CN114439567B

CN114439567B - Engine valve rocker arm assembly with cylinder deactivation function

Info

Publication number: CN114439567B
Application number: CN202210101062.6A
Authority: CN
Inventors: 姚淇元
Original assignee: Zhejiang Yutai Seiko Co ltd
Current assignee: Zhejiang Yutai Seiko Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2023-04-18
Anticipated expiration: 2042-01-27
Also published as: CN114439567A

Abstract

The invention provides an engine valve rocker arm assembly with a cylinder deactivation function, and belongs to the technical field of engine assemblies. The engine valve solves the problem that the valve on the existing engine with the cylinder deactivation function is seriously abraded. The engine comprises a valve, the valve rocker assembly comprises a rocker, the lower part of one end of the rocker is provided with a mounting hole with a downward opening, a movable part is inserted in the mounting hole in a sliding manner and can be downwards abutted against the top of the valve when the movable part extends out of the mounting hole, the rocker is provided with a driving structure capable of driving the movable part to stretch out and draw back, and a limiting mechanism capable of locking the movable part when the movable part extends out of the mounting hole and is abutted against the valve is further arranged between the rocker and the movable part. When the piston retracts into the mounting hole, the piston is disengaged from the valve, and a certain distance is reserved between the piston and the valve, so that the rocker arm swings and cannot contact the valve, the design reduces the abrasion of the valve, and the service life of the valve is prolonged.

Description

Engine valve rocker arm assembly with cylinder deactivation function

Technical Field

The invention belongs to the technical field of engine assemblies, relates to a valve rocker assembly, and particularly relates to an engine valve rocker assembly with a cylinder deactivation function.

Background

At present, the engine for vehicles and engineering machinery is a multi-cylinder engine with 4-6 cylinders, in order to meet the maximum power requirement of the vehicles and the engineering machinery, the power of the engine is continuously increased, the multi-cylinder engine has the function that a plurality of cylinders can share load when the vehicles are in full load or overload operation, but when the vehicles are in no load or light load and the engineering machinery is in low load operation, all the cylinders work simultaneously, the single-cylinder load rate is reduced, although the load rate is lower, each cylinder of the engine drives a crankshaft to rotate in normal operation, so the oil consumption is still very high, namely the fuel consumption is high. And the problems of poor engine emission, carbon deposition in the cylinder and the like caused by insufficient fuel oil combustion in each cylinder due to low load factor can not be met.

Later, someone adopts the scheme of improving the discharge capacity and reducing the cylinder to design the engine, but such design can lead to the maximum power decline of engine, and it can lead to the driving system of whole car to be unbalanced to reduce the cylinder moreover, can take place the circumstances such as shake after the time of a specified duration and influence the driving feeling, and the engine saving of the normal cylinder is not had in the promotion of discharge capacity fuel efficiency under the condition of high load simultaneously, and above design also does not have fine application prospect. One can also achieve fuel saving by controlling the oil output of the oil injection nozzle in each cylinder, so that for a four-cylinder fuel engine, for example, when the engine is in a low load state, three cylinders all work normally, and when one cylinder stops injecting oil, the other three cylinders also work to drive the engine to operate normally. However, according to experiments, the valve in such a state is easy to damage, mainly because the oil nozzle does not work, the parts of the valve still work normally, the valve without thermal reaction continuously and dryly rubs with the air outlet channel, and is easy to wear, and the rocker arm drives the valve of the cavity to do work, so that the work of pistons in other cylinders is also influenced.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides an engine valve rocker arm assembly with a cylinder deactivation function. The engine solves the technical problem that the valve on the existing engine with the cylinder deactivation function is seriously abraded.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides an engine valve rocker arm assembly of area deactivation jar function, the engine includes the valve, valve rocker arm assembly includes the rocking arm, its characterized in that, the mounting hole of opening down is seted up to the lower part of rocking arm one end, it has the movable part to slide the grafting in the mounting hole, and can support downwards when the movable part stretches out the mounting hole and lean on at spiracular top, be equipped with the flexible drive structure of movable part that can drive on the rocking arm, still be equipped with between rocking arm and movable part and stretch out the mounting hole and with the valve counterbalance when leaning on with the movable part can be with the stop gear of movable part locking.

The valve rocker assembly comprises a rocker and a valve, the rocker and the valve are generally abutted together, and therefore the valve can be driven to move up and down to achieve the purpose of exhausting in an engine cylinder when the rocker swings. The side direction of the end part of the rocker arm in the valve rocker arm assembly is provided with a telescopic movable part, the movable part is in an extension state when the engine works normally, the extension movable part is propped against the valve, and the valve can be pressed down along with the swing movable part of the rocker arm; when the engine needs to reduce part of cylinders to operate in the operation process, the movable part can be controlled to contract by the driving structure, the rocker arm swings downwards, the movable part cannot contact with the valve, the movable part is separated from the valve, the valve is kept in a static state, the swing of the rocker arm cannot drive the valve to move, the oil injection stopping in the cylinder is controlled, so that parts of a cavity of the cylinder deactivation are all in a relative static state, the design does not interfere normal operation of other cylinders, the valve in the cylinder of the cylinder deactivation can be guaranteed to be prevented from being worn dry, and the service life is prolonged.

The limiting structure is arranged between the movable part and the rocker arm, when the movable part extends, the limiting structure can enable the movable part to keep an extending state, the position of the movable part is locked, the phenomenon that the valve is not normally driven to move downwards to influence the work of the engine due to the fact that the movable part contracts due to large reaction force in the process of driving the valve to move repeatedly is prevented, the limiting structure can fix the position of the piston cylinder sleeve after the piston cylinder sleeve is pressed on the valve, and the stability of the engine in the two modes of cylinder deactivation and normal operation is improved. The limiting structure is controlled to be released through the driving structure, the driving structure can release the limiting of the limiting structure on the movable part and can also control the movable part to retract, so that the normal operation of the engine is guaranteed, meanwhile, the cylinder of the engine can be stopped at will to reduce the power of the engine during operation, the design structure is ingenious, the valve in the cylinder for stopping the engine is in a relatively static state, dry grinding along with the swinging of the rocker arm is avoided, and the service life is greatly prolonged.

In the engine valve rocker arm assembly with the cylinder deactivation function, the movable part is a piston cylinder sleeve, the piston cylinder sleeve is arranged in the mounting hole in a sliding mode, and the piston cylinder sleeve and the mounting hole are circumferentially sealed.

The piston cylinder sleeve is installed in the mounting hole, and the piston cylinder sleeve can slide along the mounting hole direction, and the inner wall that has the mounting hole can carry out the spacing to the periphery of piston cylinder sleeve and can make the motion of piston cylinder sleeve become very stable to the jar that stops of messenger whole engine becomes very stable.

In the engine valve rocker arm assembly with the cylinder deactivation function, the piston cylinder sleeve is of a cylindrical structure with one end sealed and the other end open, and when the piston cylinder sleeve extends out of the mounting hole, the sealed end of the piston cylinder sleeve is pressed on the valve.

In foretell engine valve rocker arm assembly of area jar function of stopping, drive structure is including seting up the oil circuit in the rocking arm, the export of oil circuit is located the mounting hole lateral wall of piston cylinder liner upside, the inner wall circumference of piston cylinder liner and mounting hole is sealed, when the oil circuit is towards the downthehole oiling of mounting hole the piston cylinder liner can slide outside the mounting hole, and when the oil circuit unloads oil the piston cylinder liner can slide in the mounting hole.

When the oil circuit gets into high-pressure fluid, the fluid of oil circuit enters into the mounting hole and supports outside the ejecting mounting hole of whole piston cylinder liner and valve and lean on, when the oil circuit oil discharge, because circumference is sealed between the inner wall of piston cylinder liner and mounting hole, so the piston cylinder liner can be inhaled back in the mounting hole when the fluid in the oil circuit is taken out, let piston cylinder liner and valve separately cooperate can not along with the swing of rocking arm and contact each other, such control mode is very convenient operation, and the valve in the cylinder of valve deactivation after the deactivation of cylinder disengages with the rocking arm, the phenomenon of dry friction has been avoided, service life obtains further promotion.

In the engine valve rocker arm assembly with the cylinder deactivation function, the driving structure comprises a screw rod arranged in the mounting hole in a penetrating manner, the end part of the screw rod is fixed with the piston cylinder sleeve, the screw rod is in threaded connection with the rocker arm, a motor capable of driving the screw rod to rotate is arranged on the rocker arm, and the piston cylinder sleeve is driven by the screw rod to extend out of the mounting hole or retract into the mounting hole.

The piston cylinder sleeve is driven to stretch by a screw rod, the screw rod is in threaded connection with the rocker arm, the effect of extending out of the mounting hole or retracting into the mounting hole can be achieved by the rotation of the screw rod, the cylinder stop of an engine can be achieved, and the technical effect which is the same as that of the scheme is achieved.

In foretell engine valve rocker arm assembly of area deactivation jar function, limit structure includes the stud, the pilot hole has been seted up on the inner wall of mounting hole, the stud is located the pilot hole inboard and the stud can follow the pilot hole direction and slide, be provided with the spring in the pilot hole, spring one end supports and leans on the stud, the other end of spring supports and leans on the inner wall of pilot hole, the locating hole has been seted up on the piston cylinder sleeve, when the locating hole just right with the pilot hole in the sliding process outside the mounting hole of piston cylinder sleeve, the stud inserts in the locating hole under the promotion of spring, the oil circuit includes main road and branch road that communicate each other, the export of main road is located the mounting hole inner wall of piston cylinder sleeve upside, the branch road communicates with the pilot hole, the export inboard of main road is installed and is forbidden the check valve that the interior fluid of mounting hole enters into the main road, and the fluid in the piston cylinder sleeve can promote the stud to reset and from branch road department backward flow when the oil circuit.

When the piston cylinder cover slowly stretches out the mounting hole under the promotion of fluid outside, the position of the locating hole on the piston cylinder liner can just right with the position of pilot hole, and the post bolt that is located the pilot hole like this can stretch into in the locating hole under the promotion of spring force, and the post bolt wears to establish like this and can play fine supporting role to the piston cylinder liner between pilot hole and the locating hole, can effectual antagonism piston cylinder liner drive the valve and move down the anti-effect that produces often for engine normal operating is very stable.

When the piston cylinder sleeve needs to retract, the oil way discharges oil, pressure difference occurs between oil in the mounting hole and oil between the oil way, the check valve is arranged on the main path, oil can be injected into the mounting hole only, and oil can not be discharged, so the oil can only flow back from the branch to push the plunger to reset, after the plunger is jacked open, the piston cylinder sleeve can move upwards until the mounting hole and the mounting hole are completely staggered and sealed, and oil discharge is finished, the piston cylinder sleeve and the valve are matched separately, the design is ingenious, the operation is very convenient, and the abrasion of parts such as the valve can be reduced when each cylinder body of the engine is in a stable working state in the cylinder stopping process.

In the engine valve rocker arm assembly with the cylinder deactivation function, the inner wall of the assembly hole is provided with the stroke groove communicated with the branch, the peripheral surface of the stud is circumferentially attached to the inner side surface of the assembly hole, and when the stud slides into the assembly hole and is separated from the positioning hole, the positioning hole is communicated with the branch through the stroke groove.

Because the stud is the circumference laminating with the pilot hole, fluid can drive the stud when unloading oil and reset to slide but during fluid does not go out and enters into the branch road, the seting up of stroke groove is mainly used for fluid to enter into the branch road in, stroke groove and branch road are the intercommunication, the stroke groove can expose after the stud resets then fluid can enter into the stroke inslot and enter into the branch road from exposing the department, enter into the main road backward flow from the branch road again, the spacing contact to the piston cylinder liner has been realized when unloading in this design, two design two effect structural design of an oil circuit are ingenious very convenient to use, and also very stable.

In the engine valve rocker arm assembly with the cylinder deactivation function, the cross section of the positioning hole is square and is distributed along the circumferential direction of the piston cylinder sleeve.

The design of square locating hole can prevent that the piston cylinder liner from making the position of locating hole and the position of post bolt not correspond because the rotation, and the span of locating hole on the outer peripheral face of piston cylinder liner is great, even the piston cylinder liner takes place to rotate a little the post bolt can both block in the piston cylinder cover for resume the cooperation between rocking arm and the valve, engine normal operating.

In the engine valve rocker arm assembly with the cylinder deactivation function, a raised convex part is arranged at the closed end of the piston cylinder sleeve, the end part of the convex part is spherical, and an inner groove matched with the convex part is formed in the end part of the valve.

Compared with the prior art, the product has the advantages that:

1. when the piston retracts into the mounting hole, the piston is disengaged from the valve, a certain distance is reserved between the piston and the valve, so that the rocker arm cannot swing to contact the valve, the rocker arm cannot swing to drive the valve to move up and down after disengagement, namely, the valve is kept in a static state, and meanwhile, the cylinder corresponding to the valve is controlled to stop oil injection, so that the design reduces the abrasion of the valve, and the service life of the valve is prolonged.

2. When the oil circuit got into high-pressure fluid, the fluid of oil circuit got into the mounting hole can support whole piston cylinder liner ejecting mounting hole outside and the valve by, stretches out the locating hole just right with the pilot hole when the piston cylinder liner, and this stud then stretches into in the locating hole under the promotion of spring, and with the unable removal of whole piston cylinder liner lock, can not take place to remove yet when follow-up piston cylinder liner atress, design like this and make the engine very stable of whole rocking arm and valve contact when normal work.

3. When the oil way is used for oil discharge, under the action of pressure difference, oil in the piston cylinder sleeve can enter the branch circuit from the assembly hole and then enter the oil way for backflow, the stud is pushed to completely extend into the positioning hole during backflow, the piston cylinder sleeve is unlocked, and the piston cylinder sleeve enters the mounting hole again along with oil discharge and does not contact with the valve, so that the whole engine enters a cylinder deactivation state, components such as the valve and the like are kept relatively static, and the abrasion between the components and the cylinder wall is reduced.

Drawings

FIG. 1 is a schematic view in half section of the present invention;

FIG. 2 is an enlarged partial schematic view of the invention at A of FIG. 1;

FIG. 3 is a schematic front view of the piston liner of the present invention.

In the figure, 1, a valve; 11. an inner groove; 2. a rocker arm; 21. a movable portion; 22. mounting holes; 3. a limiting structure; 31. a stud; 32. a spring; 33. an assembly hole; 34. a stroke slot; 4. a drive structure; 41. an oil path; 411. a main road; 412. a branch circuit; 5. a piston cylinder liner; 51. positioning holes; 6. a one-way valve.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1-3, the engine includes a valve 1, the valve rocker assembly includes a rocker arm 2, a movable portion 21 capable of extending and retracting is disposed laterally at an end of the rocker arm 2, a limiting structure 3 capable of keeping the movable portion 21 in an extended state is disposed between the movable portion 21 and the rocker arm 2, the movable portion 21 can be pressed against the end of the valve 1 downward when the rocker arm 2 swings under the action of the limiting structure 3, and a driving structure 4 capable of releasing the limitation of the limiting structure 3 and driving the movable portion 21 to retract so as to separate the movable portion 21 from the valve 1 is further disposed on the rocker arm 2. The valve rocker assembly comprises a rocker 2 and a valve 1, the rocker 2 and the valve 1 are abutted together, and therefore the valve 1 can be driven to move up and down to achieve the purpose of exhausting in an engine cylinder when the rocker 2 swings. The side direction of the end part of the rocker arm 2 in the valve rocker arm assembly is provided with a telescopic movable part 21, the movable part 21 is in an extension state when the engine works normally, the extended movable part 21 is pressed on the valve 1, and the valve 1 can be pressed down along with the swing movable part 21 of the rocker arm 2; when the output of the cylinder needs to be reduced when the engine runs, the movable part 21 is controlled by the driving structure 4 to contract and is separated from the valve 1, the rocker arm 2 swings downwards, the movable part 21 cannot contact the valve 1, the valve 1 is kept in a static state, the swing of the rocker arm 2 cannot drive the valve 1 to move, the oil injection is controlled to stop in the cylinder, so that parts of a cavity of the cylinder deactivation are all in a static state, dry grinding is avoided, stable engine cylinder deactivation is realized, and the service life of the parts in the cylinder is prolonged. The limiting structure 3 is further arranged between the movable portion 21 and the rocker arm 2, when the movable portion 21 extends, the limiting structure 3 can enable the movable portion 21 to keep an extending state, the position of the movable portion 21 is locked, the situation that the movable portion 21 cannot normally drive the valve 1 to move downwards due to the fact that the movable portion 21 contracts due to large reaction force in the process that the rocker arm 2 drives the valve 1 to move repeatedly and the working of an engine is affected is prevented, the limiting structure 3 can fix the position of the piston cylinder sleeve 5 after the piston cylinder sleeve 5 is pressed on the valve 1, and the stability of the engine in the two modes of cylinder deactivation and normal operation is improved. And limit structure 3 also comes control to remove through drive structure 4, and drive structure 4 can remove limit structure 3 and also can control movable part 21 withdrawal simultaneously to movable part 21 spacing, and design structure is ingenious like this, and the effectual wearing and tearing that reduce parts such as valve have improved valve's life, and it is very convenient and stable to use moreover.

The movable part 21 is a piston cylinder sleeve 5, a mounting hole 22 is formed in the side direction of the end part of the rocker arm 2, and the piston cylinder sleeve 5 is located in the mounting hole 22 and can slide along the mounting hole 22 in a guiding mode. The piston cylinder sleeve 5 is of a cylindrical structure with one closed end and the other open end, and the closed end of the piston cylinder sleeve 5 extends out of the mounting hole 22 and is low-pressure on the valve 1. The closed end of the piston cylinder liner 5 is provided with a convex protrusion 52, the end of the protrusion 52 is spherical, and the end of the valve 1 is provided with an inner groove 11 matched with the protrusion 52. The piston cylinder sleeve 5 is installed in the installation hole 22, the piston cylinder sleeve 5 can slide along the installation hole 22 in a guiding mode, the inner wall with the installation hole 22 can limit the periphery of the piston cylinder sleeve 5, and the motion of the piston cylinder sleeve 5 can be enabled to be stable, so that the cylinder stopping of the whole engine is enabled to be stable, abrasion of components such as an air valve and the like due to idling is further reduced, and the service life of the engine is greatly prolonged.

The specific structure of the driving structure 4 includes an oil path 41 formed in the rocker arm 2, the oil path 41 is communicated with the mounting hole 22, the piston cylinder sleeve 5 is circumferentially sealed with the inner wall of the mounting hole 22, the piston cylinder sleeve 5 can slide outward of the mounting hole 22 when the oil path 41 is filled with oil into the mounting hole 22, and the piston cylinder sleeve 5 can slide inward of the mounting hole 22 when the oil path 41 is drained of oil. When oil circuit 41 gets into high-pressure fluid, oil of oil circuit 41 enters into inside the mounting hole 22 and supports whole piston cylinder liner 5 outside the ejecting mounting hole 22 with valve 1 and lean on, when oil circuit 41 unloads oil, because circumferential seal between the inner wall of piston cylinder liner 5 and mounting hole 22, so in the piston cylinder liner 5 can be inhaled back to the mounting hole 22 when oil in oil circuit 41 is taken out, let piston cylinder liner 5 and valve 1 separately cooperate can not be along with the swing of rocking arm 2 and contact each other, make whole engine get into stable jar state of stopping, let parts such as valve keep quiescent condition not with rocking arm synchronous oscillation, abrasion is reduced.

The concrete structure of the limiting structure 3 comprises a stud 31, an assembly hole 33 has been opened on the inner wall of the mounting hole 22, the stud 31 is located inside the assembly hole 33, and the stud 31 can slide along the guide of the assembly hole 33, a spring 32 is arranged in the assembly hole 33, one end of the spring 32 abuts against the stud 31, the other end of the spring 32 abuts against the inner wall of the assembly hole 33, a positioning hole 51 is opened on the piston cylinder sleeve 5, when the positioning hole 51 and the assembly hole 33 are right aligned in the sliding process of the piston cylinder sleeve 5 towards the outside of the mounting hole 22, the stud 31 is inserted into the positioning hole 51 under the pushing of the spring 32, the oil path 41 comprises a main path 411 and a branch path 412 which are mutually communicated, the main path 411 is communicated with the mounting hole 22, the branch path 412 is communicated with the assembly hole 33, a check valve 6 is installed on the inner side of the main path 411, the check valve 6 is composed of a spherical plug and a disc spring, the disc spring can support the plug against the inner side of the hole, and high-pressure oil can enter the mounting hole 22. When the oil path 41 is drained, the oil can push the stud 31 to reset and drain from the branch 412. When the piston cylinder sleeve 5 slowly stretches out of the mounting hole 22 under the promotion of fluid, the position of the locating hole 51 on the piston cylinder sleeve 5 can be just right with the position of the assembly hole 33, the stud 31 that is located in the assembly hole 33 can stretch into the locating hole 51 under the promotion of spring 32 elasticity like this, the stud 31 wears to establish like this and can play fine supporting role to the piston cylinder sleeve 5 between assembly hole 33 and the locating hole 51, can effectually confront the reaction that the piston cylinder sleeve 5 produced when driving the valve 1 to move down, make the engine normal operating very stable. When the piston cylinder sleeve 5 needs to retract, the resetting of the plunger 31 is controlled through oil discharging of the oil way 41, the main way 411 of the oil way 41 is communicated with the mounting hole 22, the one-way valve 6 arranged on the main way 411 can only inject oil into the mounting hole 22 and cannot discharge the oil, so that the oil can only be drained from the branch 412 to the return oil way 41 again, the plunger 31 can be pushed open by pressure difference during oil discharging to enter the assembly hole 33 and then return from the branch 412, when the plunger 31 is pushed open, the piston cylinder sleeve 5 can move upwards until the mounting hole 22 and the assembly hole 33 are completely staggered and sealed, the oil discharging is finished, and the piston cylinder sleeve 5 is separately matched with the valve 1. The inner wall of the assembly hole 33 is provided with a stroke groove 34 communicated with the branch 412, the outer circumferential surface of the stud 31 is circumferentially attached to the inner side surface of the assembly hole 33, and the stud 31 can slide towards the assembly hole 33 to expose part of the stroke groove 34. Because the stud 31 is circumferentially attached to the assembly hole 33, oil can drive the stud 31 to reset and slide when oil is discharged, but oil does not enter the branch 412, the stroke groove 34 is mainly formed for the oil to enter the branch 412, the stroke groove 34 is communicated with the branch 412, after the stud 31 is reset, the stroke groove 34 is exposed, the oil can enter the stroke groove 34 from the exposed part and enter the branch 412 to be discharged, the design realizes limiting contact on the piston cylinder sleeve 5 when oil is discharged, and two designed functions of one oil path 41 are very convenient to use and are also very stable. The outline of the positioning hole 51 is square and distributed along the circumference of the piston cylinder sleeve 5. The design of square locating hole 51 can prevent that piston cylinder liner 5 from making the position of locating hole 51 and the position of stud 31 not corresponding owing to rotatory, and the span of locating hole 51 on the outer peripheral face of piston cylinder liner 5 is great, even piston cylinder liner 5 takes place to rotate a little stud 31 and can both block in the piston cylinder liner 5 for resume the cooperation between rocking arm 2 and the valve 1, engine normal operating.

Example two

This is the second technical scheme of this scheme, and other structures in this scheme are all the same with above-mentioned scheme, and the difference of this scheme lies in that drive structure 4 includes the lead screw of wearing to establish in mounting hole 22, and the tip of lead screw is fixed with piston cylinder liner 5, and threaded connection is equipped with on rocking arm 2 and can drive lead screw pivoted motor between lead screw and the rocking arm 2, and piston cylinder liner 5 passes through the lead screw drive and stretches out the mounting hole 22 outward or retract in the mounting hole 22. The piston cylinder sleeve 5 is driven to stretch by a screw rod, the screw rod is in threaded connection with the rocker arm 2, the effect of extending out of the mounting hole 22 or retracting into the mounting hole 22 can be achieved by the rotation of the screw rod, cylinder stopping of the engine can be achieved, and the technical effect the same as that of the scheme is achieved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. An engine valve rocker assembly with a cylinder deactivation function comprises a valve (1), the valve rocker assembly comprises a rocker (2), and the engine valve rocker assembly is characterized in that a mounting hole (22) with a downward opening is formed in the lower portion of one end of the rocker (2), a movable portion (21) is inserted in the mounting hole (22) in a sliding mode, the movable portion (21) can abut against the top of the valve (1) downwards when extending out of the mounting hole (22), a driving structure (4) capable of driving the movable portion (21) to stretch out and draw back is arranged on the rocker (2), and a limiting mechanism (3) capable of locking the movable portion (21) when the movable portion (21) extends out of the mounting hole (22) and abuts against the valve (1) is further arranged between the rocker (2) and the movable portion (21); the movable part (21) is a piston cylinder sleeve (5); the driving structure (4) comprises an oil path (41) arranged in the rocker arm (2); the limiting mechanism (3) comprises a stud (31), the inner wall of the mounting hole (22) is provided with an assembling hole (33), the stud (31) is positioned inside the assembly hole (33) and the stud (31) can slide along the assembly hole (33) in a guiding way, a spring (32) is arranged in the assembly hole (33), one end of the spring (32) is abutted against the stud (31), the other end of the spring (32) is abutted against the inner wall of the assembly hole (33), the piston cylinder sleeve (5) is provided with a positioning hole (51), when the positioning hole (51) is opposite to the assembling hole (33) in the sliding process of the piston cylinder sleeve (5) towards the outside of the mounting hole (22), the lower part of the stud (31) pushed by the spring (32) is inserted into the positioning hole (51), the oil passage (41) includes a main passage (411) and a branch passage (412) communicating with each other, the outlet of the main path (411) is positioned on the inner wall of the mounting hole (22) at the upper side of the piston cylinder sleeve (5), the branch (412) is communicated with the assembly hole (33), a one-way valve (6) which forbids oil liquid in the mounting hole (22) from entering the main path (411) is arranged on the inner side of the outlet of the main path (411), when the oil way (41) is unloaded, the oil in the piston cylinder sleeve (5) can push the stud (31) to reset and flow back from the branch (412).

2. The engine valve rocker assembly with cylinder deactivation function of claim 1, wherein the piston cylinder sleeve (5) is slidably disposed in the mounting hole (22) and the piston cylinder sleeve (5) is circumferentially sealed with the mounting hole (22).

3. The engine valve rocker assembly with the cylinder deactivation function according to claim 2, wherein the piston cylinder sleeve (5) is of a cylindrical structure with one closed end and the other open end, and when the piston cylinder sleeve (5) extends out of the mounting hole (22), the closed end of the piston cylinder sleeve (5) is pressed against the valve (1).

4. The engine valve rocker assembly with the cylinder deactivation function of claim 3, wherein the piston cylinder sleeve (5) is circumferentially sealed with the inner wall of the mounting hole (22), the piston cylinder sleeve (5) can slide outwards the mounting hole (22) when the oil path (41) is filled with oil towards the inside of the mounting hole (22), and the piston cylinder sleeve (5) can slide inwards the mounting hole (22) when the oil path (41) is drained of oil.

5. The engine valve rocker assembly with the cylinder deactivation function as claimed in claim 4, wherein a stroke groove (34) is formed in an inner wall of the assembly hole (33), an outer circumferential surface of the stud (31) is circumferentially attached to an inner side surface of the assembly hole (33), and when the stud (21) slides into the assembly hole (33) and is separated from the positioning hole (51), the positioning hole (51) is communicated with the branch (412) through the stroke groove (34).

6. The engine valve rocker arm assembly with cylinder deactivation function of claim 5, wherein the cross-sectional shape of the positioning hole (51) is square and distributed along the circumferential direction of the piston cylinder sleeve (5).

7. An engine valve rocker assembly with cylinder deactivation according to any of claims 3-6, characterized in that the closed end of the piston cylinder liner (5) is provided with a raised protrusion (52), the end of the protrusion (52) has a spherical shape, and the end of the valve (1) has an inner recess (11) cooperating with the protrusion (52).