CN201826965U - Two-stroke layering scavenging engine - Google Patents
Two-stroke layering scavenging engine Download PDFInfo
- Publication number
- CN201826965U CN201826965U CN2010202757511U CN201020275751U CN201826965U CN 201826965 U CN201826965 U CN 201826965U CN 2010202757511 U CN2010202757511 U CN 2010202757511U CN 201020275751 U CN201020275751 U CN 201020275751U CN 201826965 U CN201826965 U CN 201826965U
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- Prior art keywords
- scavenging
- air belt
- scavenging air
- stroke
- piston
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
A two-stroke layering scavenging engine comprises a cylinder body, a piston, a cylinder cavity, a front half crankcase, a rear half crankcase and a crankshaft chamber which is formed by the front half crankcase and the rear half crankcase. The two-stroke layering scavenging engine is characterized in that scavenging ducts for communicating the crankshaft chamber with the cylinder cavity are symmetrically arranged on the cylinder body and comprise a first scavenging duct and a second scavenging duct, wherein the first scavenging duct is communicated with an air filter, a check valve, the air filter and the first scavenging duct are communicated through a hose, and the first scavenging duct and the second scavenging duct are independent and not communicated. By adopting the structure, the engine, which is the two-stroke layering scavenging engine, can remarkably reduce the content of objectionable constituents (HC+NOx) in the tail gas, thereby improving the discharge.
Description
Technical field
The utility model relates to technical field of engines, particularly a kind of Small Universal two stroke engine.
Background technique
Two stroke engine because have that compact structure, volume are little, light weight, running speed-raising are fast etc., and many remarkable advantages are widely used in many product scopes such as agricultural, forestry, gardening, family.Motor is made up of component such as cylinder body, crankshaft-link rod assembly, moving element, magnetogenerator, Carburetors, is provided with suction port, relief opening and scavenging port in the tube stem portion of cylinder body, and opening or closing by piston motion of these gas ports controlled.A work cycle of motor is to be finished by two strokes of piston motion, and it is such to be different from four stroke engine, is provided with aspirating stroke and exhaust stroke specially.
Rise to when suction port, relief opening, scavenging port all closed at piston, beginning compression work mixed gas forms degree of vacuum in the crankshaft room below piston simultaneously.When piston continues when up, suction port is opened, and under the atmospheric pressure effect, inflammable mixture enters crankshaft room from Carburetor.Piston is during near top dead center, and spark plug sends electrical spark, lights compressed mixed gas.High temperature and high pressure gas after the burning expands and forces piston to move down.Suction port is closed gradually, and the inflammable mixture that flows into crankshaft room is compressed in advance because of piston moves down.When piston during near lower dead center, exhaust open, waste gas flows into the atmosphere from baffler through relief opening, and the inflammable mixture that is compressed flows in the cylinder from scavenging port, and drives away waste gas, just so-called scavenging.But the inflammable mixture that is used for carrying out scavenging then is easy to mix with gas of combustion, this part inflammable mixture has not just been arranged through burning and has been gone out like this, not only the fuel-economy performance is relatively poor so two stroke engine is with respect to four stroke engine, and contain a large amount of harmful components, for example HC and CO in the tail gas.Although the therefore discharge capacity of two stroke engine and little is significant to the influence of harmful components in the atmospheric pollutant.Existing in addition two stroke engine can not satisfy HC (hydrocarbon) index in strict day by day Abgasgesetz, the especially tail gas that administration formulates usually, and the limit value that exceeds Abgasgesetz is a lot.
Summary of the invention
The purpose of this utility model provides a kind of two-stroke layered scavenging motor, during scavenging, air carries out scavenging earlier, inflammable mixture enters the firing chamber then, thereby reach the purpose that reduces harmful components (HC+NOx) content in the tail gas, thereby improve discharging, and effectively reduce the fuel consumption rate of motor, improve its economic performance;
The technological scheme that the utility model is taked is, a kind of two-stroke layered scavenging motor, the crankshaft room that comprises cylinder body, piston, cylinder chamber, preceding half crankcase, later half crankcase, forms by front and back half crankcase, it is characterized in that: be symmetrically arranged with the scavenging air belt that crankshaft room is communicated with the cylinder chamber on the cylinder body, scavenging air belt has first scavenging air belt and second scavenging air belt, wherein first scavenging air belt communicates with empty filter, one-way valve, empty filter, first scavenging air belt communicate with flexible pipe, and first scavenging air belt, second scavenging air belt independently do not communicate.
First scavenging air belt is the stored air passage, and second scavenging air belt is for storing mixed gas passage, and the first scavenging air belt phase place is higher than second scavenging air belt; Use one-way valve between the empty filter and first scavenging air belt; One-way valve needs to open under the negative pressure of 200pa～2000pa; Air passageways between the one-way valve and first scavenging air belt, the empty filter (comprising first air passageways, second air passageways) sectional area is less than 25 square millimeters and greater than 1 square millimeter.
Working procedure according to the two-stroke layered scavenging motor that the utlity model has said structure is as follows: in the upward stroke of piston, along with the pressure in the crankshaft room reduces, under the effect of atmospheric pressure, mixed gas is drawn into crankshaft room and is retained in wherein from Carburetor, simultaneously air is sucked first scavenging air belt.When the mixed gas in the firing chamber, piston top is lighted and when burning, under the promotion of combustion gas, descent of piston, mixed gas in the crankshaft room and second scavenging air belt and the air in first scavenging air belt are compressed, it at first is Exhaust Open, when piston continues when descending, the scavenging port that is positioned at first scavenging air belt is opened.In the starting stage of scavenging port opening, air in first scavenging air belt is flushed in the cylinder chamber, piston continues when descending then, and the mixed gas in second scavenging air belt enters in the cylinder chamber, as scavenge flow with certain scavenging angle from the scavenging outlet spray into cylinder body and relief opening over against internal face on.Scavenge flow impacts on the inboard wall of cylinder block face subsequently, and then reflexed from here, thereby waste gas after burning is discharged from relief opening.Realize air preceding, mixed gas after, thereby reduce (HC+NOx) content.
The beneficial effects of the utility model are to compare with traditional two stroke engine, because the use air scavenging lowers (HC+NOx) content greatly.Under the operating mode of setting power output, can effectively reduce the content of the content, particularly HC (hydrocarbon) of harmful components in the tail gas, its fuel consumption rate also reduces significantly.
Description of drawings
Fig. 1 is according to two-stroke layered scavenging motor of the present utility model
Fig. 2 is the cross section view of being done along the A-A line among Fig. 1
Fig. 3 is the cross section view of being done along the B-B line among Fig. 1
Fig. 4 is the schematic representation of cylinder body scavenging air belt along the cylinder body skirt section
Fig. 5 is the cross section view of being done along the C-C line line among Fig. 4
Fig. 6 is HC (hydrocarbon) contrast and experiment in the utility model scheme and the prior art two-stroke gasoline engine tail gas
Sequence number explanation in the accompanying drawing: 1. spark plug; 2. Carburetor; 3. empty filter; 4. first air passageways; 5. one-way valve; 6. second air passageways; 7. first scavenging air belt; 8. second scavenging air belt; 9. cylinder body; 10. firing chamber; 11. piston; 12. crankshaft-link rod group; 13. cylinder chamber; 14. preceding half crankcase; 15. crankshaft room; 16. later half crankcase; 17. relief opening; 18. second scavenging air belt outlet; 19. first scavenging air belt outlet; 20. suction port.
Embodiment
As Fig. 1, Fig. 2, shown in Figure 3, according to two-stroke layered scavenging motor of the present utility model, the ignition system that the motion assembly that crankshaft room's assembly of being made up of cylinder body 9, cylinder chamber 13, preceding half crankcase 14 and later half crankcase 16, crankshaft-link rod group 12, piston 11 etc. are formed, magnetogenerator spark plug 1 etc. are formed, Carburetor 2, one-way valve 5 etc. are formed.
The working procedure of two-stroke layered scavenging motor is as follows: in the upward stroke of piston 11, along with the pressure in the crankshaft room 15 reduces, under the effect of atmospheric pressure, mixed gas is drawn into crankshaft room 15 and is retained in wherein from Carburetor 2, air enters first air passageways 4 by empty filter 3 simultaneously, enter second air passageways 6 through one-way valve 5 again, and be stored in first scavenging air belt 7.When the mixed gas in the firing chamber, piston 11 top 10 is lighted and is burnt, under the promotion of combustion gas, piston 11 is descending, the mixed gas in the crankshaft room 15 and second scavenging air belt 8 and the air of first scavenging air belt 7 are compressed, near lower dead center the time, at first be that relief opening 17 is opened, when piston 11 further when descending, the gas of the compression crankshaft chamber 15 and first scavenging air belt 7, second scavenging air belt 8, make the pressure of the gas pressure of the win scavenging air belt 7 and second scavenging air belt 8 greater than the firing chamber, first scavenging air belt outlet 19 that at this moment is positioned at the scavenging air belt downstream is opened.Pure air enters firing chamber 10, carries out scavenging, and piston 11 continues descending, second scavenging air belt outlet 18 is opened, and mixed gas carries out scavenging, and at this moment air is preceding, mixed gas after, scavenge flow with certain horizontal scavenging angle from scavenging outlet spray to cylinder body 9 and relief opening 17 over against internal face on.Scavenge flow impacts on cylinder body 9 internal faces subsequently, and then reflexed from here, thereby waste gas after burning is discharged from relief opening.Carry out scavenging preceding by air, mixed gas after, prevent that too much mixed gas runs off, play an important role to reducing discharging.
Compare with traditional two stroke engine, owing to adopt two scavenging air belts, mixed gas and air separate scavenging, and during scavenging, air carries out scavenging earlier, thereby reaches the purpose of reduction (HC+NOx) content.Under the operating mode of setting power output, can effectively reduce the content of the content, particularly HC (hydrocarbon) of harmful components in the tail gas, its fuel consumption rate also reduces significantly.
To respectively 10 of the two stroke engines that are 32.6CC according to the utility model design and prior art design discharge capacity, (throttle wide, rotating speed 7000r/min) detects under declared working condition, testing result is as shown in Figure 6: as can be seen from the figure, the two stroke engine that HC in its tail gas (hydrocarbon) content is produced than prior art reduces 67%.
Claims (5)
1. two-stroke layered scavenging motor, comprise cylinder body (9), piston (11), cylinder chamber (13), preceding half crankcase (14), later half crankcase (16), the crankshaft room (15) that forms by front and back half crankcase, it is characterized in that: on cylinder body (9), be symmetrically arranged with the scavenging air belt that crankshaft room (15) is communicated with cylinder chamber (13), scavenging air belt has first scavenging air belt (7) and second scavenging air belt (8), wherein first scavenging air belt (7) communicates with empty filter (3), one-way valve (5), empty filter (3), first scavenging air belt (7) communicates with flexible pipe, and first scavenging air belt (7) does not communicate with second scavenging air belt (8) is independent.
2. a kind of two-stroke layered scavenging motor according to claim 1 is characterized in that first scavenging air belt (7) is the stored air passage, and second scavenging air belt (8) is for storing mixed gas passage, and first scavenging air belt (7) phase place is higher than second scavenging air belt (8).
3. a kind of two-stroke layered scavenging motor according to claim 1 is characterized in that using one-way valve (5) between sky filter (3) and first scavenging air belt (7).
4. a kind of two-stroke layered scavenging motor according to claim 1 is characterized in that one-way valve (5) needs to open under the negative pressure of 200pa～2000pa.
5. a kind of two-stroke layered scavenging motor according to claim 1 is characterized in that air passageways sectional area between one-way valve (5) and first scavenging air belt (7), the empty filter (3) is less than 25 square millimeters and greater than 1 square millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202757511U CN201826965U (en) | 2010-07-24 | 2010-07-24 | Two-stroke layering scavenging engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202757511U CN201826965U (en) | 2010-07-24 | 2010-07-24 | Two-stroke layering scavenging engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201826965U true CN201826965U (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202757511U Expired - Fee Related CN201826965U (en) | 2010-07-24 | 2010-07-24 | Two-stroke layering scavenging engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN201826965U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832271A (en) * | 2015-04-27 | 2015-08-12 | 宁波大叶园林设备有限公司 | Easy-to-start two-stroke gasoline engine containing multiple scavenging channel partition walls |
| CN106436628A (en) * | 2016-10-19 | 2017-02-22 | 宁波大叶园林设备有限公司 | Blowing and sucking machine provided with improved safety button and built-in engine |
| CN106436629A (en) * | 2016-10-19 | 2017-02-22 | 宁波大叶园林设备有限公司 | Portable blowing and sucking machine driven by micro two-stroke engine |
-
2010
- 2010-07-24 CN CN2010202757511U patent/CN201826965U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832271A (en) * | 2015-04-27 | 2015-08-12 | 宁波大叶园林设备有限公司 | Easy-to-start two-stroke gasoline engine containing multiple scavenging channel partition walls |
| CN106436628A (en) * | 2016-10-19 | 2017-02-22 | 宁波大叶园林设备有限公司 | Blowing and sucking machine provided with improved safety button and built-in engine |
| CN106436629A (en) * | 2016-10-19 | 2017-02-22 | 宁波大叶园林设备有限公司 | Portable blowing and sucking machine driven by micro two-stroke engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 276017 No. 1 Zhongtian Road, Luozhuang hi tech Development Zone, Shandong, Linyi Patentee after: Shandong Huasheng Pesticide Machinery Co., Ltd. Address before: 276017 No. 1 Zhongtian Road, Luozhuang hi tech Development Zone, Shandong, Linyi Patentee before: Shandong Huasheng Pesticide Machinery Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20180724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |