CN203009033U - High-pressurization two-stroke in-cylinder direct injection engine - Google Patents
High-pressurization two-stroke in-cylinder direct injection engine Download PDFInfo
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- CN203009033U CN203009033U CN2012206940591U CN201220694059U CN203009033U CN 203009033 U CN203009033 U CN 203009033U CN 2012206940591 U CN2012206940591 U CN 2012206940591U CN 201220694059 U CN201220694059 U CN 201220694059U CN 203009033 U CN203009033 U CN 203009033U
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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
The utility model discloses a high-pressurization two-stroke in-cylinder direct injection engine. The high-pressurization two-stroke in-cylinder direct injection engine comprises an air cylinder, wherein a piston is arranged in the air cylinder, the piston is connected with a bent shaft through a connection shaft, an oil sprayer is arranged in the central position of the top wall of the air cylinder, the top wall of the air cylinder is further provided with an air inlet hole and an air exhausting hole, an air inlet door is arranged on the air inlet hole, the air inlet hole is communicated with an air inlet passageway, a high-pressure ratio pressurizer is arranged on the air inlet passageway, an air exhausting door is arranged on the air exhausting hole, and the air exhausting hole is communicated with the air exhausting passageway. In a circulation, according to the rotation angle of the bent shaft, the air exhausting door is opened before a bottom dead center and is closed after the bottom dead center, the air inlet door is opened after the bottom dead center and is closed before the bottom dead center, and the air inlet door is closed after the air exhausting door is closed. The high-pressurization two-stroke in-cylinder direct injection engine is compact in structure, low in manufacturing difficulty, and controllable in air inlet and air outlet, largely improves the power-to-weight ratio, and can achieve fuel economy and emission level similar to a four-stroke engine.
Description
Technical field
The utility model belongs to engine art, is specifically related to a kind of two stroke engine.
Background technique
On the century-old history of development of engine, two stroke engine has its unique advantage always, and as lightweight in simple in structure, volume is little, and cost is low, and the advantage such as operate steadily.
Two-stroke gasoline engine structure and working principle as can be known, the waste gas after it utilizes inflammable mixture in crankcase or the fresh air in crankcase to burning purges, thereby inevitably exists inflammable gas is discharged outside machine.Simultaneously, the lubricant oil in crankcase also inevitably is blended in air and burns, and increases thus the consumption of lubricant oil, also is unfavorable for reducing the hydrocarbon HC discharge amount of motor.Because two stroke engine utilizes the incoming mixture scavenging, make load higher, incoming mixture runs off also the more, and when idling and low lotus, because the ratio of residual gas is large, burns also undesired, makes the HC concentration in discharging higher, has increased the weight of atmospheric pollution.
Under the overall situation of energy-saving and emission-reduction, although two stroke engine has been compared geneogenous advantage with four stroke engine.But the propellant flow rate that it is higher and pollutant discharge amount are little by little abandoned it by market.
Two-stroke engines to run is steady, volume is little in order to take full advantage of, lightweight these advantages, reduces its discharging and fuel consumption, the utility model proposes a kind of new two stroke engine air-exchanging structure, scavenging way and port timing.
Summary of the invention
Given this, the utility model purpose is to provide the two stroke engine that a kind of fuel consumption dose rate is low, pollutant discharge amount is low.
For solving above technical problem, the technological scheme that the utility model provides is, a kind of high pressure-charging two-stroke in-cylinder direct fuel-injection engine is provided, and comprises cylinder, and piston is installed in cylinder, and piston is connected with bent axle by connecting rod; Cylinder roof center is equipped with oil sprayer, also is provided with inlet hole and exhaust port on described cylinder roof, on described inlet hole, intake valve is installed, and inlet hole is communicated with intake duct, and the high pressure ratio pressurized machine is installed on intake duct; On described exhaust port, exhaust valve is installed, exhaust port is communicated with air outlet flue.
Preferably, described oil sprayer is positioned in the middle of inlet hole and exhaust port.
Further, air-strainer is installed also on described intake duct, before described air-strainer is positioned at described high pressure ratio pressurized machine.
Further, described inlet hole edge is provided with an air guide screen, and this air guide screen is positioned at exhaust port one side.
Preferably, described air guide screen is arc-shaped flaky structure or slab construction.
Further, on described air outlet flue, turbo machine is installed.
Compared with prior art, the beneficial effects of the utility model have the following aspects:
1, adopted the air valve structure the same with four stroke engine, improved the gas port that former two stroke engine adopts, reduced requirement on machining accuracy, improve the tightness of the air interchanger of motor, can use changeable mechanism in order to strengthen ACTIVE CONTROL ability to the engine breathing process to valve mechanism.
2, can control the inlet and outlet phase place with molded line under cam after adopting this valve mechanism, and the inlet and outlet phase place is decided in the position that does not rely on suction port and scavenging port.
3, the air guide screen helps ventilation and scavenging process.
4, adopt the mode of utilizing the fresh air after high pressure-charging to carry out air inlet and scavenging, can realize the ACTIVE CONTROL to air inlet and scavenging process.
5, can realize ACTIVE CONTROL to residual waste gas quantity in cylinder and air pressure by cooperatively interacting of intake valve and exhaust valve.
6, crankcase is no longer passed through in air inlet, has avoided the consumption to lubricant oil, has reduced the noxious emission of motor.
7, because total is similar to four stroke engine with air inlet, therefore can realize the fuel consumption and emission level that approaches with four stroke engine.
8, adopt the mode of in-cylinder direct injection fuel oil, avoided utilizing inflammable mixture to come scavenging.
9, improved the power-weight ratio of two stroke engine.
Description of drawings
Fig. 1 is the structural representation of high pressure-charging two-stroke in-cylinder direct fuel-injection engine described in the utility model.
Fig. 2 is high pressure-charging two-stroke in-cylinder direct fuel-injection engine valve timing diagram described in the utility model.
Embodiment
Describe below in conjunction with accompanying drawing and specific embodiment.
Referring to Fig. 1 and Fig. 2.The described high pressure-charging two-stroke of the present embodiment in-cylinder direct fuel-injection engine comprises cylinder 5, and piston 6 is installed in cylinder, and piston 6 is connected with bent axle 8 by connecting rod 7.Cylinder 5 roof centers are equipped with oil sprayer 11, are used for spraying into fuel in cylinder 5.Also be provided with an inlet hole and an exhaust port on cylinder 5 roofs, oil sprayer 11 is positioned at the line mid point of inlet hole and exhaust port.Intake valve 4 is installed on inlet hole, and inlet hole is communicated with intake duct 3, and air-strainer 1 and high pressure ratio pressurized machine 2 are installed on intake duct 3, before air-strainer 1 is positioned at described high pressure ratio pressurized machine 2.The inlet hole edge is provided with an air guide screen 13, this air guide screen 13 is positioned at exhaust port one side, air guide screen 13 is the arc-shaped flaky structure, it can be also slab construction, the surface that its fresh air is flowed through is the coanda surface, as everyone knows, the surperficial convection cell of coanda has attached wall effect, can change the flow direction of former fluid.Exactly, the air guide screen can make fresh air can arrive the bottom of cylinder along the sidewall of cylinder 5 one sides in cylinder, is convenient to the waste gas in cylinder 5 is extruded.Exhaust valve 9 is installed on exhaust port, and exhaust port is communicated with air outlet flue 10, and turbo machine 12 is installed on air outlet flue 10.
Fresh air enters intake duct 3, after air-strainer 1 filters, be pressurized to more than 0.6 through high pressure ratio pressurized machine 2 again, after a part fresh air and burnt gas mix by together with discharge cylinder, another part fresh air is stayed in cylinder, and this process is equivalent to the scavenging process of existing two stroke engine.High pressure-charging two-stroke in-cylinder direct fuel-injection engine described in the utility model has been cancelled the suction port of existing two stroke engine, relief opening and scavenging port, the air that enters in cylinder no longer passes through crankcase, has avoided the consumption of lubricant oil in cylinder body, has reduced the noxious emission of motor.
In engine working process, more than high pressure ratio pressurized machine 2 need to be pressurized to 0.6MPa with fresh air, the one, be convenient to the waste gas in cylinder is displaced, be to make cylinder interior keep a higher initial pressure on the other hand.Complete the acting of a upper circulation when piston 6 after, open at the exhaust valve before bottom dead center 9 of this circulation, motor begins the free exhaust process.Piston 6 turns over and begins after bottom dead center uply, and motor enters the forced exhaust stage.Open at a certain moment intake valve 4 after bottom dead center, high pressure fresh air in intake duct 3 enters cylinder 5 after by intake valve 4, the high pressure fresh air flows toward cylinder bottom under the effect of air guide screen 13, burnt gas in cylinder is displaced, simultaneously the part fresh air with after burnt gas mixes by together with discharge cylinder 5.When the amount of fresh air in cylinder 5 and air pressure reached default air pressure, intake valve 4 and exhaust valve 9 were successively closed, and motor enters compression stroke.In the piston arrives budc, oil sprayer 11 sprays into fuel cylinder 5 and forms inflammable mixture, the burning mixture burning, and piston 6 is crossed the atdc motor and is entered working stroke, and motor is completed a complete two stroke cycle process thus.Then motor continues operation, carries out process as hereinbefore, keeps thus the motor continuous running.This two-stroke high pressure-charging in-cylinder direct fuel-injection engine can be used for burns gasoline and diesel engine, and other fuel similar with diesel oil to gasoline also can be used for burning.
Fig. 2 shows a kind of high pressure-charging two-stroke in-cylinder direct fuel-injection engine port timing, and according to the rotation angle of bent axle 8, exhaust valve 9 is in piston arrives 45 ° of unlatchings before bottom dead center, closes walking around after bottom dead center 60 °; Intake valve 4 is walked around 15 ° of unlatchings after bottom dead center at piston, closes 85 ° of arrival budc, as shown in Figure 2.In Fig. 2, A is top dead center, and B is lower dead center, and a1 is exhauxt valve opens, and a2 is exhaust valve closing, and b1 is IO Intake Valve Opens, and b2 is IC Intake Valve Closes.According to different types and different rotating speeds, the best port timing of high pressure-charging two-stroke in-cylinder direct fuel-injection engine can be adjusted.
Be below only preferred implementation of the present utility model, should be pointed out that above-mentioned preferred implementation should not be considered as restriction of the present utility model, protection domain of the present utility model should be as the criterion with the claim limited range.For those skilled in the art, within not breaking away from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (6)
1. a high pressure-charging two-stroke in-cylinder direct fuel-injection engine, comprise cylinder (5), and piston (6) is installed in cylinder, and piston (6) is connected with bent axle (8) by connecting rod (7); It is characterized in that, cylinder (5) roof center is equipped with oil sprayer (11), also be provided with inlet hole and exhaust port on described cylinder (5) roof, intake valve (4) is installed on described inlet hole, inlet hole is communicated with intake duct (3), and high pressure ratio pressurized machine (2) is installed on intake duct (3); Exhaust valve (9) is installed on described exhaust port, and exhaust port is communicated with air outlet flue (10).
2. high pressure-charging two-stroke in-cylinder direct fuel-injection engine according to claim 1, is characterized in that, described oil sprayer (11) is positioned in the middle of inlet hole and exhaust port.
3. high pressure-charging two-stroke in-cylinder direct fuel-injection engine according to claim 1, is characterized in that, air-strainer (1) also is installed on described intake duct (3), and it is front that described air-strainer (1) is positioned at described high pressure ratio pressurized machine (2).
4. high pressure-charging two-stroke in-cylinder direct fuel-injection engine according to claim 1, is characterized in that, described inlet hole edge is provided with an air guide screen (13), and this air guide screen (13) is positioned at exhaust port one side.
5. high pressure-charging two-stroke in-cylinder direct fuel-injection engine according to claim 4, is characterized in that, described air guide screen (13) is arc-shaped flaky structure or slab construction.
6. high pressure-charging two-stroke in-cylinder direct fuel-injection engine according to claim 1, is characterized in that, turbo machine (12) is installed on air outlet flue (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206940591U CN203009033U (en) | 2012-12-14 | 2012-12-14 | High-pressurization two-stroke in-cylinder direct injection engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206940591U CN203009033U (en) | 2012-12-14 | 2012-12-14 | High-pressurization two-stroke in-cylinder direct injection engine |
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| Publication Number | Publication Date |
|---|---|
| CN203009033U true CN203009033U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206940591U Expired - Fee Related CN203009033U (en) | 2012-12-14 | 2012-12-14 | High-pressurization two-stroke in-cylinder direct injection engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016136A (en) * | 2012-12-14 | 2013-04-03 | 西华大学 | High-supercharged two-stroke direct injection engine and ventilation method thereof |
-
2012
- 2012-12-14 CN CN2012206940591U patent/CN203009033U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016136A (en) * | 2012-12-14 | 2013-04-03 | 西华大学 | High-supercharged two-stroke direct injection engine and ventilation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20161214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |