CN215860509U - Cylinder deactivation mechanism and motor-controlled variable valve device based on cylinder deactivation mechanism - Google Patents
Cylinder deactivation mechanism and motor-controlled variable valve device based on cylinder deactivation mechanism Download PDFInfo
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- CN215860509U CN215860509U CN202120824710.1U CN202120824710U CN215860509U CN 215860509 U CN215860509 U CN 215860509U CN 202120824710 U CN202120824710 U CN 202120824710U CN 215860509 U CN215860509 U CN 215860509U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The utility model discloses a cylinder deactivation mechanism and a motor-controlled variable valve device based on the cylinder deactivation mechanism, which belong to the technical field of engines and specifically comprise: actuating mechanism and drive mechanism, drive mechanism sets up drive mechanism is last, still includes: one end of the elastic piece is connected with the transmission mechanism, and the other end of the elastic piece is connected with the valve mechanism; and the motor control device is in transmission connection with the transmission mechanism. The variable valve device is controlled by the motor control device, so that the control of the valve stopping is realized when the cylinder is stopped, and the technical problem of emission deterioration of the cylinder-stopped engine only by adopting the oil injection and ignition control mode of the cylinder for stopping working is solved.
Description
Technical Field
The utility model belongs to the technical field of engines, and particularly relates to a cylinder deactivation mechanism and a motor-controlled variable valve device based on the cylinder deactivation mechanism.
Background
Due to the severe situation of energy and environmental problems, engines face a road of pursuing more high efficiency, energy conservation and environmental protection; therefore, a plurality of energy-saving and emission-reducing technologies come into force; the gas distribution mechanism in the engine is the basis for realizing the air exchange process of the engine and ensuring that the work cycle of the heat-power conversion of the internal combustion engine can be carried out repeatedly and continuously, and for the internal combustion engine, the internal combustion engine can operate under the partial load working condition frequently, and the coefficient of residual waste gas is high, so how to improve the combustion working stability of the engine, reduce the pump gas loss during partial load, organize the quick combustion process, and improve the combustion efficiency is very important. Therefore, the variable valve lift technology and the variable displacement technology are developed at the same time, and a smaller valve lift is adopted when the engine is in partial load, so that the air flow speed passing through the valve is increased, the turbulence intensity is increased, the flame propagation speed and the combustion speed are improved, and the rapid combustion process is organized; and when the engine is in high speed and high load, a larger valve lift is adopted to reduce the flow resistance to the maximum extent, improve the charging coefficient and improve the dynamic property of the engine at high speed. In addition, the variable displacement technology can adopt a cylinder deactivation technology to stop part of cylinders when the engine is under a small load, so that pumping loss, heat transfer loss and mechanical loss are reduced, and the comprehensive performance of the engine can be obviously improved.
However, when the engine adopts the cylinder deactivation technology, if only the fuel injection and ignition of the deactivated cylinders are interrupted, the deactivated cylinders still continuously intake and exhaust, which has a very bad negative effect on the engine emissions. At present, most of automobile engines use a three-way catalytic converter to treat exhaust emission, the three-way catalytic converter can simultaneously have good conversion efficiency on three emissions of hydrocarbon, carbon monoxide and nitrogen oxide only when the excess air coefficient is near 1, if a cylinder does not work to continuously intake air, the excess air coefficient in an exhaust pipe of the engine is far larger than 1, the conversion efficiency of the nitrogen oxide in the exhaust is remarkably reduced, and the emission is deteriorated.
Therefore, the existing engine has the technical problems that the mechanism is too complicated, the manufacturing cost is greatly increased, and the emission is deteriorated due to the cylinder deactivation engine which only adopts the mode of interrupting the fuel injection and ignition control of the work stopping cylinder.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a cylinder deactivation mechanism and a motor-controlled variable valve device based on the cylinder deactivation mechanism, which at least solve the technical problem of emission deterioration of a cylinder deactivation engine only adopting a mode of interrupting oil injection and ignition control of a working cylinder.
To achieve the above object, in one aspect, the present invention provides a cylinder deactivation mechanism, including: actuating mechanism and drive mechanism, drive mechanism sets up drive mechanism is last, its characterized in that still includes:
one end of the elastic piece is connected with the transmission mechanism, and the other end of the elastic piece is connected with the valve mechanism;
and the motor control device is in transmission connection with the transmission mechanism.
Optionally, the transmission mechanism includes a first tappet and a second tappet, the first tappet and the second tappet are in threaded connection, and the first tappet is in sliding connection with the driving mechanism.
Optionally, the thread is trapezoidal in shape.
Optionally, the motor control device includes a driven gear, a driving gear, a motor shaft, and a motor, the driven gear is disposed on the second tappet, one end of the driving gear is engaged with the driven gear, and the other end of the driving gear is fixedly connected to the motor shaft and is driven by the motor on the motor shaft to operate.
Optionally, a first elastic piece mounting groove is formed in the bottom end of the second tappet, a second elastic piece mounting groove is formed in the upper end surface of the valve mechanism at a position corresponding to the first elastic piece mounting groove, and two ends of the elastic piece are located in the first elastic piece mounting groove and the second elastic piece mounting groove respectively.
Optionally, the tooth surface length of the driving gear is greater than the tooth surface length of the driven gear, and the driven gear can move up and down relative to the driving gear.
Optionally, the elastic member is a return spring.
In another aspect, the present invention further provides a variable valve device controlled by a motor, including a valve mechanism, further including:
according to the cylinder deactivation mechanism, the elastic piece in the cylinder deactivation mechanism is elastically connected with the valve mechanism, and the driving mechanism drives the transmission mechanism to control the lifting motion of the elastic piece.
Optionally, the valve mechanism includes a valve seat, a valve and a cylinder cover, the valve seat is disposed on the cylinder cover, one end of the valve is mounted on the valve seat, and the other end of the valve cooperates with the transmission mechanism to control the open and close state of the valve.
Optionally, a valve spring seat is arranged on the periphery of the valve, and a valve main spring and a valve auxiliary spring are assembled and connected between the valve spring seat and the cylinder cover.
The utility model has the beneficial effects that:
by adopting the motor control device to control the variable valve device, when the cylinder is stopped, the cylinder is stopped in a way of stopping the valve, and the exhaust emission of the engine can be reduced without changing an engine treatment system.
Furthermore, the utility model can reduce the pumping loss and the mechanical loss of the engine, improve the inflation efficiency, optimize the working process of the engine and achieve the effects of energy conservation and emission reduction.
Furthermore, the utility model can realize variable valve lift and flexible control.
Furthermore, the utility model has simple structure and convenient manufacture.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 is a schematic structural diagram illustrating a cylinder deactivation mechanism based motor controlled variable valve actuation apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating a valve lift of a cylinder deactivation mechanism-based motor-controlled variable valve device at a maximum position according to an embodiment of the present invention.
In the drawings: 1. a camshaft; 2. a cam; 3. a first tappet; 4. a second tappet; 5. an air valve; 6. a driving gear; 7. a motor shaft; 8. a motor; 9. a driven gear; 10. a return spring; 11. a cylinder head; 12. a valve spring seat; 13. a valve main spring; 14. a valve train spring; 15. a valve seat.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
The utility model provides a cylinder deactivation mechanism and a motor-controlled variable valve device based on the cylinder deactivation mechanism, aiming at overcoming the defects of low small load efficiency and fixed valve lift motion rule of a gasoline engine, realizing valve deactivation control when a cylinder is deactivated to work, and solving the technical problem of emission deterioration of a cylinder deactivation engine only adopting a mode of interrupting oil injection and ignition control of a cylinder to be deactivated.
To achieve the above object, in one aspect, the present invention provides a cylinder deactivation mechanism, including: actuating mechanism and drive mechanism, drive mechanism sets up drive mechanism is last, still includes:
one end of the elastic piece is connected with the transmission mechanism, and the other end of the elastic piece is connected with the valve mechanism;
and the motor control device is in transmission connection with the transmission mechanism.
Specifically, the driving mechanism comprises a cam and a cam shaft, and the cam is rotationally connected with the cam shaft.
It should be noted that the driving mechanism drives the spring lifting element to move through the transmission mechanism by the motor control device, and the opening and closing of the valve mechanism are controlled by the movement of the spring element.
The variable valve device is controlled by the motor control device, so that the control of the valve stopping is realized when the cylinder is stopped, and the technical problem of emission deterioration of the cylinder-stopped engine only by adopting the oil injection and ignition control mode of the cylinder for stopping working is solved.
Optionally, the transmission mechanism includes a first tappet and a second tappet, the first tappet and the second tappet are in threaded connection, and the first tappet is in sliding connection with the driving mechanism.
Specifically, the motor control device works to change the screwing length of the threads of the second tappet and the first tappet, so that the distance between the bottom end face of the second tappet and the upper end face of the valve mechanism is changed.
Optionally, the thread is trapezoidal in shape.
Optionally, the motor control device includes a driven gear, a driving gear, a motor shaft, and a motor, the driven gear is disposed on the second tappet, one end of the driving gear is engaged with the driven gear, and the other end of the driving gear is fixedly connected to the motor shaft and is driven by the motor on the motor shaft to operate.
Specifically, the motor works to drive the driving gear to rotate, the driven gear meshed with the driving gear rotates, so that the screwing length of the threads of the second tappet and the first tappet is changed, the distance between the bottom end face of the second tappet and the upper end face of the valve mechanism is further changed, in the rotating process of the cam shaft, when the cam drives the first tappet and the second tappet to move downwards to the contact between the bottom end face of the second tappet and the upper end face of the valve mechanism, the valve mechanism starts to be opened, namely, the effective stroke for driving the valve mechanism to be opened is changed, and the valve lift is changed.
Optionally, a first elastic piece mounting groove is formed in the bottom end of the second tappet, a second elastic piece mounting groove is formed in the upper end surface of the valve mechanism at a position corresponding to the first elastic piece mounting groove, and two ends of the elastic piece are located in the first elastic piece mounting groove and the second elastic piece mounting groove respectively.
Optionally, the tooth surface length of the driving gear is greater than the tooth surface length of the driven gear, and the driven gear can move up and down relative to the driving gear.
Optionally, the elastic member is a return spring.
Specifically, when the camshaft rotates, the first tappet and the second tappet move downwards under the driving of the cam, and the return spring is compressed and drives the valve mechanism to open; when the cam moves to the maximum lift and falls back, the second tappet and the first tappet move upwards along with the relative displacement of the cam under the action force of the return spring, and the valve mechanism gradually falls back and is closed under the action force of the valve spring.
In another aspect, the present invention further provides a variable valve device controlled by a motor, including a valve mechanism, further including:
according to the cylinder deactivation mechanism, the elastic piece in the cylinder deactivation mechanism is elastically connected with the valve mechanism, and the driving mechanism drives the transmission mechanism to control the lifting motion of the elastic piece.
Optionally, the valve mechanism includes a valve seat, a valve and a cylinder cover, the valve seat is disposed on the cylinder cover, one end of the valve is mounted on the valve seat, and the other end of the valve cooperates with the transmission mechanism to control the open and close state of the valve.
Optionally, a valve spring seat is arranged on the periphery of the valve, and a valve main spring and a valve auxiliary spring are assembled and connected between the valve spring seat and the cylinder cover.
Specifically, when the camshaft rotates, the first tappet and the second tappet move downwards under the driving of the cam, and the return spring is compressed and drives the valve to open; when the cam moves to the maximum lift and falls back, the second tappet and the first tappet move upwards along with the relative displacement of the cam under the action force of the return spring, and the valve gradually falls back and is closed under the action force of the valve main spring and the valve auxiliary spring.
Example 1
As shown in fig. 1, the present embodiment provides a cylinder deactivation mechanism, which includes, from top to bottom, a cam 2, a cam shaft 1, a first tappet 3, a second tappet 4, a valve mechanism, a return spring 10 located between the second tappet 4 and the valve mechanism, and a motor control device, where the motor control device includes a driven gear 9, a driving gear 6, a motor shaft 7, and a motor 8, the driven gear 9 is disposed on the second tappet 4, one end of the driving gear 6 is engaged with the driven gear 9, and the other end of the driving gear 6 is fixedly connected to the motor shaft 7 and is driven by the motor 8 located on the motor shaft 7 to operate.
The cam 2 is connected with the first tappet 3 in a sliding mode, the first tappet 3 and the second tappet 4 are connected in a screwing mode through trapezoidal threads, the reset spring 10 is installed between the bottom end face of the second tappet 4 and the upper end face of the valve mechanism, reset spring installation grooves (not shown in the figure) are formed in the bottom end face of the second tappet 4 and the upper end face of the valve mechanism, certain pre-tightening force is generated when the reset spring 10 is installed, and counter-thrust is provided for the second tappet 4 to return upwards; in addition, the lower part of the second tappet 4 is provided with a driven gear 9, the driven gear 9 is meshed with the driving gear 6, the driving gear 6 is fixedly connected on the motor shaft 7 and is driven by the motor 8 to rotate, and the motor 8 can realize positive rotation and reverse rotation; the tooth surface length of the driving gear 6 is larger than that of the driven gear 9, and the driven gear 9 can move up and down relative to the driving gear 9, that is, the meshing position can be changed.
The variable valve device is controlled by the motor control device, so that the control of the valve stopping is realized when the cylinder is stopped, and the technical problem of emission deterioration of the cylinder-stopped engine only by adopting the oil injection and ignition control mode of the cylinder for stopping working is solved.
Furthermore, the utility model has simple structure and convenient manufacture.
Example 2
Referring to fig. 1 and 2, the present embodiment provides a variable valve device controlled by a motor based on a cylinder deactivation mechanism, including the cylinder deactivation mechanism of embodiment 1, and further including a valve mechanism, where the valve mechanism includes a valve seat 15, a valve 5 and a cylinder head 11, the valve seat 15 is disposed on the cylinder head 11, one end of the valve 5 is mounted on the valve seat 15, and the other end of the valve 5 cooperates with a transmission mechanism to control the valve seat 15 to open and close the valve 5.
Optionally, a valve spring seat 12 is arranged on the periphery of the valve 5, and a valve main spring 13 and a valve auxiliary spring 14 are assembled and connected between the valve spring seat 12 and the cylinder cover 11.
The working process of the mechanism is as follows:
when the engine normally works and the valve lift is maximum, as shown in fig. 2, the screw thread screwing length of the second tappet 4 and the first tappet 3 is shortest, the bottom end surface of the second tappet 4 is just contacted with the upper end surface of the valve 5, and the motor 8 does not work. When the camshaft 1 rotates, the first tappet 3 and the second tappet 4 move downwards under the driving of the cam 2, the return spring 10 is compressed, and the valve 5 is driven to open; when the cam 2 moves to the maximum lift and falls back, under the action of the return spring 10, the second tappet 4 and the first tappet 3 move upwards along with the relative displacement of the cam profile, and the valve 5 gradually falls back and is closed under the action of the return spring 10.
When the lift of the engine valve needs to be adjusted, the motor 8 works to drive the driving gear 6 to rotate, the driven gear 9 meshed with the driving gear rotates to change the screwing length of the threads of the second tappet 4 and the first tappet 3, so that the distance between the bottom end face of the second tappet 4 and the upper end face of the valve 5 is changed, in the rotating process of the camshaft 1, the cam 2 drives the first tappet 3 and the second tappet 4 to move downwards until the bottom end face of the second tappet 4 is contacted with the upper end face of the valve 5, the valve 5 starts to be opened, namely, the effective stroke for driving the valve 5 to be opened is changed, so that the lift of the valve is changed.
When the engine needs to be deactivated, the motor 8 drives the first tappet 3 and the second tappet 4 to realize the longest screwing length, at the moment, the distance between the bottom end surface of the second tappet 4 and the upper end surface of the valve 5 is the largest, and when the cam 2 drives the first tappet 3 and the second tappet 4 to move downwards to the maximum displacement position, the bottom end surface of the second tappet 4 just contacts with the upper end surface of the valve 5, namely the valve 5 is not opened.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The utility model provides a cylinder deactivation mechanism, includes actuating mechanism and drive mechanism, drive mechanism sets up drive mechanism is last, its characterized in that still includes:
one end of the elastic piece is connected with the transmission mechanism, and the other end of the elastic piece is connected with the valve mechanism;
and the motor control device is in transmission connection with the transmission mechanism.
2. The cylinder deactivation mechanism of claim 1 wherein said transmission mechanism includes a first tappet and a second tappet, said first tappet and said second tappet being threadably connected, said first tappet being slidably connected to said drive mechanism.
3. The cylinder deactivation mechanism of claim 2, wherein said threads are trapezoidal in shape.
4. The cylinder deactivation mechanism as claimed in claim 2, wherein said motor control device includes a driven gear, a driving gear, a motor shaft and a motor, said driven gear is disposed on said second tappet, one end of said driving gear is engaged with said driven gear, and another end of said driving gear is fixed on said motor shaft and driven by said motor on said motor shaft.
5. The cylinder deactivation mechanism according to claim 2, wherein a first elastic member mounting groove is formed at a bottom end of the second tappet, a second elastic member mounting groove is formed at an upper end surface of the valve mechanism at a position corresponding to the first elastic member mounting groove, and both ends of the elastic member are respectively located in the first elastic member mounting groove and the second elastic member mounting groove.
6. The cylinder deactivation mechanism of claim 4 wherein a tooth surface length of said drive gear is greater than a tooth surface length of said driven gear, and said driven gear is movable up and down relative to said drive gear.
7. The cylinder deactivation mechanism of claim 1 wherein said resilient member is a return spring.
8. A motor-controlled variable valve apparatus including a valve mechanism, characterized by further comprising: the cylinder deactivation mechanism as claimed in any one of claims 1 to 7, wherein the elastic member of the cylinder deactivation mechanism is elastically connected to the valve mechanism, and the driving mechanism drives the transmission mechanism to control the lifting motion of the elastic member.
9. The motor-controlled variable valve apparatus according to claim 8, wherein the valve mechanism includes a valve seat, a valve, and a cylinder head, the valve seat is provided on the cylinder head, one end of the valve is mounted on the valve seat, and the other end of the valve cooperates with a transmission mechanism to control an open/close state of the valve.
10. The motor-controlled variable valve apparatus according to claim 9, wherein a valve spring seat is provided on an outer periphery of the valve, and a valve main spring and a valve sub spring are fitted between the valve spring seat and a cylinder head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120824710.1U CN215860509U (en) | 2021-04-21 | 2021-04-21 | Cylinder deactivation mechanism and motor-controlled variable valve device based on cylinder deactivation mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120824710.1U CN215860509U (en) | 2021-04-21 | 2021-04-21 | Cylinder deactivation mechanism and motor-controlled variable valve device based on cylinder deactivation mechanism |
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| CN215860509U true CN215860509U (en) | 2022-02-18 |
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| CN202120824710.1U Active CN215860509U (en) | 2021-04-21 | 2021-04-21 | Cylinder deactivation mechanism and motor-controlled variable valve device based on cylinder deactivation mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622964A (en) * | 2022-03-11 | 2022-06-14 | 潍柴动力股份有限公司 | Be used in valve stem structure, engine and vehicle on cylinder body |
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2021
- 2021-04-21 CN CN202120824710.1U patent/CN215860509U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622964A (en) * | 2022-03-11 | 2022-06-14 | 潍柴动力股份有限公司 | Be used in valve stem structure, engine and vehicle on cylinder body |
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