Cylinder cover assembly and hydrogen engine
By introducing a water jacket structure to cover the spark plug bushing in the cylinder head assembly of the hydrogen engine and using coolant for cooling, the problem of pre-ignition knocking caused by excessively high spark plug and cylinder head temperatures is solved, thus improving the engine's stability and safety.
Patent Information
- Application Number
- CN202422823306.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-11-19
AI Technical Summary
In existing hydrogen engines, the spark plugs and cylinder head temperatures are too high during ignition, leading to frequent pre-ignition and knocking problems.
Design a cylinder head assembly comprising a cylinder head body, a spark plug bushing, and a water jacket structure. The water jacket structure covers the connection section of the spark plug bushing, cools it with coolant, and achieves a sealed connection through a sealing ring and interference fit, thereby reducing the temperature of the spark plug and cylinder head.
It effectively reduces the temperature of spark plugs and cylinder heads, reduces the occurrence of pre-ignition knock, and improves the stability and safety of hydrogen engines.
Smart Images
Figure CN223814106U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hydrogen engine technical field especially a cylinder head assembly and hydrogen engine. BACKGROUND
[0002] As a renewable fuel, hydrogen gas becomes a development direction of the future as a fuel to replace hydrogen engine as a power source of vehicle, but in the process of igniting hydrogen engine, the cooling capacity of spark plug bushing to spark plug is limited, which will make the local temperature of spark plug and the local temperature of cylinder head too high, resulting in the problem of early combustion knock of hydrogen engine. SUMMARY
[0003] Therefore, the utility model embodiment provides a cylinder head assembly and hydrogen engine, which can effectively reduce the temperature of the cylinder head assembly and the spark plug, thereby reducing the occurrence of early combustion knock.
[0004] In a first aspect, the utility model embodiment provides a cylinder head assembly, which comprises a cylinder head body, a spark plug bushing and a water jacket structure, the cylinder head body is provided with a mounting hole, the mounting hole passes through the water jacket structure, the spark plug bushing is arranged in the mounting hole, the spark plug bushing comprises a connecting section, and the connecting section is used for being connected with a spark plug, wherein: in the projection of the axis of the mounting hole, the water jacket structure covers part of the connecting section.
[0005] In the cylinder head assembly, the connecting section of the spark plug bushing is used for being connected with the spark plug, and the water jacket structure covers at least part of the connecting section, so that the connecting section of the spark plug bushing can be effectively cooled, thereby cooling the spark plug and the part of the cylinder head body corresponding to the spark plug, and reducing the occurrence of early combustion knock. In addition, the water jacket structure can also cool other parts of the spark plug bushing and other parts of the cylinder head, so that the temperature of the cylinder head assembly and the spark plug can be effectively reduced.
[0006] In one embodiment, the spark plug bushing further comprises a main body section, the main body section and the connecting section are fixedly connected, and the inner diameter of the main body section is greater than the inner diameter of the connecting section.
[0007] In one embodiment, the mounting hole comprises a first mounting section and a second mounting section in communication with each other, the main body section is arranged in the first mounting section, the connecting section is arranged in the second mounting section, and the connecting section is in interference fit with the second mounting section.
[0008] In one embodiment, the connecting section is provided with an internal thread, and the internal thread is used for being connected with the spark plug.
[0009] In one embodiment, the water jacket structure comprises an upper water jacket, a lower water jacket and a connecting jacket, the upper water jacket and the lower water jacket are communicated with each other through the connecting jacket, and the connecting jacket and the lower water jacket cover part of the connecting section in the projection of the mounting hole axis.
[0010] In one embodiment, the size of the connecting jacket is smaller than the size of the lower water jacket and the upper water jacket.
[0011] In one embodiment, the cylinder head assembly further comprises a sealing ring, which is arranged between the inner wall of the mounting hole and the spark plug bushing.
[0012] In one embodiment, the material of the spark plug bushing is stainless steel.
[0013] In one embodiment, the axis of the main body section and the axis of the connecting section coincide.
[0014] In a second aspect, the application further provides a hydrogen engine comprising the cylinder head assembly of any of the technical solutions in the first aspect. The hydrogen engine has the same beneficial effects as the cylinder head assembly, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 A structural schematic diagram of the cylinder head assembly provided by the embodiments of the present application.
[0016] Figure legend: 10-cylinder head body; 20-spark plug bushing; 21-connecting section; 22-main body section; 30-water jacket structure; 31-upper water jacket; 32-lower water jacket; 40-sealing ring. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0018] The cylinder head assembly provided by the embodiments of the present application will be specifically described below with reference to the drawings.
[0019] Figure 1 A structural schematic diagram of the cylinder head assembly provided by the embodiments of the present application. Refer to Figure 1The cylinder head assembly comprises a cylinder head body 10, a spark plug bushing 20 and a water jacket structure 30. The cylinder head body 10 is provided with a mounting hole extending along the thickness direction of the cylinder head body 10, the mounting hole can pass through the water jacket structure 30, the spark plug bushing 20 is arranged in the mounting hole, and the spark plug bushing 20 can comprise a connecting section 21 for connecting the spark plug. In the projection of the axis of the mounting hole, the water jacket structure 30 covers part of the connecting section 21.
[0020] In the cylinder head assembly in the application, the connecting section 21 of the spark plug bushing 20 is used for connecting the spark plug, and the water jacket structure 30 covers at least part of the connecting section 21, so that the connecting section 21 of the spark plug bushing 20 can be effectively cooled, thereby cooling the spark plug and the part of the cylinder head body 10 corresponding to the spark plug, and reducing the occurrence of pre-ignition knocking. In addition, the water jacket structure 30 can also cool other parts of the spark plug bushing 20 and other parts of the cylinder head, which can effectively reduce the temperature of the cylinder head assembly and the spark plug.
[0021] The spark plug bushing 20 further comprises a main body section 22 fixedly connected with the connecting section 21, and the inner diameter of the main body section 22 is greater than that of the connecting section 21. The main body section 22 and the connecting section 21 are integrally formed. An internal thread is arranged in the connecting section 21, and the length of the internal thread can be the same as that of the connecting section 21. The spark plug can be detachably connected with the connecting section 21 through the internal thread of the connecting section 21, which can improve the convenience of connecting the spark plug with the spark plug bushing 20. The axis of the main body section 22 can coincide with that of the connecting section 21.
[0022] In the above embodiment, the mounting hole can comprise a first mounting section and a second mounting section in communication with each other, the axis of the first mounting section coincides with that of the second mounting section, the main body section 22 is arranged in the first mounting section, and the connecting section 21 is arranged in the second mounting section. The connecting section 21 is in interference fit with the second mounting section to realize sealed connection between the connecting section 21 and the cylinder head body 10. Since the inner diameter of the main body section 22 is greater than that of the connecting section 21, the inner diameter of the first mounting section is also greater than that of the second mounting section.
[0023] In order to realize sealed connection between the main body section 22 and the first mounting section when the main body section 22 is arranged in the first mounting section, a sealing ring 40 can also be arranged between the main body section 22 and the first mounting section. It can also be understood that the sealing ring 40 is arranged between the inner wall of the mounting hole and the spark plug bushing 20. In some embodiments, the number of sealing rings 40 can be multiple, and the multiple sealing rings 40 are distributed in the extension direction of the spark plug bushing 20. The sealing ring 40 can be a rubber sealing ring 40.
[0024] In the above embodiment, the water jacket structure 30 can include an upper water jacket 31, a lower water jacket 32, and a connecting jacket, the upper water jacket 31 and the lower water jacket 32 are communicated with each other through the connecting jacket, and the connecting jacket and the lower water jacket 32 cover part of the connecting section 21 in the projection of the mounting hole axis. When the cooling liquid flows in the connecting jacket and the lower water jacket 32, the connecting jacket and the lower water jacket 32 can take away the heat of the connecting section 21 corresponding to the connecting jacket and the lower water jacket 32, so as to cool the connecting section 21, and reduce the temperature of the spark plug connected to the connecting section 21 and the cylinder head body 10.
[0025] In the above embodiment, the connecting jacket can be understood as the connecting part of the upper water jacket 31 and the lower water jacket 32, the size of the connecting jacket is smaller than the size of the lower water jacket 32, and the size of the connecting jacket is also smaller than the size of the upper water jacket 31, so that when the cooling liquid in the upper water jacket 31 flows into the lower water jacket 32 through the connecting jacket, the cooling liquid flowing speed of the connecting jacket part is faster, and the temperature drop speed of the connecting section 21 and the main body section 22 corresponding to the connecting jacket is faster.
[0026] In the above embodiment, the shape of the water jacket structure 30 can be plum blossom petal shape. In the above embodiment, the material of the spark plug bushing 20 is stainless steel.
[0027] In the above embodiment, the shape of the water jacket structure 30 can be plum blossom petal shape. In the above embodiment, the material of the spark plug bushing 20 is stainless steel.
[0028] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Therefore, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technology, the present application also intends to include these modifications and variations.
Claims
1. A cylinder head assembly characterized by, The cylinder head assembly comprises: a cylinder head body, a spark plug bushing and a water jacket structure; the cylinder head body is provided with a mounting hole, the mounting hole penetrates the water jacket structure, the spark plug bushing is arranged in the mounting hole, the spark plug bushing comprises a connecting section, the connecting section is used for connecting with a spark plug, wherein: in the projection of the mounting hole axis, the water jacket structure covers part of the connecting section.
2. The cylinder head assembly of claim 1, wherein, The spark plug bushing further comprises a main body section, the main body section and the connecting section are fixedly connected, and the inner diameter of the main body section is greater than the inner diameter of the connecting section.
3. The cylinder head assembly of claim 2, wherein, The mounting hole comprises a first mounting section and a second mounting section which are in communication with each other, the main body section is arranged in the first mounting section, the connecting section is arranged in the second mounting section, and the connecting section is in interference fit with the second mounting section.
4. The cylinder head assembly of claim 2, wherein, The connecting section is provided with an internal thread, and the internal thread is used for connecting with the spark plug.
5. The cylinder head assembly of claim 3, wherein, The water jacket structure comprises an upper water jacket, a lower water jacket and a connecting sleeve, the upper water jacket and the lower water jacket are in communication with each other through the connecting sleeve, in the projection of the mounting hole axis, the connecting sleeve and the lower water jacket cover part of the connecting section.
6. The cylinder head assembly of claim 5, wherein, The size of the connecting sleeve is smaller than the size of the lower water jacket and the upper water jacket.
7. The cylinder head assembly of claim 1, wherein, The cylinder head assembly further comprises a sealing ring, the sealing ring is arranged between the inner wall of the mounting hole and the spark plug bushing.
8. The cylinder head assembly of claim 1, wherein The material of the spark plug bushing is stainless steel.
9. The cylinder head assembly of claim 2, wherein, The axis of the main body section coincides with the axis of the connecting section.
10. A hydrogen engine characterized by The cylinder head assembly comprises any one of claims 1-9.