Cylinder cover assembly, engine and vehicle
By designing mounting holes and oil return channels in the cylinder head assembly, oil channels and oil return holes are set up in the injector body. Combined with the bushing and sealing ring structure, the carbon deposit problem caused by the high temperature of the injector nozzle is solved, and the engine power is improved and emissions are optimized.
Patent Information
- Application Number
- CN202422966298.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The nozzle of the diesel-gas dual-fuel engine injector has a large diameter, resulting in a large heating area in the combustion cylinder and high temperature, which easily forms carbon deposits, causing the engine power to decrease and emissions to worsen.
Mounting holes and oil return channels are designed in the cylinder head assembly. Oil channels and oil return holes are provided in the injector body. The oil return holes are connected to the oil channels and mounting holes. During the return process, the fuel takes away the heat near the nozzle. Combined with the bushing and sealing ring structure, carbon deposits are prevented in the nozzle.
Effectively reduce the injector nozzle temperature, prevent carbon deposits, ensure the normal operation of the engine, improve power and avoid emission deterioration.
Smart Images
Figure CN223359253U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, in particular to a cylinder head assembly, an engine and a vehicle. Background Art
[0002] Vehicles play a crucial role in transportation and logistics. The engine is the vehicle's power source. During engine operation, injectors are required to spray fuel into the combustion cylinders. The injector nozzles of diesel-gas dual-fuel engines utilize a nested structure. Due to the large diameter of the injector nozzles, the nozzles are exposed to a large heating area within the combustion cylinder, resulting in high nozzle temperatures and the formation of carbon deposits, which can lead to reduced engine performance and worsening emissions.
[0003] Therefore, a cylinder head assembly, an engine and a vehicle are needed to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a cylinder head assembly, an engine and a vehicle, which can reduce the temperature of the oil nozzle of the injector body and prevent carbon deposition in the oil nozzle, thereby improving the engine power and avoiding deterioration of emissions.
[0005] To achieve this purpose, the present invention adopts the following technical solutions:
[0006] Cylinder head assembly, including:
[0007] A cylinder head, wherein the cylinder head has a mounting hole and an oil return passage communicating with the mounting hole is formed on the cylinder head;
[0008] The injector body is inserted into the mounting hole. An oil passage and an oil return hole are provided in the injector body. The oil return hole is located at one end of the injector body having an oil nozzle, and the oil return hole is communicated with the oil passage and the mounting hole.
[0009] In some embodiments, a bushing is further included, which is arranged in the mounting hole, the injector body is inserted into the bushing, a cooling water channel is opened in the cylinder head, and part of the structure of the bushing is located in the cooling water channel.
[0010] In some embodiments, a first sealing ring is sleeved on the bushing, and the first sealing ring is used to seal the gap between the bushing and the hole wall of the mounting hole.
[0011] In some embodiments, a mounting ring groove is provided on the mounting hole wall of the cylinder head, the first sealing ring is embedded in the mounting ring groove, and the inner circumferential surface of the first sealing ring protrudes relative to the mounting ring groove.
[0012] In some embodiments, the oil return hole is located on a side of the injector body facing the exhaust valve.
[0013] In some embodiments, a plurality of the oil return holes are provided at intervals along the circumference of the injector body.
[0014] In some embodiments, the oil return hole facing the exhaust valve has a larger diameter than the other oil return holes.
[0015] In some embodiments, a second sealing ring is sleeved on the injector body. The second sealing ring is located at an end of the injector body away from the oil nozzle and is used to seal the gap between the injector body and the hole wall of the mounting hole.
[0016] An engine comprises a cylinder block and the cylinder head assembly as described above, wherein the cylinder head of the cylinder head assembly is arranged on the cylinder block.
[0017] A vehicle comprises a vehicle body and the engine as described above, wherein the engine is arranged on the vehicle body.
[0018] Beneficial effects of the utility model:
[0019] The utility model provides a cylinder head assembly, in which a mounting hole and an oil return channel connected to the mounting hole are provided on the cylinder head, and an injector body is inserted into the mounting hole. An oil channel and an oil return hole are provided in the injector body, and the oil return hole is located at the end of the injector body having the oil nozzle, and the oil return hole is connected to the oil channel and the mounting hole. Since the oil return hole is located at the end of the injector body having the oil nozzle, the heat near the oil nozzle of the injector body can be taken away during the fuel return process, thereby reducing the temperature of the oil nozzle and preventing carbon deposits on the oil nozzle. In addition, the injector body can effectively spray fuel, thereby ensuring that the engine can operate normally and the fuel can be fully burned, thereby improving the engine power and avoiding emission deterioration.
[0020] The utility model provides an engine comprising a cylinder block and the cylinder head assembly as described above, which can reduce the temperature of the oil nozzle of the injector body and prevent carbon deposition in the oil nozzle, thereby improving the engine power and avoiding deterioration of emissions.
[0021] The utility model provides a vehicle comprising a vehicle body and the engine as described above, which can reduce the temperature of the oil nozzle of the injector body and prevent carbon deposition on the oil nozzle, thereby improving the engine power and avoiding deterioration of emissions. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.
[0023] Figure 1 This is a schematic diagram of a cylinder head assembly of the utility model;
[0024] Figure 2 It is a cross-sectional view of an injector body in a cylinder head assembly of the utility model.
[0025] In the picture:
[0026] 1. Cylinder head; 11. Oil return channel; 12. Cooling water channel; 2. Bushing; 21. First sealing ring; 3. Injector body; 31. Oil channel; 32. Oil return hole; 33. Second sealing ring. DETAILED DESCRIPTION
[0027] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.
[0028] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.
[0029] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.
[0030] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.
[0031] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.
[0032] During the operation of the engine, due to the large diameter of the injector nozzle, the injector nozzle has a large heating area in the combustion cylinder, resulting in a high temperature of the injector nozzle, which is prone to carbon deposits, resulting in a decrease in engine power and worsening emissions.
[0033] In order to solve the above problems, Figure 1-Figure 2 As shown, the present invention provides a cylinder head assembly. The cylinder head assembly includes a cylinder head 1 and an injector body 3.
[0034] The cylinder head 1 has a mounting hole and an oil return passage 11 connected to the mounting hole. The injector body 3 is inserted into the mounting hole and has an oil passage 31 and an oil return hole 32 formed therein. The oil return hole 32 is located at the end of the injector body 3 with the oil nozzle and is connected to the oil passage 31 and the mounting hole. Fuel can flow through the oil passage 31, the oil return hole 32, and the gap between the injector body 3 and the mounting hole, and finally enter the oil return passage 11.
[0035] During engine operation, some fuel can flow down oil passage 31 to oil return hole 32. Because oil return hole 32 is located at the end of injector body 3 with the nozzle, the fuel's return flow removes heat from the nozzle area of injector body 3, lowering the nozzle's temperature and preventing carbon deposits. Furthermore, injector body 3 can effectively inject fuel, ensuring proper engine operation and sufficient fuel combustion, boosting engine power while minimizing emissions.
[0036] like Figure 2As shown, in some embodiments, an oil passage 31 is defined within the housing of the injector body 3 along its extension direction, and an oil return hole 32 is defined in the housing of the injector body 3, communicating with the lower end of the oil passage 31. A portion of the fuel flows directly through the oil passage 31 and out of the oil return hole 32, ultimately entering the fuel tank through the oil return passage 11. This portion of the fuel only serves to absorb heat from the nozzle and does not participate in combustion.
[0037] In some embodiments, the cylinder head assembly further includes a bushing 2, which is disposed in a mounting hole, and the injector body 3 is passed through the bushing 2. A cooling water channel 12 is provided in the cylinder head 1, and part of the structure of the bushing 2 is located in the cooling water channel 12. Specifically, the bushing 2 is passed through the mounting hole of the cylinder head 1, and the bushing 2 serves to isolate the cooling water channel 12 from the mounting hole, thereby preventing the cooling water from mixing with the fuel. Moreover, when the fuel that has subsequently absorbed heat flows through the gap between the bushing 2 and the injector body 3, since part of the structure of the bushing 2 is located in the cooling water channel 12, the heat in the fuel can be heat-exchanged with the cooling water in the cooling water channel 12 through the bushing 2, thereby reducing the temperature of the returning fuel, thereby achieving heat exchange between the heat of the injector body 3 and the returning fuel, which can further reduce the temperature of the injector body 3.
[0038] In some embodiments, a first sealing ring 21 is sleeved on the bushing 2. The first sealing ring 21 is used to seal the gap between the bushing 2 and the wall of the mounting hole. By providing the first sealing ring 21, the first sealing ring 21 is sandwiched between the bushing 2 and the wall of the mounting hole, and the first sealing ring 21 undergoes elastic deformation, thereby effectively sealing the gap between the bushing 2 and the wall of the mounting hole. This prevents the cooling water in the cooling water flow channel 12 from passing through the gap between the bushing 2 and the wall of the mounting hole and entering the gap between the injector body 3 and the mounting hole. This prevents the cooling water from mixing with the returning fuel, thereby ensuring the cleanliness of the fuel returning to the fuel tank through the oil return flow channel 11.
[0039] In some embodiments, a mounting ring groove is defined in the wall of the mounting hole of the cylinder head 1. The first sealing ring 21 is embedded in the mounting ring groove, with the inner circumference of the first sealing ring 21 protruding relative to the mounting ring groove. The provision of the mounting ring groove facilitates positioning and installation of the first sealing ring 21. Furthermore, after the bushing 2 is installed, the first sealing ring 21 is squeezed and deformed, thereby effectively sealing the gap between the mounting hole and the bushing 2, providing a good sealing effect.
[0040] In some embodiments, the oil return hole 32 is located on the side of the injector body 3 facing the exhaust valve. Since the temperature of the injector body 3 facing the exhaust valve is higher during engine operation, arranging the oil return hole 32 on the side of the injector body 3 facing the exhaust valve can effectively cool the higher temperature portion of the injector nozzle of the injector body 3, thereby effectively preventing carbon deposits.
[0041] In some embodiments, a plurality of oil return holes 32 are provided at intervals along the circumference of the injector body 3. By providing a plurality of oil return holes 32, the return fuel can be used to cool the nozzle of the injector body 3 in multiple directions, thereby ensuring effective cooling of the nozzle of the injector body 3. The return fuel can effectively remove heat from the nozzle of the injector body 3, thereby preventing carbon deposits on the nozzle.
[0042] In some embodiments, the diameter of the oil return hole 32 facing the exhaust valve is larger than the diameters of the remaining oil return holes 32. Because the temperature of the injector body 3 facing the exhaust valve is higher during engine operation, the larger diameter of the oil return hole 32 facing the exhaust valve ensures a higher fuel flow rate during fuel return, thereby removing more heat in the same amount of time, effectively cooling the higher-temperature portion of the injector nozzle of the injector body 3. Furthermore, by arranging the remaining oil return holes 32 with smaller diameters, the nozzle of the injector body 3 can also be cooled in other locations, effectively preventing carbon deposits.
[0043] In some embodiments, the injector body 3 is fitted with a second sealing ring 33. This second sealing ring 33 is located at the end of the injector body 3 away from the nozzle and serves to seal the gap between the injector body 3 and the wall of the mounting hole. The provision of this second sealing ring 33 prevents outside air from entering the gap between the injector body 3 and the mounting hole, thereby preventing the emulsification of the refluxed fuel. Furthermore, the second sealing ring 33 prevents refluxed fuel from escaping through the gap between the injector body 3 and the mounting hole, ensuring that refluxed fuel flows solely back into the fuel tank through the oil return passage 11.
[0044] In some embodiments, the return oil channel 11 can also be designed to be in a bow shape, thereby extending the length of the return oil channel 11. When the high-temperature fuel flows through the return oil channel 11 and enters the fuel tank, it can fully utilize the cylinder head 1 and the outside world and the cooling water in the cooling water channel 12 for heat exchange, so that the temperature of the high-temperature return fuel is quickly reduced, and after returning to the fuel tank, the oil temperature in the fuel tank is prevented from rising.
[0045] This embodiment also provides an engine, including a cylinder block and a cylinder head assembly as described above. The cylinder head 1 of the cylinder head assembly is arranged on the cylinder block, which can reduce the temperature of the oil nozzle of the injector body 3 and prevent carbon deposition on the oil nozzle, thereby improving the engine power and avoiding deterioration of emissions.
[0046] This embodiment also provides a vehicle, including a vehicle body and the above engine, which is arranged on the vehicle body and can reduce the temperature of the oil nozzle of the engine's injector body 3, prevent carbon deposition in the oil nozzle, thereby improving the engine power and avoiding deterioration of emissions.
[0047] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. Cylinder head assembly, characterized in that: include: A cylinder head (1), wherein the cylinder head (1) has a mounting hole, and an oil return passage (11) communicating with the mounting hole is provided on the cylinder head (1); An injector body (3) is inserted into the mounting hole. An oil passage (31) and an oil return hole (32) are provided in the injector body (3). The oil return hole (32) is located at one end of the injector body (3) having an oil nozzle, and the oil return hole (32) is communicated with the oil passage (31) and the mounting hole.
2. The cylinder head assembly according to claim 1, characterized in that: It also includes a bushing (2), which is arranged in the mounting hole, and the injector body (3) is inserted into the bushing (2). A cooling water flow channel (12) is opened in the cylinder head (1), and part of the structure of the bushing (2) is located in the cooling water flow channel (12).
3. The cylinder head assembly according to claim 2, characterized in that: A first sealing ring (21) is sleeved on the bushing (2), and the first sealing ring (21) is used to seal the gap between the bushing (2) and the hole wall of the mounting hole.
4. The cylinder head assembly according to claim 3, characterized in that: A mounting ring groove is provided on the mounting hole wall of the cylinder cover (1), the first sealing ring (21) is embedded in the mounting ring groove, and the inner peripheral surface of the first sealing ring (21) protrudes relative to the mounting ring groove.
5. The cylinder head assembly according to any one of claims 1 to 4, characterized in that: The oil return hole (32) is located on a side of the injector body (3) facing the exhaust valve.
6. The cylinder head assembly according to any one of claims 1 to 4, characterized in that: A plurality of oil return holes (32) are provided at intervals along the circumference of the injector body (3).
7. The cylinder head assembly according to claim 6, characterized in that: The diameter of the oil return hole (32) facing the exhaust valve side is larger than the diameters of the other oil return holes (32).
8. The cylinder head assembly according to claim 1, characterized in that: A second sealing ring (33) is sleeved on the injector body (3). The second sealing ring (33) is located at an end of the injector body (3) away from the oil nozzle and is used to seal the gap between the injector body (3) and the wall of the mounting hole.
9. An engine, characterized in that The invention comprises a cylinder body and a cylinder head assembly according to any one of claims 1 to 8, wherein the cylinder head (1) of the cylinder head assembly is arranged on the cylinder body.
10. A vehicle, characterized in that The vehicle comprises a vehicle body and the engine according to claim 9, wherein the engine is arranged on the vehicle body.