CN201496164U - Piston of direct-injection gasoline engine - Google Patents
Piston of direct-injection gasoline engine Download PDFInfo
- Publication number
- CN201496164U CN201496164U CN2009203092828U CN200920309282U CN201496164U CN 201496164 U CN201496164 U CN 201496164U CN 2009203092828 U CN2009203092828 U CN 2009203092828U CN 200920309282 U CN200920309282 U CN 200920309282U CN 201496164 U CN201496164 U CN 201496164U
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- piston
- gasoline engine
- fuel
- direct
- injection
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Abstract
The utility model provides a piston of a direct-injection gasoline engine, which belongs to the technical field of automobile engines and solves the problem that the piston of the present direct-injection gasoline engine can not enable the mixture gas around a sparking plug to reach higher concentration, and the starting is influenced. The piston of the direct-injection gasoline engine includes a piston body mounted in an air cylinder, and a concave hole for the injection of fuel is formed at the top of the piston body. Since the concave hole for the injection of fuel is formed at the top of the piston body, the piston of the direct-injection gasoline engine can successfully feed the high-pressure fuel to the periphery of the sparking plug, cause the fuel to tumble in the air cylinder, realize the smooth combustion, and improve the thermal efficiency and the recirculation rate of waste gas.
Description
Technical field
The utility model belongs to technical field of automobile engine, relates to a kind of piston of directly jetting gasoline engine.
Background technique
Thereby traditional petrol engine is to carry out gas-duct jetting by computer collection camshaft location and each related data control oil nozzle of motor.Gasoline begins to mix in air flue, and then enters into cylinder and burn.Air is 14.7/1 (also being chemically correct fuel) with the optimum mixture ratio of gasoline, and conventional engines could obtain power character and Economy preferably owing to adopt gas-duct jetting so must reach chemically correct fuel.But because oil nozzle has certain distance from the firing chamber; gasoline is subjected to the influence of charge air flow and valve switch bigger with the Air mixing situation; and small oil particles can be adsorbed on the tube wall; this just makes chemically correct fuel be difficult to reach, and this is the technical problem that conventional engines is difficult to solution.
In cylinder, just can solve this difficult problem to fuel direct injection.Direct injection spark ignition engine adopts the fuel feeding technology be similar to diesel engine, provides pressure more than the required 100bar by a high pressure oil pump, gasoline is offered the electromagnetism fuel nozzle that is positioned at cylinder.By computer control sparger fuel is directly injected the firing chamber in the most appropriate time then,, allow mixed gas can produce stronger eddy current air and gasoline are fully mixed by design to the firing chamber interior shape.Make the spark plug peripheral region that denseer mixed gas can be arranged then, there is rarer mixed gas other neighboring areas, have guaranteed to realize lean combustion as much as possible under the situation of igniting smoothly.
Used piston in the domestic general directly jetting gasoline engine, its end face is smooth, and gasoline can be ejected on the cylinder wall, and air-flow in the cylinder is because burning is undesired.Compression ratio can not have lifting by a relatively large margin simultaneously, and can not form than rich mixture around spark plug, may meet difficulty during engine start.
In addition, because the flat design of piston-top surface has badly influenced the realization of layering lean burn technology again, and the layering lean burn technology realizes just that the directly jetting gasoline engine oil consumption is low, one of key technology of power and moment of torsion output advantages of higher.The layering lean burn technology is mainly utilized swirling motion in the cylinder, makes near the mixed gas that accumulates in the spark plug the denseest, advances burning to skin rapidly after being lighted, and can adopt higher compression ratio.Air motion depends on the design of air flue, combustion-chamber shape and piston head shape in the cylinder, so the piston head shape has special important meaning to air motion in the cylinder of directly jetting gasoline engine.
Summary of the invention
The purpose of this utility model is at the existing the problems referred to above of the piston in the existing directly jetting gasoline engine, and a kind of piston that high pressure fuel successfully can be guided to the directly jetting gasoline engine around the spark plug proposed, it can make fuel oil cause in cylinder and roll stream, make burning smoothly, improve the thermal efficiency and ER EGR Rate.
The purpose of this utility model can realize by following technical proposal: a kind of piston of directly jetting gasoline engine, comprise a piston only that is installed in the cylinder, and it is characterized in that the top of described piston only has for the fuel-injected pit.
In the piston of above-mentioned directly jetting gasoline engine, the top bump of described piston only is " people " shape roof shape, and above-mentioned pit is arranged on one of them plane of inclination at piston only top.
The oil bundle that ejects from oil nozzle is sprayed on pit at a high speed, forms eddy current and form denseer mixed gas around spark plug, has enough inflammable mixtures to guarantee that igniting smoothly when guaranteeing the piston igniting on every side.
In the piston of above-mentioned directly jetting gasoline engine, the opposite side at described piston only top is similarly the inclined-plane.Locate the cylinder top shape and be complementary with holding one's breath, piston motion is during to the cylinder top, a piston head sealing of will holding one's breath.
Compared with prior art, the piston of this directly jetting gasoline engine is made the top " people " shape roof shape, and has pit for fuel injection, helps forming the high concentration mixed gas around spark plug, strengthens ER EGR Rate simultaneously.Compare traditional injection, power, moment of torsion all can further promote, and simultaneously because the special shape of piston combustion bowl makes burning more favourable, the guiding form of air-flow in the cylinder are all had leading role preferably.
Description of drawings
Fig. 1 is the sectional structure schematic representation of the piston of this directly jetting gasoline engine.
Fig. 2 is the perspective view of the piston of this directly jetting gasoline engine.
Among the figure, 1, piston only; 1a, top; 2, pit.
Embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As depicted in figs. 1 and 2, the piston of this directly jetting gasoline engine comprises a piston only 1 that is installed in the cylinder, and the top 1a of piston only 1 is " people " shape roof shape towards spark plug and projection.1a both sides, piston only 1 top are the inclined-plane, and the inclined-plane, left side is provided with for fuel-injected pit 2.
The oil bundle that ejects from oil nozzle is sprayed on pit 2 at a high speed; pit 2 forms the wall guiding; high pressure fuel is successfully guided to around the spark plug, around spark plug, form denseer mixed gas, have enough inflammable mixtures to guarantee that igniting smoothly around when guaranteeing plug ignition.
And, in cylinder, cause and roll stream, make burning smoothly, improve the thermal efficiency, ER EGR Rate etc., form burning forms such as lean combustion, stratified mixture combustion again on this motor.Simultaneously strengthened guiding length in piston only 1 skirt section, the impact of the countercylinder that produces when making high pressure of explosion lower piston body 1 commutation that produces under 12 compression ratios has had buffering preferably.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (3)
1. the piston of a directly jetting gasoline engine comprises a piston only (1) that is installed in the cylinder, it is characterized in that the top (1a) of described piston only (1) has for fuel-injected pit (2).
2. the piston of directly jetting gasoline engine according to claim 1, it is characterized in that, top (1a) projection of described piston only (1) is " people " shape roof shape, and above-mentioned pit (2) is arranged on one of them plane of inclination at piston only (1) top (1a).
3. the piston of directly jetting gasoline engine according to claim 2 is characterized in that, the opposite side at described piston only (1) top (1a) is similarly the inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203092828U CN201496164U (en) | 2009-08-31 | 2009-08-31 | Piston of direct-injection gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203092828U CN201496164U (en) | 2009-08-31 | 2009-08-31 | Piston of direct-injection gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201496164U true CN201496164U (en) | 2010-06-02 |
Family
ID=42439372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203092828U Expired - Lifetime CN201496164U (en) | 2009-08-31 | 2009-08-31 | Piston of direct-injection gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201496164U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108779734A (en) * | 2016-11-22 | 2018-11-09 | 马自达汽车株式会社 | The control device of engine |
-
2009
- 2009-08-31 CN CN2009203092828U patent/CN201496164U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108779734A (en) * | 2016-11-22 | 2018-11-09 | 马自达汽车株式会社 | The control device of engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Yuanjing Auto Parts Co., Ltd. Assignor: Zhejiang Geely Automobile Research Institute Co., Ltd., Zhejiang Geely Holding Group Company Limited Contract record no.: 2013330000311 Denomination of utility model: Piston of direct-injection gasoline engine Granted publication date: 20100602 License type: Exclusive License Record date: 20131011 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100602 |
|
| CX01 | Expiry of patent term |