CN112302827B - Composite internal combustion engine cylinder cover - Google Patents
Composite internal combustion engine cylinder cover Download PDFInfo
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- CN112302827B CN112302827B CN202011234091.7A CN202011234091A CN112302827B CN 112302827 B CN112302827 B CN 112302827B CN 202011234091 A CN202011234091 A CN 202011234091A CN 112302827 B CN112302827 B CN 112302827B
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- cylinder cover
- cylinder
- combustion engine
- internal combustion
- hole
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Classifications
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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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4264—Shape or arrangement of intake or exhaust channels in cylinder heads of exhaust channels
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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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
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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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/242—Arrangement of spark plugs or injectors
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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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
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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
- F02F11/00—Arrangements of sealings in combustion engines
- F02F11/002—Arrangements of sealings in combustion engines involving cylinder heads
Abstract
The invention relates to a composite internal combustion engine cylinder cover, which comprises a cylinder cover body, wherein an exhaust manifold is arranged at the inner lower part of the cylinder cover body, a cooling water jacket is distributed along the periphery of the exhaust manifold, the cylinder cover body comprises an upper independent part and a lower independent part which are divided by taking the surface of the outer wall of the upper part of the cooling water jacket as a parting surface, the independent part at the upper part is a cylinder cover upper body for supporting a camshaft system, the cylinder cover upper body is integrally formed by plastic materials, the independent part at the lower part is a cylinder cover lower body which is in contact with flame in the cylinder body and bears high-temperature airflow, the cylinder cover lower body is made of metal materials, and a positioning structure is arranged at the joint of the cylinder cover lower body and the cylinder cover upper body. The original metal integral cylinder cover is split into a metal lower body and a plastic upper body, the application of plastic is expanded by utilizing the design of engine cooling, and meanwhile, a special sealing and fastening structure is designed, so that the problems of cracks, water leakage and oil leakage of different materials under the characteristics of different expansion ratios and the like are solved; the weight of the machine body is reduced, the processing technology and steps are reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to a composite internal combustion engine cylinder cover.
Background
Because the engine can generate high temperature when working and can be cooled by cooling water, the cylinder cover of the existing piston type internal combustion engine is generally made of metal materials, mainly cast iron or cast aluminum. However, cast iron generally has a large weight and a low cost, but has a high processing cost, and is widely applied to diesel engines. The aluminum cylinder covers are widely applied to gasoline engines, pollution and energy consumption of casting factories are very large in the manufacturing and production processes of metal materials, the metal cutting process is complex in the later processing process, and sewage discharge is large. Therefore, in recent years, it is difficult to start and construct engine cylinder head casting and machining factories in severely restricted areas.
With the proposal of the concept of light weight of automobiles, a plurality of parts are replaced by plastic products, but the plastic products are not applied to the cylinder cover of the internal combustion engine at present, and if the cylinder cover of the internal combustion engine is made into a full plastic part, the existing materials can not bear the high temperature of the internal combustion engine during working for a long time; if the cylinder head of the internal combustion engine is designed to be partly plastic and partly metal, three problems exist:
a. the problem of bonding and sealing of the plastic and metal head parts: since plastic materials expand more than metals, after heating, the tendency to expand is greater than metals; because cooling water flows between the cylinder body and the cylinder cover of the internal combustion engine, leakage can be brought by expansion, and the fault of the engine is caused;
b. strength retention problems of the plastic head part in operation: the strength of all modified plastics is reduced along with the rise of the temperature, and the strength influence of high temperature on the plastic cylinder cover part can be avoided by ensuring that the temperature of the plastic cylinder cover part is stabilized within a required range;
c. the plastic upper body needs to support the work of the camshaft, and the original metal structure needs to adopt a bearing bush design.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: overcomes the defects in the prior art and provides a composite type internal combustion engine cylinder cover.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a compound internal-combustion engine cylinder cap, includes the cylinder cap body, this internal lower part of cylinder cap is provided with exhaust manifold, follows exhaust manifold's periphery distributes has cooling jacket, and the cylinder cap body includes with two upper and lower independent parts that cooling jacket upper portion outer wall place face divide into for the die joint, and the independent part that is located the upper portion is the cylinder cap upper part of the body that supports the camshaft system, and it is formed by plastic material integrated into one piece, and the independent part that is located the lower part is the cylinder cap lower part of the body that contacts flame in the cylinder body and bear the high temperature air current, and it is made by metal material, and the junction of the cylinder cap lower part of the body and cylinder cap upper part of the body is equipped with location structure.
The exhaust manifold is arranged in the cylinder cover, the cooling water jacket is distributed on the periphery of the exhaust manifold, and high-temperature gas in the exhaust manifold is cooled in time by cooling liquid in the cooling water jacket, so that the temperature of the surface and the upper part of the outer wall of the upper part of the cooling water jacket can meet the strength and temperature tolerance required by the upper part of the cylinder cover made of plastic materials, and the plane can be used as a parting plane and divided into a plastic cylinder body upper body and a metal cylinder body lower body; the upper body of the plastic cylinder body is mainly used for positioning and fixing the camshaft system, and the lower body of the metal cylinder body is in contact with flame, used for high-temperature exhaust flow and used for high-temperature conduction of the valve mechanism.
Further limiting, an air outlet of high-temperature gas is arranged in the middle of one side face of the cylinder cover lower body, an air inlet is arranged on the other side of the cylinder cover lower body, the exhaust manifold is distributed in the cylinder cover lower body in a divergent mode from the air outlet, and the cooling water jacket is distributed in a divergent mode from the bottom of the cylinder cover lower body to the outer peripheral wall of the exhaust manifold and the air inlet.
According to the structure, the cooling water jacket can be arranged and also integrated in the cylinder cover lower body to flow in the whole metal inner cavity, so that the stress damage of high-temperature expansion to the metal and plastic joint surface is avoided, and the leakage of cooling water is avoided; meanwhile, the heat of high-temperature gas in the exhaust manifold is isolated through cooling of cooling water, so that the cylinder cover upper body is plasticized conditionally.
Further inject, the location structure is including setting up the chimb in cylinder cap upper part of the body bottom and being located cylinder cap lower part of the body top and chimb matched with step, the chimb sets up along cylinder cap upper part of the body bottom along the downward protrusion of round, the step is provided with the flange that the chimb was surrounded to the upward protrusion along the upper edge to when making the cylinder cap upper part of the body be heated and outwards expand, the chimb extrudees towards the flange and forms sealedly.
When the cylinder cap upper part of the body is heated and expands outwards, because the expansion ratio is different, the convex edge of the plastic expands to extrude the metal flange, so that the sealing effect is further promoted, and the leakage gap generated when the cylinder cap is heated is avoided.
And further limiting, the joint surface of the cylinder cover upper body and the cylinder cover lower body is coated with sealant or provided with a sealing ring.
So set up, play the further effect of sealed cylinder cap upper part of the body junction with the cylinder cap lower part of the body.
Further limiting, the cylinder cover upper body is respectively provided with two concave cavities for placing two camshafts along the length direction, and a plurality of upper bolt holes which are uniformly distributed are arranged on the inner walls of the outer sides of the two concave cavities in an up-and-down sinking mode; and lower bolt holes matched with the upper bolt holes are formed in the periphery of the flanges.
The upper bolt hole corresponds to the lower bolt hole, so that the upper cylinder cover body and the lower cylinder cover body can be conveniently connected together through bolts; the bolt passes through the upper bolt hole of the plastic upper body and directly taps into the lower bolt hole of the metal lower body, so that the connection strength is ensured.
In order to make the structure compact, the cavity of the cylinder cover upper body is further limited, a first through hole for the extension of the hydraulic tappet is formed in the cavity, and a second through hole for the extension of the spark plug is formed in the cylinder cover upper body between the two cavities; and a third through hole corresponding to the first through hole and used for the inlet and outlet valve to extend into and a fourth through hole corresponding to the second through hole and used for the spark plug to extend into are arranged on the cylinder cover lower body.
In order to ensure the lubrication of the camshaft system on the upper part of the cylinder cover upper body, the camshaft system is further limited, a plurality of oil holes are formed in the edge of the top of one end of the cylinder cover upper body, an oil channel protruding downwards is formed in the cylinder cover upper body on the lower part of the oil hole, and a cylindrical hole for the oil channel to extend into is formed in the cylinder cover lower body.
In order to ensure that the cylinder cover upper body has enough strength, the cylinder cover upper body is further limited to be made of modified composite materials.
Further, the modified composite material is one or more of polyphthalamide, polyphenylene sulfide, polyetherimide, polyether ether ketone or polyamide-imide, and is a high-strength, high-temperature-resistant, wear-resistant and engine oil-resistant modified material prepared by adding modifiers such as glass fiber, mineral powder or carbon fiber.
Further, the cylinder cover upper body is formed by injection molding or 3D printing; the cylinder cap lower part of the body is made through die-casting, gravity casting or metal 3D printing.
The invention has the beneficial effects that:
compared with the traditional design, the original metal integral cylinder cover is split into the metal lower body and the plastic upper body, the design of engine cooling is effectively utilized, the application scene of plastic is expanded, and meanwhile, a special sealing and fastening structure is designed, so that the problems of cracks, water leakage and oil leakage of different materials under the characteristics of different expansion ratios and the like are solved;
the weight of the engine body is greatly reduced, the processing technology and steps are reduced, the carbon emission and pollution in the production process are reduced, the production efficiency is improved, and the weight of a carrying mechanism taking an engine of the cylinder cover as power is also reduced, so that the overall oil consumption is reduced, the cruising ability of the carrying mechanism is improved, and the engine can be widely applied to various fields with high requirements on weight, including range extenders of new energy vehicles, portable generators, unmanned aerial vehicles, walking robots and the like;
in the process of developing and rapidly manufacturing sample pieces, even in mass production, the 3D printing mode can be adopted for manufacturing, so that the manufacturing cost is greatly reduced, and the manufacturing speed is increased.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a sectional view in the direction a-a of fig. 1.
Fig. 3 is a schematic structural view of the back surface of the upper body of the cylinder head in the invention.
Fig. 4 is a schematic structural view of the lower body of the cylinder head of the present invention.
Fig. 5 is a sectional view of fig. 4 in the direction B-B.
Fig. 6 is a schematic view of the structure of the cylinder head lower body of the present invention in another direction.
Fig. 7 is a sectional view in the direction C-C of fig. 6.
In the figure: 1. the cylinder cover comprises a cylinder cover body, 11 parts of an exhaust manifold, 12 parts of a cooling water jacket, 13 parts of a cylinder cover upper body, 14 parts of a cylinder cover lower body, 15 parts of an air outlet, 16 parts of an air inlet, 131 parts of a convex edge, 132 parts of an upper bolt hole, 133 parts of a first through hole, 134 parts of a second through hole, 135 parts of an oil hole, 136 parts of an oil channel, 141 parts of a step, 142 parts of a baffle edge, 143 parts of a lower bolt hole, 144 parts of a third through hole, 145 parts of a fourth through hole and 146 parts of a cylindrical hole.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1 to 7, a composite internal combustion engine cylinder head comprises a cylinder head body 1, an exhaust manifold 11 is arranged at the inner lower part of the cylinder head body 1, a cooling water jacket 12 is distributed along the periphery of the exhaust manifold 11, the cylinder head body 1 comprises an upper independent part and a lower independent part which are divided by taking the plane of the outer wall of the upper part of the cooling water jacket 12 as a parting plane, the independent part at the upper part is a cylinder head upper body 13 for supporting a camshaft system, which is integrally formed by plastic materials, the independent part at the lower part is a cylinder cover lower body 14 which is contacted with flame in the cylinder body and bears high-temperature airflow, which is made of metal material, a gas outlet 15 of high temperature gas is arranged on the middle part of one side surface of the cylinder cover lower body 14, the other side is provided with an air inlet 16, the exhaust manifold 11 is distributed in the cylinder cover lower body 14 in a divergent manner from an air outlet 15, and the cooling water jacket 12 is distributed in a divergent and extended manner from the bottom of the cylinder cover lower body 14 to the outer peripheral wall of the exhaust manifold 11 and the air inlet 16;
the joint of the cylinder cover lower body 14 and the cylinder cover upper body 13 is provided with a positioning structure, the positioning structure comprises a flange 131 arranged at the bottom of the cylinder cover upper body 13 and a step 141 located at the top of the cylinder cover lower body 14 and matched with the flange 131, the flange 131 is arranged along the bottom edge of the cylinder cover upper body 13 in a downward protruding manner, a ring of retaining edge 142 surrounding the flange 131 is arranged along the outer edge of the step 141 in a protruding manner, so that when the cylinder cover upper body is heated and expands outwards, the flange 131 extrudes towards the retaining edge 142 to form a seal.
This embodiment is with the design of cylinder cap body 1 lower part for metal material, has isolated the exhaust gas of high temperature to make cylinder cap body 1 internal cooling water jacket 12 give the flow in whole metal inner chamber simultaneously, avoided the stress damage of high temperature expansion to metal and plastics composition surface, avoided revealing of cooling water.
In production, the joint surface of the cylinder head upper body 13 and the cylinder head lower body 14 may be coated with sealant or provided with a sealing ring to achieve a further sealing effect.
The cylinder cover upper body 13 is respectively provided with two concave cavities 131 for placing two camshafts along the length direction, and the inner walls of the outer sides of the two concave cavities 131 are provided with a plurality of upper bolt holes 132 which are uniformly distributed in an up-and-down sinking manner; the rib 142 is provided at its outer periphery with a lower bolt hole 143 which is engaged with the upper bolt hole 132. A first through hole 133 for the extension of the hydraulic tappet is arranged in the cavity 131 of the cylinder cover upper body 13, and a second through hole 134 for the extension of the spark plug is arranged on the cylinder cover upper body 13 between the two cavities 131; the head lower body 14 is provided with a third through hole 144 corresponding to the first through hole 132 and into which an intake valve and an exhaust valve extend, and a fourth through hole 145 corresponding to the second through hole 134 and into which a spark plug extends.
In addition, a plurality of oil holes 135 are formed on the top edge of one end of the cylinder cover upper body 13, an oil passage 136 protruding downwards is formed on the cylinder cover upper body 13 below one oil hole 135, and a cylindrical hole 146 for the oil passage 136 to extend into is formed on the cylinder cover lower body 14.
The plastic material is selected to ensure that the divided plastic cylinder cover upper body 13 has sufficient strength, and preferably, the plastic material adopted by the cylinder cover upper body 13 is a modified composite material; specifically, the modified composite material is one or more of polyphthalamide, polyphenylene sulfide, polyetherimide, polyether ether ketone or polyamide-imide, and is a high-strength, high-temperature-resistant, wear-resistant and engine oil-resistant modified material prepared by adding modifiers such as glass fibers, mineral powder or carbon fibers.
The cylinder cover upper body 13 is formed by injection molding or 3D printing; the cylinder cover lower part 14 is manufactured by die casting, gravity casting or metal 3D printing, so that the production process cost and energy consumption are greatly reduced, and the weight is greatly reduced. By adopting the composite internal combustion engine cylinder cover of the embodiment, the weight of the cast iron cylinder cover can be reduced by 80%, and the weight of the aluminum cylinder cover can be reduced by 10-30%, so that the weight of the whole system is reduced, and the carbon emission is reduced.
The cylinder head upper body 13 and the cylinder head lower body 14 are positioned and sealed by the positioning structure, and the bolts are screwed to ensure the connection and fixation. After the assembly is finished, the top and the bottom of the cylinder cover body 1 are machined, and the requirements on roughness and flatness are met.
The embodiment is only carried out on the basis of the cylinder cover of the 2-cylinder engine, and the structure and the design can be applied to the cylinder cover of the engine with any cylinder number, including but not limited to the cylinder covers of common single-cylinder engines, in-line 4-cylinder engines, V6 and other engines.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (10)
1. The utility model provides a compound internal-combustion engine cylinder cap, includes the cylinder cap body, its characterized in that: the cylinder cover comprises a cylinder cover body and is characterized in that an exhaust manifold is arranged at the inner lower part of the cylinder cover body, a cooling water jacket is distributed along the periphery of the exhaust manifold, the cylinder cover body comprises an upper independent part and a lower independent part, the upper independent part is divided into the upper independent part and the lower independent part by taking the surface of the outer wall of the upper part of the cooling water jacket as a parting surface, the independent part positioned at the upper part is a cylinder cover upper body for supporting a camshaft system and is integrally formed by plastic materials, the independent part positioned at the lower part is a cylinder cover lower body which is in contact with flame in the cylinder body and bears high-temperature airflow, the cylinder cover lower body is made of metal materials, and a positioning structure is arranged at the joint of the cylinder cover lower body and the cylinder cover upper body.
2. A composite internal combustion engine cylinder head according to claim 1, characterised in that: the cooling water jacket is divergently extended and distributed from the bottom of the cylinder cover lower body to the peripheral wall of the exhaust manifold and the air inlet.
3. A composite internal combustion engine cylinder head according to claim 1, characterised in that: the positioning structure comprises a convex edge arranged at the bottom of the upper body of the cylinder cover and a step which is arranged at the top of the lower body of the cylinder cover and matched with the convex edge, the convex edge is arranged along the bottom of the upper body of the cylinder cover in a downward protruding mode along a circle, and a circle of retaining edge surrounding the convex edge is arranged on the outer edge of the step in a protruding mode so that the convex edge extrudes towards the retaining edge to form sealing when the upper body of the cylinder cover is heated to expand outwards.
4. A compound internal combustion engine cylinder head according to claim 3, characterized in that: and the joint surface of the upper cylinder cover body and the lower cylinder cover body is coated with sealant or provided with a sealing ring.
5. A compound internal combustion engine cylinder head according to claim 3, characterized in that: the upper body of the cylinder cover is respectively provided with two concave cavities for placing two camshafts along the length direction, and the inner walls of the outer sides of the two concave cavities are provided with a plurality of upper bolt holes which are uniformly distributed in an up-and-down sinking manner; and lower bolt holes matched with the upper bolt holes are formed in the periphery of the flanges.
6. A compound internal combustion engine cylinder head according to claim 5, characterized in that: a first through hole for the extension of the hydraulic tappet is formed in the cavity of the cylinder cover upper body, and a second through hole for the extension of the spark plug is formed in the cylinder cover upper body between the two cavities; and a third through hole corresponding to the first through hole and used for the inlet and outlet valve to extend into and a fourth through hole corresponding to the second through hole and used for the spark plug to extend into are arranged on the cylinder cover lower body.
7. A composite internal combustion engine cylinder head according to claim 1, characterised in that: the cylinder cover is characterized in that a plurality of oil holes are formed in the edge of the top of one end of the upper cylinder cover body, an oil channel protruding downwards is formed in the upper cylinder cover body on the lower portion of one oil hole, and a cylindrical hole for the oil channel to extend into is formed in the lower cylinder cover body.
8. A composite internal combustion engine cylinder head according to claim 1, characterised in that: the upper body of the cylinder cover is made of modified composite materials.
9. A compound internal combustion engine cylinder head according to claim 8, wherein: the modified composite material is one or more of polyphthalamide, polyphenylene sulfide, polyetherimide, polyether ether ketone or polyamide-imide, and is a high-strength, high-temperature-resistant, wear-resistant and engine oil-resistant modified material prepared by adding a glass fiber, mineral powder or carbon fiber modifier.
10. A composite internal combustion engine cylinder head according to claim 1, characterised in that: the cylinder cover upper body is formed by injection molding or 3D printing; the cylinder cap lower part of the body is made through die-casting, gravity casting or metal 3D printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011234091.7A CN112302827B (en) | 2020-11-07 | 2020-11-07 | Composite internal combustion engine cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011234091.7A CN112302827B (en) | 2020-11-07 | 2020-11-07 | Composite internal combustion engine cylinder cover |
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| Publication Number | Publication Date |
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| CN112302827A CN112302827A (en) | 2021-02-02 |
| CN112302827B true CN112302827B (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011234091.7A Active CN112302827B (en) | 2020-11-07 | 2020-11-07 | Composite internal combustion engine cylinder cover |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5657729A (en) * | 1995-08-16 | 1997-08-19 | Northrop Grumman Corporation | Fiber reinforced ceramic matrix composite cylinder head and cylinder head liner for an internal combustion engine |
| CN102678381A (en) * | 2011-03-18 | 2012-09-19 | 通用汽车环球科技运作有限责任公司 | Cylinder head housing for internal combustion engine |
| CN203702366U (en) * | 2013-12-31 | 2014-07-09 | 北京中材汽车复合材料有限公司 | Fiber reinforced plastic cylinder cover of engine |
| CN105863866A (en) * | 2015-02-11 | 2016-08-17 | 福特全球技术公司 | Hybrid composite cylinder head |
| CN106870194A (en) * | 2015-09-08 | 2017-06-20 | 福特全球技术公司 | For the cylinder cover of explosive motor |
-
2020
- 2020-11-07 CN CN202011234091.7A patent/CN112302827B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5657729A (en) * | 1995-08-16 | 1997-08-19 | Northrop Grumman Corporation | Fiber reinforced ceramic matrix composite cylinder head and cylinder head liner for an internal combustion engine |
| CN102678381A (en) * | 2011-03-18 | 2012-09-19 | 通用汽车环球科技运作有限责任公司 | Cylinder head housing for internal combustion engine |
| CN203702366U (en) * | 2013-12-31 | 2014-07-09 | 北京中材汽车复合材料有限公司 | Fiber reinforced plastic cylinder cover of engine |
| CN105863866A (en) * | 2015-02-11 | 2016-08-17 | 福特全球技术公司 | Hybrid composite cylinder head |
| CN106870194A (en) * | 2015-09-08 | 2017-06-20 | 福特全球技术公司 | For the cylinder cover of explosive motor |
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| CN112302827A (en) | 2021-02-02 |
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