Cylinder head assembly and engine

Abstract

This application relates to a cylinder head assembly and an engine. The cylinder head assembly includes: a pre-combustion component, which includes a positioning portion and a pre-combustion chamber body connected to each other; a cylinder head, which has a first mounting hole, wherein the diameter of the outer peripheral wall of the positioning portion is larger than the diameter of the first mounting hole, and the diameter of the outer peripheral wall of the pre-combustion chamber body is smaller than the diameter of the first mounting hole; and a mounting assembly, which includes a plurality of first guide members, which are circumferentially spaced along the first mounting hole. Each first guide member has one end connected to the cylinder head and the other end passing through the positioning portion along a first direction, allowing the pre-combustion chamber body to move along the first guide member into the first mounting hole. The first direction is parallel to the central axis of the first mounting hole. The pre-combustion component is positioned by the first guide members, reducing the positioning difficulty, and the movement of the pre-combustion component along the first guide members ensures that the pre-combustion component and the cylinder head maintain an initial positioning state, improving the installation accuracy of the pre-combustion component.

Description

Technical Field

[0001] This application relates to the field of engine technology, and in particular to cylinder head assemblies and engines. Background Technology

[0002] Traditional engines mostly employ a single combustion chamber structure, a sealed space consisting of the cylinder head bottom, cylinder liner, cylinder head gasket, and piston top. A spark plug ignites the combustible mixture within the combustion chamber to produce power. This combustion method has limited ignition energy and slow flame propagation speed, thus limiting further improvements in thermal efficiency. To increase the combustion speed of the combustion gases, a pre-combustion chamber is added to the existing main combustion chamber. The gases ignite and burn within the pre-combustion chamber, and the flame propagates through nozzles at the bottom of the pre-combustion chamber to the main combustion chamber, thereby improving thermal efficiency.

[0003] In related technologies, the pre-combustion chamber structure is often installed onto the cylinder head via a threaded connection. However, because the pre-combustion chamber needs to be aligned with the fuel injector to achieve ignition, the threaded connection makes it difficult to determine the starting position of the thread, resulting in positioning difficulties and inaccurate positioning during installation. Summary of the Invention

[0004] Therefore, it is necessary to provide a cylinder head assembly and engine to address the problem of inaccurate installation and positioning of the pre-combustion chamber.

[0005] The first aspect of this application provides a cylinder head assembly, comprising: a pre-combustion element, the pre-combustion element including a positioning part and a pre-combustion chamber body connected to each other; a cylinder head, the cylinder head having a first mounting hole, the diameter of the outer peripheral wall of the positioning part being larger than the diameter of the first mounting hole, and the diameter of the outer peripheral wall of the pre-combustion chamber body being smaller than the diameter of the first mounting hole; and a mounting assembly, the mounting assembly including a plurality of first guide members, the plurality of first guide members being circumferentially spaced along the first mounting hole, each first guide member having one end connected to the cylinder head and the other end passing through the positioning part along a first direction, such that the pre-combustion chamber body can move along the first guide member into the first mounting hole, the first direction being parallel to the central axis of the first mounting hole.

[0006] In one embodiment, the mounting assembly includes a second guide and an operating member. The second guide is connected to the end of the first guide away from the cylinder head, and the operating member passes through the guide and is connected to the pre-combustion member. The operating member is movable relative to the second guide and drives the pre-combustion member to move along the first guide.

[0007] In one embodiment, the installation assembly further includes a connector disposed between the second guide and the pre-ignition member, the connector being connected to the pre-ignition member, and the operating member passing through the guide and being connected to the connector.

[0008] In one embodiment, the connector is provided with a mating cavity, which is open along a first direction, and one end of the operating member can be accommodated in the mating cavity.

[0009] In one embodiment, the mounting assembly further includes a fixing member, and the connector is provided with a fixing hole that communicates with the mating cavity and is arranged circumferentially along the mating cavity. The fixing member is configured to pass through the fixing hole and connect to the operating member, so that the operating member is fixed in the mating cavity.

[0010] In one embodiment, the pre-combustion chamber body includes a first mating part and a second mating part. The positioning part is connected to the end of the first mating part near the second guide member, and the second mating part is connected to the end of the first mating part away from the second guide member. The diameter of the outer peripheral wall of the second mating part is smaller than the diameter of the outer peripheral wall of the first mating part. A stepped surface is provided in the first mounting hole, and the first mating part can abut against the stepped surface.

[0011] In one embodiment, the pre-combustion chamber body further includes a third mating part, which is connected to the end of the second mating part away from the first guide member. The diameter of the outer peripheral wall of the third mating part is smaller than the diameter of the outer peripheral wall of the second mating part, and the third mating part transitionally engages with the end of the first mounting hole away from the first guide member.

[0012] In one embodiment, the cylinder head assembly further includes a sealing assembly, which includes at least a first seal and a second seal. The first seal is disposed between the positioning portion and the cylinder head, and the second seal is disposed between the first mating portion and the stepped surface.

[0013] In one embodiment, the cylinder head assembly further includes a fuel injector, and the cylinder head is also provided with a second mounting hole, the central axis of the second mounting hole being inclined relative to the central axis of the first mounting hole and communicating with the first mounting hole, the fuel injector being disposed in the second mounting hole and capable of abutting against the pre-combustion element.

[0014] This application also provides an engine, including the cylinder head assembly as described above.

[0015] The aforementioned cylinder head assembly uses multiple first guide members, one end of which is connected to the cylinder head and the other end of which passes through the positioning part of the pre-combustion component, to achieve positioning between the pre-combustion component and the cylinder head. Furthermore, the pre-combustion component can enter the first mounting hole along the first guide member. The first guide member provides guidance for the movement of the pre-combustion component, enabling the pre-combustion component to move while maintaining alignment with the fuel injector, avoiding inaccurate positioning of the pre-combustion component due to rotation, and improving the alignment and installation accuracy of the pre-combustion component. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a cylinder head assembly according to an embodiment of this application.

[0017] Figure 2 This is a schematic diagram of a cylinder head assembly according to one embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the cylinder head assembly during installation according to one embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the pre-ignition element in one embodiment of this application. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0026] See Figures 1 to 3 , Figures 1 to 3 A schematic diagram of a cylinder head assembly according to an embodiment of this application is shown. The cylinder head assembly 100 provided in one embodiment of this application includes a pre-combustion element 20, a cylinder head 10, and a mounting assembly 30.

[0027] Combination Figure 4 The pre-combustion component 20 includes a positioning part 21 and a pre-combustion chamber body. The positioning part 21 can abut against the cylinder head 10, and the pre-combustion chamber body can extend into the cylinder head 10 and connect to the combustion chamber of the cylinder to achieve ignition of the cylinder. The pre-combustion component 20 is provided with a pre-combustion chamber 25. One end of the pre-combustion chamber 25 is open, so that the spark plug 40 can be installed into the pre-combustion chamber 25. The other end is provided with a nozzle 241, which connects the pre-combustion chamber 25 and the cylinder. Preferably, a plurality of nozzles 241 are arranged at intervals along the circumference of the pre-combustion chamber 25.

[0028] The cylinder head 10 is used for the installation of the pre-combustion component 20. The cylinder head 10 is provided with a first mounting hole 11. By accommodating the main body of the pre-combustion chamber in the first mounting hole 11, the injection hole 241 can be connected to the inside of the cylinder, thereby realizing the combustion process of the cylinder.

[0029] During the engine's compression stroke, a portion of the air-fuel mixture in the cylinder is forced into the pre-combustion chamber 25 through the nozzle 241. After the spark plug 40 ignites, the air-fuel mixture in the pre-combustion chamber 25 is ignited. This portion of the air-fuel mixture first burns and expands in the pre-combustion chamber 25, forming a flame nucleus. The flame then rapidly spreads outwards and expands rapidly into the cylinder through the flame nozzle 241 designed at the bottom of the pre-combustion chamber 25, forming multiple ignition points in the cylinder. This achieves a rapid combustion process, increases the combustion speed, and shortens the combustion time, which can effectively improve the combustion state of the air-fuel mixture, further increase the air-fuel ratio, and improve fuel consumption and emissions.

[0030] Mounting assembly 30 is used to mount and fix pre-combustion chamber 20 to cylinder head 10. Mounting assembly 30 includes guide unit 31. Guide unit 31 is used to provide positioning and guidance for pre-combustion chamber 20. Specifically, guide unit 31 includes first guide member 311. The positioning part 21 of pre-combustion chamber 20 is provided with a first positioning hole 211, which is arranged circumferentially around opening 251. The cylinder head 10 is provided with a second positioning hole 13, which is arranged circumferentially along the first mounting hole 11. One end of the first guide member 311 is connected to cylinder head 10 through the second positioning hole 13, and the other end passes through the first positioning hole 211 of positioning part 21 along a first direction parallel to the central axis of the first mounting hole 11, so that the pre-combustion chamber body can move along the first guide member 311 into the first mounting hole 11. The first guide member 311 defines the movement path of pre-combustion chamber 20, making assembly feasible and efficient.

[0031] Furthermore, multiple first guide members 311 are configured, and the multiple first guide members 311 are arranged at intervals along the circumference of the first mounting hole 211. For example, two first guide members 311 are arranged opposite each other on both sides of the first mounting hole 211, or three first guide members 311 are arranged in a triangular shape around the first mounting hole 211, or four first guide members 311 are arranged in a square shape around the first mounting hole, etc., so as to achieve the fixation of the pre-combustion component 20 at various positions, so that the pre-combustion component 20 can be evenly and stably installed on the cylinder head 10.

[0032] By using multiple first guide members 311, one end of which is connected to the cylinder head 10 and the other end of which passes through the positioning part 21 of the pre-combustion component 20, the positioning between the pre-combustion component 20 and the cylinder head 10 is achieved. Furthermore, the pre-combustion component 20 can enter the first mounting hole 11 along the first guide member 311. The first guide member 311 provides guidance for the movement of the pre-combustion component 20, so that the pre-combustion component 20 can move while maintaining alignment with the injector 60, avoiding inaccurate positioning of the pre-combustion component 20 due to rotation, and improving the alignment accuracy and installation accuracy of the pre-combustion component 20.

[0033] In some embodiments, the mounting assembly further includes an operating member 32, and the guiding unit 31 further includes a second guide member 312. The operating member 32 is operated by the user to move the pre-ignition member 20 along the first guide member 311. Specifically, the second guide member 312 is provided with a guide hole 3121, the central axis of which coincides with the central axis of the first mounting hole 11. The operating member 32 is configured to pass through the guide hole 3121 and connect to the pre-ignition member 20. The operating member 32 can move relative to the second guide member 312, thereby driving the pre-ignition member 20 to move along the first guide member 311 into the first mounting hole 11. The guide hole 3121 restricts the movement path of the operating member 32, thereby enabling the operating member 32 to accurately and stably drive the pre-ignition member 20 into the first mounting hole 11, avoiding the pre-ignition member 20 from tilting due to uneven force during movement, thus improving the installation efficiency and accuracy of the pre-ignition member 20. In this embodiment, the first guide member 311 is threadedly connected to the second positioning hole 13 and the second guide member 312.

[0034] In some embodiments, see Figure 1 The cylinder head assembly 100 also includes a water jacket 50. Coolant can circulate in the water jacket 50, thereby transferring heat energy from the engine combustion chamber and cylinder wall to the coolant through heat conduction. The water jacket 50 effectively reduces engine temperature, maintains a balanced temperature across different engine components, and improves engine thermal efficiency and reliability.

[0035] In some embodiments, see Figure 1 and Figure 3 The cylinder head assembly 100 also includes an injector 60. The cylinder head 10 is provided with a second mounting hole 12. The axis of the second mounting hole 12 is inclined relative to the axis of the first mounting hole 11 and communicates with the first mounting hole 11. The injector 60 is disposed in the second mounting hole 12 and abuts against the pre-combustion component 20.

[0036] The second mounting hole 12 is designed to prevent the injector 60 from contacting the coolant inside the cylinder head 10, thereby preventing the coolant from mixing with the fuel and affecting combustion efficiency. Furthermore, in conjunction with... Figure 1 and Figure 4The injector 60 has an injection hole (not shown) at its end. The pre-combustion component 20 has a connection hole 231. The injection hole is oriented toward the connection hole 231 so that fuel enters the pre-combustion chamber 25 through the injection hole.

[0037] The injector 60 is configured to improve the combustion process, increase combustion efficiency, and control combustion characteristics. By injecting fuel into the pre-combustion chamber 25 through the injector 60, the fuel is atomized into fine combustion particles, allowing for better mixing with air. This helps promote complete combustion, improves combustion efficiency, and reduces exhaust emissions and fuel consumption. The injector 60 can also adjust the fuel-air mixture ratio within the pre-combustion chamber 25, altering the stability and rate of combustion.

[0038] The arrangement of multiple first guide members 311 ensures that the orientation of the connecting hole 231 is fixed during the installation of the pre-ignition component 20, always facing the fuel injection hole, thus guaranteeing that the connecting hole 231 of the pre-ignition component 20 is aligned with the fuel injection hole after installation, achieving accurate positioning of the pre-ignition component 20.

[0039] In some embodiments, see Figures 1 to 3 The installation component 30 also includes a connector 33, which is disposed between the second guide 312 and the pre-ignition component 20. The connector 33 is connected to the pre-ignition component 20 and can close the opening 251. The operating component 32 passes through the guide hole 3121 and abuts against the connector 33.

[0040] The connector 33 facilitates the connection between the pre-ignition component 20 and the operating component 32. Furthermore, the connector 33 allows the operating component 32 to be used on pre-ignition components 20 of different sizes, improving the versatility of the installation assembly 30. In addition, the connector 33 helps to prevent the operating component 32 from damaging the pre-ignition component 20, thus helping to ensure the long-term use of the pre-ignition component 20.

[0041] Furthermore, the connecting member 33 includes a connecting portion 331 and a receiving portion 332 connected to the connecting portion 331. The receiving portion 332 is received in the pre-combustion chamber 25. The connecting portion 331 can close the opening 251 of the pre-combustion member 20. The connecting portion 331 is provided with a connecting cavity 333, which is open along a first direction. One end of the operating member 32 can be received in the connecting cavity 333. Preferably, the central axes of the connecting cavity 333 and the guide hole 3121 coincide with each other, thereby realizing the accurate installation of the pre-combustion member 20 into the first mounting hole 11.

[0042] Specifically, the connecting part 331 is disposed between the pre-combustion component 20 and the second guide component 312, the receiving part 332 is threadedly connected to the pre-combustion chamber 25, and the operating part 32 abuts against the bottom of the connecting cavity 333, so that the operating part 32 can drive the connecting part 331 and the pre-combustion component 20 to move together relative to the first guide component 311 into the first mounting hole 11, thereby realizing the fixed connection between the pre-combustion component 20 and the cylinder head 10.

[0043] In some embodiments, the mounting assembly 30 further includes a fixing member 34, and the connecting portion 331 is also provided with a fixing hole 334. The fixing hole 334 communicates with the mating cavity 333 and is arranged along the circumference of the operating member 32. The fixing member 34 is configured to pass through the fixing hole 334 and abut against the operating member 32, so that the operating member 32 is fixed in the mating cavity 333. Optionally, the fixing member 34 is a fastener, and the fixing member 34 is threadedly connected to the fixing hole 334.

[0044] See in this application. Figures 1 to 3 The operating member 32 is provided with an operating part 321, a first abutment part 322, a connecting part 323, a fixing part 324, and a second abutment part 325 sequentially along its axial direction. The operating part 321 is used by the operator to operate the operating member 32 to drive the pre-combustion member 20 to move. The diameter of the outer peripheral wall of the first abutment part 322 is larger than the diameter of the outer peripheral walls of the connecting part 323 and the second abutment part 325, so that when the second abutment part 325 abuts against the bottom of the connecting cavity 333, the first abutment part 322 can abut against the end face of the connecting part 331 away from the pre-combustion member 20, thereby facilitating the connection between the operating member 32 and the connecting part 331. The connecting part 323, the fixing part 324, and the second abutting part 325 can be accommodated in the connecting cavity 333. The diameter of the outer peripheral wall of the fixing part 324 is smaller than the diameter of the outer peripheral wall of the connecting part 323 and the second abutting part 325. The axial dimension of the fixing part 324 matches the radial dimension of the fixing member 34. Thus, by the fixing member 34 abutting against the fixing part 324, the operating member 32 can be fixed in the connecting cavity 333, improving the stability of the operating member 32 when it moves.

[0045] Alternatively, the operating member 32 is threadedly connected to the second guide member 312. By rotating the operating member 32, the operating member 32 will move relative to the second guide member 312 through the engaged thread, thereby pushing the pre-burner 20 and the connecting member 33 to move along the first guide member 311 until the pre-burner 20 contacts the cylinder wall.

[0046] Preferably, the mounting component 30 is detachably connected to the cylinder head 10 and the pre-combustion component 20, thereby facilitating the installation and removal of the pre-combustion component 20. Based on the operating component 32 and the connecting component 33, damage to the pre-combustion component 20 can be avoided, thereby improving the assembly quality and efficiency of the pre-combustion component 20 and the cylinder head 10.

[0047] Combination Figure 4 As shown, Figure 4 A schematic diagram of a pre-combustion member 20 according to an embodiment of this application is shown. In some embodiments, the pre-combustion member 20 has a positioning part 21 and a pre-combustion chamber body in its axial direction. The pre-combustion chamber body includes a first mating part 22. The positioning part 21 is connected to one end of the first mating part 22 near the second guide member 312. The first mating part 22 is accommodated in a first mounting hole 11. The diameter of the outer peripheral wall of the positioning part 21 is larger than the diameter of the first mounting hole 11, and the diameter of the outer peripheral wall of the first mating part 22 is smaller than the diameter of the first mounting hole 11. A second positioning hole 13 is disposed on the positioning part 21.

[0048] The positioning part 21 facilitates the determination of whether the pre-combustion component 20 is fully inserted into the first mounting hole 11. When the positioning part 21 moves to abut against the cylinder head 10, the pre-combustion component 20 is installed with the cylinder head 10, preventing further movement of the pre-combustion component 20. Furthermore, the positioning part 21 facilitates the installation of the second positioning hole 13, allowing the first guide member 311 to pass through the pre-combustion component 20, thereby enabling the pre-combustion component 20 to move along the first guide member 311, achieving positioning and installation of the pre-combustion component 20, and simplifying the positioning process of the pre-combustion component 20.

[0049] Feasibly, the first mating part 22 and the first mounting hole 11 are interference fits, which can realize the connection between the pre-combustion component 20 and the cylinder head 10, and at the same time realize the seal between the pre-combustion component 20 and the cylinder head 10 to prevent air leakage.

[0050] Furthermore, the main body of the pre-combustion chamber also has a second mating part 23 in its axial direction. The second mating part 23 is connected to the end of the first mating part 22 away from the second guide member 312. The diameter of the outer peripheral wall of the second mating part 23 is smaller than the diameter of the outer peripheral wall of the first mating part 22. A stepped surface is provided in the first mounting hole 11, and the first mating part 22 abuts against the stepped surface.

[0051] The arrangement of the first mating part 22 and the second mating part 23 results in a stepped surface being formed inside the pre-combustion chamber 25. At least part of the spark plug 40 abuts against this stepped surface, thereby positioning the spark plug 40 and ensuring that the spark plug 40 can always ignite the gas inside the pre-combustion chamber 25.

[0052] Specifically, in this embodiment, the pre-combustion chamber body also has a third mating part 24 in its axial direction. The third mating part 24 is connected to the end of the second mating part 23 away from the second guide member 312. The diameter of the outer peripheral wall of the third mating part 24 is smaller than the diameter of the outer peripheral wall of the second mating part 23. The third mating part 24 transitionally fits with the end of the first mounting hole 11 away from the first guide member 311. The spray hole 241 is disposed on the third mating part 24. Preferably, the positioning part 21, the first mating part 22, the second mating part 23, and the third mating part 24 are integrally formed to improve the strength and reliability of the pre-combustion component 20 itself.

[0053] The transition fit can accommodate the thermal expansion and contraction of the third mating part 24, increasing the reliability of the connection between the pre-combustion chamber 25 and the cylinder head 10, while improving the sealing between the pre-combustion chamber 25 and the first mounting hole 11, so that the combustion gas cannot enter the first mounting hole 11, and the coolant cooling the cylinder head 10 will not leak into the cylinder.

[0054] Optionally, the transition fit tolerance zone between the third mating part 24 and the first mounting hole 11 is H7 / K6. Alternatively, before installation, the third mating part 24 can be immersed in liquid nitrogen for at least 30 minutes to shrink it, facilitating its installation into the first mounting hole 11.

[0055] In some embodiments, see Figure 1 , Figure 3 and Figure 4 The cylinder head assembly 100 also includes a sealing assembly 70, which includes at least a first seal 71 and a second seal 72. The first seal 71 is disposed between the positioning portion 21 and the cylinder head 10, and the second seal 72 is disposed between the first mating portion 22 and the stepped surface. Optionally, during installation, when the first seal 71 contacts the cylinder head 10, the operating member 32 is rotated further, causing the first seal 71 to press against the cylinder head 10. When the rotational force is between 60 Nm and 80 Nm, the pre-combustion element 20 and the cylinder head 10 can be considered to have essentially achieved a sealing state.

[0056] The first seal 71 reduces damage to the pre-combustion component 20 during installation, compensates for errors during manufacturing and assembly, and seals the lubricating oil in the first mounting hole 11 used to lubricate the pre-combustion component 20. Optionally, the first seal 71 is a rubber gasket. The second seal 72 isolates the fuel gas and coolant; optionally, the second seal 72 is a metal gasket.

[0057] Specifically, in this embodiment, the sealing assembly 70 further includes a third seal 73. A sealing groove 221 is provided on the first mating portion 22 of the pre-ignition component 20, and the third seal 73 is disposed in the sealing groove 221. The third seal 73 is used to isolate the coolant and engine oil, thereby ensuring the lubrication effect of the engine oil on the pre-ignition component 20 and the cooling effect of the coolant on the pre-ignition component 20. Optionally, the third seal 73 is an O-ring rubber seal.

[0058] During installation, the first guide member 311 is passed through the first positioning hole 211 and one end is connected to the second positioning hole 13. The connecting member 33 is connected to the pre-ignition member 20 until the end face of the pre-ignition member 20 is in contact with the end face of the connecting member 33. Then, the second guide member 312 is connected to the other end of the first guide member 311. After that, the guide member is passed through the guide hole 3121 and abuts against the connecting member 33. The fixing member 34 is passed through the fixing hole 334 to fix the guide member. Finally, the operating member 32 is driven so that the pre-ignition member 20 moves along the first guide member 311 into the first mounting hole 11.

[0059] As part of the same concept, this application also provides an engine including a cylinder head assembly 100, which is the cylinder head assembly 100 in the above embodiments.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cylinder head assembly characterized by, The cylinder head assembly includes: A pre-combustion component, comprising a positioning part and a pre-combustion chamber body connected to each other; A cylinder head, wherein the cylinder head has a first mounting hole, the diameter of the outer peripheral wall of the positioning part is larger than the diameter of the first mounting hole, and the diameter of the outer peripheral wall of the pre-combustion chamber body is smaller than the diameter of the first mounting hole; and The mounting assembly includes a plurality of first guide members, which are spaced apart circumferentially along the first mounting hole. Each first guide member is connected at one end to the cylinder head and at the other end through the positioning part along a first direction, so that the pre-combustion chamber body can move along the first guide member into the first mounting hole. The first direction is parallel to the central axis of the first mounting hole. The mounting assembly includes a second guide and an operating member. The second guide is connected to the end of the first guide away from the cylinder head. The operating member passes through the guide and is connected to the pre-combustion component. The operating member is movable relative to the second guide and drives the pre-combustion component to move along the first guide. The installation assembly further includes a connector disposed between the second guide and the pre-ignition member, the connector being connected to the pre-ignition member, and the operating member passing through the guide and being connected to the connector.

2. The cylinder head assembly of claim 1, wherein, The connector is provided with a connecting cavity, which is open along the first direction, and one end of the operating member can be accommodated in the connecting cavity.

3. The cylinder head assembly of claim 2, wherein, The mounting assembly further includes a fixing member, and the connector is provided with a fixing hole. The fixing hole communicates with the mating cavity and is arranged along the circumference of the mating cavity. The fixing member is configured to pass through the fixing hole and connect to the operating member, so that the operating member is fixed in the mating cavity.

4. The cylinder head assembly of any one of claims 1-3, wherein, The pre-combustion chamber body includes a first mating part and a second mating part. The positioning part is connected to the end of the first mating part near the second guide member, and the second mating part is connected to the end of the first mating part away from the second guide member. The diameter of the outer peripheral wall of the second mating part is smaller than the diameter of the outer peripheral wall of the first mating part. A stepped surface is provided in the first mounting hole, and the first mating part can abut against the stepped surface.

5. The cylinder head assembly of claim 4, wherein, The pre-combustion chamber body also includes a third mating part, which is connected to the end of the second mating part away from the first guide member. The diameter of the outer peripheral wall of the third mating part is smaller than the diameter of the outer peripheral wall of the second mating part. The third mating part is transitionally fitted with the end of the first mounting hole away from the first guide member.

6. The cylinder head assembly of claim 4, wherein, The cylinder head assembly further includes a sealing assembly, which includes at least a first seal and a second seal. The first seal is disposed between the positioning portion and the cylinder head, and the second seal is disposed between the first mating portion and the stepped surface.

7. The cylinder head assembly of claim 1, wherein, The cylinder head assembly further comprises an oil injector, and the cylinder head is further provided with a second mounting hole, a center axis of the second mounting hole is inclined relative to a center axis of the first mounting hole and is communicated with the first mounting hole, and the oil injector is arranged in the second mounting hole and is capable of abutting against the pre-combustion element.

8. An engine characterized by, The cylinder head assembly as claimed in any one of claims 1-7.

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