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 first fastener, a cylinder head cover, a drive assembly, and a switching component. The cylinder head cover is connected to the cylinder head via the first fastener. The outer wall of the cylinder head cover has a first mating surface, and the distance between the first mating surface and a reference line is greater than the distance between the first fastener and the reference line. The drive assembly cooperates with the switching component and is used to drive the switching component to move. The drive assembly has a second mating surface, which abuts against the first mating surface. The drive assembly will not interfere with the first fastener, thus eliminating the need to increase the height dimension of the cylinder head cover along the central axis, allowing for better control of the cylinder head cover's height dimension along the central axis, and enabling miniaturization of the internal combustion engine. Furthermore, the drive assembly does not encroach on the mating surface between the cylinder head cover and the cylinder head, thereby ensuring the sealing between the cylinder head cover and the cylinder head.

Description

Technical Field

[0001] This application relates to the field of 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] This application provides a cylinder head assembly, including:

[0007] Cylinder head;

[0008] First fastener;

[0009] A cylinder head cover is connected to the cylinder head via a first fastener. The outer wall of the cylinder head cover has a first mating surface. The first mating surface and the first fastener are located on the same side of the cylinder head cover. A straight line passing through the center of the cylinder head assembly and parallel to the first mating surface is set as a reference line. The reference line is also perpendicular to the arrangement direction of the cylinder head cover and the cylinder head. The distance between the first mating surface and the reference line is greater than the distance between the first fastener and the reference line.

[0010] A driving component and a switching component are provided. The driving component cooperates with the switching component. The driving component is used to drive the switching component to move. The driving component is provided with a second mating surface, which abuts against the first mating surface.

[0011] In one embodiment, the cylinder head cover is provided with a mounting hole, and the drive assembly is provided with a drive part, which extends into the cylinder head cover through the mounting hole and cooperates with the switching component.

[0012] In one embodiment, a boss is provided on the outer wall of the cylinder head cover, the first mating surface is disposed on the boss, and the mounting hole penetrates the boss; and / or,

[0013] The cylinder head assembly also includes an oil seal sleeved outside the drive unit. The wall of the mounting hole is provided with a third mating surface, which abuts against the oil seal. The third mating surface and the first mating surface are respectively located on opposite sides of the first fastener.

[0014] In one embodiment, the drive assembly includes a solenoid valve; the solenoid valve is provided with a connecting sleeve that extends into the mounting hole and abuts against the side of the oil seal away from the third mating surface, and the outer wall of the connecting sleeve is sealed to the wall of the mounting hole.

[0015] In one embodiment, the drive assembly further includes a sealing ring, which is fitted over the connecting sleeve and seals against the wall of the mounting hole.

[0016] In one embodiment, the cylinder head assembly further includes a valve train assembly installed within the cylinder head; the valve train assembly includes a first rocker arm shaft, a first intake rocker arm, and a second intake rocker arm, the first rocker arm shaft being installed in the cylinder head, the first intake rocker arm and the second intake rocker arm being rotatably installed on the first rocker arm shaft, the first intake rocker arm being provided with a valve pusher portion; along the direction of the reference line, the valve pusher portion is disposed between the first fastener and the rotation axis of the drive assembly.

[0017] In one embodiment, the first intake rocker arm is provided with a first docking hole, and the second intake rocker arm is provided with a second docking hole; the switching component passes through the first docking hole; and the drive assembly abuts against the switching component along the rotation axis.

[0018] In one embodiment, the drive assembly has a first mounting portion and a second mounting portion; the first mounting portion is fixedly mounted on the outer wall of the cylinder head; and the second mounting portion is fixedly mounted on the outer wall of the cylinder head cover.

[0019] On the other hand, this application also provides an internal combustion engine, including the cylinder head assembly and a cylinder block, wherein the cylinder head is connected to the cylinder block.

[0020] In another aspect, this application also provides a vehicle including the aforementioned internal combustion engine.

[0021] In the aforementioned cylinder head assembly, internal combustion engine, and vehicle, because the distance between the first mating surface and the reference line is greater than the distance between the first fastener and the reference line, the drive assembly is further away from the reference line than the first fastener. Therefore, the drive assembly will not interfere with the first fastener, and thus there is no need to increase the height dimension of the cylinder head cover along the central axis. This allows for better control of the height dimension of the cylinder head cover along the central axis, enabling the miniaturization of the internal combustion engine. Furthermore, the drive assembly does not encroach on the mating surface between the cylinder head cover and the cylinder head, thus ensuring the sealing between the cylinder head cover and the cylinder head. In addition, the cylinder head cover has a large installation space for installing the switching component, which is beneficial for the installation and arrangement of the switching component. If the distance between the first mating surface and the reference line were smaller than the distance between the first fastener and the reference line, the internal space of the cylinder head cover would be reduced, which would be detrimental to the arrangement and installation of the switching component within the cylinder head cover. Attached Figure Description

[0022] Figure 1 This is a structural diagram of a cylinder head assembly according to an embodiment of this application.

[0023] Figure 2 This is a partial cross-sectional view of a cylinder head assembly according to an embodiment of this application. Figure 1 .

[0024] Figure 3 This is a partial cross-sectional view of a cylinder head assembly according to an embodiment of this application. Figure 2 .

[0025] Figure 4 This is another structural view of the cylinder head assembly according to an embodiment of this application.

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

[0027] 10. Cylinder head; 21. First fastener; 22. Second fastener; 23. Third fastener; 24. Fourth fastener; 30. Cylinder head cover; 31. First mating surface; 32. Mounting hole; 321. Third mating surface; 33. Boss; 40. Valve train assembly; 41. First intake rocker arm; 411. Valve pusher; 42. Second intake rocker arm; 50. Drive assembly; 51. Second mating surface; 52. Connecting sleeve; 53. Sealing ring; 54. First mounting part; 55. Drive part; 56. Second mounting part; 60. Switching component; 70. Oil seal; O. Reference line; S. Central axis; Z. Rotation axis. 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 4 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] Please see Figures 1 to 4An embodiment of this application provides a cylinder head assembly including a cylinder head 10, a first fastener 21, and a cylinder head cover 30. The cylinder head cover 30 is connected to the cylinder head 10 via the first fastener 21. The cylinder head assembly may also include a second fastener 22, through which the cylinder head cover 30 is connected to the cylinder head 10. Under the connection of the first fastener 21 and the second fastener 22, the cylinder head cover 30 is securely mounted on the cylinder head 10. The first fastener 21 and the second fastener 22 are each, but are not limited to, bolts, screws, pins, or rivets, etc., and are not limited here; they can be flexibly adjusted and set according to actual needs. The first fastener 21 is one, and the second fastener 22 may be one, two, three, etc. For a specific embodiment, please refer to... Figures 1 to 3 The first fastener 21 is set to one, and the second fastener 22 is set to three. The first fastener 21 and the three second fasteners 22 are respectively set at the four corners of the cylinder head cover 30.

[0033] Please see Figure 3 For example, the cylinder head assembly also includes a valve train assembly 40. The valve train assembly 40 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 right time and exhausts the exhaust gas in a timely manner, thereby achieving efficient air exchange and maintaining the normal operating cycle of the engine.

[0034] For example, the cylinder head 10 is provided with an air inlet and an air outlet, which are located on opposite sides of the cylinder head 10. Fresh air or a combustible mixture enters the combustion chamber through the air inlet, and the exhaust gas after combustion is discharged outward through the exhaust outlet.

[0035] For example, the valve train assembly 40 includes an intake valve and an exhaust valve. The intake valve is used to open or close the intake port, and the exhaust valve is used to open or close the exhaust port.

[0036] For example, the valve train assembly 40 also includes a cam mechanism, a first rocker arm shaft, a second rocker arm shaft, an intake rocker arm, and an exhaust rocker arm. The cam mechanism, the first rocker arm shaft, and the second rocker arm shaft are each mounted on the cylinder head 10 and can be stably supported by the cylinder head 10. The cam mechanism is also connected to the crankshaft, and the cam mechanism rotates under the drive of the crankshaft. The intake rocker arm is rotatably mounted on the first rocker arm shaft, which supports the intake rocker arm. The exhaust rocker arm is rotatably mounted on the second rocker arm shaft, which supports the exhaust rocker arm. The intake rocker arm is positioned between the cam mechanism and the intake valve, and can convert the movement of the cam mechanism into the opening or closing of the intake valve. The exhaust rocker arm is positioned between the cam mechanism and the exhaust valve, and can convert the movement of the cam mechanism into the opening or closing of the exhaust valve to ensure sufficient mixing and combustion of fuel and air. The cam mechanism, the intake rocker arm, and the exhaust rocker arm work as a single unit, controlling the opening and closing of the intake and exhaust valves.

[0037] Based on the aforementioned embodiments, the intake rocker arm includes a first intake rocker arm 41 and a second intake rocker arm 42. The first intake rocker arm 41 and the second intake rocker arm 42 are each rotatably mounted on a first rocker arm shaft. Each of the first intake rocker arm 41 and the second intake rocker arm 42 abuts against a cam mechanism and swings under the drive of the cam mechanism. The second intake rocker arm 42 and the first intake rocker arm 41 are arranged side-by-side along the axial direction of the first rocker arm shaft.

[0038] Based on the aforementioned embodiments, the cylinder head assembly further includes a drive assembly 50 and a switching component 60. The drive assembly 50 and the switching component 60 cooperate with each other. The drive assembly 50 is used to drive and adjust the switching component 60 to a first position or a second position along the axial direction of the first rocker arm shaft. When the switching component 60 is driven and adjusted to the first position by the drive assembly 50, the first intake rocker arm 41 and the second intake rocker arm 42 are connected to each other through the switching component 60 and swing synchronously. The first intake rocker arm 41 will swing according to the swing amplitude of the second intake rocker arm 42, thereby increasing the lift of the intake valve, increasing the intake volume, ensuring more complete combustion of the engine, reducing emissions, and meeting the requirements of high-speed vehicle operation. When the switching component 60 is adjusted to the second position, the first intake rocker arm 41 and the second intake rocker arm 42 swing independently. At this time, the lift of the intake valve is controlled by the first intake rocker arm 41, that is, it opens or closes under the drive of the first intake rocker arm 41, while the second intake rocker arm 42 does not come into contact with the intake valve, so its action does not affect the lift of the intake valve. Compared to the first position, the second position has a smaller intake valve lift and a smaller intake volume.

[0039] Please see Figure 1For example, the outer wall of the cylinder head cover 30 is provided with a first mating surface 31. The first mating surface 31 and the first fastener 21 are located on the same side of the cylinder head cover 30. A straight line passing through the center of the cylinder head assembly and parallel to the first mating surface 31 is designated as a reference line O. The reference line O is also perpendicular to the arrangement direction of the cylinder head cover 30 and the cylinder head 10. The distance D1 between the first mating surface 31 and the reference line O is greater than the distance D2 between the first fastener 21 and the reference line O. The drive assembly 50 is provided with a second mating surface 51, which abuts against the first mating surface 31.

[0040] Specifically, the entire first fastener 21 is located on the side of the first mating surface 31 closest to the reference line O. Specifically, the cross-sectional profile of the first fastener 21 is circular, with a radius of R, and D1-D2 > R. Optionally, 1.05 ≤ D1-D2 / R ≤ 1.5, specifically, for example, 1.05, 1.1, 1.2, 1.3, 1.4, or 1.5. When D1-D2 / R < 1.05, interference may easily occur between the drive assembly 50 and the first fastener 21, leading to installation difficulties; when D1-D2 / R > 1.5, the size of the cylinder head assembly along the driving direction of the drive assembly 50 will increase, resulting in a larger internal combustion engine size.

[0041] In the aforementioned cylinder head assembly, since D1 > D2, the drive assembly 50 is further away from the reference line O than the first fastener 21. Therefore, the drive assembly 50 will not interfere with the first fastener 21, and thus there is no need to increase the height of the cylinder head cover 30 along the central axis S. This allows for better control of the height of the cylinder head cover 30 along the central axis S, enabling the miniaturization of the internal combustion engine. Furthermore, the drive assembly 50 will not encroach on the mating surface between the cylinder head cover 30 and the cylinder head 10, thereby ensuring the sealing between the cylinder head cover 30 and the cylinder head 10. In addition, the cylinder head cover 30 has a large installation space for the switching component 60, which is beneficial for the installation and arrangement of the switching component 60. If D1 < D2, the internal space of the cylinder head cover 30 would be reduced, which would be detrimental to the arrangement and installation of the switching component 60 within the cylinder head cover 30.

[0042] Please see Figure 2 For example, the cylinder head cover 30 is provided with a mounting hole 32, and the drive assembly 50 is provided with a drive part 55. The drive part 55 extends into the cylinder head cover 30 through the mounting hole 32 and cooperates with the switching member 60. Optionally, the drive assembly 50 includes a solenoid valve, which provides power to make the drive part 55 reciprocate. Of course, the drive assembly 50 can also use other power mechanisms, which are not particularly limited here. When the drive assembly 50 is working, it can drive the drive part 55 to move back and forth along the axial direction of the first rocker arm shaft, thereby driving the switching member 60 to move.

[0043] Based on the aforementioned embodiments, a boss 33 is provided on the outer wall of the cylinder head cover 30, a first mating surface 31 is disposed on the boss 33, and a mounting hole 32 penetrates the boss 33. In this way, the boss 33 can increase the thickness of a local portion of the cylinder head cover 30, thereby improving the installation stability of the drive assembly 50 and the sealing performance at the mounting hole 32. Furthermore, the wall thickness of the area of ​​the cylinder head cover 30 outside the boss 33 does not need to be increased; the thin-walled design reduces material costs.

[0044] It should be noted that the drive component 50 and the switching component 60 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 50 can be used to adjust the position of the switching component 60. The specific connection relationship between the drive component 50 and the switching component 60 is not particularly restricted here.

[0045] In some specific embodiments, the first intake rocker arm 41 is provided with a first mating hole, and the second intake rocker arm 42 is provided with a second mating hole. A switching member 60 passes through the first mating hole. Optionally, the switching member 60 includes a connecting pin, which passes through the first mating hole. The drive assembly 50 and the switching member 60 abut against each other along the axial direction of the first rocker arm shaft. When the first intake rocker arm 41 and the second intake rocker arm 42 abut against the base circle of the cam mechanism, i.e., the intake valve is in the closed state, the second mating hole and the first mating hole are aligned and connected along the axial direction of the first rocker arm. The drive assembly 50 can drive the switching member 60 to move along the axial direction of the first rocker arm shaft, causing the connecting pin to move from the second position to the first position, and the connecting pin enters the second mating hole. Thus, the first intake rocker arm 41 and the second intake rocker arm 42 are joined together by the connecting pin. Alternatively, the connecting pin can also move from the first position to the second position, thereby disconnecting the first intake rocker arm 41 and the second intake rocker arm 42, i.e., separating them.

[0046] To improve the positioning accuracy of the switching component 60, the switching component 60 also includes a reset component. The reset component is connected between the coupling pin and the first intake rocker arm 41. Specifically, when the drive assembly 50 pushes the coupling pin, the coupling pin enters the second mating hole, and the reset component undergoes elastic deformation; when the drive assembly 50 releases the coupling pin, the coupling pin will be reset from the second position to the first position under the action of the reset component.

[0047] Please see Figure 2 In some embodiments, the cylinder head assembly also includes an oil seal 70 fitted over the drive section 55. The mounting hole 32 has a third mating surface 321 on its wall, which abuts against the oil seal 70. This provides a sealing effect, preventing engine oil inside the cylinder head cover 30 from flowing out through the mounting hole 32.

[0048] The third mating surface 321 and the first mating surface 31 are located on opposite sides of the first fastener 21. This arrangement of the third mating surface 321 is reasonable, reducing the size of the cylinder head assembly along the direction of motion of the drive assembly 50, thus enabling the miniaturization of the internal combustion engine. Furthermore, it facilitates the machining of the top pin.

[0049] When both the third mating surface 321 and the first mating surface 31 are located on the side of the first fastener 21 closer to the reference line O, the height dimension of the cylinder head assembly along the central axis S will be larger. When both the third mating surface 321 and the first mating surface 31 are located on the side of the first fastener 21 farther from the reference line O, the first mating surface 31 will be farther from the reference line O, requiring the top pin to be lengthened, which in turn increases the processing difficulty. Furthermore, the dimensions of the cylinder head 10 and the cylinder head cover 30 along the direction of motion of the drive assembly 50 will increase, which in turn increases the volume of the internal combustion engine.

[0050] Please see Figure 2 and Figure 3 Based on the aforementioned embodiments, the drive assembly 50 includes a solenoid valve. The solenoid valve has a connecting sleeve 52, which extends into the mounting hole 32 and abuts against the side of the oil seal 70 away from the third mating surface 321. The outer wall of the connecting sleeve 52 is in a sealing fit with the wall of the mounting hole 32. Thus, the connecting sleeve 52 supports the solenoid valve, improving its installation stability on the cylinder head cover 30. Furthermore, the oil seal 70 is located between the connecting sleeve 52 and the third mating surface 321, and the outer wall of the connecting sleeve 52 is in a sealing fit with the wall of the mounting hole 32, thus providing good sealing performance.

[0051] Based on the foregoing embodiments, the drive assembly 50 further includes a sealing ring 53. The sealing ring 53 is sleeved on the outside of the connecting sleeve 52 and abuts against the wall of the mounting hole 32.

[0052] Please see Figure 3 In some embodiments, the first intake rocker arm 41 is provided with a valve pusher portion 411. The valve pusher portion 411 abuts against the top end of the intake valve. The top end of the intake valve is the end of the intake valve that is away from the combustion chamber. Driven by the cam mechanism, the first intake rocker arm 41 periodically abuts against the intake valve through the valve pusher portion 411 to fully open the intake port; when the valve pusher portion 411 of the first intake rocker arm 41 releases the intake valve, the intake valve resets and the intake port is closed.

[0053] Please refer to Figure 3Along the direction of reference line O, the valve pusher 411 is positioned between the first fastener 21 and the rotation axis Z of the drive assembly 50. That is, along the direction of reference line O, the drive assembly 50 is arranged on the side of the valve pusher 411 away from the first fastener 21. Thus, the drive assembly 50 is closer to the cam mechanism than the first fastener 21, allowing the positions of the first fastener 21 and the drive assembly 50 to be staggered along the direction of reference line O, providing sufficient space for disassembly and assembly, facilitating assembly. Furthermore, the arrangement of the drive assembly 50 on the cylinder head cover 30 is more reasonable, contributing to the miniaturization and weight reduction of the cylinder head cover 30. When both the drive assembly 50 and the first fastener 21 are arranged on the same side of the valve pusher 411 along the direction of reference line O, the volume of the cylinder head cover 30 near the first fastener 21 needs to be increased to accommodate the drive assembly 50, which not only interferes with the first fastener 21 but also hinders miniaturization and weight reduction.

[0054] Based on the aforementioned embodiments, since the drive assembly 50 is positioned reasonably on the cylinder head cover 30, it can be aligned with the switching member 60 along the rotation axis Z. This eliminates the need for an additional actuation transmission mechanism between the drive assembly 50 and the switching member 60, resulting in a short actuation transmission path and fast response between them, enabling precise control and adjustment of the position of the switching member 60. Specifically, the drive assembly 50 and the switching member 60 abut against each other along the rotation axis Z.

[0055] It is understandable that when both the drive assembly 50 and the first fastener 21 are arranged on the side of the valve pusher 411 away from the cam mechanism, an actuation transmission mechanism needs to be added between the drive assembly 50 and the switching member 60, which complicates the overall structure and lengthens the actuation transmission path. As a result, the position of the switching member 60 cannot be accurately adjusted and controlled.

[0056] For example, the drive assembly 50 is connected to the outer wall of at least one of the cylinder head 10 and the cylinder head cover 30. At least one of the cylinder head 10 and the cylinder head cover 30 serves to mount and support the drive assembly 50, thereby ensuring the stability of the drive assembly 50. When the drive assembly 50 is mounted on the outer wall of the cylinder head 10, since the wall thickness of the cylinder head 10 is greater than the wall thickness of the cylinder head cover 30, the installation stability is better than if the drive assembly 50 were completely mounted on the cylinder head cover 30.

[0057] Please see Figure 4In some embodiments, the drive assembly 50 is provided with a first mounting portion 54. The first mounting portion 54 is fixedly mounted to the cylinder head 10. The cylinder head assembly also includes a third fastener 23, which includes, but is not limited to, bolts, pins, screws, or rivets. The first mounting portion 54 is mounted to the outer wall of the cylinder head 10 via the third fastener 23. In the direction of the central axis S of the cylinder head 10, the connection position between the drive assembly 50 and the cylinder head 10 is located below the mating surface between the cylinder head 10 and the cylinder head cover 30. Specifically, the outer wall of the cylinder head 10 is provided with a mounting surface, and the first mounting portion 54 is fixed to the mounting surface via the third fastener 23. In the direction of the central axis S of the cylinder head 10, the mounting surface is located below the mating surface between the cylinder head 10 and the cylinder head cover 30. In this way, the size of the cylinder head assembly in the direction of the central axis S can be reduced, achieving a miniaturized design.

[0058] Please see Figure 4 Based on the aforementioned embodiments, the drive assembly 50 further includes a second mounting portion 56. The second mounting portion 56 is fixedly mounted to the cylinder head cover 30. Thus, the drive assembly 50 is not only mounted to the cylinder head 10 via the first mounting portion 54 and supported by the cylinder head 10, but also fixedly mounted to the cylinder head cover 30 via the second mounting portion 56, with the cylinder head cover 30 providing support and load-bearing capacity. Therefore, the installation is stable and reliable. Specifically, the second mounting portion 56 is fixed to the cylinder head cover 30 by a fourth fastener 24. The fourth fastener 24 includes, but is not limited to, bolts, screws, pins, or rivets.

[0059] Please see Figures 1 to 4 In some embodiments, the internal combustion engine of this application may specifically be a variable valve lift internal combustion engine.

[0060] For example, the internal combustion engine includes the cylinder head assembly of any of the foregoing embodiments.

[0061] 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.

[0062] For example, the internal combustion engine also includes a cylinder block. The cylinder head 10 is connected to the cylinder block.

[0063] Please see Figures 1 to 4 For example, an internal combustion engine also includes a crankshaft and a crankcase. The crankshaft is mounted inside the crankcase. The cylinder block is fixedly connected to the crankcase. A piston and piston pin are located inside the cylinder block; the piston pin is connected to the piston and also connected to the crankshaft via a connecting rod. When the internal combustion engine is working, the kinetic energy generated by combustion in the combustion chamber drives the piston to move. The piston reciprocates axially inside the cylinder block, driving the crankshaft to move. The crankshaft not only delivers power but also drives the cam mechanism to rotate.

[0064] Please see Figures 1 to 4In some embodiments, this application also provides a vehicle, which includes, but is not limited to, automobiles, buses, motorcycles, etc., and is not limited thereto. The vehicle includes a body and an internal combustion engine, with the internal combustion engine mounted on the body.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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: Cylinder head; First fastener; A cylinder head cover is connected to the cylinder head via a first fastener. The outer wall of the cylinder head cover has a first mating surface. The first mating surface and the first fastener are located on the same side of the cylinder head cover. A straight line passing through the center of the cylinder head assembly and parallel to the first mating surface is set as a reference line. The reference line is also perpendicular to the arrangement direction of the cylinder head cover and the cylinder head. The distance between the first mating surface and the reference line is greater than the distance between the first fastener and the reference line. A driving component and a switching component are provided. The driving component cooperates with the switching component. The driving component is used to drive the switching component to move. The driving component is provided with a second mating surface, which abuts against the first mating surface.

2. The cylinder head assembly according to claim 1, characterized in that, The cylinder head cover is provided with a mounting hole, and the drive assembly is provided with a drive part. The drive part extends into the cylinder head cover through the mounting hole and cooperates with the switching component.

3. The cylinder head assembly according to claim 2, characterized in that, The cylinder head cover has a boss on its outer wall, the first mating surface is disposed on the boss, and the mounting hole penetrates the boss; and / or The cylinder head assembly also includes an oil seal sleeved outside the drive unit. The wall of the mounting hole is provided with a third mating surface, which abuts against the oil seal. The third mating surface and the first mating surface are respectively located on opposite sides of the first fastener.

4. The cylinder head assembly according to claim 3, characterized in that, The drive assembly includes a solenoid valve; the solenoid valve is provided with a connecting sleeve, the connecting sleeve extends into the mounting hole and abuts against the side of the oil seal away from the third mating surface, and the outer wall of the connecting sleeve is sealed to the wall of the mounting hole.

5. The cylinder head assembly according to claim 4, characterized in that, The drive assembly also includes a sealing ring, which is sleeved on the outside of the connecting sleeve and seals against the wall of the mounting hole.

6. The cylinder head assembly according to claim 1, characterized in that, The cylinder head assembly further includes a valve train assembly, which is installed inside the cylinder head. The valve train assembly includes a first rocker arm shaft, a first intake rocker arm, and a second intake rocker arm. The first rocker arm shaft is installed in the cylinder head, and the first and second intake rocker arms are rotatably installed on the first rocker arm shaft. The first intake rocker arm is provided with a valve pusher. Along the direction of the reference line, the valve pusher is disposed between the first fastener and the rotation axis of the drive assembly.

7. The cylinder head assembly according to claim 6, characterized in that, The first intake rocker arm is provided with a first docking hole, and the second intake rocker arm is provided with a second docking hole; the switching component passes through the first docking hole; the drive assembly abuts against the switching component along the rotation axis.

8. The cylinder head assembly according to claim 1, characterized in that, The drive assembly is provided with a first mounting part and a second mounting part; the first mounting part is fixedly mounted on the outer wall of the cylinder head; the second mounting part is fixedly mounted on the outer wall of 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 also includes a cylinder block, wherein the cylinder head is connected to the cylinder block.

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

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