Cylinder head assembly, internal combustion engine and vehicle

Abstract

This application relates to a cylinder head assembly, an internal combustion engine, and a vehicle. The cylinder head assembly includes a cylinder head, a drive assembly, and a switching member. The cylinder head has a first support wall and a second support wall arranged at a distance from each other. The first support wall has a clearance recess, and the bottom wall of the clearance recess has a first mounting surface. The support wall has a first fastener for fixing it to the cylinder block. The drive assembly drives the switching member to move. Along the central axis of the cylinder head, the first fastener is located below the switching member and the drive assembly, and the switching member is located above the top surface of the first support wall or at least partially protrudes into the clearance recess. In the above-described cylinder head assembly, internal combustion engine, and vehicle, the switching member is not interfered with by the first fastener and operates stably under the drive of the drive assembly. Consequently, the structure of the cylinder head assembly is more compact, reducing the dimensions along the central axis of the cylinder head.

Description

Technical Field

[0001] This application relates to the field of internal combustion engine technology, and in particular to a cylinder head assembly, an internal combustion engine, and a vehicle. Background Technology

[0002] When an internal combustion engine is running, the crankshaft drives the camshaft to rotate. A cam is fixed to the camshaft, and this cam abuts against one end of a rocker arm. The rotating cam opens and closes the valves. The cam includes a base circle and a cam portion. The base circle is the cylindrical portion of the cam's outer surface, while the cam portion protrudes from the base circle. When the rocker arm abuts against the base circle, the valve is closed; when the cam portion abuts against the rocker arm, the valve is open. However, the valve opening size is fixed, meaning the valve lift is constant. The engine speed, on the other hand, varies. As the engine speed increases, the demand for intake air increases. An internal combustion engine with a fixed valve lift will result in incomplete combustion, affecting emissions and fuel economy.

[0003] Given the aforementioned problems, variable valve lift technology was developed for internal combustion engines. Variable valve lift (VVL) is an advanced internal combustion engine technology that allows the valve opening degree to automatically adjust during engine operation to adapt to different operating conditions, thereby improving engine performance and efficiency. Variable valve lift technology optimizes the intake volume and efficiency of the internal combustion engine at different speeds and loads by changing the valve opening degree (i.e., lift). This technology helps improve low-speed torque, high-speed power, and fuel economy.

[0004] In VVL internal combustion engines of related technologies, the drive assembly for adjusting valve lift is typically mounted on the cylinder head cover. This drive assembly moves the engagement pin, causing the high-speed intake rocker arm and low-speed intake rocker arm to engage or disengage, thereby adjusting the intake valve lift. However, the drive assembly increases the overall size of the VVL internal combustion engine along the cylinder center axis, hindering miniaturization. Summary of the Invention

[0005] Therefore, it is necessary to provide a cylinder head assembly, internal combustion engine, and vehicle that can reduce the size along the cylinder center axis to solve at least one problem in the related technology, thereby facilitating miniaturization.

[0006] On one hand, this application provides a cylinder head assembly, including:

[0007] A cylinder head, wherein the cylinder head is provided with a first support wall and a second support wall arranged at relative intervals, the first support wall is provided with an avoidance recess, and the bottom wall of the avoidance recess is provided with a first mounting surface;

[0008] The first fastener is provided as one, and the first fastener passes through the cylinder head from the first mounting surface along the central axis parallel to the cylinder head. The first fastener is used to fix and connect with the cylinder body.

[0009] A drive assembly and a switching component, wherein the drive assembly cooperates with the switching component, and the drive assembly is used to drive the switching component to move; along the central axis of the cylinder head, the first fastener is located below the switching component and the drive assembly, and the switching component is located above the top surface of the first support wall or at least partially protrudes into the clearance recess;

[0010] The second fastener consists of three fasteners. One of the second fasteners passes through the cylinder head from the top surface of the first support wall along a central axis parallel to the cylinder head and is fixedly connected to the cylinder body. The other two second fasteners each pass through the cylinder head from the top surface of the second support wall along a central axis parallel to the cylinder head and are fixedly connected to the cylinder body. The length of the first fastener is less than the length of the second fastener.

[0011] In one embodiment, both the first fastener and the second fastener are double-ended studs, and the diameter of the smooth rod portion of the first fastener is smaller than the diameter of the smooth rod portion of the second fastener.

[0012] In one embodiment, the drive assembly is provided with a drive part that cooperates with the switching member, and the drive part is located above the top surface of the first support wall or at least partially extends into the avoidance recess.

[0013] In one embodiment, the cylinder head assembly further includes a first nut and a second nut, the first nut being fixed to the first mounting surface and connected to the first fastener; the top surfaces of the first support wall and the second support wall are each provided with a second mounting surface corresponding to the second fastener, the second nut being fixed to the second mounting surface and connected to the second fastener.

[0014] In one embodiment, the second mounting surface protrudes from the top surface of the first support wall or the second support wall, and the distance between the second mounting surface and the top surface along the central axis of the cylinder head is S, where S is 0.5 mm to 2 mm.

[0015] In one embodiment, in the direction of the central axis of the cylinder head, the central axis of the drive assembly is located between the top surface of the first fastener and the top surface of the second fastener; and / or, in the direction of the central axis of the cylinder head, the central axis of the drive assembly is located above the mating surface of the cylinder head and the cylinder head cover.

[0016] In one embodiment, the drive assembly is connected to the outer wall of the cylinder head.

[0017] In one embodiment, the drive assembly is provided with a first mounting portion, and the cylinder head assembly further includes a third fastener, wherein the first mounting portion is mounted to the outer wall of the cylinder head via the third fastener; and / or, in the direction of the central axis of the cylinder head, the connection position between the drive assembly and the cylinder head is located below the mating surface of the cylinder head and the cylinder head cover.

[0018] On the other hand, an internal combustion engine includes the cylinder head assembly, a cylinder head cover, and a cylinder block; the cylinder head is connected to the cylinder head cover, and the cylinder head is also connected to the cylinder block via the first fastener.

[0019] In another aspect, this application also provides a vehicle including the aforementioned internal combustion engine.

[0020] In the aforementioned cylinder head assembly, internal combustion engine, and vehicle, the first support wall has a clearance recess, and a first mounting surface is provided on the bottom wall of the clearance recess. A first fastener is fixed to the first mounting surface, with the top end of the first fastener located within the clearance recess. Furthermore, along the central axis of the cylinder head, the first fastener is located below the switching component and the drive assembly, while the switching component is located above the top surface of the first support wall or at least partially protrudes into the clearance recess. The clearance recess provides clearance, preventing interference from the first fastener and ensuring stable operation of the switching component under the drive of the drive assembly. Consequently, the cylinder head assembly has a more compact structure, reducing its dimensions along the central axis of the cylinder head. Attached Figure Description

[0021] Figure 1 This is a structural diagram of an internal combustion engine according to an embodiment of this application.

[0022] Figure 2 This is a structural view of a cylinder head assembly according to an embodiment of this application.

[0023] Figure 3 This is a structural diagram of a cylinder head assembly according to an embodiment of the present application, showing the first fastener being fixed to the first mounting surface.

[0024] Figure 4 This is another structural view of the cylinder head assembly according to an embodiment of this application, showing the first fastener being fixed to the first mounting surface.

[0025] Figure 5 This is a structural diagram of the first fastener and the second fastener in a cylinder head assembly according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Cylinder head; 11. Main structure; 111. Intake port; 112. Exit port; 113. Mating surface; 12. First support wall; 121. Clearance recess; 1211. First mounting surface; 122. Second mounting surface; 13. Second support wall; 20. Valve train assembly; 21. Intake valve; 22. Exhaust valve; 23. Cam mechanism; 24. First rocker arm shaft; 25. Second rocker arm shaft; 261. First intake rocker arm; 2 62. Second intake rocker arm; 27. Exhaust rocker arm; 30. Crankshaft; 40. Drive assembly; 41. Drive unit; 42. First mounting part; 43. Second mounting part; 50. Switching component; 61. First fastener; 62. Second fastener; 63. Third fastener; 64. First nut; 65. Second nut; 70. Cylinder head cover; 80. Cylinder block; 90. Piston; S. Central axis; m. Central axis; Z. Axial direction. Detailed Implementation

[0028] 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.

[0029] As described in the background section, the drive assembly used to adjust valve lift in VVL engines of the related art increases the overall size of the VVL internal combustion engine along the cylinder center axis, which is not conducive to miniaturization. Therefore, this application provides a cylinder head assembly, internal combustion engine, and vehicle that can reduce the size along the cylinder center axis, facilitating miniaturization.

[0030] The following will combine Figures 1 to 5 A detailed description will be provided of a cylinder head assembly, an internal combustion engine, and a vehicle according to an embodiment of this application.

[0031] The internal combustion engines provided in this application embodiment include, but are not limited to, two-valve or four-valve internal combustion engines, etc., and are not limited thereto. They can be flexibly adjusted and set according to actual needs. The internal combustion engine in this embodiment can be applied to high-performance cars, SUVs, or motorcycles, etc., and can reduce the size along the cylinder center axis, which is convenient for miniaturization.

[0032] See Figures 1 to 3 , Figure 1 A structural diagram of an internal combustion engine according to an embodiment of this application is shown. Figure 2 and Figure 3The diagrams show two different structural views of a cylinder head assembly according to an embodiment of this application. The cylinder head assembly provided in one embodiment of this application includes a cylinder head 10 and a valve train assembly 20. The valve train assembly 20 is installed inside the cylinder head 10 and is used to precisely control the intake and exhaust processes of the internal combustion engine, ensuring that the engine draws in fresh air or a combustible mixture at the correct time and promptly discharges the exhaust gas after combustion, thereby achieving efficient air exchange and maintaining the normal operating cycle of the engine.

[0033] Please see Figures 1 to 3 For example, the cylinder head 10 includes a main structure 11 and supporting walls. The supporting walls are located within the main structure 11. Optionally, two supporting walls are provided, arranged relatively apart within the main structure 11. The two supporting walls include a first supporting wall 12 and a second supporting wall 13. The main structure 11 is also provided with an air inlet 111 and an air outlet 112, which are located on opposite sides of the main structure 11. Fresh air or a combustible mixture enters the combustion chamber through the air inlet 111, and the exhaust gas after combustion is discharged outward through the exhaust port.

[0034] For example, the valve train assembly 20 includes an intake valve 21 and an exhaust valve 22. The intake valve 21 is used to open or close the intake port 111, and the exhaust valve 22 is used to open or close the exhaust port 112.

[0035] Please see Figures 1 to 3 For example, the valve train assembly 20 also includes a cam mechanism 23, a first rocker arm shaft 24, a second rocker arm shaft 25, an intake rocker arm, and an exhaust rocker arm 27. The cam mechanism 23, the first rocker arm shaft 24, and the second rocker arm shaft 25 are each mounted on a support wall and can be stably supported by the support wall. The cam mechanism 23 is also connected to the crankshaft 30, and the cam mechanism 23 rotates under the drive of the crankshaft 30. The intake rocker arm is rotatably mounted on the first rocker arm shaft 24, which supports the intake rocker arm. The exhaust rocker arm 27 is rotatably mounted on the second rocker arm shaft 25, which supports the exhaust rocker arm 27. The intake rocker arm is positioned between the cam mechanism 23 and the intake valve 21, and the intake rocker arm can convert the movement of the cam mechanism 23 into the opening or closing of the intake valve 21. The exhaust rocker arm 27 is positioned between the cam mechanism 23 and the exhaust valve 22. The exhaust rocker arm 27 can convert the movement of the cam mechanism 23 into the opening or closing of the exhaust valve to ensure sufficient mixing and combustion of fuel and air. The cam mechanism 23, the intake rocker arm, and the exhaust rocker arm work as a single unit, controlling the opening and closing of the intake valve 21 and the exhaust valve.

[0036] Please see Figure 1Based on the aforementioned embodiments, the intake rocker arm includes a first intake rocker arm 261 and a second intake rocker arm 262. The first intake rocker arm 261 and the second intake rocker arm 262 are each rotatably mounted on a first rocker arm shaft 24. Each of the first intake rocker arm 261 and the second intake rocker arm 262 abuts against a cam mechanism 23 and swings under the drive of the cam mechanism 23. The second intake rocker arm 262 and the first intake rocker arm 261 are arranged side-by-side along the axial direction Z of the first rocker arm shaft 24.

[0037] Based on the aforementioned embodiments, the cylinder head assembly further includes a drive assembly 40 and a switching component 50. The drive assembly 40 and the switching component 50 cooperate with each other, and the drive assembly 40 is used to drive and adjust the switching component 50 to a first position or a second position along the axial direction Z of the first rocker arm shaft 24. When the switching component 50 is driven by the drive assembly 40 to the first position, the first intake rocker arm 261 and the second intake rocker arm 262 are connected to each other through the switching component 50 and swing synchronously. The first intake rocker arm 261 swings according to the swing amplitude of the second intake rocker arm 262, thereby increasing the lift of the intake valve 21 and increasing the intake volume, ensuring more complete combustion of the engine, reducing emissions, and meeting the needs of high-speed vehicle operation. When the switching component 50 is adjusted to the second position, the first intake rocker arm 261 and the second intake rocker arm 262 swing independently. At this time, the lift of the intake valve 21 is controlled by the first intake rocker arm 261, that is, it opens or closes under the drive of the first intake rocker arm 261, while the second intake rocker arm 262 does not come into contact with the intake valve 21, so its movement does not affect the lift of the intake valve 21. Compared with the first position, in the second position, the lift of the intake valve 21 is smaller and the intake volume is smaller.

[0038] Please see Figure 3 and Figure 4 For example, the first support wall 12 is provided with a relief recess 121, and the bottom wall of the relief recess 121 is provided with a first mounting surface 1211. The cylinder head assembly also includes a first fastener 61. The first fastener 61 includes, but is not limited to, bolts, screws, pins, etc., and can be flexibly adjusted and set according to actual needs, without limitation here. In this embodiment, the first fastener 61 is specifically set as a double-ended stud. There is one first fastener 61. The first fastener 61 passes through the cylinder head 10 from the first mounting surface 1211 along the central axis S parallel to the cylinder head 10, and the first fastener 61 is used to fix it to the cylinder body 80, so that the cylinder head 10 and the cylinder body 80 are fixedly connected.

[0039] It should be noted that the "parallelism" in this embodiment is not "parallelism" in a strict mathematical sense. There may be deviations within ±10°, which are sufficient to satisfy the visual perception of "parallelism". No special restrictions are imposed here.

[0040] For example, the drive assembly 40 is connected to the outer wall of the cylinder head 10, which serves to mount and support the drive assembly 40, thereby ensuring the stability of the drive assembly 40. Furthermore, the drive assembly 40 can be mounted on the outer wall of the cylinder head 10, with the cylinder head 10 bearing and supporting it. The wall thickness of the cylinder head 10 is greater than the wall thickness of the cylinder head cover 70, resulting in better installation stability compared to mounting the drive assembly 40 entirely onto the cylinder head cover 70.

[0041] The recess 121 serves to avoid interference between the switching component 50 and the drive assembly 40 caused by the support wall, allowing them to assemble smoothly. Furthermore, along the central axis S of the cylinder head 10, the first fastener 61 is located below the switching component 50 and the drive assembly 40, with the switching component 50 positioned above the top surface of the first support wall 12 or at least partially extending into the recess 121.

[0042] Please see Figures 3 to 5 For example, the cylinder head assembly also includes a second fastener 62. The second fastener 62 includes, but is not limited to, bolts, threaded rods, pins, etc., and can be flexibly adjusted and set according to actual needs, without limitation here. In this embodiment, the second fastener 62 is specifically set as a double-ended stud. Three second fasteners 62 are provided, one of which extends from the top surface of the first support wall 12 along a central axis S parallel to the cylinder head 10, passing through the cylinder head 10 and fixedly connected to the cylinder body 80. The other two second fasteners 62 each extend from the top surface of the second support wall 13 along a central axis S parallel to the cylinder head 10, passing through the cylinder head 10 and fixedly connected to the cylinder body 80. The length of the first fastener 61 is less than the length of the second fastener 62, such as... Figure 5 As shown.

[0043] Therefore, since the first support wall 12 is provided with a clearance recess 121, a first mounting surface 1211 is provided on the bottom wall of the clearance recess 121, and a first fastener 61 is fixed to the first mounting surface 1211, with the top end of the first fastener 61 located inside the clearance recess 121. Furthermore, along the central axis S direction of the cylinder head 10, the first fastener 61 is located below the switching member 50 and the drive assembly 40, and the switching member 50 is located above the top surface of the first support wall 12 or at least partially protrudes into the clearance recess 121. The clearance recess 121 provides clearance, preventing the switching member 50 from being interfered with by the first fastener 61, and allowing it to operate stably under the drive of the drive assembly 40. Consequently, the cylinder head assembly has a more compact structure, reducing its dimensions along the central axis S direction of the cylinder head 10.

[0044] Based on the aforementioned embodiments, both the first fastener 61 and the second fastener 62 are configured as double-ended studs. The diameter of the polished shank of the first fastener 61 is smaller than that of the polished shank of the second fastener 62. Thus, the diameters of the polished shanks of the first fastener 61 and the second fastener 62 are reasonably set, achieving compatibility with engine performance. Specifically, in the design of the double-ended stud, on the one hand, the diameter of the polished shank cannot be small, as the stud needs to withstand the combustion pressure of the engine ignition (without plastic deformation), and a certain safety margin is generally reserved during the design calculation; on the other hand, the diameter of the polished shank cannot be large, and the double-ended stud design needs to satisfy reasonable following characteristics, i.e., the bolt lengthens under stress → shortens under stress / at the end of stress with a rapid response, ensuring a tight seal between the cylinder head 10, the cylinder head gasket, and the cylinder block 80.

[0045] It should be noted that the drive component 40 and the switching component 50 can be directly connected, indirectly connected, or mated together. The specific connection can be flexibly adjusted and set according to actual needs, as long as the drive component 40 can be used to adjust the position of the switching component 50. The specific connection relationship between the drive component 40 and the switching component 50 is not particularly restricted here.

[0046] In some specific embodiments, the first intake rocker arm 261 is provided with a first mating hole, and the second intake rocker arm 262 is provided with a second mating hole. The switching member 50 passes through the first mating hole. Optionally, the switching member 50 includes a connecting pin, which passes through the first mating hole. The drive assembly 40 and the switching member 50 abut against each other along the axial direction Z of the first rocker arm shaft 24. When the first intake rocker arm 261 and the second intake rocker arm 262 abut against the base circle of the cam mechanism 23, that is, when the intake valve 21 is in the closed state, the second mating hole and the first mating hole are aligned and connected along the axial direction Z of the first rocker arm. The drive assembly 40 can drive the switching member 50 to move along the axial direction Z of the first rocker arm shaft 24, so that the connecting pin moves from the second position to the first position and enters the second mating hole. In this way, the first intake rocker arm 261 and the second intake rocker arm 262 are joined together by the connecting pin. Alternatively, the connecting pin can be moved from the first position to the second position, thereby disconnecting the first intake rocker arm 261 and the second intake rocker arm 262, that is, separating them from each other.

[0047] To improve the positioning accuracy of the switching component 50, the switching component 50 also includes a reset component. The reset component is connected between the engaging pin and the first intake rocker arm 261. Specifically, when the drive assembly 40 pushes the engaging pin, the engaging pin enters the second mating hole, and the reset component undergoes elastic deformation; when the drive assembly 40 releases the engaging pin, the engaging pin will be reset from the second position to the first position under the action of the reset component.

[0048] Based on the aforementioned embodiments, the drive assembly 40 is provided with a drive section 41. The drive section 41 cooperates with the switching member 50. Optionally, the drive assembly 40 includes a solenoid valve, which provides power, or other power mechanisms may be used, without particular limitation. When the drive assembly 40 is working, it can drive the drive section 41 to move back and forth along the axial direction Z of the first rocker arm shaft 24, thereby driving the switching member 50 to move. The drive section 41 is located above the top surface of the first support wall 12 or at least partially extends into the avoidance recess 121. The avoidance recess 121 can avoid the drive section 41. In this way, the drive section 41 will not be interfered with by the support wall during operation and can move stably and reliably. Furthermore, it can achieve a compact overall structure of the cylinder head assembly and reduce the size of the cylinder head assembly along the central axis S direction of the cylinder head 10.

[0049] Please see Figure 3 Specifically, the top surfaces of both the first support wall 12 and the second support wall 13 are provided with a second mounting surface 122 corresponding to the second fastener 62. There are multiple second mounting surfaces 122, specifically the same number as the second fasteners 62. Each second fastener 62 is correspondingly fixed to its respective second mounting surface 122. The second mounting surface 122 can be flat to ensure the stability of the second fastener 62 installation. Along the central axis S of the cylinder head 10, the second mounting surface 122 is higher than the top surface of the support wall, which refers to the wall surface of the support wall facing the cylinder head cover 70. Alternatively, the second mounting surface 122 can be understood as protruding towards the cylinder head cover 70. Optionally, the distance between the second mounting surface 122 and the top surface of the support wall along the central axis S of the cylinder head 10 is, but not limited to, 0.5mm to 2mm, specifically, for example, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, or 2mm, etc., without particular limitation, and can be flexibly adjusted and set according to actual needs. This avoids sharp edge defects during assembly and use when the top surface of the supporting wall is flat, thereby improving product quality. Especially when the second fastener 62 is a bolt, the nut that tightens with it is correspondingly installed on the second mounting surface 122. If the entire top surface of the supporting wall is flat, sharp edge defects during assembly and use will be obvious. However, with the second mounting surface 122 partially protruding, the mutual abutment between the second mounting surface 122 and the nut that tightens with the second fastener 62 reduces the probability of quality defects on the top surface of the supporting wall, thus improving product quality.

[0050] In some specific embodiments, both the first fastener 61 and the second fastener 62 are bolts. Bolts include, but are not limited to, stud bolts. The cylinder head assembly also includes a first nut 64 and a second nut 65. The first nut 64 is fixed to the first mounting surface 1211 and connected to the first fastener 61. The second nut 65 is fixed to the second mounting surface 122 and connected to the second fastener 62.

[0051] Based on the aforementioned embodiment, the length of the first fastener 61 is less than the length of the second fastener 62. Thus, the first fastener 61 can avoid the drive unit 41 and switching member 50 located above it, allowing the cylinder head assembly to be smaller in size along the central axis S, achieving a miniaturized design.

[0052] Please see Figure 3 In some embodiments, along the central axis S of the cylinder head 10, the central axis m of the drive assembly 40 is located between the top surface of the first fastener 61 and the top surface of the second fastener 62. The top surface of the first fastener 61 refers to the surface of the first fastener 61 near the cylinder head cover 70. The top surface of the second fastener 62 refers to the surface of the second fastener 62 near the cylinder head cover 70. Thus, the drive assembly 40 is positioned appropriately on the cylinder head 10, allowing for a reduction in the size of the cylinder head assembly along the central axis S, achieving a miniaturized design.

[0053] In some embodiments, in the direction of the central axis S of the cylinder head 10, the central axis m of the drive assembly 40 is located above the mating surface 113 between the cylinder head 10 and the cylinder head cover 70. This facilitates a sealing fit between the cylinder head cover 70 and the cylinder head 10.

[0054] Please see Figure 3 In some embodiments, the drive assembly 40 is provided with a first mounting portion 42. The cylinder head assembly also includes a third fastener 63, which includes, but is not limited to, bolts, pins, screws, or rivets. The first mounting portion 42 is mounted to the outer wall of the cylinder head 10 via the third fastener 63. Along the central axis S of the cylinder head 10, the connection point between the drive assembly 40 and the cylinder head 10 is located below the mating surface 113 between the cylinder head 10 and the cylinder head cover 70. Specifically, the outer wall of the cylinder head 10 is provided with a third mounting surface, and the first mounting portion 42 is fixed to the third mounting surface via the third fastener 63. Along the central axis S of the cylinder head 10, the third mounting surface is located below the mating surface 113 between the cylinder head 10 and the cylinder head cover 70. This allows for a reduction in the size of the cylinder head assembly along the central axis S, achieving a miniaturized design.

[0055] Please see Figure 1 and Figure 3Based on the aforementioned embodiments, the drive assembly 40 further includes a second mounting portion 43. The second mounting portion 43 is fixedly mounted to the cylinder head cover 70. Thus, the drive assembly 40 is not only mounted to the cylinder head 10 via the first mounting portion 42 and supported by the cylinder head 10, but also fixedly mounted to the cylinder head cover 70 via the second mounting portion 43, where it is supported and carried by the cylinder head cover 70, resulting in a stable and reliable installation. Specifically, the second mounting portion 43 is fixed to the cylinder head cover 70 by a fourth fastener. The fourth fastener includes, but is not limited to, bolts, screws, pins, or rivets.

[0056] In some embodiments, the internal combustion engine of this application may specifically be a variable valve lift internal combustion engine.

[0057] For example, the internal combustion engine includes the cylinder head assembly of any of the foregoing embodiments.

[0058] The aforementioned internal combustion engine includes a cylinder head assembly, and the technical effects are brought about by the cylinder head assembly. The beneficial effects include those of the cylinder head assembly, which will not be elaborated here.

[0059] For example, the internal combustion engine also includes a cylinder head cover 70 and a cylinder block 80. The cylinder head 10 is connected to the cylinder head cover 70. Optionally, the cylinder head 10 and the cylinder head cover 70 are connected and secured by one or more fifth fasteners.

[0060] The cylinder head 10 is connected to the cylinder block 80 via a first fastener 61. The cylinder head 10 is also connected to the cylinder block 80 via a second fastener 62. The cylinder head 10 and the cylinder block 80 cooperate to form a combustion chamber.

[0061] Please see Figure 1 For example, the internal combustion engine also includes a crankshaft 30 and a crankshaft 30 housing. The crankshaft 30 is installed inside the crankshaft 30 housing. A first fastener 61 and a second fastener 62 are also connected and fixed to the crankshaft 30 housing. In this way, the crankshaft 30 housing, cylinder block 80, and cylinder head 10 can be securely assembled together. The cylinder block 80 contains a piston 90 and a piston 90 pin. The piston 90 pin is connected to the piston 90, and the piston 90 pin is also connected to the crankshaft 30 via a connecting rod. When the internal combustion engine is working, the kinetic energy generated by combustion in the combustion chamber drives the piston 90 to move. The piston 90 reciprocates axially inside the cylinder block 80, driving the crankshaft 30 to move.

[0062] In some embodiments, this application also provides a vehicle, which includes, but is not limited to, automobiles, buses, motorcycles, etc., without limitation. The vehicle includes a body and an internal combustion engine, the internal combustion engine being mounted on the body.

[0063] The aforementioned vehicles, since they include an internal combustion engine, have technical effects brought about by the internal combustion engine, and the beneficial effects include those of the internal combustion engine, which will not be elaborated further here.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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 in that, include: A cylinder head, wherein the cylinder head is provided with a first support wall and a second support wall arranged at relative intervals, the first support wall is provided with an avoidance recess, and the bottom wall of the avoidance recess is provided with a first mounting surface; The first fastener is provided as one, and the first fastener passes through the cylinder head from the first mounting surface along the central axis parallel to the cylinder head. The first fastener is used to fix and connect with the cylinder body. A drive assembly and a switching component, wherein the drive assembly cooperates with the switching component, and the drive assembly is used to drive the switching component to move; along the central axis of the cylinder head, the first fastener is located below the switching component and the drive assembly, and the switching component is located above the top surface of the first support wall or at least partially protrudes into the clearance recess; The second fastener consists of three fasteners. One of the second fasteners passes through the cylinder head from the top surface of the first support wall along a central axis parallel to the cylinder head and is fixedly connected to the cylinder body. The other two second fasteners each pass through the cylinder head from the top surface of the second support wall along a central axis parallel to the cylinder head and are fixedly connected to the cylinder body. The length of the first fastener is less than the length of the second fastener.

2. The cylinder head assembly according to claim 1, characterized in that, Both the first fastener and the second fastener are double-ended studs, and the diameter of the smooth part of the first fastener is smaller than the diameter of the smooth part of the second fastener.

3. The cylinder head assembly according to claim 1 or 2, characterized in that, The drive assembly is provided with a drive part, which cooperates with the switching component. The drive part is located above the top surface of the first support wall or at least partially extends into the avoidance recess.

4. The cylinder head assembly according to claim 2, characterized in that, The cylinder head assembly further includes a first nut and a second nut. The first nut is fixed to the first mounting surface and connected to the first fastener. The top surfaces of the first support wall and the second support wall are each provided with a second mounting surface corresponding to the second fastener. The second nut is fixed to the second mounting surface and connected to the second fastener.

5. The cylinder head assembly according to claim 4, characterized in that, The second mounting surface protrudes from the top surface of the first support wall or the second support wall, and the distance between the second mounting surface and the top surface along the central axis of the cylinder head is S, where S is 0.5mm to 2mm.

6. The cylinder head assembly according to claim 4, characterized in that, In the direction of the central axis of the cylinder head, the central axis of the drive assembly is located between the top surface of the first fastener and the top surface of the second fastener; and / or, in the direction of the central axis of the cylinder head, the central axis of the drive assembly is located above the mating surface of the cylinder head and the cylinder head cover.

7. The cylinder head assembly according to claim 1, characterized in that, The drive assembly is connected to the outer wall of the cylinder head.

8. The cylinder head assembly according to claim 7, characterized in that, The drive assembly is provided with a first mounting portion, and the cylinder head assembly further includes a third fastener. The first mounting portion is mounted to the outer wall of the cylinder head by the third fastener; and / or, in the direction of the central axis of the cylinder head, the connection position between the drive assembly and the cylinder head is located below the mating surface of the cylinder head and the cylinder head cover.

9. An internal combustion engine, characterized in that, The assembly includes the cylinder head assembly as described in any one of claims 1 to 8, and further includes a cylinder head cover and a cylinder block; the cylinder head is connected to the cylinder head cover, and the cylinder head is also connected to the cylinder block via the first fastener.

10. A vehicle, characterized in that, Including the internal combustion engine as described in claim 9.

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