CN115013168A

CN115013168A - Engine cylinder opens and stops device

Info

Publication number: CN115013168A
Application number: CN202210730567.9A
Authority: CN
Inventors: 郭立新
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-09-06
Anticipated expiration: 2042-06-24
Also published as: CN115013168B

Abstract

The invention belongs to the technical field of automobile parts and discloses an engine cylinder starting and stopping device which comprises a control mechanism, a cylinder stopping mechanism and a reset mechanism, wherein the control mechanism comprises a shaft sleeve, the shaft sleeve is sleeved on a rotating shaft through a locking structure, the shaft sleeve can rotate around the axis of the rotating shaft along with the rotating shaft, the cylinder stopping mechanism is configured to enable the shaft sleeve to be converted from the first working position to the second working position, and the resetting mechanism is configured to enable the shaft sleeve to be reset from the second working position to the first working position. The starting and stopping device for the engine cylinder is simple in structure, convenient to arrange and low in manufacturing cost.

Description

Engine cylinder opens and stops device

Technical Field

The invention relates to the technical field of automobile parts, in particular to an engine cylinder starting and stopping device.

Background

The cylinder deactivation technology is characterized in that when the engine runs at a partial load, the fuel supply, ignition and air intake and exhaust of partial cylinders are controlled or cut off through relevant mechanisms and strategies to stop the operation of the partial cylinders, so that the load factor of the rest working cylinders is increased, the efficiency is improved, and the aim of improving the fuel economy is fulfilled. At the same time, the increase in load factor also brings about an increase in exhaust gas temperature, which is of great importance for aftertreatment systems using SCR technology. The increase in exhaust temperature increases the conversion efficiency of the SCR catalyst, which facilitates efficient operation of the entire aftertreatment system.

However, when the engine adopts the cylinder deactivation technique, if only the fuel injection and ignition of the deactivated cylinder are interrupted, the deactivated cylinder still continuously admits and exhausts air, and the fuel saving effect is not obvious due to pumping loss. Therefore, in an engine adopting the cylinder deactivation technology, an engine cylinder start-stop device is needed to control the intake valve and the exhaust valve of the cylinder so as to stop or open the intake valve and the exhaust valve of the cylinder.

In the prior art, the latch assembly is generally controlled by a hydraulic mechanism to realize the control of the valve of the cylinder, the structure utilizes the oil of the engine, the oil pressure of the engine is related to the rotating speed of the engine, and the oil pressure difference is larger under different rotating speeds. In addition, the viscosity of the engine oil at different temperatures is very different, which can cause the cylinder deactivation mechanism to generate great friction and possible leakage. Meanwhile, the cylinder stopping mechanisms under different engine oil pressures and different viscosities respond differently, so that the cylinder stopping mechanisms need to be calibrated under different working conditions and different temperatures of the engine respectively, and meanwhile, the oil circuit of the engine oil needs to be improved. In conclusion, the starting and stopping device for the engine cylinder in the prior art is complex in structure, difficult to arrange and high in manufacturing cost.

Therefore, the above problems need to be solved.

Disclosure of Invention

The invention aims to provide an engine cylinder starting and stopping device which is simple in structure, convenient to arrange and low in manufacturing cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

an engine cylinder start-stop apparatus comprising:

the control mechanism comprises a shaft sleeve, a rotating shaft is sleeved with the locking structure through the locking structure, the locking structure is configured to lock the shaft sleeve along the circumferential direction of the rotating shaft, the shaft sleeve can rotate around the axis of the shaft sleeve along with the rotating shaft and can axially slide along the rotating shaft, a cam is arranged on the shaft sleeve, the axis of the cam is parallel to the axis of the shaft sleeve, the shaft sleeve is provided with a first working position and a second working position, the first working position enables the cam to be opposite to and abutted against a rocker arm used for opening or closing a valve of an engine cylinder, the second working position moves for a preset distance along the axial direction of the rotating shaft, and the preset distance is set to be larger than or equal to the width of the cam along the axial direction of the shaft sleeve;

a cylinder deactivation mechanism configured to transition the bushing from the first operating position to the second operating position; and

a reset mechanism configured to reset the hub from the second operating position to the first operating position.

Preferably, the cylinder deactivation mechanism comprises a first groove, a second groove, a third groove and a push rod, the first groove, the second groove and the third groove are all arranged on the shaft sleeve, the first groove and the second groove extend along the circumferential direction of the shaft sleeve, and are arranged at intervals along the axial direction of the shaft sleeve, the distance between the first groove and the second groove is larger than or equal to the width of the cam along the axial direction of the shaft sleeve, the first groove and the second groove are communicated through the third groove, the push rod is fixedly arranged in a plane vertical to the central line of the push rod, the push rod has a first working state far away from the shaft sleeve and a second working state capable of extending into the first groove, when the shaft sleeve rotates around the axis of the shaft sleeve along with the rotating shaft, the push rod in the second working state can slide into the second groove through the third groove.

Preferably, the groove bottom of the third groove extends into the first groove, the depth of the groove bottom of the third groove extending into the first groove is greater than that of the first groove, and the end of the push rod can be attached to the groove bottom of the third groove extending into the first groove.

Preferably, the depth of the junction between the third groove and the second groove is smaller than the depth of the second groove, and the radial stroke of the push rod along the shaft sleeve is larger than the radial distance between the deepest part of the push rod and the third groove in the first working state along the shaft sleeve.

Preferably, the rocker arm and the push rod are arranged at intervals along the axial direction of the shaft sleeve, and the projection of the third groove in the axial direction of the shaft sleeve is not overlapped with the projection of the cam in the axial direction of the shaft sleeve.

Preferably, the engine cylinder start-stop device comprises an electromagnetic valve, and the push rod is a valve core of the electromagnetic valve.

Preferably, the solenoid valve is provided with a first return spring, and the first return spring can be elastically deformed when the valve core is switched from the first working state to the second working state, so as to have elastic potential energy for restoring the valve core to the first working state when the solenoid valve is powered off.

Preferably, the reset mechanism includes a second reset spring and a first stopper, the second reset spring is connected or abutted between the first stopper and the bushing, and when the bushing is switched from the first working position to the second working position, the second reset spring can be elastically deformed so as to have elastic potential energy for resetting the bushing from the second working position to the first working position when the push rod is in the first working state.

Preferably, the engine cylinder start-stop device further comprises a second stop block, the second stop block is arranged on one side, away from the first stop block, of the shaft sleeve, and the shaft sleeve located at the first working position can be abutted to the second stop block.

Preferably, the locking structure includes a boss and a fourth groove, the boss and the fourth groove both extend in the axial direction of the rotating shaft, the boss can be embedded in the fourth groove, and the boss and the fourth groove are alternatively disposed on the shaft sleeve and the rotating shaft.

The invention has the beneficial effects that: according to the engine cylinder starting and stopping device, when the shaft sleeve is located at the first working position, the rocker arm can be abutted to the cam, the rocker arm can control the valve of the cylinder to be opened or closed in the process that the cam rotates around the axis of the rotating shaft along with the shaft sleeve, when the shaft sleeve is switched from the first working position to the second working position, the cam and the rocker arm are dislocated, the cam cannot be abutted to the rocker arm in the process that the cam rotates around the axis of the rotating shaft along with the shaft sleeve, so that the control on the rocker arm is lost, the rocker arm cannot control the valve of the cylinder, and the valve can be guaranteed to be always in a closed state when the engine stops the cylinder.

Drawings

FIG. 1 is a schematic diagram of an engine cylinder start-stop device according to an embodiment of the invention;

FIG. 2 is a schematic illustration of a cylinder deactivation mechanism in an embodiment of the present invention.

In the figure:

1. a control mechanism; 11. a shaft sleeve; 111. a cam; 12. a rotating shaft; 121. a fourth groove;

2. a cylinder deactivation mechanism; 21. a first groove; 22. a second groove; 23. a third groove; 24. an electromagnetic valve; 241. a push rod; 242. a first return spring;

3. a reset mechanism; 31. a second return spring; 32. a first stopper;

4. a second stop.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Referring to fig. 1 and fig. 2, the present embodiment provides an engine cylinder start-stop device, which includes a control mechanism 1, a cylinder deactivation mechanism 2, and a reset mechanism 3, where the control mechanism 1 includes a shaft sleeve 11, the shaft sleeve 11 is sleeved on a rotating shaft 12 through a locking structure, the locking structure is configured to lock the shaft sleeve 11 along a circumferential direction of the rotating shaft 12, the shaft sleeve 11 is capable of rotating around an axis thereof along with the rotating shaft 12 and capable of axially sliding along the rotating shaft 12, a cam 111 is disposed on the shaft sleeve 11, an axis of the cam 111 is parallel to an axis of the shaft sleeve 11, the shaft sleeve 11 has a first working position at which the cam 111 can be aligned and abutted against a rocker arm (not shown in the figure) for opening or closing a valve of an engine cylinder, and a second working position after moving a preset distance along the axial direction of the rotating shaft 12, the preset distance is set to be greater than or equal to a width of the cam 111 along the axial direction of the shaft sleeve 11, the cylinder deactivation mechanism 2 is configured to switch the boss 11 from the first operation position to the second operation position, and the reset mechanism 3 is configured to reset the boss 11 from the second operation position to the first operation position.

In this embodiment, when the sleeve 11 is at the first operating position, the rocker arm can abut against the cam 111, the rocker arm can control the valve of the cylinder to open or close in the process that the cam 111 rotates around the axis of the rotating shaft 12 along with the sleeve 11, when the sleeve 11 is switched from the first operating position to the second operating position, the cam 111 and the rocker arm are dislocated, the cam 111 cannot abut against the rocker arm in the process that the cam 111 rotates around the axis of the rotating shaft 12 along with the sleeve 11, so as to lose control over the rocker arm, so that the rocker arm cannot control the valve of the cylinder, and the valve can be guaranteed to be always in a closed state when the engine is stopped.

Specifically, in this embodiment, when the cylinder is in the normal operation mode, the sleeve 11 is in the first operation position, the rocker arm can be opposite to and abut against the cam 111, and when the sleeve 11 rotates along with the rotating shaft 12, the cam 111 can drive the rocker arm to rotate around a rocker arm shaft (not shown in the figure), wherein the valve and the cam 111 are respectively located at two sides of the rocker arm shaft, and the rocker arm can control the valve to open or close under the drive of the cam 111. When the cylinder is in a cylinder deactivation mode, the cylinder deactivation mechanism 2 enables the shaft sleeve 11 to be switched from the first working position to the second working position, so that the cam 111 and the rocker arm are dislocated, when the shaft sleeve 11 rotates along with the rotating shaft 12, the rocker arm cannot be abutted to the cam 111, the rocker arm cannot control the valve to be switched between opening and closing, the control valve is kept in a normally closed state, when the cylinder restores to a normal working mode, the reset mechanism 3 enables the shaft sleeve 11 to restore to the first working position, the rocker arm can be aligned to the cam 111 again and abutted to the cam 111, and therefore the valve can be controlled to be switched between opening and closing again.

Preferably, the cylinder deactivation mechanism 2 in this embodiment includes a first groove 21, a second groove 22, a third groove 23 and a push rod 241, the first groove 21, the second groove 22 and the third groove 23 are all opened on the shaft sleeve 11, the first groove 21 and the second groove 22 both extend along the circumferential direction of the shaft sleeve 11 and are arranged at intervals along the axial direction of the shaft sleeve 11, the distance between the first groove 21 and the second groove 22 is greater than or equal to the width of the cam 111 along the axial direction of the shaft sleeve 11, the first groove 21 and the second groove 22 are communicated through the third groove 23, the push rod 241 is fixedly arranged in a plane perpendicular to the central line thereof, the push rod 241 has a first working state far away from the shaft sleeve 11 and a second working state capable of extending into the first groove 21, when the shaft sleeve 11 rotates around the axis thereof along with the rotating shaft 12, the push rod 241 in the second working state can slide into the second groove 22 through the third groove 23, that is, when the shaft sleeve 11 is located at the first working position, the push rod 241 is opposite to the first groove 21, the push rod 241 in this embodiment can move along the radial direction of the shaft sleeve 11 to extend into the first groove 21, when the shaft sleeve 11 rotates along with the rotating shaft 12, the push rod 241 can relatively slide in the first groove 21 until being aligned with the joint of the first groove 21 and the third groove 23, the push rod 241 can slide into the third groove 23 from the joint of the first groove 21 and the third groove 23 and relatively slide in the third groove 23, meanwhile, the push rod 241 can make the shaft sleeve 11 slide from the first working position to the second working position along the axial direction of the rotating shaft 12 in a manner of pushing against the side wall of the third groove 23, and when the push rod 241 slides into the second groove 22 from the joint of the third groove 23 and the second groove 22, the shaft sleeve 11 is located at the second working position. When the cylinder returns to the normal operation mode, the push rod 241 moves out of the second groove 22, and the reset mechanism 3 resets the shaft sleeve 11 from the second operation position to the first operation position.

It is understood that the shaft sleeve 11 in this embodiment is provided with two cams 111, one of the cams 111 is used for controlling an intake valve, and the other cam 111 is used for controlling an exhaust valve, and the first groove 21, the second groove 22 and the third groove 23 in this embodiment are all disposed on a side of one of the two cams 111 away from the other one of the two cams 111, but of course, in other alternative embodiments, the first groove 21, the second groove 22 and the third groove 23 may all be disposed between the two cams 111, which is not particularly limited in this embodiment.

Further, in the present embodiment, the groove bottom of the third groove 23 extends into the first groove 21, the depth of the groove bottom of the third groove 23 extending into the first groove 21 is greater than the depth of the first groove 21, the end of the push rod 241 can be attached to the groove bottom of the third groove 23 extending into the first groove 21, that is, the radial stroke of the push rod 241 along the shaft sleeve 11 is greater than the distance between the push rod 241 in the first working state and the groove bottom of the third groove 23 extending into the first groove 21 along the radial direction of the shaft sleeve 11, when the push rod 241 relatively slides in the first groove 21 to the junction of the first groove 21 and the third groove 23, the end of the push rod 241 is attached to the groove bottom of the third groove 23 extending into the first groove 21, because the depth of the groove bottom of the third groove 23 extending into the first groove 21 is greater than the depth of the first groove 21, the end of the push rod 241 can be abutted to the side wall of the junction of the first groove 21 and the third groove 23, thereby ensuring that the push rod 241 can slide into the third groove 23 and slide relative to the third groove 23 without continuing to slide relative to the first groove 21.

Based on the above, in the present embodiment, the depth of the junction between the third groove 23 and the second groove 22 is smaller than the depth of the second groove 22, and the radial stroke of the push rod 241 along the shaft sleeve 11 is greater than the distance between the deepest part of the push rod 241 and the third groove 23 in the first working state along the radial direction of the shaft sleeve 11, wherein in the present embodiment, the depth of the third groove 23 gradually increases from the junction between the third groove 23 and the first groove 21 to the junction between the third groove 23 and the second groove 22, that is, the deepest part of the third groove 23 is located at the junction between the third groove 23 and the second groove 22, but in other alternative embodiments, the depth of the third groove 23 may be set to be equal to the depth of the junction between the third groove 23 and the first groove 21, which is not particularly limited in the present embodiment. Because the radial stroke of the push rod 241 along the shaft sleeve 11 is greater than the radial distance between the deepest part of the push rod 241 and the third groove 23 in the first working state along the shaft sleeve 11, and the depth of the joint of the third groove 23 and the second groove 22 is less than that of the second groove 22, after the push rod 241 slides into the second groove 22, the push rod 241 can be abutted against the side wall of the joint of the second groove 22 and the third groove 23, and cannot slide into the third groove 23 from the second groove 22.

Further, the rocker arm and the push rod 241 in the present embodiment are spaced apart from each other in the axial direction of the bushing 11, and the projection of the third groove 23 in the axial direction of the bushing 11 does not overlap with the projection of the cam 111 in the axial direction of the bushing 11, that is, when the push rod 241 extends into the third groove 23 and slides relative to the third groove 23, the rocker arm abuts against the cylindrical surface of the bushing 11 and does not abut against the cam 111, so as to avoid blocking the bushing 11 from moving in the axial direction thereof due to the large friction generated between the rocker arm and the cam 111.

In the present embodiment, the engine cylinder start-stop device preferably includes a solenoid valve 24, and the push rod 241 is a valve core of the solenoid valve 24, when the solenoid valve 24 is energized, the valve core can be switched from the first operating state to the second operating state, and when the solenoid valve 24 is de-energized, the valve core can be switched from the second operating state to the first operating state. Compared with a special driving structure for driving the independent rod to move along the radial direction of the shaft sleeve 11, the mode of moving the shaft sleeve 11 along the axial direction of the rotating shaft 12 through the electromagnetic valve 24 in this embodiment is simple in structure.

In order to ensure that the valve core can be switched from the second working state to the first working state when the electromagnetic valve 24 is powered off, the electromagnetic valve 24 is provided with a first return spring 242, the first return spring 242 can be elastically deformed when the valve core is switched from the first working state to the second working state so as to have elastic potential energy for restoring the valve core to the first working state when the electromagnetic valve 24 is powered off, namely, the first return spring 242 can be compressed when the valve core is switched from the first working state to the second working state, and when the electromagnetic valve 24 is powered off, the first return spring 242 is restored to be deformed so as to restore the valve core.

Preferably, the reset mechanism 3 in this embodiment includes a second reset spring 31 and a first stopper 32, the second reset spring 31 is connected or abutted between the first stopper 32 and the sleeve 11, when the sleeve 11 is switched from the first operating position to the second operating position, the second reset spring 31 can be elastically deformed to have an elastic potential to reset the sleeve 11 from the second operating position to the first operating position when the push rod 241 is in the first operating state, that is, when the electromagnetic valve 24 is de-energized, the push rod 241 returns to the first operating state, the push rod 241 releases the restriction on the sleeve 11, and the second reset spring 31 can reset the sleeve 11. It will be appreciated that the first stopper 32 can limit the movement of the sleeve 11 in the axial direction of the rotating shaft 12.

Further, the engine cylinder opens and stops device still includes second stopper 4, and second stopper 4 sets up in the one side that first stopper 32 was kept away from to axle sleeve 11, and axle sleeve 11 that is in first operating position can carry on spacingly with second stopper 4 butt, second stopper 4 to the axle sleeve 11 of the in-process that resets to cam 111 on the axle sleeve 11 after guaranteeing to reset can be accurately just right with the rocking arm.

In this embodiment, the locking structure preferably includes a boss and a fourth groove 121, the boss (not shown in the figure) and the fourth groove 121 both extend along the axial direction of the rotating shaft 12, the boss can be embedded in the fourth groove 121, the boss and the fourth groove 121 are alternatively disposed on the shaft sleeve 11 and the rotating shaft 12, in this embodiment, the boss is disposed on one side of the shaft sleeve 11 facing the rotating shaft 12, the fourth groove 121 is disposed on the rotating shaft 12, and the boss and the fourth groove 121 cooperate with each other to lock the shaft sleeve 11 along the circumferential direction of the rotating shaft 12.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations, and substitutions will occur to those skilled in the art without departing from the scope of the present invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An engine cylinder opens and stops device which characterized in that includes:

the control mechanism (1) comprises a shaft sleeve (11) which is sleeved on the rotating shaft (12) through a locking structure, the locking structure is configured to lock the sleeve (11) along the circumferential direction of the rotating shaft (12), the sleeve (11) can rotate around the axis thereof along with the rotating shaft (12), and can slide along the axial direction of the rotating shaft (12), a cam (111) is arranged on the shaft sleeve (11), the axis of the cam (111) is parallel to the axis of the shaft sleeve (11), the shaft sleeve (11) is provided with a first working position which enables the cam (111) to be opposite to and abutted against a rocker arm for opening or closing a valve of an engine cylinder, and a second working position which moves for a preset distance along the axial direction of the rotating shaft (12), the preset distance is set to be greater than or equal to the width of the cam (111) in the axial direction of the sleeve (11);

a cylinder deactivation mechanism (2) configured to switch the bushing (11) from the first operating position to the second operating position; and

a resetting mechanism (3) configured to reset the bushing (11) from the second working position to the first working position.

2. The engine cylinder starting and stopping device according to claim 1, characterized in that the cylinder deactivation mechanism (2) comprises a first groove (21), a second groove (22), a third groove (23) and a push rod (241), the first groove (21), the second groove (22) and the third groove (23) are all arranged on the shaft sleeve (11), the first groove (21) and the second groove (22) both extend along the circumferential direction of the shaft sleeve (11) and are arranged at intervals along the axial direction of the shaft sleeve (11), the distance between the first groove (21) and the second groove (22) is larger than or equal to the axial width of the cam (111) along the shaft sleeve (11), the first groove (21) and the second groove (22) are communicated through the third groove (23), and the push rod (241) is fixedly arranged in a plane perpendicular to the center line thereof, the push rod (241) has a first working state far away from the shaft sleeve (11) and a second working state capable of extending into the first groove (21), and when the shaft sleeve (11) rotates around the axis of the rotating shaft (12) along with the rotating shaft, the push rod (241) in the second working state can slide into the second groove (22) through the third groove (23).

3. Engine cylinder start stop arrangement according to claim 2, characterized in that the groove bottom of the third groove (23) extends into the first groove (21), the groove bottom of the third groove (23) extending into the first groove (21) having a depth which is larger than the depth of the first groove (21), the end of the push rod (241) being able to abut the groove bottom of the third groove (23) extending into the first groove (21).

4. An engine cylinder start-stop arrangement according to claim 3, characterized in that the depth of the intersection of the third groove (23) and the second groove (22) is smaller than the depth of the second groove (22), and the stroke of the push rod (241) in the radial direction of the shaft sleeve (11) is larger than the distance of the deepest part of the push rod (241) and the third groove (23) in the first working state in the radial direction of the shaft sleeve (11).

5. The engine cylinder starting and stopping device according to claim 2, characterized in that the rocker arm and the push rod (241) are arranged at intervals along the axial direction of the shaft sleeve (11), and the projection of the third groove (23) in the axial direction of the shaft sleeve (11) is not overlapped with the projection of the cam (111) in the axial direction of the shaft sleeve (11).

6. Engine cylinder start-stop arrangement according to claim 2, characterized in that the engine cylinder start-stop arrangement comprises a solenoid valve (24), the push rod (241) being a spool of the solenoid valve (24).

7. Engine cylinder start-stop arrangement according to claim 6, characterized in that the solenoid valve (24) is provided with a first return spring (242), the first return spring (242) being elastically deformable when the spool is switched from the first operating state to the second operating state, to have an elastic potential that restores the spool to the first operating state when the solenoid valve (24) is de-energized.

8. The engine cylinder starting and stopping device according to claim 2, characterized in that the return mechanism (3) comprises a second return spring (31) and a first stop (32), the second return spring (31) is connected or abutted between the first stop (32) and the sleeve (11), and when the sleeve (11) is switched from the first working position to the second working position, the second return spring (31) can be elastically deformed to have elastic potential energy for returning the sleeve (11) from the second working position to the first working position when the push rod (241) is in the first working state.

9. An engine cylinder start-stop arrangement according to claim 8, characterized in that the engine cylinder start-stop arrangement further comprises a second stop (4), the second stop (4) being arranged on a side of the sleeve (11) remote from the first stop (32), the sleeve (11) in the first working position being capable of abutting against the second stop (4).

10. The engine cylinder starting and stopping device according to claim 1, characterized in that the locking structure comprises a boss and a fourth groove (121), the boss and the fourth groove (121) both extend along the axial direction of the rotating shaft (12), the boss can be embedded in the fourth groove (121), and the boss and the fourth groove (121) are alternatively arranged on the shaft sleeve (11) and the rotating shaft (12).