CN114439566A

CN114439566A - Engine valve rocker arm assembly with cylinder deactivation function

Info

Publication number: CN114439566A
Application number: CN202210101014.7A
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: 2022-05-06
Anticipated expiration: 2042-01-27
Also published as: CN114439566B

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 problem that the service life of an existing valve of the self-cylinder-deactivation engine is short is solved. The engine comprises a valve, wherein a valve rocker assembly comprises a rocker arm, the end part of the rocker arm is connected with a telescopic movable part, a connecting piece is fixed on the movable part, an elastic piece capable of enabling the movable part to have a contraction trend is further arranged on the rocker arm, the connecting piece can downwards jack and press the top of the valve when the rocker arm swings under the action of the elastic piece, and a driving structure capable of driving the movable part to stretch out relative to the rocker arm to enable the connecting piece to be separated from the top of the valve in a staggered mode is further arranged on the rocker arm. Make originally under the drive structure drive to lean on with the valve connecting piece position change and the valve stagger, valve and connecting piece separately cooperate, reduce the friction between valve and the engine cylinder body at the deactivation of the jar in-process, by a wide margin improved the life of valve.

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 engines for vehicles and engineering machinery are multi-cylinder engines with 4-6 cylinders, in order to meet the maximum power requirement of the vehicles and the engineering machinery, the engine power is large, the multi-cylinder engines are used for enabling a plurality of cylinders to 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, and therefore the fuel consumption is still high (the discharged carbon dioxide 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 on, 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 unbalanced to reduce the cylinder moreover, and the condition such as can take place the shake for a long time influences the driving feeling, and the engine that does not have normal cylinder of fuel efficiency under the condition of high load of promotion of discharge capacity is practiced thrift 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, but all the parts of the valve still work normally, the valve without thermal reaction continuously and dryly rubs with the air outlet channel, and the valve is easy to wear.

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 technical problem that the service life of an existing valve of the self-cylinder-deactivation engine is short is solved.

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, rocking arm end connection has the movable part that can stretch out and draw back, be fixed with the connecting piece in the movable part, still be equipped with the elastic component that can make the movable part have the shrink trend on the rocking arm, and the connecting piece can roof pressure valve top downwards when the rocking arm swings under the effect of elastic component, still be equipped with on the rocking arm and drive the movable part and stretch out the drive structure who makes connecting piece and valve top dislocation separation relative to the rocking arm.

The valve rocker assembly comprises a rocker arm capable of swinging, and when the rocker arm swings, the valve can be driven to move downwards to open an engine exhaust passage for exhaust. The end of the rocker arm in the valve rocker arm assembly is provided with a telescopic movable part, a connecting piece is fixed on the movable part, the connecting piece is abutted against the valve to enable the rocker arm to swing to drive the valve to move downwards for exhausting, when the movable part extends under the driving of a driving structure, the connecting piece can be driven to move together to enable the connecting piece which is originally abutted against the valve to change in position and stagger with the valve, the valve and the connecting piece are separately matched, after the connecting piece is separately matched, the connecting piece can continue to swing up and down along with the rocker arm, the valve stops moving, the disengaging matching is suitable for an engine capable of automatically stopping a cylinder, one of the cylinder chambers of the engine stops oil injection, meanwhile, the valve rocker arm assembly is matched to enable the valve to stop moving, friction between the valve and an engine cylinder body is reduced in the cylinder stopping process, and the service life of the valve is greatly prolonged.

The movable part stretches to drive the connecting piece to be staggered with the valve, if the valve movement needs to be recovered after staggering, the movable part can automatically return under the elastic action of the elastic piece, the connecting piece can return to the upper part of the valve again along with the resetting of the movable part and can be propped against the valve again along with the swinging of the rocker arm and can drive the valve to move downwards, the design structure is very ingenious, the valve does not have external force to act on the connecting piece when not needing to move, the valve can recover the movement when needing to work, the idle movement time of the valve is greatly reduced, and the service life of the valve is further prolonged.

In the engine valve rocker arm assembly with the cylinder deactivation function, the movable part is a piston, the end part of the rocker arm is provided with a mounting hole, the piston is located in the mounting hole and can slide along the mounting hole in a guiding manner, one end of the piston extends out of the mounting hole, the connecting piece is fixed on the outer end part of the piston, the driving structure can drive the piston to slide out of the mounting hole, and the elastic piece can drive the piston to retract into the mounting hole.

The movable part of the design is a piston which is arranged on the rocker arm in a sliding mode, the connecting piece is fixed on the end part of the piston and can move along with the expansion and contraction of the piston, the piston is in an initial state when being contracted in the mounting hole, the connecting piece and the valve are in a mutual abutting state, the rocker arm swings to drive the valve to move together, and the state is a state of normally driving the rocker arm of the engine; when the piston extends out of the mounting hole, the piston is in a cylinder deactivation state, the connecting piece is matched with the valve in a staggered manner, and the valve cannot move along with the rocker arm; when the piston contracts again, the connecting piece is matched with the valve again for linkage, the state is the state of recovering the cylinder body after cylinder deactivation, the design is very ingenious, the valve keeps a relatively static state in the cylinder deactivation process of the engine, friction between the valve and the cylinder body of the engine is reduced, and the service life is greatly prolonged.

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, piston and mounting hole circumferential seal, one of them export of oil circuit is located the inner wall of mounting hole, when the oil circuit irritates oil towards the mounting hole in the piston roll-off in the mounting hole, and when the oil circuit unloads oil the piston can reset under the drive of elastic component.

The piston is arranged in the mounting hole in a sliding mode and is sealed with the mounting hole in the circumferential direction, the piston slides under hydraulic control, and the specific structure is that an oil way is formed in the rocker arm, an inlet of one end of the oil way is connected with an external oil pump, and an outlet of the other end of the oil way is located in the hole wall of the mounting hole. On the contrary, when the oil way is used for oil discharge, the piston can reset under the elastic action of the elastic piece, and the piston resetting connecting piece can be propped against the rocker arm again in the swinging process of the rocker arm to enable the piston to be matched with the valve again like a foot, so that the design and the operation are simple, and the piston is convenient and practical.

In the above engine valve rocker arm assembly with cylinder deactivation function, the driving structure includes a cylinder fixed on the rocker arm, the cylinder has a push rod, the push rod is fixed with the end of the piston and can drive the piston to move synchronously when the push rod extends out, the elastic member is fixed on the push rod of the cylinder and can drive the push rod of the cylinder to reset when the cylinder stops air intake.

The second technical scheme of the driving structure is that the connecting piece is driven to move through the air cylinder to be disengaged from the air valve, so that the connecting piece and the air valve can be separated in a staggered mode through the design, and the technical effect the same as that of the scheme can be achieved.

In the engine valve rocker arm assembly with the cylinder deactivation function, the piston is of a cylindrical structure with one open end and one closed end, the open end of the piston faces the mounting hole, the connecting piece is a piston elephant foot, and the piston elephant foot is fixed at the closed end of the piston.

The piston of tubular structure makes when fluid infuses in the mounting hole can enter into the piston like this can be stable drive piston slip when unloading oil, and the piston is laminated with mounting hole inner wall circumference moreover, makes the piston motion more stable like this.

In the engine valve rocker arm assembly with the cylinder deactivation function, the closed end of the piston is provided with the protruding connecting part, the connecting part is located outside the mounting hole, the elastic part is a return spring, one end of the return spring is connected to the connecting part, the other end of the return spring is connected to the rocker arm, and when the piston retracts into the mounting hole, the connecting part and the end part of the rocker arm form a stop.

The connecting part on the piston is mainly designed for mounting a return spring, the return spring can provide a back pushing force for the piston to enable the piston to return, the valve and the piston are matched with each other again, the whole engine is enabled to return to a normal operation state from a cylinder deactivation state, and the engine is very convenient to use.

In the engine valve rocker arm assembly with the cylinder deactivation function, the side part of the rocker arm is provided with the positioning part parallel to the connecting part, one end of the return spring is fixed with the connecting part, and the other end of the return spring is fixed with the positioning part.

In the above engine valve rocker arm assembly with cylinder deactivation function, the closed end of the piston is located outside the mounting hole and is provided with a convex part, and the piston elephant foot is fixed on the convex part.

In the engine valve rocker arm assembly with the cylinder deactivation function, the inlet of the oil path is positioned on the bottom wall of the mounting hole, and the piston can enable one end of the opening of the piston to cover the inlet of the oil path through movement.

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

1. the end part of the rocker arm in the valve rocker arm assembly is provided with the piston in a sliding manner, the piston is separated from the valve in a foot-like manner due to the sliding of the piston, and the valve cannot be driven to move up and down by the swinging of the rocker arm after the separation, namely the valve keeps a static state, so that the valve stops moving after one cylinder chamber of the engine stops oil injection, the friction between the valve and the cylinder body of the engine is reduced, and the service life of the valve is greatly prolonged.

2. The piston slides under the control of the oil way, the piston displaces to drive the piston elephant foot to be staggered with the air valve, the air valve does not have external force acting on the piston elephant foot when not needing to move, the piston resets to enable the piston elephant foot to be matched with the air valve when needing the air valve to work, the idle movement time of the air valve is greatly reduced by the design, and the service life of the air valve is further prolonged.

3. The driving structure pushes the piston to extend out through hydraulic pressure, and the specific structure is that an oil way is formed in the rocker arm, an inlet of one end of the oil way is connected with an external oil pump, and an outlet of the other end of the oil way is positioned in the hole wall of the mounting hole, so that when external high-pressure oil is injected into the mounting hole, the piston is pushed to extend out, the piston is separated from the valve in a foot-like manner, the valve stops working, and the service life of the valve is prolonged.

Drawings

FIG. 1 is a half sectional view of the present invention;

fig. 2 is a half sectional view of the piston of the present invention as it extends.

In the figure, 1, a rocker arm; 11. a movable portion; 12. mounting holes; 13. an oil path; 14. a positioning part; 2. an air valve; 3. a connecting member; 31. the piston is like a foot; 4. a piston; 41. a convex portion; 42. a connecting portion; 5. an elastic member; 51. a return spring; 6. a drive structure.

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 and 2, the engine valve rocker arm assembly with the cylinder deactivation function comprises a rocker arm 1 and a valve 2, wherein a mounting hole 12 is formed in one end portion of the rocker arm 1, the center line of the mounting hole 12 is perpendicular to the axis of the valve 2 when the rocker arm 1 is lifted, a piston 4 is slidably arranged inside the mounting hole 12, the piston 4 is of a cylindrical structure with one open end and one closed end, the open end of the piston 4 faces the inner wall of the mounting hole 12, the closed end of the piston 4 is located outside the mounting hole 12 and is provided with a convex portion 41, and a piston elephant foot 31 is fixed on the convex portion 41. The piston elephant foot 31 is provided with a through hole, the piston elephant foot 31 is positioned on the inner side of the through hole and is tightly matched and fixed with the inner wall of the through hole, and the end part of the convex part 41 is also provided with a clamp spring which can limit the axial movement of the piston elephant foot 31. The bottom of the piston elephant foot 31 is pressed on the valve 2 in a propping mode and can drive the valve 2 to displace through the swinging of the rocker arm 1, and a driving structure which can drive the piston 4 to slide out of the mounting hole 12 to enable the piston elephant foot 31 and the valve 2 to be staggered is arranged between the piston 4 and the rocker arm 1. The valve rocker assembly comprises a rocker arm 1 and a valve 2, the rocker arm 1 and the valve 2 are generally abutted together, and therefore the valve 2 can be driven to move up and down to achieve the purpose of exhausting in an engine cylinder chamber when the rocker arm 1 swings. The end part of the rocker arm 1 in the valve rocker arm assembly is provided with the piston 4 in a sliding manner, the end part of the piston 4 is fixed with the piston elephant foot 31, and the piston elephant foot 31 is pressed on the valve 2, so that the piston elephant foot 31 can be separated from the valve 2 through the sliding of the piston 4, the valve 2 cannot be driven to move up and down by the swinging of the rocker arm 1 after the separation, namely, the valve 2 keeps a static state, the separation and the matching are suitable for an engine capable of automatically stopping the cylinder, one cylinder chamber of the engine stops oil injection, and meanwhile, the valve 2 also stops moving by matching the valve rocker arm assembly, the friction between the valve 2 and the cylinder body of the engine is reduced, and the service life of the valve 2 is greatly prolonged. The piston 4 slides through the driving device, the sliding piston 4 of the driving structure displaces to drive the piston elephant foot 31 to be staggered with the valve 2, if the valve 2 needs to be recovered after staggering, the piston elephant foot 31 can be supported against the end part of the valve 2 again only by re-driving the piston 4 to return when the valve rocker arm 1 is lifted, so the design structure is very ingenious, the valve 2 does not have external force to act on the valve 2 when not needing to move, the power of the valve 2 can be recovered when the valve 2 needs to work, the idle movement time of the valve 2 is greatly reduced, and the service life of the valve 2 is further prolonged.

The driving structure comprises an oil path 13 arranged in the rocker arm 1, the outlet of the oil path 13 is positioned on the inner wall of the mounting hole 12, the inlet of the oil path 13 is opposite to the opening of the piston 4, the inlet of the oil path 13 is positioned on the hole wall of the central hole of the valve rocker arm 1, the piston 4 and the inner wall of the mounting hole 12 are circumferentially sealed, and when the oil path 13 passes through oil, the piston 4 can be pushed towards the direction of the hole opening of the mounting hole 12. The piston 4 can be moved so that its open end is covered outside the inlet of the oil passage 13. The driving structure pushes the piston 4 to extend through hydraulic pressure, and has the specific structure that an oil path 13 is opened in the rocker arm 1, an inlet at one end of the oil path 13 is connected with an external oil pump, and an outlet at the other end of the oil path 13 is positioned in the hole wall of the mounting hole 12, so that when external high-pressure oil is injected into the mounting hole 12, the piston 4 is pushed to extend to enable the piston to be separated from the valve 2 like the foot 31, the valve 2 stops working, and the service life of the valve 2 is prolonged. On the contrary, when the oil way 13 is used for oil discharging, the piston 4 is circumferentially sealed with the mounting hole 12, along with the pressure reduction in the oil flowing out of the mounting hole 12, the piston 4 can reset to enable the piston to be matched with the valve 2 again like the foot 31, and therefore the design and the operation are simple, and the valve is convenient and practical.

The side of the end of the piston 4 outside the mounting hole 12 is provided with a convex connecting part 42, a return spring 51 is arranged between the connecting part 42 and the rocker arm 1, and the return spring 51 can drive the piston 4 to retract into the mounting hole 12 when the oil path 13 is discharged. The connecting part 42 on the piston 4 is mainly designed for installing a return spring 51, so that the valve 2 and the piston elephant foot 31 are recombined together, the speed of the whole engine from cylinder deactivation to recovery is higher, and the use is very convenient. The side portion of the rocker arm 1 is provided with a positioning portion 14 parallel to the connecting portion 42, one end of a return spring 51 is fixed to the connecting portion 42, and the other end of the return spring 51 is fixed to the positioning portion 14.

The valve rocker assembly adopts an oil cylinder and an oil cylinder piston 4 hydraulic mechanism at the driving valve end, and the extension height of the piston 4 is controlled by a return spring 51 and pressure engine oil. When the engine runs at low load, high-pressure engine oil in the oil passage of the shaft of the rocker arm 1 enters the mounting hole 12 through the oil passage 13, the high-pressure engine oil presses the oil cylinder piston 4 to make the force greater than the pulling force of the return spring 51, the piston 4 extends outwards, the oil cylinder piston foot 31 leaves the contact surface of the valve or the valve 2 at the moment, the rocker arm 1 swings, and the valve is not controlled to be opened or closed by the rocker arm 1 any more. When the engine runs under high load, all cylinders participate in working, at the moment, high-pressure engine oil of the shaft of the rocker arm 1 is cut off, under the action of the return spring 51, the engine oil in the oil path 13 is pressed back to the oil path of the rocker arm 1 and the oil path of the shaft of the rocker arm 1, the piston elephant foot 31 of the oil cylinder returns to the original position and contacts with the valve or the valve 2, at the moment, the rocker arm 1 swings, and the valve is switched on and off in a follow-up mode, so that normal working is realized.

Example two

The second embodiment of the driving structure of the present disclosure is the same as the first embodiment, except that the other driving structure of the present disclosure includes a cylinder fixed on the rocker arm 1, and a push rod of the cylinder is connected to the connecting portion 42 on the piston, and the push rod of the cylinder can drive the piston 4 to reciprocate by moving. The piston 4 drives the piston 4 to reciprocate in a cylinder mode, so that the piston elephant foot 31 and the valve 2 can be separated in a staggered mode through the design, and the technical effect same as that of the scheme can be 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. The utility model provides an engine valve rocker assembly of area deactivation jar function, the engine includes valve (2), valve rocker assembly includes rocking arm (1), its characterized in that, rocking arm (1) end connection has flexible movable part (11), be fixed with connecting piece (3) on movable part (11), still be equipped with elastic component (5) that can make movable part (11) have the shrink trend on rocking arm (1), and connecting piece (3) can roof pressure valve (2) top downwards when rocking arm (1) swing under the effect of elastic component (5), still be equipped with on rocking arm (1) and drive movable part (11) relative rocking arm (1) and stretch out and make connecting piece (3) and valve (2) top dislocation separation's drive structure (6).

2. The engine valve rocker assembly with the cylinder deactivation function according to claim 1, wherein the movable portion (11) is a piston (4), a mounting hole (12) is formed in an end portion of the rocker arm (1), the piston (4) is located in the mounting hole (12) and can slide along the mounting hole (12) in a guiding manner, one end of the piston (4) extends out of the mounting hole (12) and the connecting piece (3) is fixed on an outer end portion of the piston (4), the driving structure (6) can drive the piston (4) to slide out of the mounting hole (12) and the elastic piece (5) can drive the piston (4) to retract into the mounting hole (12).

3. The engine valve rocker assembly with the cylinder deactivation function according to claim 2, wherein the driving structure (6) comprises an oil passage (13) formed in the rocker arm (1), the piston (4) is circumferentially sealed with the mounting hole (12), one of outlets of the oil passage (13) is located on the inner wall of the mounting hole (12), the piston (4) slides out of the mounting hole (12) when the oil passage (13) is filled into the mounting hole (12), and the piston (4) can be reset under the driving of the elastic piece (5) when the oil passage (13) is drained.

4. An engine valve rocker assembly with cylinder deactivation according to claim 2, characterized in that the actuating structure (6) comprises a cylinder fixed to the rocker (1), the cylinder having a push rod fixed to the end of the piston (4) and capable of driving the piston (4) to move synchronously when the push rod is extended, the elastic member (5) being fixed to the push rod of the cylinder and capable of driving the push rod of the cylinder to return when the cylinder stops charging.

5. An engine valve rocker assembly with cylinder deactivation function as claimed in claim 3, wherein said piston (4) is a cylindrical structure with one open end and one closed end, said open end of said piston (4) faces into said mounting hole (12), said connecting member (3) is a piston elephant foot (31), said piston elephant foot (31) is fixed on the side of the closed end of the piston (4).

6. An engine valve rocker assembly with cylinder deactivation according to claim 5, wherein the piston (4) is provided with a protrusion (41) at its closed end, the protrusion (41) protruding out of the mounting hole (12), and the piston elephant foot (31) is fixed to the protrusion (41).

7. An engine valve rocker assembly with cylinder deactivation function as claimed in claim 6, wherein the closed end of the piston (4) is provided with a raised connecting portion (42), the connecting portion (42) is located outside the mounting hole (12), the elastic member (5) is a return spring (51), one end of the return spring (51) is connected to the connecting portion (42), the other end of the return spring (51) is connected to the rocker arm (1), and the connecting portion (42) abuts against the end of the rocker arm (1) when the piston (4) retracts into the mounting hole (12).

8. An engine valve rocker assembly with cylinder deactivation function as claimed in claim 7, characterized in that the side of the rocker arm (1) is provided with a positioning portion (14) parallel to the connecting portion (42), one end of the return spring (5) is fixed to the connecting portion (42), and the other end of the return spring (5) is fixed to the positioning portion (14).

9. An engine valve rocker assembly with cylinder deactivation according to claim 5, 6, 7 or 8, characterized in that the outlet of the oil passage (13) is located on the inner side wall opposite to the open end of the piston (4).