Cylinder deactivation device and engine

Abstract

This application relates to a cylinder deactivation device and an engine. The cylinder deactivation device includes a rocker arm, a valve bridge, and a locking assembly. The valve bridge has a receiving cavity, and the locking assembly is used to adjust the transmission state between the rocker arm and the valve bridge. The locking assembly is disposed within the receiving cavity. The locking assembly includes a sliding member and a blocking mechanism. The sliding member is drively connected to the rocker arm, and the blocking mechanism is disposed between the sliding member and the valve bridge. The blocking mechanism has a first position and a second position. When the blocking mechanism is in the first position, the sliding member and the valve bridge move synchronously, and the rocker arm drives the valve bridge to move. When the blocking mechanism is in the second position, the sliding member and the valve bridge are slidably connected, and the movements of the rocker arm and the valve bridge are independent. This application adjusts the transmission state between the rocker arm and the valve bridge by adjusting the locking assembly to a locked state and an unlocked state, thereby realizing the rocker arm driving the valve or stopping the driving valve. The mechanical structure is simple, and the layout and adjustment are convenient.

Description

Technical Field

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

[0002] Cylinder deactivation technology, also known as variable displacement technology, refers to the use of mechanisms and strategies to control or cut off the fuel supply, ignition, and intake and exhaust of some cylinders when the engine is under partial load, thereby increasing the load rate of the remaining working cylinders and improving efficiency, thus enhancing fuel economy. Simultaneously, the increased load rate also leads to a rise in exhaust temperature, which is crucial for aftertreatment systems employing selective catalytic reduction (SCR) technology. The increased exhaust temperature improves the conversion efficiency of the SCR catalytic converter, contributing to the efficient operation of the entire aftertreatment system.

[0003] In traditional technology, engine cylinder deactivation often employs hydraulic actuation, using a hydraulic mechanism to control the latch assembly, thereby controlling valve deactivation. These mechanisms utilize engine oil, and the oil pressure is related to engine speed, varying significantly across different speeds. Furthermore, oil viscosity varies considerably at different temperatures, affecting the friction and leakage of the cylinder deactivation mechanism. These differences in oil pressure and viscosity lead to varying responses from the cylinder deactivation mechanism. This necessitates calibration of the cylinder deactivation mechanism under different engine operating conditions and temperatures, requiring modifications to the oil passages. The system is complex, difficult to implement, costly, and highly susceptible to the influence of engine temperature and operating conditions. Summary of the Invention

[0004] Therefore, it is necessary to provide a cylinder deactivation device and engine, which addresses the problem that most engine cylinder deactivation systems use hydraulic oil-driven operation, requiring modification of the oil circuit and presenting installation difficulties.

[0005] An embodiment of the first aspect of this application provides a cylinder deactivation device, comprising:

[0006] rocker arm; and

[0007] Valve bridge, wherein the valve bridge is provided with a receiving cavity;

[0008] A locking assembly is used to adjust the transmission state between the rocker arm and the valve bridge, and the locking assembly is disposed within the receiving cavity;

[0009] The locking assembly includes a sliding member and a blocking mechanism. The sliding member is connected to the rocker arm in a transmission manner, and the blocking mechanism is disposed between the sliding member and the valve bridge. The blocking mechanism has a first position and a second position.

[0010] When the blocking mechanism is in the first position, the sliding member moves synchronously with the valve bridge, and the rocker arm drives the valve bridge to move.

[0011] When the blocking mechanism is in the second position, the sliding member is slidably connected to the valve bridge, and the rocker arm moves independently of the valve bridge.

[0012] In one embodiment, the blocking mechanism includes a cylinder-stopping baffle and a driving member that are connected in a driving relationship. The driving member drives the cylinder-stopping baffle to rotate, and the driving method of the driving member is electromagnetic drive.

[0013] In one embodiment, the slider includes a slider and a first protrusion, the first protrusion being disposed at the end of the slider; the bottom of the receiving cavity is provided with a first recess, the first recess being disposed in a position corresponding to the first protrusion;

[0014] When the blocking mechanism is in the first position, the cylinder stop plate is blocked between the first protrusion and the first recess;

[0015] When the blocking mechanism is in the second position, the first protrusion can penetrate the cylinder stop plate and slide in connection with the first recess.

[0016] In one embodiment, the cylinder deactivation plate includes a plate body and a second recess, the second recess being for the first protrusion to pass through, and the second recess being disposed circumferentially on the plate body.

[0017] In one embodiment, the locking assembly further includes an elastic mechanism for forming an elastic support between the sliding member and the valve bridge along the sliding direction of the sliding member.

[0018] In one embodiment, the valve bridge includes a support member disposed at the bottom of the receiving cavity, and the blocking mechanism is disposed between the sliding member and the support member;

[0019] The elastic mechanism includes a pressure seat and an elastic element. The pressure seat is sleeved on the outer circumferential side of the sliding element, and the elastic element is sleeved on the outer circumferential side of the support element. The sliding element is provided with an abutting portion, and the pressure seat is abutting between the abutting portion and the elastic element.

[0020] In one embodiment, the elastic mechanism further includes a limiting portion for restricting the circumferential rotation of the pressure seat and the slider, the limiting portion being disposed between the pressure seat and the slider.

[0021] In one embodiment, the cylinder deactivation device further includes a guide mechanism for limiting rotation between the slider and the valve bridge, the guide mechanism being disposed between the slider and the receiving cavity.

[0022] In one embodiment, the guiding mechanism includes a guide block and a guide groove, one of which is disposed on the side wall of the slider and the other is disposed on the side wall of the receiving cavity. The guide block extends into the guide groove and slides along the guide groove.

[0023] An embodiment of the second aspect of this application provides an engine including the aforementioned cylinder deactivation device.

[0024] The aforementioned cylinder deactivation device, by setting a locking assembly between the rocker arm and the valve bridge, with the locking assembly housed within the valve bridge's receiving cavity, includes a sliding member and a blocking mechanism. In normal operating mode, the blocking mechanism can be adjusted to a first position, locking the assembly in a locked state. The blocking mechanism prevents relative sliding between the sliding member and the valve bridge. Under the pushing action of the rocker arm, the sliding member pushes the blocking mechanism and the valve bridge to move synchronously, thus allowing the valve to open or close via the valve bridge. In cylinder deactivation mode, the blocking mechanism can be adjusted to a second position, unlocking the locking assembly. The blocking effect of the blocking mechanism on the sliding member and valve bridge disappears, allowing the sliding member to slide against the valve bridge. Under the pushing action of the rocker arm, the sliding member counteracts the rocker arm's pushing action by sliding against the valve bridge. The movement of the sliding member and the valve bridge is independent. Therefore, by adjusting the transmission state between the rocker arm and the valve bridge, the rocker arm can drive or stop driving the valve. The mechanical structure is simple, and its installation and adjustment are convenient. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the cylinder deactivation device according to an embodiment of this application.

[0026] Figure 2 This is an internal schematic diagram of the cylinder deactivation device in normal operating mode according to an embodiment of this application.

[0027] Figure 3 This is a schematic diagram showing the position of the blocking mechanism when the cylinder deactivation device of this application is in normal working mode.

[0028] Figure 4 This is an internal schematic diagram of the cylinder deactivation device in cylinder deactivation mode according to an embodiment of this application.

[0029] Figure 5 This is a schematic diagram showing the position of the blocking mechanism when the cylinder deactivation device is in cylinder deactivation mode according to an embodiment of this application.

[0030] Figure 6This is a schematic diagram of the locking assembly of the cylinder deactivation device according to an embodiment of this application.

[0031] Figure 7 This is a schematic diagram of the sliding component of the cylinder deactivation device according to an embodiment of this application.

[0032] Figure 8 This is a schematic diagram of the support member of the cylinder deactivation device according to an embodiment of this application.

[0033] Figure 9 This is a schematic diagram of the cylinder deactivation baffle of the cylinder deactivation device according to an embodiment of this application.

[0034] Figure 10 This is a schematic diagram showing the position of the guide groove of the cylinder stopping device according to an embodiment of this application.

[0035] Figure 11 This is a schematic diagram of another structure of the locking assembly of the cylinder deactivation device according to an embodiment of this application.

[0036] In the picture:

[0037] 1. Rocker arm;

[0038] 2. Valve bridge; 21. Receiving cavity; 22. First recess; 23. Support member;

[0039] 3. Locking assembly;

[0040] 31. Sliding component; 311. Sliding block; 312. First protrusion; 313. Abutment part;

[0041] 32. Stopping mechanism; 321. Cylinder stop plate; 3211. Plate body; 3212. Second recessed part; 322. Driving component;

[0042] 33. Elastic mechanism; 331. Pressure seat; 332. Elastic element; 333. Limiting part;

[0043] 4. Guiding mechanism; 41. Guide block; 42. Guide groove. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] See Figure 1-2 The figure shows an internal schematic diagram of the cylinder deactivation device in normal operating mode according to an embodiment of this application. The cylinder deactivation device provided in one embodiment of this application includes a rocker arm 1, a valve bridge 2, and a locking assembly 3. The valve bridge 2 is provided with a receiving cavity 21, and the locking assembly 3 is disposed within the receiving cavity 21, occupying little space and being easy to install. The valve bridge 2 is used to adjust the synchronous opening or closing of the same-phase valves. The locking assembly 3 includes a sliding member 31 and a blocking mechanism 32. The sliding member 31 is drively connected to the rocker arm 1, meaning that the movement of the rocker arm 1 can drive the sliding member 31 to move. The blocking mechanism 32 is disposed between the sliding member 31 and the valve bridge 2, and is used to adjust the engagement state between the sliding member 31 and the valve bridge 2. Specifically, the blocking mechanism 32 can be disposed between the end of the sliding member 31 and the bottom of the receiving cavity 21. The blocking mechanism 32 has a first position and a second position. When the blocking mechanism 32 is in the first position, the sliding member 31 moves synchronously with the valve bridge 2, and the rocker arm 1 drives the valve bridge 2 to move, that is, the rocker arm 1 and the valve bridge 2 are driven by each other. When the blocking mechanism 32 is in the second position, the sliding member 31 is slidably connected with the valve bridge 2, and the rocker arm 1 and the valve bridge 2 move independently, that is, the rocker arm 1 and the valve bridge 2 are not driven by each other.

[0051] For this setting, please refer to [link / reference]. Figure 2-3 In normal operating mode, the stop mechanism 32 can be adjusted to the first position to lock the locking assembly 3. The stop mechanism 32 prevents the relative sliding of the sliding member 31 and the valve bridge 2. Under the pushing action of the rocker arm 1, the sliding member 31 can push the stop mechanism 32 and the valve bridge 2 to move synchronously, thereby opening or closing the valve through the valve bridge 2. (See reference...) Figure 4-5In cylinder deactivation mode, the adjustable blocking mechanism 32 can be moved to the second position to unlock the locking assembly 3. This means that the blocking effect of the blocking mechanism 32 on the sliding member 31 and the valve bridge 2 disappears, and the sliding member 31 can slide and connect with the valve bridge 2. Under the pushing action of the rocker arm 1, the sliding member 31 counteracts the pushing action of the rocker arm 1 by sliding against the valve bridge 2. The movement of the sliding member 31 is independent of the movement of the valve bridge 2. That is, the movement of the sliding member 31 will not drive the movement of the valve bridge 2. The movement of the rocker arm 1 is no longer transmitted to the valve bridge 2 or even the valve through the locking assembly 3. The position of the valve bridge 2 remains unchanged, so the valve state cannot be adjusted through the valve bridge 2, so that the valve will not open and will remain closed. The fuel injection in the cylinder stops, thus achieving cylinder deactivation. This embodiment sets a locking assembly 3 between the rocker arm 1 and the valve bridge 2. The locking assembly 3 is located in the receiving cavity 21 of the valve bridge 2. By adjusting the locking assembly 3 to the locked state and the unlocked state, the transmission state between the rocker arm 1 and the valve bridge 2 can be adjusted, so that the rocker arm 1 can drive the valve or stop driving the valve. The mechanical structure is simple and the layout and adjustment are convenient. It solves the problem that the engine cylinder deactivation is mostly driven by oil hydraulics, which requires modification of the oil circuit and is difficult to lay out.

[0052] It should be noted that rocker arm 1 refers to the drive mechanism that drives valve bridge 1. Rocker arm 1 may include an arm body, a rotating shaft, and a camshaft. The rotating shaft may be located in the middle of the arm body, with the camshaft and valves located on opposite sides of the rotating shaft. The cylinder deactivation device is located between the first end of the arm body and the valve, and the camshaft is located at the second end of the arm body, with the first and second ends of the arm body being opposite each other. The rotation of the camshaft can cause the arm body to swing around the rotating shaft, and the first end of the arm body can follow suit to drive the cylinder deactivation device to perform corresponding valve actions. Intake and exhaust passages may also be provided within the arm body. Rocker arm 1 may also include a connecting post and a connecting seat. The connecting post may be arranged along the sliding direction of the sliding member 31, and the connecting seat is located between the connecting post and the sliding member 31. The connecting seat may be, but is not limited to, a ball joint or a universal joint, which can convert the swinging motion of the arm body into a pushing motion on the sliding member 31, reducing the force on the sliding member 31 in directions other than the sliding direction. The valve bridge 2 and the valve are matched in a manner similar to traditional technology. Optionally, the valve bridge 2 may have connection positions on both sides for connecting the valve stem. The valve bridge 2 needs to apply pressure to the valve stem to push the valve stem to open the valve.

[0053] Combination Figure 4 and 6As shown, in some embodiments, the cylinder deactivation mechanism 32 includes a cylinder deactivation plate 321 and a drive member 322. The cylinder deactivation plate 321 and the drive member 322 are connected in a transmission manner. That is, the cylinder deactivation plate 321 can be directly mounted on the drive shaft of the drive member 322, or the drive member 322 can drive the cylinder deactivation plate 321 to rotate through a transmission component such as gears. The drive member 322 can be built into the valve bridge 2. The drive member 322 drives the cylinder deactivation plate 321 to rotate, thereby switching between a first position and a second position, and thus adjusting the locking state and unlocking state of the locking assembly 3. The drive method of the drive member 322 is electromagnetic drive. The cylinder deactivation device of each cylinder has fast response, good consistency, simple structure, minimal modification to the valve train, and is easy to arrange on the engine. The drive member 322 may include a solenoid valve, which can more conveniently adjust the rotation of the cylinder deactivation plate 321, and has a simple structure and is easier to install.

[0054] See Figure 6-8 In some embodiments, the slider 31 includes a slider 311 and a first protrusion 312, the first protrusion 312 being disposed at the end of the slider 311; the bottom of the receiving cavity 21 is provided with a first recess 22, the first recess 22 being an open groove or hole structure, and the positions of the first recess 22 and the first protrusion 312 are correspondingly disposed.

[0055] When the blocking mechanism 32 is in the first position, the cylinder stop plate 321 is blocked between the first protrusion 312 and the first recess 22. The first protrusion 312 and the first recess 22 are respectively located on both sides of the cylinder stop plate 321. When the first protrusion 312 is pressed, it can push the cylinder stop plate 321 and the first recess 22 to move synchronously, thereby applying pressure to the valve bridge 2 and adjusting the valve opening and closing state.

[0056] When the blocking mechanism 32 is in the second position, the first protrusion 312 can penetrate the cylinder deactivation plate 321 and slide in connection with the first recess 22. That is, the blocking effect of the cylinder deactivation plate 321 on the first protrusion 312 and the first recess 22 disappears. When the rocker arm 1 applies pressure to the sliding member 31, the first protrusion 312 extends into the first recess 22 and slides, and no longer applies pressure to the valve bridge 2, thereby keeping the valve closed. The first protrusion 312 and the first recess 22 cooperate with each other and can guide each other during the sliding process, making the sliding more stable.

[0057] See Figure 6The figure shows a schematic diagram of a locking assembly of a cylinder deactivation device according to an embodiment of this application. At least two sets of first protrusions 312 and first recesses 22 can be provided in a one-to-one correspondence. In this case, the first protrusion 312 can be designed as multiple long rod-shaped structures, arranged circumferentially along the end of the slider 311. The first recess 22 can be designed as multiple elongated holes for the first protrusion 312 to slide into, thereby forming multiple sliding action points between the slider 311 and the valve bridge 2. During the sliding process, the circumferential force between the slider 311 and the valve bridge 2 is more uniform, and the movement is more stable.

[0058] See Figure 4 and Figure 9 In some embodiments, the cylinder deactivation plate 321 includes a plate body 3211 and a second recess 3212. The second recess 3212 is an open slot or hole structure for the first protrusion 312 to pass through. The second recess 3212 is disposed circumferentially on the plate body 3211. That is, when the cylinder deactivation plate 321 rotates to the second position, the second recess 3212 is aligned with the first protrusion 312, and the first protrusion 312 can slide against the first recess 22 after passing through the second recess 3212. When the cylinder deactivation plate 321 rotates to the first position, the position of the second recess 3212 deviates from the position of the first protrusion 312, and the plate body 3211 will be positioned between the first protrusion 312 and the first recess 22. The first protrusion 312 no longer extends into the first recess 22, but instead pushes the plate body 3211 and the valve bridge 2 to move synchronously.

[0059] The sum of the depth of the first recess 22 and the thickness of the plate body 3211 is greater than the length of the first protrusion 312, so that when the blocking mechanism 32 is in the second position, the first protrusion 312 can always maintain a sliding state with the first recess 22. Alternatively, the length of the first protrusion 312 is at least greater than the valve lift, to ensure that within the valve lift range, the slider 31 and the valve bridge 2 slide relative to each other, and the movement of the rocker arm 1 will not cause the valve bridge 2 to move, thus keeping the valve closed.

[0060] See Figure 3In some embodiments, the locking assembly 3 further includes an elastic mechanism 33, which forms an elastic support between the sliding member 31 and the valve bridge 2 along the sliding direction of the sliding member 31, so as to push the sliding member 31 back to its original position. The elastic mechanism 33 may be disposed between the sliding member 31 and the bottom wall of the receiving cavity 21 of the valve bridge 2, and the elastic mechanism 33 may be, but is not limited to, a spring or an elastic tube. Optionally, the sliding member 31 and the rocker arm 1 may be fixedly connected. During the process of the rocker arm 1 driving the sliding member 31 to move in the opposite direction, the elastic mechanism 33 can push the sliding member 31 back to its original position. Alternatively, the rocker arm 1 may simply abut against the sliding member 31. The rocker arm 1 can push the sliding member 31 to press down the blocking mechanism 32. When the rocker arm 1 is lifted in the opposite direction, the sliding member 31 can return to its original position under the elastic force of the elastic mechanism 33. The elastic mechanism 33 can also keep the sliding member 31 abutting against the rocker arm 1.

[0061] See Figure 4 and Figure 6 In some embodiments, the valve bridge 2 includes a support member 23 disposed at the bottom of the receiving cavity 21, and a first recess 22 may be formed on the support member 23. The support member 23 may be a hollow columnar structure, and the drive member 322 may be built into the hollow inner cavity of the support member 23. The first recess 22 is formed on the circumferential sidewall of the support member 23, and the opening of the first recess 22 faces the sliding member 31. A blocking mechanism 32 is disposed between the sliding member 31 and the support member 23, that is, the cylinder deactivation plate 321 can adjust the engagement state of the sliding member 31 and the support member 23.

[0062] The support member 23 and the valve bridge 2 can be integrally formed, or they can be detachably connected, both of which can prevent the support member 23 from separating from the valve bridge 2. Optionally, the support member 23 and the valve bridge 2 can be bolted or snap-fitted. Both the cylinder deactivation plate 321 and the support member 23 can be cylindrical structures. The outer diameter of the cylinder deactivation plate 321 is equal to or smaller than the outer diameter of the support member 23, and the outer diameter of the cylinder deactivation plate 321 is larger than the inner diameter of the support member 23, so that the cylinder deactivation plate 321 can be positioned between the support member 23 and the sliding member 31.

[0063] See Figure 4 and Figure 6In some embodiments, the elastic mechanism 33 includes a pressure seat 331 and an elastic element 332. The pressure seat 331 may be a hollow tubular structure and may be sleeved on the outer circumferential side of the sliding member 31. The pressure seat 331 can slide and engage with the side wall of the receiving cavity 21 and can guide the sliding of the sliding member 31. The elastic element 332 is sleeved on the outer circumferential side of the support member 23, that is, a gap is left between the support member 23 and the receiving cavity 21 for the elastic element 332 to be installed. The sliding member 31 is provided with an abutment portion 313, and the pressure seat 331 is abutted between the abutment portion 313 and the elastic element 332. When the first protrusion 312 of the sliding member 31 slides into the first recess 22, the elastic element 332 can elastically deform, forming an elastic buffer between the sliding member 31 and the support member 23. When the sliding member 31 moves in the opposite direction, the elastic element 332 can also restore its deformation and push the upper part of the sliding member 31 to maintain abutment with the rocker arm 1.

[0064] Specifically, see Figure 4 and Figure 7 The first protrusion 312 can retract into the circumferential edge of the slider 311 near the center position, thereby forming a stepped groove between the slider 311 and the first protrusion 312, which serves as an abutment part 313 for the pressure seat 331 to connect to. The distance from the bottom surface of the pressure seat 331 to the bottom surface of the slider 311 is greater than the valve lift, so that the pressure seat 331 can maintain the sleeved state with the slider 31.

[0065] See Figure 6 In some embodiments, the elastic mechanism 33 further includes a limiting part 333, which is used to limit the circumferential rotation of the pressure seat 331 and the slider 31. The limiting part 333 is disposed between the pressure seat 331 and the slider 311. That is, the limiting part 333 can be a concave-convex mating structure to form a guide limit between the pressure seat 331 and the slider 311, so as to avoid relative rotation between the pressure seat 331 and the slider 31 and affect the movement of the slider 31.

[0066] Specifically, the limiting part 333 can be disposed on the inner sidewall of the first end of the pressure seat 331, the first end of the pressure seat 331 being the end near the slider 311. One or more limiting parts 333 can be provided, and the limiting part 333 can be a protrusion structure. The limiting part 333 is located between the slider 311 and the support member 23, and the limiting part 333 can extend inward to the space between adjacent first protrusions 312. A recessed cavity is formed between adjacent first protrusions 312 to cooperate with the limiting part 333, thereby limiting the circumferential rotation of the pressure seat 331 and the slider 311.

[0067] See Figure 1In some embodiments, the cylinder deactivation device further includes a guide mechanism 4 for restricting the rotation between the sliding member 31 and the valve bridge 2. The guide mechanism 4 is disposed between the sliding member 31 and the receiving cavity 21. With this arrangement, the sliding member 31 can slide along the guide mechanism 4, avoiding arbitrary rotation between the sliding member 31 and the receiving cavity 21. This allows the first protrusion 312 of the sliding member 31 to remain aligned with the first recess 22. When both are aligned with the second recess 3212, the first protrusion 312 can penetrate the second recess 3212 and extend more accurately into the first recess 22, making the switching between the locking state and the unlocking state of the locking assembly 3 more accurate and convenient.

[0068] See Figure 7 and Figure 10 In some embodiments, the guide mechanism 4 includes a guide block 41 and a guide groove 42. One of the guide block 41 and the guide groove 42 is disposed on the side wall of the sliding member 31, and the other is disposed on the side wall of the receiving cavity 21. The guide block 41 extends into the guide groove 42 and slides along the guide groove 42. The relative sliding direction of the guide block 41 and the guide groove 42 is the same as the sliding direction of the first protrusion 312 and the first recess 22. This enables the sliding member 31 and the valve bridge 2 to move in a directional manner, so that the first protrusion 312 of the sliding member 31 can maintain the opposite rotation state with the first recess 22, making the switching between the locking state and the unlocking state of the locking assembly 3 more accurate and convenient.

[0069] Optionally, the guide block 41 can be disposed on the side wall of the slider 31, and the guide groove 42 can be formed on the side wall of the receiving cavity 21. The guide block 41 extends into the guide groove 42 and slides, which can guide the relative movement between the slider 31 and the valve bridge 2, and also prevent the slider 31 from rotating arbitrarily.

[0070] See Figure 11 The figure shows another structural schematic diagram of the locking assembly of the cylinder stopping device according to an embodiment of this application. A set of first protrusions 312 and first recesses 22 can be provided one-to-one. In this case, the first protrusion 312 can be designed as a semi-circular annular protrusion, and the first recess 22 can be designed as a semi-circular annular groove for the first protrusion 312 to slide in. The two can have a large sliding contact area, which is convenient for processing and design.

[0071] See Figure 1-2Another embodiment of this application provides an engine including the aforementioned cylinder deactivation device. The engine may further include an engine block, valves, and valve stems. The valve stems pass through and are abutted within the valves. The rocker arm 1 may be disposed on the outside of the engine block, and the valve bridge 2 is used for transmission connection with the valve stem. In normal operating mode, the abutment mechanism 32 can be adjusted to a first position to lock the locking assembly 3. The abutment mechanism 32 can prevent the relative sliding of the sliding member 31 and the valve bridge 2. Under the pushing action of the rocker arm 1, the sliding member 31 can push the abutment mechanism 32 and the valve bridge 2 to move synchronously, thereby opening or closing the valves through the valve bridge 2. In cylinder deactivation mode, the adjustable blocking mechanism 32 is moved to the second position, unlocking the locking assembly 3. This means the blocking effect of the blocking mechanism 32 on the sliding member 31 and valve bridge 2 disappears, allowing the sliding member 31 to slide against the valve bridge 2. Under the pushing action of the rocker arm 1, the sliding member 31 counteracts the rocker arm 1's push by sliding against the valve bridge 2. The movement of the sliding member 31 is independent of the movement of the valve bridge 2; that is, the movement of the sliding member 31 does not drive the movement of the valve bridge 2. The movement of the rocker arm 1 is no longer transmitted to the valve bridge 2 or even the valves via the locking assembly 3. At the valve, the position of valve bridge 2 remains unchanged, so the valve state cannot be adjusted through valve bridge 2, so the valve will not open and will remain closed, and the fuel injection in the cylinder will stop, thus achieving cylinder deactivation. By setting a locking component 3 between rocker arm 1 and valve bridge 2, and the locking component 3 is set in the receiving cavity 21 of valve bridge 2, the transmission state between rocker arm 1 and valve bridge 2 can be adjusted by adjusting the locking component 3 to the locked state and the unlocked state, so that rocker arm 1 can drive the valve or stop driving the valve. The mechanical structure is simple and convenient to install and adjust.

[0072] 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.

[0073] 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 deactivation device, characterized in that, include: rocker arm (1); as well as Valve bridge (2), wherein the valve bridge (2) is provided with a receiving cavity (21); Locking assembly (3) is used to adjust the transmission state between the rocker arm (1) and the valve bridge (2), and the locking assembly (3) is disposed in the receiving cavity (21); The locking assembly (3) includes a sliding member (31) and a blocking mechanism (32). The sliding member (31) is connected to the rocker arm (1) in a transmission manner. The blocking mechanism (32) is disposed between the sliding member (31) and the valve bridge (2). The blocking mechanism (32) has a first position and a second position. When the blocking mechanism (32) is in the first position, the sliding member (31) moves synchronously with the valve bridge (2), and the rocker arm (1) drives the valve bridge (2) to move. When the blocking mechanism (32) is in the second position, the sliding member (31) is slidably connected to the valve bridge (2), and the rocker arm (1) moves independently of the valve bridge (2); The blocking mechanism (32) includes a cylinder stop plate (321) and a driving member (322) that are connected in a transmission relationship. The driving member (322) drives the cylinder stop plate (321) to rotate. The driving method of the driving member (322) is electromagnetic drive. The slider (31) includes a slider (311) and a first protrusion (312), the first protrusion (312) being disposed at the end of the slider (311); the bottom of the receiving cavity (21) is provided with a first recess (22), the first recess (22) being disposed in a position corresponding to the first protrusion; When the blocking mechanism (32) is in the first position, the cylinder stop plate (321) is blocked between the first protrusion (312) and the first recess (22); When the blocking mechanism (32) is in the second position, the first protrusion (312) can penetrate the cylinder stop plate (321) and slide with the first recess (22). The locking assembly (3) further includes an elastic mechanism (33), which is used to form an elastic support between the sliding member (31) and the valve bridge (2) along the sliding direction of the sliding member (31); The valve bridge (2) includes a support member (23), which is disposed at the bottom of the receiving cavity (21), and the blocking mechanism (32) is disposed between the sliding member (31) and the support member (23); The elastic mechanism (33) includes a pressure seat (331) and an elastic element (332). The pressure seat (331) is sleeved on the outer circumferential side of the sliding element (31), and the elastic element (332) is sleeved on the outer circumferential side of the support element (23). The sliding element (31) is provided with an abutting part (313), and the pressure seat (331) is abutting between the abutting part (313) and the elastic element (332).

2. The cylinder deactivation device according to claim 1, characterized in that, The length of the first protrusion (312) is at least greater than the valve lift.

3. The cylinder deactivation device according to claim 1, characterized in that, The slider (31) and the rocker arm (1) are fixedly connected.

4. The cylinder deactivation device according to claim 1, characterized in that, The rocker arm (1) abuts against the slider (31).

5. The cylinder deactivation device according to claim 1, characterized in that, The support member (23) and the valve bridge (2) are connected by bolts or snap-fit.

6. The cylinder deactivation device according to claim 1, characterized in that, The cylinder stop plate (321) includes a plate body (3211) and a second recess (3212). The second recess (3212) is used for the first protrusion (312) to pass through, and the second recess (3212) is disposed in the circumferential direction of the plate body (3211).

7. The cylinder deactivation device according to claim 1, characterized in that, The elastic mechanism (33) further includes a limiting part (333), which is used to limit the circumferential rotation of the pressure seat (331) and the slider (31). The limiting part (333) is disposed between the pressure seat (331) and the slider (311).

8. The cylinder deactivation device according to claim 1, characterized in that, The cylinder deactivation device further includes a guide mechanism (4) for restricting the rotation between the sliding member (31) and the valve bridge (2), and the guide mechanism (4) is disposed between the sliding member (31) and the receiving cavity (21).

9. The cylinder deactivation device according to claim 8, characterized in that, The guiding mechanism (4) includes a guide block (41) and a guide groove (42). One of the guide block (41) and the guide groove (42) is disposed on the side wall of the sliding member (31), and the other is disposed on the side wall of the receiving cavity (21). The guide block (41) extends into the guide groove (42), and the guide block (41) slides along the guide groove (42).

10. An engine, characterized in that, Includes the cylinder deactivation device as described in any one of claims 1-9.

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