CN215927586U - Cylinder cap, engine and car - Google Patents
Cylinder cap, engine and car Download PDFInfo
- Publication number
- CN215927586U CN215927586U CN202121434179.3U CN202121434179U CN215927586U CN 215927586 U CN215927586 U CN 215927586U CN 202121434179 U CN202121434179 U CN 202121434179U CN 215927586 U CN215927586 U CN 215927586U
- Authority
- CN
- China
- Prior art keywords
- region
- thickness coating
- coating
- cylinder
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model provides a cylinder cover, an engine and an automobile, and relates to the technical field of vehicles. The cylinder cover comprises a cylinder cover main body and a heat insulation coating; the bottom surface of the cylinder cover main body is provided with a combustion surface corresponding to a combustion chamber of the engine, and the combustion surface is provided with two inlet valves and two exhaust valves; the thermal barrier coating includes a high thickness coating, a medium thickness coating, and a low thickness coating. The engine includes a cylinder block and a cylinder head. The vehicle includes an engine. Through set up adiabatic coating on the bottom surface at the cylinder cap, adiabatic coating includes high thickness coating, well thickness coating and low thickness coating, the position at high thickness coating place is the region that cylinder cap bottom surface temperature is high, the position at well thickness coating place is the region that cylinder cap bottom surface temperature is higher, the position at low thickness coating place is the region that cylinder cap bottom surface temperature is lower to effectively reduce the cylinder block in the cylinder block combustion process cylinder cap heat transfer capacity of engine, and then can improve the effective thermal efficiency of engine.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a cylinder cover, an engine and an automobile.
Background
Improving the effective thermal efficiency of the engine is the main research direction of the engine. The engine is a main component of an automobile, and the engine is an engine that generates combustion gas by burning fuel and directly acts on a piston, a turbine blade, and the like to convert thermal energy of the fuel into mechanical work.
In the prior art, an engine comprises a cylinder cover, a cylinder body, a cylinder sleeve and a piston, wherein the cylinder cover is arranged above the cylinder body, the cylinder sleeve and the piston are arranged in the cylinder body, and the cylinder cover, the cylinder sleeve and the piston form a combustion chamber together. The cylinder cover is provided with an inlet valve and an exhaust valve, valve rods are arranged in the inlet valve and the exhaust valve, and the opening and closing of the inlet valve and the exhaust valve are controlled by the valve rods in the working process of the engine, so that fresh air or fuel gas is sucked from the inlet valve, and combusted waste gas is discharged from the exhaust valve.
However, the heat generated by combustion in the cylinder of the engine is transferred and dissipated more by the cylinder head.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cylinder cover, an engine and an automobile, and aims to solve the problem that the heat generated by combustion in a cylinder body of the engine is transferred and dissipated more by the cylinder cover.
In one aspect, the present invention provides a cylinder head comprising a cylinder head body and a thermal insulation coating;
the bottom surface of the cylinder cover main body is provided with a combustion surface corresponding to a combustion chamber of an engine, the combustion surface is provided with two inlet valves and two exhaust valves, the central connecting line of the two inlet valves is parallel to the connecting line of the two exhaust valves, the inlet valves are used for opening and closing an air inlet passage, and the exhaust valves are used for opening and closing an exhaust passage;
adiabatic coating is located on the bottom surface of cylinder cap main part, adiabatic coating includes high thickness coating, well thickness coating and low thickness coating, high thickness coating sets up two in the relative region of exhaust valve, well thickness coating sets up two the outside in the relative region of exhaust valve, low thickness coating sets up two in the relative region of intake valve and two the outside in the relative region of intake valve.
Optionally, the combustion surface is circular, and the combustion surface is further provided with an injector hole, and the injector hole is located in the center of the combustion surface.
Optionally, the combustion surface comprises a first region, a second region and a third region, wherein the first region is defined by two exhaust valves and two parallel common tangents of the two exhaust valves, the second region is defined by two intake valves, two common tangents of the two intake valves, which are close to the two exhaust valves, and a critical edge of the combustion surface, and the third region is defined by two exhaust valves, two parallel common tangents of the two exhaust valves, two common tangents of the two intake valves, which are close to the two exhaust valves, and a critical edge of the combustion surface;
the high-thickness coating is disposed in the first region, the medium-thickness coating is disposed in the third region, and the low-thickness coating is disposed in the second region.
Optionally, the thickness of the high-thickness coating is 0.4mm to 0.8mm, the thickness of the medium-thickness coating is 0.2mm to 0.4mm, and the thickness of the low-thickness coating is 0.1mm to 0.2 mm.
Optionally, the ratio of the thickness values of the high thickness coating, the medium thickness coating and the low thickness coating is 4:2: 1.
Optionally, a portion of the injector bore is in the second region and another portion of the injector bore is in the third region, the area of the injector bore in the second region being smaller than the area of the injector bore in the third region.
Optionally, the material of the high-thickness coating, the medium-thickness coating and the low-thickness coating is zirconia or alumina.
Optionally, the number of the combustion surfaces is multiple, the multiple combustion surfaces are arranged at intervals, and two intake valves and two exhaust valves are arranged in each combustion surface.
In another aspect, the utility model further provides an engine, which comprises a cylinder body and the cylinder cover;
the cylinder cover is detachably mounted on the cylinder body.
In still another aspect, the utility model further provides an automobile comprising the engine.
The utility model provides a cylinder cover, an engine and an automobile.A heat insulation coating is arranged on the bottom surface of the cylinder cover and comprises a high-thickness coating, a medium-thickness coating and a low-thickness coating, wherein the high-thickness coating is positioned in a region with high temperature on the bottom surface of the cylinder cover, the medium-thickness coating is positioned in a region with high temperature on the bottom surface of the cylinder cover, and the low-thickness coating is positioned in a region with low temperature on the bottom surface of the cylinder cover, so that the heat transfer quantity of the cylinder cover in the combustion process in the cylinder body of the engine can be effectively reduced, and the effective thermal efficiency of the engine can be further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a cylinder head main body according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a thermal barrier coating according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another cylinder head body according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an engine according to an embodiment of the present invention.
Description of reference numerals:
1-a cylinder cover; 10-a cylinder head body; 101-a combustion surface; 1011-a first area;
1012-a second region; 1013-a third region; 11-an intake valve; 12-an exhaust valve;
13-injector orifice; 20-a thermally insulating coating; 21-high thickness coating; 22-medium thickness coating;
23-low thickness coating; 2-cylinder body; 3-cylinder sleeve; 4-a piston;
5-a combustion chamber; 6-connecting rod; 7-crankshaft shank; 8-engine.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the prior art, an engine comprises a cylinder cover, a cylinder body, a cylinder sleeve and a piston, wherein the cylinder cover is arranged above the cylinder body, the cylinder sleeve and the piston are arranged in the cylinder body, and the cylinder cover, the cylinder sleeve and the piston form a combustion chamber together. The cylinder cover is provided with an inlet valve and an exhaust valve, valve rods are arranged in the inlet valve and the exhaust valve, and the opening and closing of the inlet valve and the exhaust valve are controlled by the valve rods in the working process of the engine, so that fresh air or fuel gas is sucked from the inlet valve, and combusted waste gas is discharged from the exhaust valve.
However, the heat generated by combustion in the cylinder of the engine is transferred and dissipated more by the cylinder head.
In order to solve the above problems, embodiments of the present invention provide a cylinder head, an engine, and an automobile, where a thermal insulation coating is disposed on a bottom surface of the cylinder head, the thermal insulation coating includes a high thickness coating, a medium thickness coating, and a low thickness coating, the high thickness coating is located in a region where a temperature of the bottom surface of the cylinder head is high, the medium thickness coating is located in a region where a temperature of the bottom surface of the cylinder head is high, and the low thickness coating is located in a region where a temperature of the bottom surface of the cylinder head is low, so that a heat transfer amount of the cylinder head during combustion in a cylinder body of the engine is effectively reduced, and an effective thermal efficiency of the engine is further improved.
The cylinder head, the engine and the automobile provided by the utility model are described in detail with reference to specific embodiments.
Fig. 1 is a schematic structural diagram of a cylinder head main body according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a thermal barrier coating according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of another cylinder head body according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of an engine according to an embodiment of the present invention.
As shown in fig. 1 and 2, an embodiment of the present invention provides a cylinder head 1 including a cylinder head main body 10 and a heat insulating coating 20.
Wherein the cylinder head 1 is fixed to the cylinder block 2 of the engine by bolts. The cylinder head 1 forms together with the cylinder liner 3 and the piston 4 of the engine a combustion chamber 5. The surface of the cylinder head 1 facing the combustion chamber 5 of the engine is a combustion surface 101, and the combustion surface 101 is located on the bottom surface of the cylinder head body 10. The combustion surface 101 is circular in shape.
Two intake valves 11 and two exhaust valves 12 are provided on the combustion surface 101, and the intake valves 11 and the exhaust valves 12 are both circular in shape. The centre lines of the two inlet valves 11 are parallel to the centre lines of the two exhaust valves 12. Be provided with two intake ducts and two exhaust passages in the cylinder cap main part 10, be provided with the air intake valve pole in the intake duct, can control the switching of (air) intake valve 11 through the air intake valve pole, be provided with the exhaust valve pole in the exhaust passage, can control the switching of exhaust valve 12 through the exhaust valve pole to the realization inhales fresh air or gas from (air) intake valve 11, follows the exhaust valve 12 exhaust waste gas after the burning.
An injector hole 13 is also provided in the combustion surface 101, the injector hole 13 being located in the center of the combustion surface 101.
The heat insulating coating 20 is located on the bottom surface of the cylinder head main body 10, and includes a high thickness coating 21, a medium thickness coating 22, and a low thickness coating 23, the high thickness coating 21 being provided in a region where the two exhaust valves 12 oppose each other, the medium thickness coating 22 being provided outside the region where the two exhaust valves 12 oppose each other, and the low thickness coating 23 being provided in a region where the two intake valves 11 oppose each other and outside the region where the two intake valves 11 oppose each other. During combustion in the cylinder block 2 of the engine, the temperature of the region where the two exhaust valves 12 oppose each other on the bottom surface of the head main body 10 is higher than the temperature of the outside of the region where the two exhaust valves 12 oppose each other, and the temperature of the outside of the region where the two exhaust valves 12 oppose each other is higher than the temperature of the inside of the region where the two intake valves 11 oppose each other and the outside of the region where the two intake valves 11 oppose each other. The high-thickness coating 21 is arranged on the area, opposite to the two exhaust valves 12, on the bottom surface of the cylinder cover 1, the middle-thickness coating 22 is arranged on the outer side of the area, opposite to the two exhaust valves 12, the low-thickness coating 23 is arranged in the area, opposite to the two intake valves 11, of the two intake valves 11 and on the outer side of the area, opposite to the two intake valves 11, of the high-thickness coating 21, the thickness of the high-thickness coating 21 is larger than that of the middle-thickness coating 22, the thickness of the middle-thickness coating 22 is larger than that of the low-thickness coating 23, therefore, the heat transfer quantity of the cylinder cover 1 in the process of combustion in the cylinder body of the engine is effectively reduced, and further the effective thermal efficiency of the engine can be improved.
The high-thickness coating 21, the medium-thickness coating 22 and the low-thickness coating 23 are made of zirconia or alumina.
It should be noted that the region surrounded by the thermal insulation coating 20 may coincide with the region where the combustion surface 101 is located. In other implementations, the region surrounded by the thermal barrier coating 20 may include the region where the combustion face 101 is located, and is not specifically configured here.
It should also be noted that by providing the high-thickness coating 21 on the area of the bottom surface of the cylinder head 1 where the two exhaust valves 12 are opposite, the heat transfer amount of the cylinder head 1 during the combustion process in the cylinder of the engine can be reduced, and the thermal stress concentration in the area of the bottom surface of the cylinder head 1 where the two exhaust valves 12 are opposite can be avoided, so that the overall reliability of the cylinder head 1 can be improved.
Optionally, the combustion face 101 includes a first region 1011, a second region 1012, and a third region 1013.
The first area 1011 is an area surrounded by two exhaust valves 12 and two parallel common tangents of the two exhaust valves 12; the second region 1012 is a region surrounded by the two intake valves 11, common tangents to the two exhaust valves 12 on the two intake valves 11, and a critical edge of the combustion surface 101; third region 1013 is a region surrounded by two exhaust valves 12, two parallel common tangents to two exhaust valves 12, common tangents to two exhaust valves 12 on two intake valves 11, and a critical edge of combustion surface 101. The high thickness coating 21 is disposed in the first region 1011, the medium thickness coating 22 is disposed in the third region 1013, and the low thickness coating 23 is disposed in the second region 1012.
In an alternative embodiment, during combustion in the block 2 of the engine, the temperature of the first zone 1011 of the combustion surface 101 on the bottom surface of the head body 10 is higher than the temperature of the third zone 1013, and the temperature of the third zone 1013 is higher than the temperature of the second zone 1012. The high-thickness coating 21 is arranged on the first area 1011 of the combustion surface 101 on the bottom surface of the cylinder cover 1, the medium-thickness coating 22 is arranged on the third area 1013, the low-thickness coating 23 is arranged on the second area 1012, the thickness of the high-thickness coating 21 is 0.4-0.8 mm, the thickness of the medium-thickness coating 22 is 0.2-0.4 mm, and the thickness of the low-thickness coating 23 is 0.1-0.2 mm, so that the heat transfer quantity of the cylinder cover 1 in the cylinder body combustion process of the engine is effectively reduced, and the effective heat efficiency of the engine can be improved. Preferably, the ratio of the thickness values of the high-thickness coating 21, the medium-thickness coating 22 and the low-thickness coating 23 is 4:2: 1.
It is noted that a portion of the injector bore 13 is within the second region 1012, another portion of the injector bore 13 is within the third region 1013, and the area of the injector bore 13 within the second region 1012 is less than the area of the injector bore within the third region 1013.
Optionally, when the engine comprises a plurality of combustion chambers 5, the bottom surface of the cylinder head 1 is provided with the same number of combustion surfaces 101 as the number of the combustion chambers, two intake valves 11 and two exhaust valves 12 are arranged in each combustion surface 101, and a heat insulation coating 20 is arranged on each combustion surface 101, so that the heat transfer capacity of the cylinder head during the combustion process in the cylinder of the engine is effectively reduced, and the effective thermal efficiency of the engine can be improved. For example, a cylinder head 1 provided as shown in fig. 3 is provided with three combustion surfaces 101 on the bottom surface.
As shown in fig. 4, the embodiment of the present invention further provides an engine 8 including a cylinder block 2, a cylinder liner 3, a piston 4, a connecting rod 6, a crank shaft 7, and a cylinder head 1. The cylinder cover 1 is detachably arranged on the cylinder body 2, the cylinder sleeve 3 is arranged in the cylinder body 2, the piston 4 is arranged in the cylinder sleeve 3 in a sliding mode, the connecting rod 6 is connected with the piston 4, and the crank shaft 7 is connected with the connecting rod 6.
The cylinder head 1 in this embodiment has the same structure as the cylinder head provided in any of the above embodiments, and can bring about the same or similar technical effects, and details are not repeated here, and reference may be specifically made to the description of the above embodiments.
The embodiment of the utility model also provides an automobile which comprises the engine 8.
The engine 8 in this embodiment has the same structure as the engine provided in any of the embodiments described above, and can bring about the same or similar technical effects, and therefore, the details are not repeated herein, and specific reference can be made to the description of the embodiments described above.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A cylinder cover is characterized by comprising a cylinder cover main body and a heat insulation coating;
the bottom surface of the cylinder cover main body is provided with a combustion surface corresponding to a combustion chamber of an engine, the combustion surface is provided with two inlet valves and two exhaust valves, the central connecting line of the two inlet valves is parallel to the connecting line of the two exhaust valves, the inlet valves are used for opening and closing an air inlet passage, and the exhaust valves are used for opening and closing an exhaust passage;
adiabatic coating is located on the bottom surface of cylinder cap main part, adiabatic coating includes high thickness coating, well thickness coating and low thickness coating, high thickness coating sets up two in the relative region of exhaust valve, well thickness coating sets up two the outside in the relative region of exhaust valve, low thickness coating sets up two in the relative region of intake valve and two the outside in the relative region of intake valve.
2. The cylinder head of claim 1, wherein the combustion surface is circular in shape, and an injector hole is further disposed on the combustion surface and located at the center of the combustion surface.
3. The cylinder head of claim 2, wherein the combustion surface includes a first region, a second region and a third region, the first region is defined by two exhaust valves and two parallel common tangents of the two exhaust valves, the second region is defined by two intake valves, a common tangent of the two intake valves near the two exhaust valves and a critical edge of the combustion surface, and the third region is defined by two exhaust valves, two parallel common tangents of the two exhaust valves, a common tangent of the two intake valves near the two exhaust valves and a critical edge of the combustion surface;
the high-thickness coating is disposed in the first region, the medium-thickness coating is disposed in the third region, and the low-thickness coating is disposed in the second region.
4. The cylinder head according to claim 3, characterized in that said high-thickness coating has a thickness comprised between 0.4mm and 0.8mm, said medium-thickness coating has a thickness comprised between 0.2 and 0.4mm, and said low-thickness coating has a thickness comprised between 0.1mm and 0.2 mm.
5. The cylinder head of claim 4, characterized in that the ratio of the thickness values of the high-thickness coating, the medium-thickness coating and the low-thickness coating is 4:2: 1.
6. The cylinder head of claim 3, wherein a portion of said injector bore is in said second region and another portion of said injector bore is in said third region, said injector bore having an area in said second region that is less than an area of said injector bore in said third region.
7. The cylinder head according to any one of claims 1 to 6, characterized in that the material of said high-thickness coating, said medium-thickness coating and said low-thickness coating is zirconia or alumina.
8. The cylinder head of any one of claims 1-6, characterized in that the number of the combustion surfaces is multiple, the multiple combustion surfaces are arranged at intervals, and two intake valves and two exhaust valves are arranged in each combustion surface.
9. An engine, characterized by comprising a cylinder block and a cylinder head according to any one of claims 1-8;
the cylinder cover is detachably mounted on the cylinder body.
10. An automobile comprising the engine of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121434179.3U CN215927586U (en) | 2021-06-25 | 2021-06-25 | Cylinder cap, engine and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121434179.3U CN215927586U (en) | 2021-06-25 | 2021-06-25 | Cylinder cap, engine and car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215927586U true CN215927586U (en) | 2022-03-01 |
Family
ID=80399026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121434179.3U Active CN215927586U (en) | 2021-06-25 | 2021-06-25 | Cylinder cap, engine and car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215927586U (en) |
-
2021
- 2021-06-25 CN CN202121434179.3U patent/CN215927586U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2175116B1 (en) | Internal combustion engine | |
| US8813734B2 (en) | Heat-insulating structure | |
| JP5082987B2 (en) | Internal combustion engine | |
| US9470133B2 (en) | Engine having integrated exhaust manifold with combined ducts for inside cylinders and outside cylinders | |
| US4953528A (en) | Direct injection-type diesel engines | |
| CN215927586U (en) | Cylinder cap, engine and car | |
| JPS61142320A (en) | Combustion chamber of diesel engine | |
| JP2014234740A (en) | Compression ignition type internal combustion engine | |
| WO2018198786A1 (en) | Internal-combustion engine piston, and method for controlling cooling of internal-combustion engine piston | |
| CN112682206A (en) | Combined structure heat insulation cylinder cover | |
| CN105275657B (en) | Integral cylinder cover of diesel engine with parallel air valves | |
| CN213598082U (en) | Cylinder cover for four-air valve diesel engine and diesel engine | |
| CN112963238B (en) | An adiabatic internal combustion engine combustion system based on adiabatic combustion chamber and Miller cycle | |
| CN114017190B (en) | Combustion system of engine, engine and automobile | |
| US11905910B2 (en) | Cooling apparatus | |
| CN111102095B (en) | Low heat dissipation composite structure piston | |
| CN108518287A (en) | Piston and engine assembly | |
| CN208122972U (en) | piston and engine assembly | |
| CN214092021U (en) | Improved exhaust passage of diesel internal combustion engine | |
| CN221074428U (en) | Diesel engine combustion chamber structure and diesel engine | |
| CN222066900U (en) | Cylinder head water jacket and vehicle | |
| CN114562361A (en) | Gasoline engine | |
| CN219061861U (en) | Engine cylinder cover and engine | |
| CN212958885U (en) | Engine piston | |
| JP4248521B2 (en) | In-cylinder direct injection internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |