CN104653326B - Top structure of direct-injection gasoline engine piston - Google Patents
Top structure of direct-injection gasoline engine piston Download PDFInfo
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- CN104653326B CN104653326B CN201410760980.5A CN201410760980A CN104653326B CN 104653326 B CN104653326 B CN 104653326B CN 201410760980 A CN201410760980 A CN 201410760980A CN 104653326 B CN104653326 B CN 104653326B
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- pit
- top surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a top structure of a direct-injection gasoline engine piston. The top structure of the direct-injection gasoline engine piston comprises a horseshoe-shaped protrusion arranged on the top of the piston. An approximately basin-shaped pit is enclosed in the protrusion and is closer to the left of the piston relative to the top center of the piston. The bottom surface of the pit is a flat surface inclined downwards from left to right. The right of the protrusion is provided with an exhaust opening inclined downwards for avoiding the inclined surface. The top structure of the direct-injection gasoline engine piston can increase the compression ratio of engine combustion and improve the engine thermal efficiency and the fuel economy.
Description
Technical field
The present invention relates to a kind of piston of gasoline engine, specially a kind of top structure of direct spray petrol engine in cylinder piston.
Background technology
In-cylinder direct-jet technology is the hot spot technology of recent domestic gasoline engine exploitation, and it has good job stability
And load performance, stratified combustion can be realized.Fuel oil consumption is reduced while engine power and moment of torsion is lifted.In-cylinder direct-jet skill
The application of art, it is necessary to the suitable combustion-chamber shape of respective design, to coordinate the catalysis ignition for realizing in-cylinder direct fuel-injection engine, layering
The functions such as burning, formation in-cylinder tumble flow.
The combustion chamber of engine is mainly by the combustion chamber and top land structure composition.At present, general direct-injection is started
Machine top land is all designed with water conservancy diversion pit, to realize that the function of combustion, stratified combustion and tumble flow is opened in the catalysis of direct injection technology.But one
As the pit of direct fuel-injection engine top land be designed as circle or ellipse, this structure can not effectively improve ignition temperature,
Affect catalysis to open fuel efficiency fruit, Tumble and swirl, peak combustion pressure are relatively low, affect oil gas to be sufficiently mixed, efficiency of combustion is not enough.
The content of the invention
It is an object of the invention to provide a kind of top structure of direct spray petrol engine in cylinder piston, improves engine combustion pressure
Contracting ratio, improves engine thermal efficiency and fuel economy.
The top structure of direct spray petrol engine in cylinder piston of the present invention, including the shape of a hoof for being located at the top land
Projection, its opening portion towards piston left side, it is described it is raised in surround a substantially tub-shaped pit, in the projection
Periphery is provided with flat top surface, and it is put down by the air inlet side flat top surface and the exhaust side on the right side of top land on the left of top land
Top surface and the forward and backward side flat top surface of both sides before and after top land is located at respectively constituting, the raised right side has and dips down
Oblique exhaust valve avoids inclined-plane, and there is downward-sloping inlet valve to avoid inclined-plane in left side, avoids inclined-plane and enters in the inlet valve
Gas side flat top surface junction is provided with inlet valve hole, avoids inclined-plane in the exhaust valve and is provided with exhaust with exhaust side flat top surface junction
Door hole, relative to top land center closer to piston left side, the bottom surface of pit is downward-sloping from left to right to the pit
Plane, the pit is symmetrical before and after the center line of piston left and right directions, the bottom profile of the pit by two arc sections with
And the straightway tangent with two arc sections is constituted, the center of circle of two arc section is located on the center line of piston left and right directions and all
Positioned at the left side at top land center, and the radius wherein closer to the arc section of bump openings part is less, the pit
Crater wall be cambered surface, handing-over between the crater wall and the raised upper surface forms the top profile of pit.
Further, the central axis of the piston and the angle perpendicular between the axis of the pit bottom surface are 3～8 °.
Further, the radius of curvature of the crater wall of the pit is 5～8mm.
Further, in the bottom profile of the pit less arc section a diameter of 30～35mm, larger circular arc
A diameter of 35～40mm of section, the center of circle of two arc sections is at a distance of 8～13mm.
Further, it is described raised relative to the air inlet side flat top surface, the exhaust side flat top surface and described forward and backward
Side flat top surface is higher by 3～5mm.
Further, the side of the both sides in front and back of the projection is the conical surface, and its upper and lower ends is respectively by rounding and projection
Upper surface and forward and backward side flat top surface transition connection, the axle center of the conical surface is relative to top land center side cloth to the left
Put.
Further, the distance of shaft centers top land center 3～10mm to the left of the conical surface, conical surface bottom is a diameter of 60～
75mm, the angle between the conical surface and the forward and backward side flat top surface is 30～50 °.
Further, the exhaust valve on the raised top surface and right side avoided and connected by the rounding transition of R2～R5 between inclined-plane
Connect, avoid with the inlet valve in left side and be connected by the rounding transition of R4～R12 between inclined-plane, pass through between the crater wall of pit R0.5～
The rounding transition connection of R1.5.
Further, connect by rounding transition between inlet valve hole and air inlet side flat top surface, the exhaust valve hole and
Connected by rounding transition between exhaust side flat top surface.
Using the direct fuel-injection engine of piston of the present invention when cold starts, high-speed fuel oil can pass through leading for pit
Stream, in combustion chamber, FX forms denseer fuel mixture, improves maximum combustion temperature in cylinder, and makes highest combustion gas average
There is phase place and shifts to an earlier date in temperature, it is ensured that ternary catalyzing unit Fast light-off, reduces the noxious gas emission during cold starts.The piston
The raised arrangement of the shape at top, particularly top land, further increases engine combustion compression ratio, greatly improves circulation
Constant volume degree, than the combustion heat release rate of existing direct-injection piston about 10% is improved, and is increased burning velocity and is shortened the cycle, while improving combustion
Pressure is burnt, engine thermal efficiency and fuel economy can be improved.Matched by this piston and high tumble flow air flue, can be improved
The Tumble and swirl of gaseous mixture in cylinder, increases turbulence intensity in the cylinder near the top dead centre moment so that engine thermal efficiency and fuel oil Jing
Ji property further improves.Under low speed high load operating mode, can effectively mitigate the wet wall of fuel oil, reduce soot and hydrocarbon emission, carry
High engine reliability, under high-speed high-load operating mode, can mitigate fuel oil enriching protection demand, it is ensured that fuel economy.
Description of the drawings
Fig. 1 is the axonometric drawing of the present invention；
Fig. 2 is the top view of the present invention；
Fig. 3 is the A-A sectional views of Fig. 2；
Fig. 4 is the B-B sectional views of Fig. 2；
Fig. 5 is in-cylinder combustion temperature comparisons figure；
Fig. 6 is heat release curve comparison diagram；
Fig. 7 is in-cylinder combustion pressure comparison diagram；
Fig. 8 is Tumble and swirl comparison diagram；
Wherein, in Fig. 5 to Fig. 8, V1, V2, V3 are existing common direct-injection piston, and V4 is piston of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is further elaborated：
Embodiment one：
The top structure of direct spray petrol engine in cylinder piston as shown in Figure 1, Figure 2, Figure 3, Figure 4, including being located at the piston
Horseshoe-shaped raised the 2 of top, its opening portion is towards piston left side（Air inlet side）, it is substantially in basin that one is surrounded in the projection
The pit 1 of shape.
Relative to top land center closer to piston left side, the bottom surface 101 of pit is downward from left to right to the pit
Inclined plane, the pit is symmetrical before and after the center line of piston left and right directions.In the present embodiment, the central shaft of the piston
Line and the angle C2 perpendicular between the axis of the pit bottom surface are 5.5 °.
The bottom profile of the pit is made up of two arc sections and the straightway tangent with two arc sections, two circle
The center of circle of segmental arc is located on the center line of piston left and right directions and is all located at the left side at top land center, and wherein closer to
The radius of the arc section of bump openings part is less.Less arc section 101-a's is a diameter of in the bottom profile of the pit
A diameter of 37.5mm of 32.5mm, larger arc section 101-b, the center of circle of two arc sections is at a distance of 10.5mm.
The crater wall 102 of the pit is cambered surface, and the radius of curvature of the crater wall of the pit is 6.5mm.The crater wall 102 with
Handing-over between the raised upper surface forms the top profile of pit.
Flat top surface is provided with the raised periphery, it is by the air inlet side flat top surface 301 on the left of top land and position
Exhaust side flat top surface 302 on the right side of top land and the forward and backward side flat top surface of both sides before and after top land is located at respectively
303rd, 304 constitute.It is described it is raised relative to the air inlet side flat top surface 301, the exhaust side flat top surface 302 and it is described before,
Rear side flat top surface 303,304 is higher by h=4mm.
There is downward-sloping exhaust valve to avoid inclined-plane 203 on raised 2 right side, and left side has downward-sloping air inlet
Door avoids inclined-plane 201, avoids inclined-plane 201 in the inlet valve and is provided with inlet valve hole 202 with the junction of air inlet side flat top surface 301,
Inclined-plane 203 is avoided in the exhaust valve be provided with exhaust valve hole 204 with the junction of exhaust side flat top surface 302.
The transition of rounding 205 connection, the row are cheated by inlet valve between the inlet valve hole 202 and air inlet side flat top surface 301
The transition of rounding 206 connection is cheated by exhaust valve between valve hole 204 and exhaust side flat top surface 302.
The side of the raised both sides in front and back is the conical surface 207, and its upper and lower ends passes through respectively the He of conical surface top rounding 208
Conical surface bottom rounding 209 is connected with raised upper surface and the forward and backward side flat top surface 303,304 transition, the conical surface top
Rounding is the rounding of R2.
The distance of shaft centers top land center 6.5mm to the left of the conical surface, conical surface bottom diameter D1 are 67.5mm, the conical surface and institute
It is 40 ° to state the angle C1 between forward and backward side flat top surface 303,304.
The exhaust valve on the raised top surface 210 and right side to be avoided and avoid inclined-plane by the exhaust valve of R3.5 between inclined-plane 203
The transition of rounding 211 connects, and avoids with the inlet valve in left side and avoid the transition of inclined-plane rounding 212 company by the inlet valve of R8 between inclined-plane
Connect, be connected by the transition of crater wall rounding 213 of R1 between the crater wall of pit.
Fig. 5 is that above-mentioned piston is schemed with the in-cylinder combustion temperature comparisons of existing piston, it is seen then that highest burning in the cylinder of this piston
Temperature improves 250 DEG C, and makes highest combustion gas mean temperature phase place occur to shift to an earlier date.
Fig. 6 is the heat release curve comparison diagram of above-mentioned piston and existing piston, and the combustion heat release rate of this piston is than existing work
Plug improves about 10%, increases burning velocity and shortens the cycle.
Fig. 7 is the in-cylinder combustion pressure comparison diagram of above-mentioned piston and existing piston, and the combustion pressure of this piston is improved about
5Bar。
Fig. 8 is the Tumble and swirl comparison diagram of above-mentioned piston and existing piston, and relative to existing piston, this piston can improve cylinder
The Tumble and swirl of interior gaseous mixture, and increase turbulence intensity in the cylinder near the top dead centre moment.
Embodiment two：
The top structure of direct spray petrol engine in cylinder piston as shown in Figure 1, Figure 2, Figure 3, Figure 4, including being located at the piston
Horseshoe-shaped raised the 2 of top, its opening portion is towards piston left side（Air inlet side）, it is substantially in basin that one is surrounded in the projection
The pit 1 of shape.
Relative to top land center closer to piston left side, the bottom surface 101 of pit is downward from left to right to the pit
Inclined plane, the pit is symmetrical before and after the center line of piston left and right directions.In the present embodiment, the central shaft of the piston
Line and the angle C2 perpendicular between the axis of the pit bottom surface are 3 °.
The bottom profile of the pit is made up of two arc sections and the straightway tangent with two arc sections, two circle
The center of circle of segmental arc is located on the center line of piston left and right directions and is all located at the left side at top land center, and wherein closer to
The radius of the arc section of bump openings part is less.Less arc section 101-a's is a diameter of in the bottom profile of the pit
A diameter of 35mm of 30mm, larger arc section 101-b, the center of circle of two arc sections is at a distance of 8mm.
The crater wall 102 of the pit is cambered surface, and the radius of curvature of the crater wall of the pit is 5mm.The crater wall 102 and institute
State the top profile that handing-over between the upper surface of projection forms pit.
Flat top surface is provided with the raised periphery, it is by the air inlet side flat top surface 301 on the left of top land and position
Exhaust side flat top surface 302 on the right side of top land and the forward and backward side flat top surface of both sides before and after top land is located at respectively
303rd, 304 constitute.It is described it is raised relative to the air inlet side flat top surface 301, the exhaust side flat top surface 302 and it is described before,
Rear side flat top surface 303,304 is higher by 3mm.
There is downward-sloping exhaust valve to avoid inclined-plane 203 on raised 2 right side, and left side has downward-sloping air inlet
Door avoids inclined-plane 201, avoids inclined-plane 201 in the inlet valve and is provided with inlet valve hole 202 with the junction of air inlet side flat top surface 301,
Inclined-plane 203 is avoided in the exhaust valve be provided with exhaust valve hole 204 with the junction of exhaust side flat top surface 302.
The transition of rounding 205 connection, the row are cheated by inlet valve between the inlet valve hole 202 and air inlet side flat top surface 301
The transition of rounding 206 connection is cheated by exhaust valve between valve hole 204 and exhaust side flat top surface 302.
The side of the raised both sides in front and back is the conical surface 207, and its upper and lower ends passes through respectively the He of conical surface top rounding 208
Conical surface bottom rounding 209 is connected with raised upper surface and the forward and backward side flat top surface 303,304 transition, the conical surface top
Rounding is the rounding of R1.
The distance of shaft centers top land center 3mm to the left of the conical surface, conical surface bottom diameter D1 be 60mm, the conical surface with it is described
Angle C1 between forward and backward side flat top surface 303,304 is 30 °.
The exhaust valve on the raised top surface 210 and right side avoided and fallen by the exhaust valve avoidance inclined-plane of R2 between inclined-plane 203
Circle 211 transition connection, is avoided with the inlet valve in left side and be connected by the inlet valve avoidance transition of inclined-plane rounding 212 of R4 between inclined-plane,
It is connected by the transition of crater wall rounding 213 of R0.5 between the crater wall of pit.
Embodiment three：
The top structure of direct spray petrol engine in cylinder piston as shown in Figure 1, Figure 2, Figure 3, Figure 4, including being located at the piston
Horseshoe-shaped raised the 2 of top, its opening portion is towards piston left side（Air inlet side）, it is substantially in basin that one is surrounded in the projection
The pit 1 of shape.
Relative to top land center closer to piston left side, the bottom surface 101 of pit is downward from left to right to the pit
Inclined plane, the pit is symmetrical before and after the center line of piston left and right directions.In the present embodiment, the central shaft of the piston
Line and the angle C2 perpendicular between the axis of the pit bottom surface are 8 °.
The bottom profile of the pit is made up of two arc sections and the straightway tangent with two arc sections, two circle
The center of circle of segmental arc is located on the center line of piston left and right directions and is all located at the left side at top land center, and wherein closer to
The radius of the arc section of bump openings part is less.Less arc section 101-a's is a diameter of in the bottom profile of the pit
A diameter of 40mm of 35mm, larger arc section 101-b, the center of circle of two arc sections is at a distance of 13mm.
The crater wall 102 of the pit is cambered surface, and the radius of curvature of the crater wall of the pit is 8mm.The crater wall 102 and institute
State the top profile that handing-over between the upper surface of projection forms pit.
Flat top surface is provided with the raised periphery, it is by the air inlet side flat top surface 301 on the left of top land and position
Exhaust side flat top surface 302 on the right side of top land and the forward and backward side flat top surface of both sides before and after top land is located at respectively
303rd, 304 constitute.It is described it is raised relative to the air inlet side flat top surface 301, the exhaust side flat top surface 302 and it is described before,
Rear side flat top surface 303,304 is higher by 5mm.
There is downward-sloping exhaust valve to avoid inclined-plane 203 on raised 2 right side, and left side has downward-sloping air inlet
Door avoids inclined-plane 201, avoids inclined-plane 201 in the inlet valve and is provided with inlet valve hole 202 with the junction of air inlet side flat top surface 301,
Inclined-plane 203 is avoided in the exhaust valve be provided with exhaust valve hole 204 with the junction of exhaust side flat top surface 302.
The transition of rounding 205 connection, the row are cheated by inlet valve between the inlet valve hole 202 and air inlet side flat top surface 301
The transition of rounding 206 connection is cheated by exhaust valve between valve hole 204 and exhaust side flat top surface 302.
The side of the raised both sides in front and back is the conical surface 207, and its upper and lower ends passes through respectively the He of conical surface top rounding 208
Conical surface bottom rounding 209 is connected with raised upper surface and the forward and backward side flat top surface 303,304 transition, the conical surface top
Rounding is the rounding of R3.
The distance of shaft centers top land center 10mm to the left of the conical surface, conical surface bottom diameter D1 be 75mm, the conical surface with it is described
Angle C1 between forward and backward side flat top surface 303,304 is 50 °.
The exhaust valve on the raised top surface 210 and right side avoided and fallen by the exhaust valve avoidance inclined-plane of R5 between inclined-plane 203
Circle 211 transition connection, is avoided with the inlet valve in left side and be connected by the inlet valve avoidance transition of inclined-plane rounding 212 of R12 between inclined-plane,
It is connected by the transition of crater wall rounding 213 of R1.5 between the crater wall of pit.
Claims (9)
1. a kind of top structure of direct spray petrol engine in cylinder piston, including the horseshoe-shaped projection for being located at the top land（2）,
Its opening portion surrounds a substantially tub-shaped pit towards piston left side in the projection（1）, in the raised periphery
Flat top surface is provided with, it is by the air inlet side flat top surface on the left of top land（301）With the exhaust side on the right side of top land
Flat top surface（302）And respectively positioned at the forward and backward side flat top surface of both sides before and after top land（303、304）Constitute,
There is downward-sloping exhaust valve to avoid inclined-plane on the raised right side（203）, left side has downward-sloping inlet valve
Avoid inclined-plane（201）, avoid inclined-plane in the inlet valve and be provided with inlet valve hole with air inlet side flat top surface junction（202）, institute
State exhaust valve avoidance inclined-plane and be provided with exhaust valve hole with exhaust side flat top surface junction（204）,
It is characterized in that：The pit is relative to top land center closer to piston left side, the bottom surface of pit（101）It is from a left side
To right downward-sloping plane, the pit is symmetrical before and after the center line of piston left and right directions, the bottom profile of the pit
It is made up of two arc sections and the straightway tangent with two arc sections, the center of circle of two arc section is located at piston left and right directions
Center line on and be all located at the left side at top land center, and wherein closer to bump openings part arc section radius
It is less, the crater wall of the pit（102）For cambered surface, between the crater wall and the raised upper surface top for forming pit is joined
Profile.
2. the top structure of direct spray petrol engine in cylinder piston according to claim 1, it is characterised in that：In the piston
Heart axis and the angle perpendicular between the axis of the pit bottom surface are 3～8 °.
3. the top structure of direct spray petrol engine in cylinder piston according to claim 1, it is characterised in that：The hole of the pit
Wall（102）Radius of curvature be 5～8mm.
4. the top structure of direct spray petrol engine in cylinder piston according to claim 1, it is characterised in that：The bottom of the pit
Face（101）A diameter of 30～35mm of less arc section in profile, a diameter of 35～40mm of larger arc section, two circular arcs
The center of circle of section is at a distance of 8～13mm.
5. the top structure of direct spray petrol engine in cylinder piston according to claim 1, it is characterised in that：It is described raised relative
In the air inlet side flat top surface（301）, the exhaust side flat top surface（302）And the forward and backward side flat top surface（303、304）It is high
Go out 3～5mm.
6. the top structure of direct spray petrol engine in cylinder piston according to claim 1, it is characterised in that：Before the projection
Afterwards the side of both sides is the conical surface（207）, its upper and lower ends is respectively by rounding and raised upper surface and the forward and backward side flat-top
Face transition connection, the axle center of the conical surface is relative to top land center side arrangement to the left.
7. the top structure of direct spray petrol engine in cylinder piston according to claim 6, it is characterised in that：The axle of the conical surface
The heart is away from top land center 3～10mm to the left, a diameter of 60～75mm in conical surface bottom, the conical surface and the forward and backward side flat top surface
（303、304）Between angle be 30～50 °.
8. the top structure of direct spray petrol engine in cylinder piston according to claim 1, it is characterised in that：The raised top
The exhaust valve on face and right side avoided and connected by the rounding transition of R2～R5 between inclined-plane, is avoided with the inlet valve in left side and lead between inclined-plane
The rounding transition connection of R4～R12 is crossed, is connected by the rounding transition of R0.5～R1.5 between the crater wall of pit.
9. the top structure of direct spray petrol engine in cylinder piston according to claim 1, it is characterised in that：The inlet valve hole
It is connected by rounding transition between air inlet side flat top surface, is connected by rounding transition between the exhaust valve hole and exhaust side flat top surface
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410760980.5A CN104653326B (en) | 2014-12-12 | 2014-12-12 | Top structure of direct-injection gasoline engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410760980.5A CN104653326B (en) | 2014-12-12 | 2014-12-12 | Top structure of direct-injection gasoline engine piston |
Publications (2)
| Publication Number | Publication Date |
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| CN104653326A CN104653326A (en) | 2015-05-27 |
| CN104653326B true CN104653326B (en) | 2017-05-03 |
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| CN201410760980.5A Active CN104653326B (en) | 2014-12-12 | 2014-12-12 | Top structure of direct-injection gasoline engine piston |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640403A (en) * | 2016-08-29 | 2017-05-10 | 中国第汽车股份有限公司 | Tumble guide type high compression ratio piston of gasoline engine |
| CN106870120A (en) * | 2017-03-21 | 2017-06-20 | 中国第汽车股份有限公司 | A kind of high-efficiency engine combustion system |
| CN110966113A (en) * | 2018-09-30 | 2020-04-07 | 上海汽车集团股份有限公司 | Gasoline engine and piston top structure thereof |
| CN110242437B (en) * | 2019-06-28 | 2021-12-28 | 奇瑞汽车股份有限公司 | Combustion system of gasoline engine |
| CN115324766B (en) * | 2022-09-02 | 2024-01-09 | 一汽解放汽车有限公司 | Diesel engine combustion system and vehicle |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3327168B2 (en) * | 1997-05-28 | 2002-09-24 | 日産自動車株式会社 | Piston for in-cylinder injection internal combustion engine |
| JP3709675B2 (en) * | 1997-10-24 | 2005-10-26 | 日産自動車株式会社 | Piston for in-cylinder internal combustion engine |
| CN201461121U (en) * | 2009-07-30 | 2010-05-12 | 重庆长安汽车股份有限公司 | Piston |
| CN202348419U (en) * | 2011-10-29 | 2012-07-25 | 长城汽车股份有限公司 | Dual VVT (Variable Valve Timing) piston combustion chamber |
| CN202531300U (en) * | 2012-04-12 | 2012-11-14 | 宁波市鄞州德来特技术有限公司 | Direct injection piston top structure |
| CN103670776B (en) * | 2012-09-25 | 2015-12-09 | 重庆长安汽车股份有限公司 | A kind of supercharging direct-injection gasoline engine piston |
| CN203009065U (en) * | 2012-12-29 | 2013-06-19 | 重庆长安汽车股份有限公司 | Gasoline direct injection engine piston |
| CN203050906U (en) * | 2013-01-06 | 2013-07-10 | 重庆长安汽车股份有限公司 | Cylinder inside direct-injection gasoline-engine piston |
| CN204003076U (en) * | 2014-07-25 | 2014-12-10 | 重庆长安汽车股份有限公司 | A kind of direct spray type Atkinson cycle engine chamber structure |
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Effective date of registration: 20210426 Address after: 230000 No. 966 Dabie Mountain Road, hi tech Zone, Anhui, Hefei Patentee after: HEFEI CHANGAN AUTOMOBILE Co.,Ltd. Patentee after: Chongqing Changan Automobile Co.,Ltd. Address before: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Patentee before: Chongqing Changan Automobile Co.,Ltd. |