system includes engine and hydraulic variable motor, by motor drive power square with bearing Carry the moment of resistance and keep the constant of output oil liquid pressure；Hydraulic variable motor is driven by output high-voltage oil liquid, and passes through deceleration device Couple with load, its discharge capacity is automatically adjusted with the change of operating pressure；

The engine also includes normal work control system and fire controll system：

Normal work control system, the control for engine nominal situation：Into after nominal situation, trigger valve and decompression are closed Valve, the first control valve maintains a normally open state, after start signal is sent, and the second control valve is opened, the hydraulic pressure in compression accumulator Oil enters compression chamber by the second control valve first, promotes piston component to be moved to top dead centre, after the first hydraulic fluid port is opened, and second Control valve is closed, and is connected between compression chamber and compression accumulator by the first hydraulic fluid port, when piston component reaches oil spout position, triggering Sensor, produces fuel injection signal, and control distributive value so that the ratio between compression time and Bulking Time are equal to two strokes of hydraulic pump Volume change the ratio between so that expansion flow with compression flow it is equal, with reduce engine output flow pulse, by oil spout System completes fuel injection process, and near top dead center, fuel combustion heat release, piston component is returned in the presence of cylinder pressure Lower dead center, and it is stable in lower dead center before the second control valve is again turned on；

Fire controll system, the control for engine fire operating mode：In engine working process, when start signal is sent Afterwards, one-time detection all is carried out to piston component position, if engine frequencies and frequency change rate are respectively less than setting value, detected The position of piston component, if piston component is not in bottom dead center position, and cylinder temperature cylinder pressure is less than value of catching fire, then it is assumed that engine exists Caught fire in a upper circulation, be now first shut off the first control valve, and open pressure-reducing valve and return control valve, make piston component Bottom dead center position is returned to, then the first control valve is opened, waits next start dialing signal, engine is according still further to normal work Make shuttling movement；

Second control valve uses maximum stream flow for 250L/min high-frequency electrohydraulic servo valve, and it is 10ms that it, which opens pulsewidth,.

2. a kind of path formation device of height output moment of torsion low noise according to claim 1, it is characterized in that, in addition to rise Autocontrol system, the control for engine state of starting operating：After start signal is sent, valve and pressure-reducing valve are on, is compressed Accumulator with high pressure accumulator due to being connected and pressure rise, and the compression ratio of engine is improved；Control unit of engine pair The signal of displacement transducer detected, if testing result shows that piston component is in lower dead center, by the first control valve and Second control valve is opened, and piston component starts compression travel, if detecting piston component not in the presence of compression accumulator In lower dead center, return control valve is first turned on, the hydraulic oil in pump chamber and compression chamber is released by low pressure oil way, makes piston component Bottom dead center position is returned in the presence of high pressure accumulator pressure, return control valve is closed, then start compression travel；Work as piston When reaching feed forward position, the second control valve is closed, and when piston reaches after top dead center, the first control valve is closed, and return control valve is beaten Open, piston component comes back to after bottom dead center, close return control valve, piston component completes a working cycles, during being somebody's turn to do The pressure and temperature value in cylinder when piston component reaches top dead centre is recorded, when frequency valve open signal is sent again, upper one is judged Whether the cylinder pressure and temperature of cycle index meet diesel-fuel ignition condition, if in-cylinder pressure and temperature are unsatisfactory for ignition condition, The above-described course of work is then repeated, until pressure and temperature is met after ignition condition, the control of normal work is initially entered Process.