CN110656996A - Cylinder deactivation mechanism and hydraulic control variable valve device based on cylinder deactivation mechanism - Google Patents

Abstract

The invention is applicable to the technical field of engines, and provides a cylinder deactivation mechanism, including a driving mechanism and a lift mechanism, and further comprising: an elastic accommodating mechanism, which is arranged on the lift mechanism and is used for restricting the lift mechanism of the driving mechanism through elastic expansion and contraction. The transmission of the mechanism and provide the fluid accommodating space; the pressurizing mechanism, the output end is communicated with the elastic accommodating mechanism, and is used to inject fluid into the elastic accommodating mechanism, so that the elastic accommodating mechanism drives the lift mechanism to rise and fall under the transmission of the driving mechanism movement; and a decompression mechanism, the input end communicates with the elastic accommodating mechanism, and is used for the outflow and collection of the fluid in the elastic accommodating mechanism, so that the elastic accommodating mechanism stops the transmission of the lift mechanism; the output end of the pressurizing mechanism and the The input end of the pressure reducing mechanism is communicated with the elastic accommodating mechanism through the same channel, and the opening and closing states of the pressure increasing mechanism and the pressure reducing mechanism are staggered from each other. The present invention has a simple structure, effectively reduces the fuel consumption rate of the engine, burns more thoroughly under medium and small loads, and has good emission performance.

Description

A cylinder deactivation mechanism and a hydraulically controlled variable valve device based on the cylinder deactivation mechanism

technical field

The invention belongs to the technical field of engines, and in particular relates to a cylinder deactivation mechanism and a hydraulically controlled variable valve device based on the cylinder deactivation mechanism.

Background technique

In recent years, with the increasingly strict emission regulations and rising oil prices, more and more attention has been paid to the technology of energy saving and emission reduction of automobile engines.

In the prior art, for a multi-cylinder engine that works under medium and small loads for a long time, due to its harsh working environment, the effective fuel consumption rate under medium and small loads is high, the combustion is insufficient, and the emission performance is poor. Lower fuel consumption has become an important development direction for upgrading and improving multi-cylinder engines.

However, in the prior art, the overall efficiency of the multi-cylinder engine is low when the load is small, and it is necessary to stop the work of some cylinders in the multi-cylinder engine.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a cylinder stop mechanism, which aims to solve the problem of needing to stop the operation of some cylinders in a multi-cylinder engine, and to realize oil leakage when the cylinder stop mechanism works through the control of a solenoid valve under a small load state.

The embodiments of the present invention are implemented in this way, a cylinder deactivation mechanism includes a drive mechanism and a lift mechanism, and further includes:

The elastic accommodating mechanism is arranged on the lift mechanism, and is used to limit the transmission of the drive mechanism to the lift mechanism through elastic expansion and contraction, and provide a fluid accommodating space;

a pressurizing mechanism, the output end is communicated with the elastic accommodating mechanism, and is used for injecting fluid into the elastic accommodating mechanism so that the elastic accommodating mechanism drives the lifting mechanism to move up and down under the transmission of the driving mechanism; and

The decompression mechanism, the input end is communicated with the elastic accommodating mechanism, and is used for the outflow and collection of the fluid in the elastic accommodating mechanism, so that the elastic accommodating mechanism stops the transmission of the lift mechanism;

The output end of the pressurizing mechanism and the input end of the decompressing mechanism are communicated with the elastic accommodating mechanism through the same channel, and the opening and closing states of the pressurizing mechanism and the decompressing mechanism are staggered from each other.

Another object of the embodiment of the present invention is that the elastic accommodating mechanism includes a transmission accommodating structure and a movable structure for the operation of the transmission accommodating structure, and the interior of the transmission accommodating structure passes through a channel and an increaser provided on the movable structure. The pressure mechanism and the decompression mechanism are connected.

Another object of the embodiment of the present invention is that the transmission accommodating structure includes a tappet assembly that is elastically connected and matched and an accommodating cavity formed by the cooperation of the tappet assembly, and the space size of the accommodating cavity is determined by the elasticity of the tappet assembly. In cooperation with the control, the accommodating cavity communicates with the channel located on the movable structure.

Another object of the embodiment of the present invention is that one end of the tappet assembly is fixedly connected with the lift mechanism, and the other end is movably offset with the driving mechanism.

Another object of the embodiment of the present invention is that the pressurizing mechanism includes a pump set structure for injecting fluid into the channel and a pressurizing control structure for regulating the passage of the fluid.

Another object of the embodiments of the present invention is that the pressurization control structure includes a first control valve assembly for controlling the pump set structure to inject fluid into the channel and a first one-way valve for restricting the backflow of the fluid in the channel to the pump set structure valve assembly.

Another object of the embodiments of the present invention is that the decompression mechanism includes a collection structure and a decompression control structure, and the decompression control structure regulates the fluid entering the collection structure from the channel.

Another object of the embodiments of the present invention is that the decompression control structure includes a second control valve assembly for controlling the flow of fluid from the channel into the collection structure and a second one-way valve for restricting the backflow of the fluid in the collection structure into the channel valve assembly.

The embodiments of the present invention are implemented in the following way: a hydraulically controlled variable valve device includes a valve mechanism, and further includes:

The cylinder deactivation mechanism, in which the lift mechanism and the valve mechanism are movably connected, are used to drive the elastic accommodating mechanism and the lift mechanism to move through the driving mechanism, and cooperate with the booster mechanism and the decompression mechanism to carry out the elastic accommodating mechanism. Adjustment of pressurization and decompression.

In the cylinder deactivation mechanism provided by the embodiment of the present invention, after the booster mechanism is turned on, the purpose of driving the lift mechanism to move by the drive mechanism through the elastic accommodating mechanism is achieved by controlling the internal pressure of the elastic accommodating mechanism, and when the booster mechanism is turned off And after the decompression mechanism is opened, the purpose that the drive mechanism cannot drive the lift mechanism to move through the elastic accommodation mechanism can be achieved by controlling the internal pressure of the elastic accommodation mechanism, so that the lift mechanism is in a stopped state, and the purpose of stopping the cylinder can be achieved. Simple structure, little change in the original valve mechanism; electromagnetic valve, quick response; can make full use of the energy of the engine, the thermal efficiency of the engine is improved; effectively reduce the fuel consumption rate of the engine; it is good.

Description of drawings

FIG. 1 is a schematic structural diagram of a hydraulically controlled variable valve device based on a cylinder deactivation mechanism according to an embodiment of the present invention.

In the drawings: 1. Adjusting screw; 2. Adjusting nut; 3. Rocker arm; 4. Lock plate; 5. Valve spring seat; 6. Valve cover; 7. Valve main spring; 8. Valve auxiliary spring; 9. Valve guide rod; 10, valve; 11, cylinder head; 12, push rod; 13, first tappet; 14, return spring; 15, cylinder block; 16, second tappet; 17, camshaft; 18, Oil discharge port; 19, valve seat; 20, first solenoid valve; 21, first check valve; 22, second solenoid valve; 23, second check valve; 24, oil pan.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

As shown in FIG. 1 , a cylinder deactivation mechanism provided for an embodiment of the present invention includes a drive mechanism and a lift mechanism, and further includes:

The elastic accommodating mechanism is arranged on the lift mechanism, and is used to limit the transmission of the drive mechanism to the lift mechanism through elastic expansion and contraction, and provide a fluid accommodating space;

a pressurizing mechanism, the output end is communicated with the elastic accommodating mechanism, and is used for injecting fluid into the elastic accommodating mechanism so that the elastic accommodating mechanism drives the lifting mechanism to move up and down under the transmission of the driving mechanism; and

The decompression mechanism, the input end is communicated with the elastic accommodating mechanism, and is used for the outflow and collection of the fluid in the elastic accommodating mechanism, so that the elastic accommodating mechanism stops the transmission of the lift mechanism;

The output end of the pressurizing mechanism and the input end of the decompressing mechanism are communicated with the elastic accommodating mechanism through the same channel, and the opening and closing states of the pressurizing mechanism and the decompressing mechanism are staggered from each other.

In the embodiment of the present invention, after the booster mechanism is turned on, the purpose of driving the lift mechanism to move by the drive mechanism through the elastic accommodating mechanism is achieved by controlling the internal pressure of the elastic accommodating mechanism, and when the booster mechanism is closed and the decompression mechanism is turned on Afterwards, the purpose that the drive mechanism cannot drive the lift mechanism to move through the elastic accommodation mechanism can be achieved by controlling the internal pressure of the elastic accommodation mechanism, so that the lift mechanism is in a stopped state, and the purpose of stopping the cylinder can be achieved.

As shown in FIG. 1 , as a preferred embodiment of the present invention, the elastic accommodating mechanism includes a transmission accommodating structure and a movable structure for the operation of the transmission accommodating structure. The channel on the structure is communicated with the pressurizing mechanism and the decompressing mechanism.

The transmission accommodating structure includes a tappet assembly that is elastically connected and matched and an accommodating cavity formed by the cooperation of the tappet assembly. The space size of the accommodating cavity is controlled by the elastic cooperation of the tappet assembly. The channels on the active structure are connected.

One end of the tappet assembly is fixedly connected with the lift mechanism, and the other end is movably counteracted with the driving mechanism.

In the embodiment of the present invention, preferably, the movable structure includes a cylinder block 15, a through channel is formed in the cylinder block 15, a driving mechanism is provided below the cylinder block 15, and the driving mechanism is preferably a camshaft 17; The transmission accommodating structure includes a tappet assembly and an accommodating cavity formed by the cooperation of the tappet assembly.

In the embodiment of the present invention, preferably, the tappet assembly includes a first tappet 13 and a second tappet 16 slidably matched with the first tappet 13 , and the first tappet 13 and the second tappet 16 are slidably sleeved. The two ends of the return spring 14 are connected and fixed with the first tappet 13 and the second tappet 16 respectively, so that the first tappet is fixed. 13 and the second tappet 16 are elastically connected by a return spring 14 .

In the embodiment of the present invention, preferably, the channel preferably includes an annular groove embedded in the periphery of the first tappet 13 and a hole penetrating one side of the cylinder 15. The annular groove communicates with the accommodating cavity, so that the pressure is increased. The mechanism and the decompression mechanism can communicate with the accommodating cavity through the orifice and the annular groove.

In the embodiment of the present invention, preferably, one side of the cylinder body 15 is located below the hole and is also provided with an oil discharge port 18, so that when the pressurizing mechanism is turned on and the decompression mechanism is closed, the oil is injected into the accommodating cavity through the pressurizing mechanism. When the first tappet 13 slides down to be opposite to the oil discharge port 18, the fluid can flow out through the annular groove and the oil discharge port 18, so as to avoid excessive pressure in the accommodating cavity.

In the embodiment of the present invention, preferably, the lower end of the second tappet 16 is movably attached to the surface of the camshaft 17, and the upper end of the first tappet 13 is connected to the lift mechanism by welding, riveting or hinge connection.

In the embodiment of the present invention, preferably, the lift mechanism includes a push rod 12, and the upper end of the push rod 12 is connected to the valve mechanism.

As shown in FIG. 1 , as a preferred embodiment of the present invention, the pressurizing mechanism includes a pump set structure for injecting fluid into a channel and a pressurizing control structure for regulating the passage of fluid.

The pressurization control structure includes a first control valve assembly for controlling the pump set structure to inject fluid into the channel and a first one-way valve assembly for restricting the backflow of the fluid in the channel to the pump set structure.

In the embodiment of the present invention, preferably, an oil pump may be used for the pump set structure, the output end of the oil pump is connected with a channel through a pipeline, and a pressurization control structure is also provided on the pipeline of the output end of the oil pump.

In the embodiment of the present invention, preferably, the pressurization control structure includes a first solenoid valve 20 and a first one-way valve 21. The opening and closing of the first solenoid valve 20 can control the oil pump to deliver oil into the passage, while the first one-way valve 20 can be opened and closed. The direction valve 21 restricts the one-way communication formed from the oil pump to the channel, so as to prevent the oil in the accommodating cavity from flowing back into the pipeline at the output end of the oil pump.

In the embodiment of the present invention, preferably, the first one-way valve 21 is provided between the first solenoid valve 20 and the passage.

In the embodiment of the present invention, preferably, when the cylinder deactivation mechanism is in a non-working state, the first solenoid valve 20 is opened and the second solenoid valve 22 is closed. At this time, the oil in the pump group structure is pressurized by the oil pump and passes through The first one-way valve 21 enters the accommodating cavity, so that the hydraulic pressure in the accommodating cavity rises rapidly. Since the second solenoid valve 22 is in the closed state, the oil can only enter the accommodating cavity through the pipeline of the pump group structure, which is a one-way path. During operation, part of the oil in the accommodating cavity will flow into the cavities of the second tappet 16 and the first tappet 13, and then flow out through the oil discharge port 18. Therefore, in order to ensure that there is sufficient pressure in the accommodating cavity, The second tappet 16 is in close contact with the camshaft 17, the first solenoid valve 20 will always be open, the second tappet 16 and the first tappet 13 move upward synchronously with the rotation of the camshaft 17, the second tappet 16 When going down, relying on the elastic force of the valve mechanism, it is necessary to ensure that there is a certain hydraulic pressure in the accommodating cavity, in order to accurately convert the rotary motion of the camshaft 17 to the reciprocating motion of the lift mechanism, so as to ensure that the cylinder engine is in normal working condition.

As shown in FIG. 1 , as a preferred embodiment of the present invention, the decompression mechanism includes a collection structure and a decompression control structure, and the decompression control structure adjusts the fluid entering the collection structure from the channel.

The reduced pressure control structure includes a second control valve assembly for controlling the flow of fluid from the channel into the collection structure and a second one-way valve assembly for restricting the backflow of fluid in the collection structure into the channel.

In the embodiment of the present invention, preferably, the oil pan 24 may be used as the collecting structure. The oil pan 24 is communicated with the channel through a pipeline, and a decompression control structure is also provided on the pipeline connected to the oil pan 24 .

In the embodiment of the present invention, preferably, the decompression control structure includes a second solenoid valve 22 for controlling the communication between the oil pan 24 and the passage, and a second solenoid valve 22 for restricting the flow direction of the fluid from the passage to the oil pan 24 One-way valve 23, and the second one-way valve 23 is arranged between the second solenoid valve 22 and the oil pan 24, so that the oil can be prevented from flowing back into the passage through the oil pan 24.

In the embodiment of the present invention, preferably, when in the working state, the valve mechanism is in the closed state, at this time the first solenoid valve 20 is closed and the second solenoid valve 22 is opened, and the oil in the pump set structure cannot enter the accommodating cavity, The second tappet 16 moves up and down with the rotation of the camshaft 17 . During the upward movement, the oil in the accommodating cavity is pressed into the oil pan 24 . The second one-way valve 23 is also used to prevent the oil in the accommodating cavity from being pressed into the structure of the pump group, the first one-way valve 21 is installed in front of the first solenoid valve 20, and the oil in the accommodating cavity is squeezed into the oil pan 24. The oil pressure in the accommodating cavity is low, the second tappet 16 moves up and the first tappet 13 does not move, so that the valve mechanism does not work, so as to achieve the purpose of stopping the cylinder, and then the second tappet 17 rotates. The tappet 16 returns to the initial state under the action of the return spring 14 .

As shown in FIG. 1 , a hydraulically controlled variable valve device provided by an embodiment of the present invention includes a valve mechanism, and further includes:

The cylinder deactivation mechanism, in which the lift mechanism and the valve mechanism are movably connected, are used to drive the elastic accommodating mechanism and the lift mechanism to move through the driving mechanism, and cooperate with the booster mechanism and the decompression mechanism to carry out the elastic accommodating mechanism. Adjustment of pressurization and decompression.

In the embodiment of the present invention, preferably, the valve mechanism includes a rocker arm 3 whose upper end of the push rod 12 is cooperatively connected by an adjustment screw 1 and an adjustment nut 2, and an end of the rocker arm 3 that is far away from the push rod 12 and is restricted from opening and closing by the valve guide rod 9. The ends of the valves 10 and 9 are movably adapted to the valve seat 19, and the valve seat 19 is matched to open and close the valve 10 through the movable lift of the valve guide rod 9. The valve seat 19 is arranged on the cylinder head 11, and the cylinder head 11 is also covered with a The valve cover 6 and the valve guide rod 9 are provided with a valve spring seat 5 near the right periphery of the rocker arm 3. The valve spring seat 5 is assembled and fixed by the locking piece 4 and the valve guide rod 9. The valve spring seat 5 and the cylinder head 11 are assembled and fixed. The assembly is connected with the valve main spring 7 and the valve auxiliary spring 8. The valve guide rod 9 compresses the valve main spring 7 and the valve auxiliary spring 8 through the valve spring seat 5 during the descending process. During the rising process, the valve main spring 7 and the valve auxiliary spring 8 are compressed. A reaction force is provided to ensure that the second tappet 16 can be tightly fitted with the camshaft 17 .

In the embodiment of the present invention, preferably, the rocker arm 3 is rotatably connected to the cylinder head 11, and the valve guide rod 9 is slidably arranged on the cylinder head 11, and the lift of the push rod 12 drives the rocker arm 3 to rotate, so that the rocker arm 3 is far away from the cylinder head 11. One end of the push rod 12 descends when the push rod 12 ascends, so that the valve guide 9 moves downward.

In the embodiment of the present invention, preferably, when the cylinder deactivation mechanism is in a non-working state, the first solenoid valve 20 is opened and the second solenoid valve 22 is closed. At this time, the oil in the pump group structure is pressurized by the oil pump and passes through The first one-way valve 21 enters the accommodating cavity, so that the hydraulic pressure in the accommodating cavity rises rapidly. Since the second solenoid valve 22 is in the closed state, the oil can only enter the accommodating cavity through the pipeline of the pump group structure, which is a one-way path. During operation, part of the oil in the accommodating cavity will flow into the cavities of the second tappet 16 and the first tappet 13, and then flow out through the oil discharge port 18. Therefore, in order to ensure that there is sufficient pressure in the accommodating cavity, The second tappet 16 is in close contact with the camshaft 17, the first solenoid valve 20 will always be open, the second tappet 16 and the first tappet 13 move upward synchronously with the rotation of the camshaft 17, the second tappet 16 When going down, relying on the elastic force of the valve main spring 7 and the valve auxiliary spring 8, it is necessary to ensure that there is a certain hydraulic pressure in the accommodating cavity, so as to accurately convert the rotary motion of the camshaft 17 to the reciprocating motion of the valve guide rod 9, so as to ensure that the engine of this cylinder is in the normal working condition.

In the embodiment of the present invention, preferably, when the valve guide rod 9 and the matching valve seat 19 keep the valve 10 in a closed state, at this time the first solenoid valve 20 is closed and the second solenoid valve 22 is opened, the oil in the pump group structure cannot be Enter the accommodating cavity, and the second tappet 16 moves up and down with the rotation of the camshaft 17. During the upward movement, the oil in the accommodating cavity is pressed into the oil pan 24. The second one-way valve 23 is added after the valve 22. At the same time, in order to prevent the oil in the container from being pressed into the structure of the pump group, a first one-way valve 21 is installed in front of the first solenoid valve 20, and the oil in the container is removed. Squeeze into the oil pan 24, the oil pressure in the accommodating cavity is low, the second tappet 16 moves up and the first tappet 13 does not move, so that the valve guide rod 9 cannot be driven by the lift of the push rod 12, so as to stop the cylinder Then, with the rotation of the camshaft 17, the second tappet 16 returns to the initial state under the action of the return spring 14.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (9)

1. A cylinder deactivation mechanism includes a driving mechanism and a lift mechanism, and is characterized by further comprising:

the elastic containing mechanism is arranged on the lift mechanism and used for limiting the transmission of the driving mechanism to the lift mechanism through elastic expansion and contraction and providing a fluid containing space;

the output end of the pressurizing mechanism is communicated with the elastic accommodating mechanism and is used for injecting fluid into the elastic accommodating mechanism so that the elastic accommodating mechanism drives the lift mechanism to move up and down under the transmission of the driving mechanism; and

the input end of the pressure reducing mechanism is communicated with the elastic containing mechanism and is used for flowing and collecting the fluid in the elastic containing mechanism so as to enable the elastic containing mechanism to stop the transmission of the lift mechanism;

the output end of the pressurizing mechanism and the input end of the pressure reducing mechanism are communicated with the elastic containing mechanism through the same channel, and the pressurizing mechanism and the pressure reducing mechanism are staggered in opening and closing states.

2. The cylinder deactivation mechanism as claimed in claim 1, wherein the elastic accommodation mechanism includes a transmission accommodation structure and a movable structure for the transmission accommodation structure to operate, and the transmission accommodation structure is communicated with the pressurization mechanism and the depressurization mechanism through a passage provided on the movable structure.

3. The cylinder deactivation mechanism according to claim 2, wherein the transmission accommodating structure comprises a tappet assembly and an accommodating cavity, the tappet assembly is elastically connected and matched with the accommodating cavity, the accommodating cavity is formed by matching the tappet assembly, the size of the accommodating cavity is controlled by elastic matching of the tappet assembly, and the accommodating cavity is communicated with the channel on the movable structure.

4. The cylinder deactivation mechanism of claim 3 wherein said tappet assembly is fixedly connected to said lift mechanism at one end and movably urged against said drive mechanism at the other end.

5. The cylinder deactivation mechanism of claim 2 wherein said pressurization mechanism includes a pumping arrangement for injecting fluid into the passageway and a pressurization control arrangement for regulating the passage of fluid.

6. The cylinder deactivation mechanism of claim 5 wherein said pressurization control structure includes a first control valve assembly for controlling the pumping arrangement to inject fluid into the passageway and a first one-way valve assembly for restricting the flow of fluid back into the pumping arrangement.

7. The cylinder deactivation mechanism of claim 2 wherein said pressure relief mechanism includes a collection structure and a pressure relief control structure, said pressure relief control structure regulating fluid flow from the passage into the collection structure.

8. The cylinder deactivation mechanism of claim 7, wherein said pressure relief control structure includes a second control valve assembly for controlling fluid flow from the passage to the collection structure and a second one-way valve assembly for restricting fluid flow back into the passage in the collection structure.

9. A hydraulically controlled variable valve device including a valve mechanism, characterized by further comprising:

the cylinder deactivation mechanism as claimed in any one of claims 1 to 8, wherein the lift mechanism and the valve mechanism are movably connected to each other, and the lift mechanism and the valve mechanism are driven by the driving mechanism to move, and the pressurizing mechanism and the depressurizing mechanism are matched to pressurize and depressurize the elastic accommodating mechanism.

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