Engine valve drive device and vehicle

Abstract

The present application relates to an engine valve drive device and a vehicle, wherein the engine valve drive device includes a rocker arm capable of rotating around a rocker arm shaft, a transmission unit, a clutch unit, a drive member and a control unit. The rocker arm includes a first mounting portion and a second mounting portion arranged opposite to each other, the valve is arranged in the first mounting portion, and the transmission unit and the clutch unit are arranged in the second mounting portion. The drive member is used to drive the transmission unit to move relative to the second mounting portion. The clutch unit includes an engaged position and a disengaged position, and the control unit is used to control the clutch unit to switch between the disengaged position and the engaged position. When the clutch unit is in the engaged position, the drive member can drive the rocker arm to swing around the rocker arm shaft and drive the valve to achieve engine cylinder deactivation, which can effectively reduce fuel consumption. The structure is simple, which can reduce the manufacturing cost of the vehicle and free up space.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an engine valve driving device and a vehicle. Background Art

[0002] When the engine is running at no-load or low-load conditions, the fuel economy is poor. Without affecting the engine power output, the engine fuel economy can be improved through cylinder deactivation technology.

[0003] Cylinder deactivation is one of the technologies used to change engine displacement. When the engine is operating at partial load, it uses relevant mechanisms and strategies to control or cut off the fuel supply, ignition, and intake and exhaust of some cylinders, thereby stopping their operation. This increases the load rate of the remaining cylinders, allowing the engine to operate in the fuel economy zone. This can significantly reduce the engine's fuel consumption, thereby improving fuel economy. Cylinder deactivation also reduces heat transfer losses, improves cycle thermal efficiency, and reduces fuel consumption. Furthermore, cylinder deactivation reduces the energy required to actuate the intake and exhaust valves and reduces pumping losses, further reducing fuel consumption.

[0004] In the related art, the structure for realizing cylinder deactivation is relatively complex and can only stop oil or gas, which cannot effectively reduce the fuel consumption rate. Summary of the Invention

[0005] Based on this, the present application provides an engine valve drive device and a vehicle that can reduce the manufacturing cost of the vehicle, free up usage space and reduce fuel consumption.

[0006] On the one hand, the present application provides an engine valve driving device, which includes an engine valve driving device including a rocker arm capable of rotating around a rocker arm shaft, a transmission unit, a clutch unit, a driving member and a control unit; the rocker arm includes a first mounting portion and a second mounting portion arranged opposite to each other, the valve is arranged in the first mounting portion, and the transmission unit and the clutch unit are arranged in the second mounting portion; the driving member is used to drive the transmission unit to move relative to the second mounting portion; the clutch unit includes an engaged position and a disengaged position, and the control unit is used to control the clutch unit to switch between the disengaged position and the engaged position; when the clutch unit is in the engaged position, it can prevent the transmission unit from moving relative to the second mounting portion, and when the clutch unit is in the disengaged position, the transmission unit can move relative to the second mounting portion.

[0007] In one embodiment, the transmission unit includes a pivot shaft, a roller shaft, a roller, a slider and a first elastic member, the pivot shaft is connected to the second mounting portion, the roller shaft is rotatably connected to the pivot shaft and can swing around the pivot shaft, the roller is rotatably mounted on the periphery of the roller shaft, and the first elastic member abuts between the second mounting portion and the slider to bias the slider toward the roller shaft.

[0008] In one embodiment, the roller shaft includes a mounting section for rotationally connecting to the pivot shaft, an abutting section abutting against the slider, and a support section connected between the mounting section and the abutting section, the roller is rotatably mounted on the periphery of the support section, the center line of the pivot shaft is perpendicular to the center line of the roller shaft, the center line of the roller coincides with the center line of the roller shaft, the second mounting portion is provided with the mounting hole for accommodating the mounting section, and the inner diameter of the mounting hole is larger than the outer diameter of the mounting section.

[0009] In one embodiment, the second mounting portion is further provided with a first accommodating cavity and a second accommodating cavity connected to the first accommodating cavity, the roller, the abutting section and the supporting section are located in the first accommodating cavity, there is a gap between the inner wall of the first accommodating cavity and the abutting section and the roller, and the first elastic member and the slider are located in the second accommodating cavity.

[0010] In one embodiment, the slider has a mounting groove for accommodating the roller shaft and a limiting groove cooperating with the clutch unit. The mounting groove is an arc-shaped groove recessed upward from the bottom surface of the slider. The inner wall shape of the arc-shaped groove is adapted to the outer contour of the roller shaft, and the limiting groove passes through the slider toward the clutch unit.

[0011] In one embodiment, the second mounting portion further includes a third accommodating cavity for accommodating the clutch unit, the third accommodating cavity and the second accommodating cavity are communicated with each other, the clutch unit includes a clutch member, a second elastic member and a partition, the second elastic member abuts between the clutch member and the inner wall of the third accommodating cavity, the partition is arranged between the third accommodating cavity and the second accommodating cavity, the partition is provided with a penetrating connecting channel, the connecting channel connects the second accommodating cavity and the third accommodating cavity.

[0012] In one embodiment, the clutch member includes a limiting section, a protruding section extending from the limiting section toward a direction away from the clutch unit, and an extension section extending from the protruding section toward a defense line away from the clutch unit. The cross-sectional size of the protruding section is larger than the cross-sectional size of the extension section and the limiting section. The second elastic member is sleeved on the periphery of the extension section and abuts between the inner wall of the third accommodating cavity and the protruding section. The limiting section passes through the connecting channel and cooperates with the limiting groove.

[0013] In one embodiment, the protruding section divides the third accommodating chamber into a first chamber and a second chamber, the first chamber is farther away from the clutch unit than the second chamber, and the control unit includes a control channel, which is connected to the second chamber and is located between the protruding section and the partition.

[0014] In one embodiment, the driving member is configured as a cam structure, which includes a cam surface and a base circle surface, wherein the diameter of the cam surface is larger than the diameter of the base circle surface.

[0015] On the other hand, the present application provides a vehicle, which includes the above-mentioned engine valve driving device.

[0016] The present application provides a control unit to control the clutch unit to selectively prevent the transmission unit from moving relative to the second mounting part. When the transmission unit cannot move relative to the second mounting part, the movement of the driving member is transmitted to the rocker arm through the transmission unit, so that the rocker arm swings around the rocker arm shaft to drive the valve, thereby realizing engine cylinder shutdown, which can effectively reduce fuel consumption rate and has a simple structure, can reduce the manufacturing cost of the vehicle and free up the use space of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the combination of an engine valve drive device and a valve assembly according to an embodiment of the present application.

[0018] Figure 2 for Figure 1 A partial enlarged view of the clutch unit, wherein the clutch unit is in the engaged position.

[0019] Figure 3 for Figure 1 A partial enlarged view of the clutch unit, wherein the clutch unit is in the disengaged position.

[0020] Figure 4 A partial cross-sectional view of an engine valve driving device according to an embodiment of the present application.

[0021] Figure 5 for Figure 1 Cross-sectional view along the AA direction.

[0022] Figure 6A three-dimensional schematic diagram of a slider. DETAILED DESCRIPTION

[0023] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0024] Reference Figures 1 to 3 As shown, an engine valve drive device includes a rocker arm 1, a driver 2, a transmission unit 3, a clutch unit 4, and a control unit 5. The rocker arm 1 is capable of swinging about a rocker shaft 10. The rocker arm 1 includes a first mounting portion 11, a second mounting portion 12, and a third mounting portion 13 disposed between the first and second mounting portions 11 and 12, respectively. The valve assembly 8 is connected to the first mounting portion 11, and the transmission unit 3 and the clutch unit 4 are connected to the second mounting portion 12. The driver 2 is configured to contact the transmission unit 3 and transmit the motion of the driver 2 to the transmission unit 3. The clutch unit 4 selectively prevents the transmission unit 3 from moving relative to the second mounting portion 12. When the transmission unit 3 cannot move relative to the second mounting portion 12, the motion of the driver 2 is transmitted to the rocker arm 1 via the transmission unit 3, enabling the rocker arm 1 to swing about the rocker shaft 10 and drive the valve, thereby achieving engine cylinder deactivation. This can effectively reduce fuel consumption. The device has a simple structure and is easy to deploy.

[0025] Specifically, the clutch unit 4 has a disengaged position and an engaged position, and the control unit 5 controls the clutch unit 4 to switch between the disengaged and engaged positions. When the clutch unit 4 is in the engaged position, the clutch unit 4 can prevent the transmission unit 3 from moving relative to the second mounting portion 12, allowing the transmission unit 3 to transmit the movement of the driver 2 to the second mounting portion 12, causing the second mounting portion 12 to swing about the rocker arm shaft 10, thereby causing the first mounting portion 11 to swing and drive the valve. When the clutch unit 4 is in the disengaged position, the clutch unit 4 cannot prevent the transmission unit 3 from moving relative to the second mounting portion 12, so that the movement of the driver 2 cannot be transmitted to the second mounting portion 12, and the rocker arm 1 is stationary and cannot drive the valve.

[0026] In one embodiment, the control unit 5 is configured to control the clutch unit 4 to switch between a disengaged position and an engaged position. Specifically, when the control unit 5 switches the clutch unit 4 to the disengaged position, the clutch unit 4 and the transmission unit 3 are separated, and the movement of the driver 2 cannot be transmitted to the rocker arm 1, thereby preventing the valve from being actuated. When the control unit 5 switches the clutch unit 4 to the engaged position, the clutch unit 4 and the transmission unit 3 are locked, and the clutch unit 4 can prevent the transmission unit 3 from moving relative to the second mounting portion 12, thereby enabling the driver 2 to drive the rocker arm 1 to rotate about the rocker arm shaft 10, thereby actuating the valve.

[0027] In one embodiment, the driving member 2 is configured as a cam structure, which includes a cam surface 21 and a base circular surface 22 , wherein the diameter of the cam surface 21 is greater than the diameter of the base circular surface 22 .

[0028] Reference Figures 2 to 5 As shown, the transmission unit 3 includes a pivot shaft 31, a roller shaft 32, a roller 33, a slider 34 and a first elastic member 35. The pivot shaft 31 is connected to the second mounting portion 12. The roller shaft 32 is rotatably connected to the pivot shaft 31 and can swing around the pivot shaft 31. The roller 33 is rotatably mounted on the periphery of the roller shaft 32. The first elastic member 35 abuts between the second mounting portion 12 and the slider 34, and is used to bias the slider 34 toward the roller shaft 32, so that the slider 34 maintains contact with the roller shaft 32.

[0029] In one embodiment, the roller shaft 32 includes a mounting section 321 for rotationally connecting to the pivot shaft 31, an abutting section 323 that abuts the slider 34, and a support section 322 connected between the mounting section 321 and the abutting section 323. The roller 33 is rotatably mounted on the periphery of the support section 322. The centerline of the pivot shaft 31 is perpendicular to the centerline of the roller shaft 32, and the centerline of the roller 33 coincides with the centerline of the roller shaft 32. The mounting section 321 of the roller shaft 32 is hingedly connected to the second mounting portion 12 via the pivot shaft 31, and the abutting section 323 abuts the slider 34. The second mounting portion 12 is provided with a mounting hole 120 for accommodating the mounting section 321 of the roller shaft 32. The inner diameter of the mounting hole 120 is larger than the outer diameter of the mounting section 321, allowing the roller shaft 32 to swing about the pivot shaft 31.

[0030] by Figure 1 For reference, the direction parallel to the extension and contraction direction of the first elastic member 35 is defined as the first direction (up and down direction), and the side close to the driving member 2 is agreed to be the bottom and the side close to the first elastic member 35 is agreed to be the top.

[0031] The second mounting portion 12 further includes a first accommodating cavity 121 for partially accommodating the roller shaft 32 and roller 33, and a second accommodating cavity 122 for accommodating the first elastic member 35 and slider 34. The first accommodating cavity 121 and the second accommodating cavity 122 intersect and communicate with each other. The abutting section 323 and the supporting section 322 of the roller 33 and the roller shaft 32 are located within the first accommodating cavity 121. A gap exists between the inner wall of the first accommodating cavity 121 and the roller shaft 32 and roller 33, allowing the roller shaft 32 to swing about the pivot axis 31 within the first accommodating cavity 121. The first elastic member 35, slider 34, and roller shaft 32 are arranged in sequence in the vertical direction. The driving member 2 is located below the roller 33 and is in rotational contact with the roller 33. The first elastic member 35 abuts between the abutting section 323 of the slider 34 and the second mounting portion 12 . Under the elastic force of the first elastic member 35 , the slider 34 can maintain contact with the abutting section 323 of the roller shaft 32 , and the slider 34 can move along the extension and contraction direction of the first elastic member 35 .

[0032] When the control unit 5 switches the clutch unit 4 to the disengaged position, the clutch unit 4 and the slider 34 of the transmission unit 3 are disengaged. The movement of the driving member 2 drives the roller 33 to rotate about the roller shaft 32. Simultaneously, the driving member 2 presses upward against the roller 33, causing the roller 33 to swing upward about the pivot axis 31, thereby tilting the roller shaft 32 upward. The upward tilt of the roller shaft 32 drives the slider 34 upward. Due to the gap between the inner wall of the first accommodating chamber 121 and the roller shaft 32 and roller 33, the movement of the roller shaft 32 when it swings about the pivot axis 31 is only transmitted to the slider 34, causing the slider 34 to move relative to the second mounting portion 12. Therefore, the movement of the driving member 2 is not transmitted to the second mounting portion 12, and the movement of the driving unit cannot be transmitted to the rocker arm 1. The rocker arm 1 does not rotate about the rocker arm shaft 10, and thus cannot drive the valve.

[0033] When the control unit 5 switches the clutch unit 4 to the engaged position, the clutch unit 4 and the slider 34 of the transmission unit 3 are locked. The clutch unit 4 can prevent the slider 34 of the transmission unit 3 from moving relative to the second mounting portion 12, thereby enabling the driver 2 to drive the rocker arm 1 to rotate around the rocker arm shaft 10, thereby driving the valve. Specifically, the movement of the driver 2 drives the roller 33 to rotate around the roller shaft 32. At the same time, the driver 2 presses the roller 33 upward. Because the clutch unit 4 prevents the slider 34 of the transmission unit 3 from moving relative to the second mounting portion 12, when the driver 2 presses the roller 33 upward, the roller shaft 32 cannot swing upward. Therefore, the driver 2 rotates to drive the second mounting portion 12 to swing upward as a whole. The upward swing of the second mounting portion 12 drives the first mounting portion 11 to swing downward, thereby driving the valve.

[0034] Combine Figure 2 and Figure 6As shown, in one embodiment, the slider 34 has a mounting groove 341 for accommodating the roller shaft 32 and a limiting groove 342 that cooperates with the clutch unit 4. The mounting groove 341 is an arc-shaped groove that is recessed upward from the bottom surface of the slider 34. The inner wall shape of the arc-shaped groove is adapted to the outer contour of the roller shaft 32. The limiting groove 342 passes through the slider 34 toward the clutch unit 4.

[0035] Reference Figure 2 and Figure 3 As shown, in one embodiment, the second accommodating cavity 122 passes upward through the second mounting portion 12, and the transmission unit 3 also includes a limit block 36 arranged in the second accommodating cavity 122. The limit block 36 is connected to the second accommodating cavity 122 of the second mounting portion 12 by common fasteners such as bolts, and the first elastic member 35 abuts between the limit block 36 and the slider 34.

[0036] Continue to refer to Figure 2 and Figure 3 As shown, the second mounting portion 12 further includes a third accommodating cavity 123 for accommodating the clutch unit 4. The third accommodating cavity 123 intersects and communicates with the second accommodating cavity 122. The clutch unit 4 includes a clutch member 41, a second elastic member 42 abutting between the clutch member 41 and the inner wall of the third accommodating cavity 123 of the second mounting portion 12, and a partition 43 disposed between the third accommodating cavity 123 and the second accommodating cavity 122.

[0037] by Figure 2 For reference, the direction parallel to the expansion and contraction direction of the second elastic member 42 is defined as the second direction (left-right direction), and the side close to the first mounting portion 11 is designated as the left, and the side close to the second mounting portion 12 is designated as the right.

[0038] The clutch member 41 is capable of moving along the second direction. The clutch member 41 includes a limiting section 411, a protruding section 412 extending from the limiting section 411 toward a direction away from the clutch unit 4, and an extension section 413 extending from the protruding section 412 toward a defense line away from the clutch unit 4. The cross-sectional size of the protruding section 412 is larger than the cross-sectional size of the extension section 413 and the limiting section 411. The second elastic member 42 is sleeved on the outer periphery of the extension section 413 and abuts between the inner wall of the third accommodating cavity 123 and the protruding section 412. The partition 43 is provided with a penetrating connecting channel 431. The limiting section 411 passes through the connecting channel 431 of the partition 43 and cooperates with the limiting groove 342 of the slider 34 to prevent the slider 34 from moving upward.

[0039] The clutch member 41 includes a first end face 415 and a second end face 416 arranged opposite to each other in the second direction, wherein the second end face 416 is closer to the clutch unit 4 than the first end face 415. To ensure that the limiting section 411 and the limiting groove 342 can be disengaged, in the first direction, the distance between the inner wall of the third accommodating cavity 123 and the first end face 415 is greater than the distance between the second end face 416 and the partition 43, that is, in the first direction, the distance between the inner wall of the third accommodating cavity 123 and the first end face 415 is greater than the size of the right end face of the limiting section 411 protruding from the partition 43.

[0040] The protruding section 412 separates the third accommodating chamber 123 into a first chamber 1231 and a second chamber 1232. The first chamber 1231 is farther away from the clutch unit 4 than the second chamber 1232. The control unit 5 includes a control channel 51 and a control member (not shown). The control channel 51 is connected to the second chamber 1232 and is located between the protruding section 412 and the partition 43.

[0041] When the valve does not need to be driven, the control component inputs a driving medium into the control channel 51, and the driving medium enters the second chamber 1232 to form a control pressure. Under the action of the control pressure of the driving medium, the clutch component 41 can overcome the elastic force of the second elastic component 42 and move in the direction away from the clutch unit 4, so that the limiting section 411 of the clutch component 41 is disengaged from the limiting groove 342 of the transmission unit 3, thereby enabling the slider 34 to move upward to allow the roller shaft 32 to tilt without driving the second mounting portion 12 to move, and thus failing to drive the valve.

[0042] When the valve needs to be driven, the control member prevents the driving medium from being input into the control channel 51, and the driving medium is driven in the second chamber 1232, so that there is no control pressure in the second chamber 1232. The clutch member 41 moves toward the direction close to the transmission unit 3 under the elastic force of the second elastic member 42, so that the limiting section 411 of the clutch member 41 presses downward against the limiting groove 342 of the transmission unit 3 to prevent the slider 34 from moving upward, so that the driving member 2 can drive the rocker arm 1 to rotate around the rocker arm shaft 10, and then drive the valve.

[0043] In one embodiment, the valve drive device also includes a pressure relief channel 7, which connects the first chamber 1231 of the third accommodating chamber 123 with the external space. Specifically, one end of the pressure relief channel 7 is connected to the first chamber 1231 of the third accommodating chamber 123, and the other end is connected to the outside world, thereby avoiding air resistance in the first chamber 1231.

[0044] In one embodiment, the clutch member 41 is configured as a hollow structure, which can reduce the mass of the clutch member 41 and thereby improve the response speed of the valve rocker arm 1 driving device.

[0045] The working principle of the engine valve drive device of this application is as follows:

[0046] When it is necessary to stop driving the valve, the control component inputs the driving medium into the control channel 51, and the driving medium enters the second chamber 1232 to form a control pressure. When the roller 33 contacts the base circular surface 22 of the driving component 2, due to the valve clearance, the limiting section 411 of the clutch 41 is separated from the limiting groove 342 in the up and down directions. Under the action of the control pressure, the clutch 41 overcomes the elastic force of the second elastic component 42 and moves in the direction away from the slider 34. The limiting section 411 of the clutch 41 is disengaged from the limiting groove 342 of the slider 34, and the clutch unit 4 is in a separated state. The movement of the driving component 2 cannot drive the rocker arm 1 to swing, and thus cannot drive the valve.

[0047] As the driving member 2 continues to rotate, the profile lift of the driving member 2 is in a gradually increasing stage, the roller 33 gradually cooperates with the cam surface 21 of the driving member 2, and the roller shaft 32 is pushed upward by the cam surface 21 of the driving member 2 and swings upward. Since the clutch unit 4 is in the disengaged position at this time, the slider 34 can slide upward, and the driving member 2 cannot drive the rocker arm 1 to swing, and thus cannot drive the valve.

[0048] As the driving member 2 continues to rotate, the profile lift of the driving member 2 is in a stage of gradually decreasing, and the driving member 2 will not drive the roller shaft 32 to swing upward through the roller 33. The roller shaft 32 gradually swings downward, so that the slider 34 moves downward under the elastic force of the first elastic member 35 and gravity and keeps in contact with the roller shaft 32. At this time, the rocker arm 1 will not swing, and thus cannot drive the valve.

[0049] That is, when the clutch unit 4 is in the disengaged position, the valve cannot be driven as the driving member 2 rotates. At this time, the driving medium is stopped from being input into the control channel 51, the control pressure of the second chamber 1232 remains stable, the clutch unit 4 remains in the gift box position, the valve is not driven, and cylinder deactivation is achieved. The engine valve drive device of the present application can achieve cylinder deactivation without modifying the existing engine, and has a simple structure and is easy to deploy on the engine.

[0050] When the valve needs to be actuated, the control member blocks the input of the driving medium into the control channel 51. No driving medium is present in the second chamber 1232, and consequently, no control pressure exists in the second chamber 1232. The clutch member 41, under the elastic force of the second elastic member 42, moves toward the transmission unit 3, causing the limiting section 411 of the clutch member 41 to press downward against the limiting groove 342 of the transmission unit 3, preventing the slider 34 from moving upward. This allows the driver 2 to drive the rocker arm 1 to rotate about the rocker arm shaft 10, thereby actuating the valve.

[0051] The driving medium may be air or liquid. In one embodiment, the driving medium is compressed air of a vehicle or lubricating oil of an engine.

[0052] The present application also provides an automobile, which includes the above-mentioned valve rocker arm 1 driving device.

[0053] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0054] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0055] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0056] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0057] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, 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 embodiment.

[0058] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0059] The above-described embodiments merely represent several implementation methods of the present application. 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 a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An engine valve drive device, characterized in that: include: A rocker arm, capable of rotating around a rocker shaft, the rocker arm comprising a first mounting portion and a second mounting portion respectively located on either side of the rocker shaft, the valve being disposed on the first mounting portion; a transmission unit disposed within the second mounting portion and capable of moving relative to the second mounting portion; the transmission unit comprising a pivot shaft, a roller shaft, a roller, a slider, and a first elastic member; the pivot shaft being connected to the second mounting portion; the roller shaft being rotatably connected to the pivot shaft and capable of swinging about the pivot shaft; the roller being rotatably mounted on the periphery of the roller shaft; and the first elastic member being abutted between the second mounting portion and the slider for biasing the slider toward the roller shaft; a clutch unit disposed in the second mounting portion, the clutch unit comprising an engaged position and a disengaged position, wherein when the clutch unit is in the engaged position, the transmission unit is prevented from moving relative to the second mounting portion, and when the clutch unit is in the disengaged position, the transmission unit is able to move relative to the second mounting portion; a driving member, configured to drive the transmission unit to move relative to the second mounting portion; and A control unit is used to control the clutch unit to switch between the disengaged position and the engaged position.

2. The engine valve driving device according to claim 1, characterized in that: The roller shaft includes a mounting section for rotationally connecting to the pivot shaft, an abutting section abutting against the slider, and a supporting section connected between the mounting section and the abutting section. The roller is rotatably mounted on the periphery of the supporting section. The center line of the pivot shaft is perpendicular to the center line of the roller shaft. The center line of the roller coincides with the center line of the roller shaft. The second mounting portion is provided with a mounting hole for accommodating the mounting section. The inner diameter of the mounting hole is larger than the outer diameter of the mounting section.

3. The engine valve driving device according to claim 2, characterized in that: The second mounting portion is further provided with a first accommodating cavity and a second accommodating cavity connected to the first accommodating cavity. The roller, the abutting section and the supporting section are located in the first accommodating cavity. There is a gap between the inner wall of the first accommodating cavity and the abutting section and the roller. The first elastic member and the slider are located in the second accommodating cavity.

4. The engine valve driving device according to claim 3, characterized in that: The slider has a mounting groove for accommodating the roller shaft and a limiting groove cooperating with the clutch unit. The mounting groove is an arc-shaped groove recessed upward from the bottom surface of the slider. The inner wall shape of the arc-shaped groove is adapted to the outer contour of the roller shaft. The limiting groove passes through the slider toward the clutch unit.

5. The engine valve driving device according to claim 4, characterized in that: The second mounting portion also includes a third accommodating chamber for accommodating the clutch unit, and the third accommodating chamber is communicated with the second accommodating chamber. The clutch unit includes a clutch member, a second elastic member and a partition. The second elastic member abuts between the clutch member and the inner wall of the third accommodating chamber. The partition is arranged between the third accommodating chamber and the second accommodating chamber. The partition is provided with a connecting channel that penetrates the second accommodating chamber and the third accommodating chamber.

6. The engine valve driving device according to claim 5, characterized in that: The clutch member includes a limiting section, a protruding section extending from the limiting section toward a direction away from the clutch unit, and an extension section extending from the protruding section toward a defense line away from the clutch unit. The cross-sectional size of the protruding section is larger than the cross-sectional size of the extension section and the limiting section. The second elastic member is sleeved on the periphery of the extension section and abuts between the inner wall of the third accommodating cavity and the protruding section. The limiting section passes through the connecting channel and cooperates with the limiting groove.

7. The engine valve driving device according to claim 6, characterized in that: The protruding section divides the third accommodating chamber into a first chamber and a second chamber, the first chamber is farther away from the clutch unit than the second chamber, and the control unit includes a control channel, which is connected to the second chamber and is located between the protruding section and the partition.

8. The engine valve driving device according to claim 1, characterized in that: The driving member is configured as a cam structure, which includes a cam surface and a base circle surface, wherein the diameter of the cam surface is larger than the diameter of the base circle surface.

9. A vehicle comprising the engine valve driving device according to any one of claims 1 to 8.

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