Valve driving device and vehicle
By introducing rocker arms and adjustment components into the valve drive mechanism, the distance between the brake piston and the adjustment component is adjusted, solving the problem of difficult machining of spherical structures, realizing flexible adjustment of valve lift, and improving high-power braking effect and vehicle economy.
Patent Information
- Application Number
- CN202520631540.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-04-07
AI Technical Summary
The difficulty in machining the spherical structure in existing valve drive devices leads to high costs, affecting vehicle economy, and makes it difficult to meet the engine's adjustment requirements for valve lift.
The valve lift is adjusted by using a rocker arm and an adjustment assembly, including an adjustment element, an adjustment valve, a brake piston, and a reset element. The distance between the brake piston and the adjustment element is adjusted by the adjustment valve, and the reset element provides elastic force to achieve the adjustment of valve lift.
It enables flexible adjustment of valve lift, improves braking power of high-power braking, reduces exhaust gas temperature, and enhances vehicle economy.
Smart Images
Figure CN223825078U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle technology, and in particular to valve drive devices and vehicles. Background Technology
[0002] The valve rocker arm is an indispensable and important component of a car engine. It is mounted on the main shaft, and there is a certain angle of rotational clearance between the valve rocker arm and the main shaft. The rotational movement of the valve rocker arm is mainly used to adjust the valve clearance of the car engine. With the increasing additional requirements for engine emissions and engine braking, more and more engines need to add auxiliary valve movement on top of the conventional valve movement to increase the intake stroke and intake valve lift, increase the intake volume, and improve the braking power of the first compression release in high-power braking.
[0003] Existing technology already has a fixed-chain engine valve drive device, which uses an upper connecting rod and a lower connecting rod hinged together between an adjusting screw and a piston, and a return ball between the upper and lower connecting rods. By adjusting the position of the return ball, the angle between the upper and lower connecting rods is adjusted, thereby adjusting the distance between the adjusting screw and the piston, thus adjusting the valve lift. However, the upper connecting rod and adjusting screw are connected to the lower connecting rod and piston through a spherical structure. The spherical structure is difficult to manufacture, resulting in high manufacturing costs and affecting the vehicle's economy.
[0004] Therefore, a valve drive device and vehicle are needed to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a valve drive device and a vehicle. The valve drive device has a simple structure and can adjust the valve lift, thereby improving the braking power of high-power braking.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A valve drive device includes a rocker arm and an adjustment assembly. The rocker arm has a receiving cavity. The adjustment assembly includes an adjustment member, an adjustment valve, a brake piston, and a reset member. A first end of the adjustment member is located in the receiving cavity, and a second end of the adjustment member slides through the cavity wall on one side of the receiving cavity. A first end of the brake piston is located in the receiving cavity, and a second end of the brake piston slides through the cavity wall on the opposite side of the receiving cavity. The adjustment valve is slidably disposed on the rocker arm and can abut against the first end of the brake piston and the first end of the adjustment member, thereby adjusting the distance between the brake piston and the adjustment member. The reset member is elastically disposed between the inner wall of the receiving cavity and the adjustment valve to provide an elastic force that moves the adjustment valve away from the adjustment member and the brake piston.
[0008] As an optional technical solution, the regulating valve is provided with a first recess and a second recess, the regulating member is provided with a first protrusion, and the brake piston is provided with a second protrusion. The first protrusion can be inserted and engaged with the first recess, and the second protrusion can be inserted and engaged with the second recess.
[0009] As an optional technical solution, the first recess includes a first inclined surface, the adjusting member has a third inclined surface, the third inclined surface being able to slide along the first inclined surface; and / or, the second recess includes a second inclined surface, the first end of the brake piston has a fourth inclined surface, the fourth inclined surface being able to slide along the second inclined surface.
[0010] As an optional technical solution, the first recess further includes a first plane connected to the first inclined surface; the adjusting member has a second plane connected to the third inclined surface; when the first inclined surface and the third inclined surface are in complete contact, the first plane and the second plane are in contact; and / or, the second recess further includes a third plane connected to the second inclined surface; the brake piston has a fourth plane connected to the fourth inclined surface; when the second inclined surface and the fourth inclined surface are in complete contact, the third plane and the fourth plane are in contact.
[0011] As an optional technical solution, the first recess further includes a fifth inclined surface, which is connected to the end of the first plane away from the first inclined surface, and the fifth inclined surface is used to limit the adjustment member; and / or, the second recess further includes a sixth inclined surface, which is connected to the end of the third plane away from the second inclined surface, and the sixth inclined surface is used to limit the brake piston.
[0012] As an optional technical solution, the valve drive device further includes a piston body, which is disposed in the receiving cavity. The piston body has a piston chamber and a slide, which are connected to the piston chamber. The first end of the adjusting member and the first end of the brake piston are both located in the piston chamber. The slide is disposed through the side wall of the piston body, and the adjusting valve is slidably disposed in the slide.
[0013] As an optional technical solution, the adjusting member includes a connected stud and a first adjusting part, the first adjusting part being disposed in the piston cavity, the rocker arm having a first through hole, the portion of the stud extending out of the piston cavity being slidably disposed in the first through hole, and the peripheral wall of the piston cavity having a first retaining ring, the first retaining ring being able to abut against the end of the first adjusting part away from the brake piston; and / or, the brake piston includes a connected piston rod and a second adjusting part, the second adjusting part being disposed in the piston cavity, the rocker arm having a third through hole, the portion of the piston rod extending out of the piston cavity being slidably disposed in the third through hole, and the peripheral wall of the piston cavity having a second retaining ring, the second retaining ring being able to abut against the end of the second adjusting part away from the adjusting member.
[0014] As an optional technical solution, the rocker arm is also provided with an oil passage, which is connected to the slide rail.
[0015] As an optional technical solution, the reset element is a spring, and a blind hole is provided on the side of the regulating valve away from the slide. The first end of the spring abuts against the inner wall of the piston chamber, and the second end of the spring abuts against the bottom wall of the blind hole.
[0016] This utility model also adopts the following technical solution:
[0017] A vehicle, the vehicle including valves, the vehicle further including a valve actuation device as described above, the valve abutting against the brake piston of the valve actuation device.
[0018] The beneficial effects of this utility model are:
[0019] This utility model discloses a valve driving device, which includes a rocker arm and an adjusting assembly. The rocker arm is provided with a receiving cavity. The adjusting assembly includes an adjusting member, an adjusting valve, a braking piston, and a resetting member. The adjusting member and the braking piston are slidably disposed at both ends of the rocker arm. The adjusting valve is disposed between the adjusting member and the braking piston, and both ends of the adjusting valve can abut against the adjusting member and the braking piston. During the sliding process of the adjusting valve along the rocker arm, the distance between the braking piston and the adjusting member can be adjusted, thereby adjusting the lift of the valve abutting against the braking piston. The resetting member is used to reset the adjusting valve to ensure the performance of the adjusting valve. This valve drive device, equipped with a regulating valve, can adjust the distance between the brake piston and the regulating component as the regulating valve slides along the rocker arm. This, in turn, adjusts the lift of the valve that abuts against the brake piston, thereby increasing the intake volume of the valve during the intake stroke. This enhances the braking power of the first compression release during high-power braking. Furthermore, in practical use, in conjunction with a specially designed intake cam profile, the valve reopens during the power stroke, allowing fresh air to enter the cylinder. This increases the proportion of fresh air in the second compression release during high-power braking, reduces the heat load of the second compression release, and thus lowers the exhaust gas temperature.
[0020] This utility model also discloses a vehicle, which includes valves and the aforementioned valve drive device, with the valves abutting against the brake piston of the valve drive device. The valves of this vehicle are driven by the aforementioned valve drive device. During high-power braking, this increases the intake stroke valve lift, increases the intake volume, and enhances the braking power of the first compression release during high-power braking. In practical use, this valve drive device, in conjunction with a specially designed intake cam profile, allows the valves to open again during the power stroke, allowing fresh air to enter the cylinder. This increases the proportion of fresh air in the second compression release during high-power braking, reduces the heat load of the second compression release, and improves the vehicle's fuel economy. Attached Figure Description
[0021] Figure 1 This is a partial structural schematic diagram of the valve drive device according to an embodiment of the present utility model;
[0022] Figure 2 This is a partially exploded view of the valve drive device according to an embodiment of the present invention;
[0023] Figure 3 This is a cross-sectional view of the valve drive device in a free state according to an embodiment of the present utility model;
[0024] Figure 4 This is a cross-sectional view of the valve drive device of this utility model embodiment in the state of minimum valve lift;
[0025] Figure 5 This is a cross-sectional view of the valve drive device of this utility model embodiment in the state of maximum valve lift;
[0026] Figure 6 This is a cross-sectional view of the valve drive device in a transitional state according to an embodiment of the present utility model;
[0027] Figure 7 yes Figure 6 A magnified view of part A in the image;
[0028] Figure 8 This is a curve showing the corresponding crankshaft angle and intake valve lift when the valve drive device of this utility model is actually applied.
[0029] In the picture:
[0030] 10. Rocker arm; 11. Receiving cavity; 12. Oil passage;
[0031] 20. Piston body; 21. Piston chamber; 22. Slide rail;
[0032] 30. Adjusting assembly; 31. Adjusting component; 311. First protrusion; 3112. Third inclined surface; 3113. Second plane; 32. Adjusting valve; 321. First recess; 3211. First inclined surface; 3212. First plane; 3213. Fifth inclined surface; 322. Second recess; 3221. Second inclined surface; 3222. Third plane; 3223. Sixth inclined surface; 33. Brake piston; 331. Second protrusion; 3311. Fourth inclined surface; 3312. Fourth plane; 34. Reset component;
[0033] 40. First stop ring;
[0034] 50. Second stop ring;
[0035] 60. Rivet; 61. Process hole. Detailed Implementation
[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0040] like Figures 1 to 7 As shown, this embodiment provides a valve drive device, which includes a rocker arm 10 and an adjustment assembly 30. The rocker arm 10 is provided with a receiving cavity 11. The adjustment assembly 30 includes an adjustment member 31, an adjustment valve 32, a brake piston 33, and a reset member 34. The first end of the adjustment member 31 is located in the receiving cavity 11, and the second end of the adjustment member 31 slides through the cavity wall on one side of the receiving cavity 11. The first end of the brake piston 33 is located in the receiving cavity 11, and the second end of the brake piston 33 slides through the cavity wall on the opposite side of the receiving cavity 11. The adjustment valve 32 is slidably disposed in a slide rail 22. The adjustment valve 32 can abut against the first end of the brake piston 33 and the first end of the adjustment member 31 respectively, thereby adjusting the distance between the brake piston 33 and the adjustment member 31. The reset member 34 is elastically disposed between the inner wall of the receiving cavity 11 and the adjustment valve 32, and is used to provide an elastic force to move the adjustment valve 32 away from the adjustment member 31 and the brake piston 33.
[0041] Specifically, in this embodiment, the first end of the adjusting member 31 is located in the receiving cavity 11, and the second end of the adjusting member 31 extends from one end of the rocker arm 10. The first end of the brake piston 33 is also located in the receiving cavity 11, and the second end of the brake piston 33 extends from the other end of the rocker arm 10 for contacting the valve. In this embodiment, the adjusting member 31 and the brake piston 33 are coaxially arranged to improve stability during use. The regulating valve 32 is slidably disposed on the side wall of the rocker arm 10. The regulating valve 32 is located between the brake piston 33 and the adjusting member 31, and the regulating valve 32 can respectively contact the brake piston 33 and the valve. One end of piston 33 abuts against one end of adjusting member 31. During the radial sliding of adjusting valve 32 relative to the receiving cavity 11 of rocker arm 10, the distance between braking piston 33 and adjusting member 31 changes, thereby achieving the purpose of adjusting valve lift. Reset member 34 can provide elastic force to move adjusting valve 32 away from adjusting member 31 and braking piston 33, for resetting adjusting valve 32, so that the position of adjusting valve 32 is in the initial position to meet the adjustment of valve lift next time, ensuring the performance of adjusting valve 32 and avoiding adjustment failure.
[0042] Specifically, in this embodiment, the adjusting element 31 is an adjusting bolt.
[0043] Furthermore, the valve drive device also includes a piston body 20, which is disposed in the receiving cavity 11. The piston body 20 has a piston chamber 21 and a slide 22, which are connected to the piston chamber 21. The first end of the adjusting member 31 and the first end of the brake piston 33 are both located in the piston chamber 21. The slide 22 is disposed through the side wall of the piston body 20, and the adjusting valve 32 is slidably disposed in the slide 22.
[0044] Specifically, in this embodiment, the receiving cavity 11 provided on the piston body 20 and the rocker arm 10 is interference-fitted to improve stability during use. The piston body 20 is provided with a piston cavity 21 and a slide 22. The extension direction of the piston cavity 21 is parallel to the axial direction of the adjusting member 31. The slide 22 extends radially along the piston cavity 21. The first end of the adjusting member 31 is located in the piston cavity 21. The second end of the adjusting member 31 slides through one end of the piston body 20 and one end of the rocker arm 10 in sequence. The first end of the brake piston 33 is located in the piston cavity 21, and the second end of the brake piston 33 slides through the other end of the piston body 20 and the other end of the rocker arm 10 in sequence to abut against the valve. The regulating valve 32 is slidably disposed in the slide 22. When the regulating valve 32 slides along the slide 22, the distance between the brake piston 33 and the adjusting member 31 changes, thereby achieving the purpose of adjusting the valve lift. By providing the piston body 20, and by ensuring an interference fit between the piston body 20 and the inner wall of the receiving cavity 11, a good seal is achieved between the piston body 20 and the inner wall of the receiving cavity 11, reducing the leakage of pressurized oil. Furthermore, the piston cavity 21 of the piston body 20 provides a good limiting effect for the first end of the adjusting member 31 and the first end of the brake piston 33, and facilitates the installation of the adjusting member 31 and the brake piston 33, thereby improving stability during use. Additionally, the slide 22 provides good guiding performance for the regulating valve 32, thus ensuring the stability of valve lift adjustment.
[0045] Specifically, such as Figure 8 As shown, in actual use, after the driver issues a braking command, the brake solenoid valve opens, and the regulating valve 32 moves, making the distance between the brake piston 33 and the regulating member 31 the maximum. At this time, the valve lift is also the maximum. When the valve opens, the intake volume increases, which effectively increases the power of the first compression release. In addition, the valve drive device in this embodiment, in conjunction with the specially designed intake cam profile, allows the intake valve to be opened again during the engine's power stroke, allowing fresh air to enter the cylinder and reducing the exhaust temperature of the second compression release of high-power braking, thereby effectively reducing the exhaust gas temperature. It has the same technical effect in the starting state, which will not be elaborated here.
[0046] Specifically, in this embodiment, the receiving cavity 11 is provided with an opening, through which the piston body 20 is installed into the receiving cavity 11.
[0047] Furthermore, such as Figure 6 and Figure 7As shown, the regulating valve 32 is provided with a first recess 321 and a second recess 322, the adjusting member 31 is provided with a first protrusion 311, and the brake piston 33 is provided with a second protrusion 331. The first protrusion 311 can be inserted and engaged with the first recess 321, and the second protrusion 331 can be inserted and engaged with the second recess 322. Specifically, in this embodiment, this arrangement can ensure that the positions of the regulating valve 32, the adjusting member 31, and the brake piston 33 are fixed during the intake process, thereby ensuring good stability during valve opening and closing and improving performance.
[0048] Furthermore, such as Figure 6 and Figure 7 As shown, the first recess 321 includes a first inclined surface 3211, the adjusting member 31 has a third inclined surface 3112, the third inclined surface 3112 is slidable along the first inclined surface 3211; and / or, the second recess 322 includes a second inclined surface 3221, the first end of the brake piston 33 has a fourth inclined surface 3311, the fourth inclined surface 3311 is slidable along the second inclined surface 3221. Specifically, in this embodiment, the first recess 321 includes a first inclined surface 3211, and the adjusting member 31 has a third inclined surface 3112. The third inclined surface 3112 can slide along the first inclined surface 3211. This arrangement allows the adjusting member 31 and the adjusting valve 32 to have surface contact, ensuring good stability during the relative movement of the adjusting member 31 and the adjusting valve 32, and ensuring their performance. Furthermore, the second recess 322 includes a second inclined surface 3221, and the first end of the brake piston 33 has a fourth inclined surface 3311. The fourth inclined surface 3311 can slide along the second inclined surface 3221, allowing the brake piston 33 and the adjusting valve 32 to also have surface contact, ensuring good stability during the relative movement of the brake piston 33 and the adjusting valve 32, and ensuring their performance. Moreover, this arrangement makes the distance between the adjusting member 31 and the brake piston 33 infinitely variable, thereby effectively avoiding large changes in valve lift and improving stability during use.
[0049] Specifically, in another embodiment, the first recess 321 includes a first arc-shaped surface, the adjusting member 31 is provided with a second arc-shaped surface, the first arc-shaped surface and the second arc-shaped surface are configured to cooperate, the second recess 322 includes a third arc-shaped surface, the brake piston 33 is provided with a fourth arc-shaped surface, the third arc-shaped surface and the fourth arc-shaped surface are configured to cooperate, which can also achieve the purpose of adjusting the distance between the adjusting member 31 and the brake piston 33. However, since the arc-shaped surface is difficult to process, an inclined surface is used in this embodiment.
[0050] Furthermore, such as Figure 6 and Figure 7As shown, the first recess 321 further includes a first plane 3212 connected to the first inclined plane 3211. The adjusting member 31 has a second plane 3113 connected to the third inclined plane 3112. When the first inclined plane 3211 and the third inclined plane 3112 are fully abutted, the first plane 3212 and the second plane 3113 abut against each other. And / or, the second recess 322 further includes a third plane 3222 connected to the second inclined plane 3221. The brake piston 33 has a fourth plane 3312 connected to the fourth inclined plane 3311. When the second inclined plane 3221 and the fourth inclined plane 3311 are fully abutted, the third plane 3222 and the fourth plane 3312 abut against each other. Specifically, in this embodiment, as shown... Figure 3 As shown, when the valve drive device is in a free state, the regulating valve 32 is located at the bottom of the slide 22 under the action of the reset member 34, and the brake piston 33 moves away from the regulating valve 32 under the action of gravity; as Figure 4 As shown, when the valve drive device is working and the valve lift is at its minimum, the second plane 3113 of the adjusting member 31 and the first plane 3212 of the first recess 321 abut against each other, ensuring a large contact area between the adjusting member 31 and the regulating valve 32, thereby making the connection between the adjusting member 31 and the regulating valve 32 more stable and improving performance; at the same time, the fourth plane 3312 of the brake piston 33 and the third plane 3222 of the second recess 322 abut against each other, ensuring a large contact area between the brake piston 33 and the regulating valve 32, thereby making the connection between the brake piston 33 and the regulating valve 32 more stable, thus ensuring stability during valve opening and closing; as Figure 5 As shown, when the valve drive device is working and the valve lift is at its maximum, the first inclined surface 3211 of the regulating valve 32 and the third inclined surface 3112 of the regulating member 31 separate, the second plane 3113 of the regulating member 31 abuts against the outermost periphery of the regulating valve 32, and at the same time, the second inclined surface 3221 of the regulating valve 32 and the fourth inclined surface 3311 of the brake piston 33 separate, and the third plane 3222 of the brake piston 33 abuts against the outermost periphery of the regulating valve 32.
[0051] Furthermore, such as Figure 6 and Figure 7As shown, the first recess 321 further includes a fifth inclined surface 3213, which is connected to the end of the first plane 3212 away from the first inclined surface 3211. The fifth inclined surface 3213 is used to limit the adjustment member 31; and / or, the second recess 322 further includes a sixth inclined surface 3223, which is connected to the end of the third plane 3222 away from the second inclined surface 3221. The sixth inclined surface 3223 is used to limit the brake piston 33. Specifically, in this embodiment, the fifth inclined surface 3213 and the sixth inclined surface 3223 provided on the regulating valve 32 can limit the adjustment member 31 and the brake piston 33, thereby ensuring that the adjustment member 31 will not cross the fifth inclined surface 3213 and the brake piston 33 will not cross the sixth inclined surface 3223, thereby improving safety during use.
[0052] Furthermore, the adjusting member 31 includes a connected stud and a first adjusting part, the first adjusting part being disposed in the piston cavity 21, the rocker arm 10 having a first through hole, the portion of the stud extending out of the piston cavity 21 being slidably disposed in the first through hole, the peripheral wall of the piston cavity 21 having a first retaining ring 40, the first retaining ring 40 being able to abut against the end of the first adjusting part away from the brake piston 33; and / or, the brake piston 33 includes a connected piston rod and a second adjusting part, the second adjusting part being disposed in the piston cavity 21, the rocker arm 10 having a third through hole, the portion of the piston rod extending out of the piston cavity 21 being slidably disposed in the second through hole, the peripheral wall of the piston cavity 21 having a second retaining ring 50, the second retaining ring 50 being able to abut against the end of the second adjusting part away from the adjusting member 31.
[0053] Specifically, in this embodiment, the stud is slidably disposed in the first through hole, and the part of the stud extending out of the first through hole is threadedly connected to the nut. The nut is limited by the corresponding feature on the outside of the rocker arm 10, thereby limiting the stud and ensuring the stability of the adjusting member 31 during use. A first groove is provided on the peripheral wall of the piston cavity 21 at one end of the piston body 20. The first retaining ring 40 is engaged in the first groove, and the stud slidably passes through the first retaining ring 40. The first retaining ring 40 can abut against the end face of the first adjusting part away from the brake piston 33 to limit the first adjusting part, so that the first adjusting part is limited in the piston cavity 21 by the first retaining ring 40. This limiting method has a relatively simple structure and is easy to assemble and disassemble. The first adjustment part is convenient and has a good limiting effect, which can ensure that the first adjustment part is always located in the piston cavity 21, improving the stability during use. Similarly, the piston rod is slidably disposed in the second through hole, and the part of the piston rod extending out of the second through hole is used to abut against the valve. The piston cavity 21 at the other end of the piston body 20 is provided with a second groove, and the second retaining ring 50 is engaged in the second groove. The piston rod slides through the second retaining ring 50, and the second retaining ring 50 can abut against the end face of the second adjustment part away from the adjustment member 31 to limit the second adjustment part. The second adjustment part is limited to the piston cavity 21 by the second retaining ring 50. This limiting method has a simple structure, is easy to disassemble and assemble, has a good limiting effect, and saves space.
[0054] Preferably, the first adjusting part and the peripheral wall of the piston chamber 21 are fitted with a small clearance, thereby improving the stability during use and ensuring the stability during valve opening and closing.
[0055] Specifically, in this embodiment, the second through hole is the opening made on the rocker arm for mounting the piston body 20; in other embodiments, a sealing member with a second through hole can be used to seal the opening, and the piston rod is slidably disposed in the second through hole, which will not be elaborated here.
[0056] Furthermore, the rocker arm 10 is also provided with an oil passage 12, which is connected to the slide rail 22. Specifically, in this embodiment, the oil passage 12 on the rocker arm 10 and the slide rail 22 are connected. After the driver issues a braking command, the brake solenoid valve opens, and pressurized oil enters the slide rail 22 through the oil passage 12 on the rocker arm 10. This pushes the regulating valve 32 to slide along the slide rail 22, thereby causing the first inclined surface 3211 to slide relative to the third inclined surface 3112 and the second inclined surface 3221 to slide relative to the fourth inclined surface 3311. This increases the distance between the brake piston 33 and the regulating member 31, thereby increasing the valve lift and ensuring performance.
[0057] Furthermore, the reset element 34 is a spring, and a blind hole is provided on the side of the regulating valve 32 away from the slide 22. The first end of the spring abuts against the inner wall of the piston chamber 21, and the second end of the spring abuts against the bottom wall of the blind hole. Specifically, in this embodiment, the reset element 34 is a spring, the second end of the spring is located in the blind hole, and the first end of the spring abuts against the inner wall of the piston chamber 21. When it is necessary to reduce the distance between the regulating element 31 and the brake piston 33, the pressure oil is discharged from the slide 22, the spring rebounds, and the regulating valve 32 is reset for the next use, ensuring its performance.
[0058] Specifically, in this embodiment, a spring seat is provided when the spring is set.
[0059] Specifically, in this embodiment, in order to facilitate the installation of the piston body 20, a process hole 61 is provided on the rocker arm 10. During the installation of the piston body 20, the position of the piston body 20 can be adjusted through the process hole 61. After the installation is completed, the process hole 61 is sealed with a rivet 60 to ensure the performance of the rocker arm 10.
[0060] This embodiment also provides a vehicle including valves and the aforementioned valve drive device, with the valves abutting against the brake piston 33 of the valve drive device. The valves of this vehicle are driven by the aforementioned valve drive device. During high-power braking, this increases the intake stroke valve lift, increases the intake volume, and improves the braking power of the first compression release during high-power braking. In practical use, this valve drive device, in conjunction with a specially designed intake cam profile, allows the valves to open again during the power stroke, allowing fresh air to enter the cylinder, increasing the proportion of fresh air in the second compression release during high-power braking, reducing the heat load of the second compression release during high-power braking, and improving the vehicle's fuel economy.
[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A valve actuation device, characterized in that, The valve drive device includes a rocker arm (10) and an adjustment assembly (30). The rocker arm (10) is provided with a receiving cavity (11). The adjustment assembly (30) includes an adjusting member (31), an adjusting valve (32), a brake piston (33), and a reset member (34). The first end of the adjusting member (31) is located in the receiving cavity (11), and the second end of the adjusting member (31) slides through the cavity wall on one side of the receiving cavity (11). The first end of the brake piston (33) is located in the receiving cavity (11), and the second end of the brake piston (33) slides through the cavity wall on one side of the receiving cavity (11). The regulating valve (32) is slidably disposed on the rocker arm (10) on the cavity wall opposite to the receiving cavity (11). The regulating valve (32) can abut against the first end of the brake piston (33) and the first end of the adjusting member (31) respectively, thereby adjusting the distance between the brake piston (33) and the adjusting member (31). The reset member (34) is elastically disposed between the inner wall of the receiving cavity (11) and the regulating valve (32) to provide an elastic force that moves the regulating valve (32) away from the adjusting member (31) and the brake piston (33).
2. The valve drive device according to claim 1, characterized in that, The regulating valve (32) is provided with a first recess (321) and a second recess (322), the regulating member (31) is provided with a first protrusion (311), and the brake piston (33) is provided with a second protrusion (331). The first protrusion (311) can be inserted into the first recess (321), and the second protrusion (331) can be inserted into the second recess (322).
3. The valve drive device according to claim 2, characterized in that, The first recess (321) includes a first inclined surface (3211), and the adjusting member (31) has a third inclined surface (3112) that is slidable along the first inclined surface (3211). And / or, the second recess (322) includes a second inclined surface (3221), and the first end of the brake piston (33) has a fourth inclined surface (3311) that is slidable along the second inclined surface (3221).
4. The valve drive device according to claim 3, characterized in that, The first recess (321) further includes a first plane (3212), which is connected to the first inclined surface (3211). The adjusting member (31) has a second plane (3113), which is connected to the third inclined surface (3112). When the first inclined surface (3211) and the third inclined surface (3112) are fully abutted, the first plane (3212) and the second plane (3113) abutted. And / or, the second recess (322) further includes a third plane (3222) connected to the second inclined surface (3221), the brake piston (33) has a fourth plane (3312) connected to the fourth inclined surface (3311), and the third plane (3222) and the fourth plane (3312) abut when the second inclined surface (3221) and the fourth inclined surface (3311) are in full contact.
5. The valve drive device according to claim 4, characterized in that, The first recess (321) further includes a fifth inclined surface (3213), which is connected to the end of the first plane (3212) away from the first inclined surface (3211), and the fifth inclined surface (3213) is used to limit the adjustment member (31); And / or, the second recess (322) further includes a sixth inclined surface (3223) connected to the end of the third plane (3222) away from the second inclined surface (3221), the sixth inclined surface (3223) being used to limit the brake piston (33).
6. The valve actuation device according to any one of claims 1-5, characterized in that, The valve drive device further includes a piston body (20), which is disposed in the receiving cavity (11). The piston body (20) has a piston chamber (21) and a slide (22). The slide (22) and the piston chamber (21) are connected. The first end of the adjusting member (31) and the first end of the brake piston (33) are both located in the piston chamber (21). The slide (22) is disposed through the side wall of the piston body (20). The adjusting valve (32) is slidably disposed in the slide (22).
7. The valve drive device according to claim 6, characterized in that, The adjusting member (31) includes a connected stud and a first adjusting part. The first adjusting part is disposed in the piston cavity (21). The rocker arm (10) is provided with a first through hole. The part of the stud extending out of the piston cavity (21) is slidably disposed in the first through hole. The peripheral wall of the piston cavity (21) is provided with a first retaining ring (40). The first retaining ring (40) can abut against the end of the first adjusting part away from the brake piston (33). And / or, the brake piston (33) includes a connected piston rod and a second adjusting part, the second adjusting part being disposed in the piston cavity (21), the rocker arm (10) being provided with a third through hole, the portion of the piston rod extending out of the piston cavity (21) being slidably disposed in the third through hole, the peripheral wall of the piston cavity (21) being provided with a second retaining ring (50), the second retaining ring (50) being able to abut against the end of the second adjusting part away from the adjusting member (31).
8. The valve drive device according to claim 6, characterized in that, The rocker arm (10) is also provided with an oil passage (12), which is connected to the slide rail (22).
9. The valve drive device according to claim 6, characterized in that, The reset component (34) is a spring. The regulating valve (32) has a blind hole on the side away from the slide (22). The first end of the spring abuts against the inner wall of the piston chamber (21), and the second end of the spring abuts against the bottom wall of the blind hole.
10. A vehicle, the vehicle including valves, characterized in that, The vehicle further includes a valve actuation device as described in any one of claims 1-9, wherein the valve is capable of abutting against the brake piston (33) of the valve actuation device.