CN111335979B - Camshaft toggle electromagnetic valve for variable valve lift system - Google Patents
Camshaft toggle electromagnetic valve for variable valve lift system Download PDFInfo
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- CN111335979B CN111335979B CN202010146418.9A CN202010146418A CN111335979B CN 111335979 B CN111335979 B CN 111335979B CN 202010146418 A CN202010146418 A CN 202010146418A CN 111335979 B CN111335979 B CN 111335979B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
- F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
- F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
- F01L2009/2103—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids comprising one coil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
- F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
- F01L2009/2128—Core and coil construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
- F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
- F01L2009/2167—Sensing means
- F01L2009/2169—Position sensors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention provides a camshaft toggle solenoid valve for a variable valve lift system, which is applied to the technical field of the variable valve lift system of an engine, and comprises a shell (1), wherein an electromagnetic coil (2) is arranged in the shell (1), an Erlenmeyer (3) is arranged in the electromagnetic coil (2), a magnetic core body (4) is arranged in the Erlenmeyer (3), the magnetic core body (4) is connected with a driving rod (5), a strong magnet (6) is arranged at one end of the shell (1), and the magnetic core body (4) is close to the strong magnet (6). The switching of high and low cams is realized, and the overall performance of the engine is improved.
Description
Technical Field
The invention belongs to the technical field of variable valve lift systems of engines, and particularly relates to a camshaft toggle electromagnetic valve for a variable valve lift system.
Background
In the technical field of variable valve lift systems of engines, axial change of a camshaft needs to be realized, and in the prior art, control is realized through extension and retraction of a driving rod of an electromagnetic valve. The electromagnetic valve in the prior art mainly has the following defects: 1, the electromagnetic force is used as a direct driving force, and the attenuation is obvious at high temperature, so that the response time is increased at high temperature. 2, the electromagnetic force is used as a direct driving force, and the electromagnetic force is increased by increasing the size of the solenoid to overcome the elastic force of the return spring and then drive the driving rod. 3, the holding force of the solenoid valve driving rod in the extending state is small, and the holding force is also maintained by the electromagnetic force of the solenoid. 4, the holding force of the electromagnetic valve driving rod in the reset state is small, and the holding force is maintained by the elastic force of a spring. Thus, there are significant disadvantages.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the camshaft toggle electromagnetic valve is simple in structure, and can reliably realize extension and contraction of the driving rod, so that axial toggle control of the camshaft is effectively realized through the driving rod under the control of the control part under the specific working condition of an engine, switching of high and low cams is realized through cooperation of the extended driving rod and a track groove on the camshaft, and the overall performance of the engine is improved.
To solve the technical problems, the invention adopts the technical scheme that:
the invention relates to a camshaft toggle electromagnetic valve for a variable valve lift system, which comprises a shell, wherein an electromagnetic coil is arranged in the shell, an Erie sleeve is arranged in the electromagnetic coil, a magnetic core body is arranged in the Erie sleeve and is connected with a driving rod, a strong magnet is arranged at one end of the shell, and the magnetic core body is close to the strong magnet.
The cam shaft shifting electromagnetic valve for the variable valve lift system is characterized in that a strong magnet of the cam shaft shifting electromagnetic valve is arranged into an axial magnetizing structure, a magnetic conductive gasket is arranged on the strong magnet, and a strong magnet magnetic circuit is formed when the strong magnet and the magnetic conductive gasket are attracted.
The cam shaft poking electromagnetic valve for the variable valve lift system is provided with a strong magnet in a radiation magnetizing structure, the strong magnet is arranged at one end of an outer sleeve in an electromagnetic coil, and a magnetic conduction stamping cover plate is arranged at the position, close to the shell, of the other end of the outer sleeve.
When the control part controls the electromagnetic coil circuit to be communicated, the electromagnetic coil magnetic circuit of the electromagnetic coil is set to be a structure which can be superposed and inverted with a strong magnet magnetic circuit.
When the control part controls the electromagnetic coil circuit to be communicated, the electromagnetic coil magnetic circuit of the electromagnetic coil is set to be a structure which can be branched with the strong magnet magnetic circuit at the position of the magnetic conductive gasket.
The camshaft shifting electromagnetic valve for the variable valve lift system further comprises a compression spring and a spring seat, the spring seat is installed on the driving rod, one end of the compression spring abuts against the Erhe sleeve, and the other end of the compression spring abuts against the spring seat.
The camshaft shifting electromagnetic valve for the variable valve lift system comprises a spring seat, a magnetic ring capable of sensing the position of a driving rod is installed in the spring seat, the shell comprises a shaft head portion, one end of the driving rod movably penetrates through the shaft head portion to extend to the outside of the shell, and a Hall sensor is installed in the shaft head portion.
The shell include the axle head portion, set up spring pocket and sensor groove on the axle head portion, the spring pocket is passed in the actuating lever activity, hall sensor installs in the sensor groove.
The camshaft toggle electromagnetic valve for the variable valve lift system comprises a driving rod adsorption locking unit, a power-on attenuation magnetic unit, a driving rod pushing-out unit and a driving rod position feedback unit.
The drive rod adsorption locking unit comprises a strong magnet and a magnetic conduction gasket or a magnetic conduction stamping cover plate, the power-on attenuation magnetic unit comprises a shell, an electromagnetic coil, an Eryu sleeve and a magnetic core body, the drive rod pushing unit comprises a compression spring and a spring seat, and the drive rod position feedback unit comprises a magnetic ring and a Hall sensor.
By adopting the technical scheme of the invention, the following beneficial effects can be obtained:
the camshaft shifting electromagnetic valve for the variable valve lift system comprises a driving rod adsorption locking unit, an electrifying attenuation magnetic unit, a driving rod pushing-out unit and a driving rod position feedback unit. The drive rod adsorption locking unit comprises a strong magnet and a magnetic conduction gasket or a magnetic conduction stamping cover plate, the power-on attenuation magnetic unit comprises a shell, an electromagnetic coil, an Eryu sleeve and a magnetic core body, the drive rod pushing unit comprises a compression spring and a spring seat, and the drive rod position feedback unit comprises a magnetic ring and a Hall sensor. The driving rod adsorption locking unit comprises an axially magnetized strong magnet, a magnetic conduction gasket and a strong magnet circuit. The ferromagnetic circuit is composed of a magnetic conductive material, and at the initial order position of the driving rod, the ferromagnetic is in attraction contact with the magnetic conductive gasket to form a closed ferromagnetic circuit, so that the ferromagnetic adsorbs and locks the driving rod through the magnetic conductive gasket, the driving rod is in a contraction state at the moment, and the power-on attenuation magnetic unit comprises a shell, an electromagnetic coil, an iron sleeve and a magnetic core body. When the driving rod is required to be matched with the track groove on the camshaft to push the camshaft to realize axial movement, the control part is used for electrifying the electromagnetic coil. At this time, the magnetic circuit of the electromagnetic coil is superposed and opposite to the magnetic circuit of the strong magnet, and the magnetic conductive gasket is branched, so that under the action of the reverse magnetic flux generated by electrifying the electromagnetic coil, the adsorption action of the strong magnet on the magnetic core body through the magnetic conductive gasket is weakened. Under the effect of the power-on attenuation magnetic unit, the locking force applied by the driving rod adsorption locking unit is smaller than the spring elasticity of the compression spring, so that the driving rod is pushed out, the driving rod extends out, the driving rod acts on the camshaft in the track groove acting on the camshaft, and the driving rod acts on the camshaft and applies axial force to drive the camshaft to move axially. Therefore, switching control of the high-low cam is effectively realized, and the accuracy is high. The camshaft shifting electromagnetic valve for the variable valve lift system has a simple structure, and can reliably realize the extension and contraction of the driving rod, so that the axial shifting control of the camshaft is effectively realized through the driving rod under the control of the control part and under the specific working condition of an engine, and the switching of high and low cams is realized through the matching of the extended driving rod and a track groove on the camshaft, and the overall performance of the engine is improved.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is a schematic overall structure diagram of an embodiment 1 of a camshaft toggle solenoid valve for a variable valve lift system according to the present invention;
fig. 2 is a schematic structural view of a driving rod adsorption locking unit of embodiment 1 of a camshaft toggle solenoid valve for a variable valve lift system according to the present invention;
FIG. 3 is a schematic structural diagram of an energization damping magnetic unit of embodiment 1 of a camshaft shifting solenoid valve for a variable valve lift system according to the present invention;
fig. 4 is a schematic structural view of a driving rod pushing unit of embodiment 1 of a camshaft toggle solenoid valve for a variable valve lift system according to the present invention;
fig. 5 is a schematic structural view of a shaft head portion of a housing of embodiment 1 of a camshaft toggle solenoid valve for a variable valve lift system according to the present invention;
FIG. 6 is a schematic overall structure diagram of embodiment 2 of a camshaft toggle solenoid valve for a variable valve lift system according to the present invention;
fig. 7 is a schematic structural view of a driving lever adsorption locking unit of embodiment 2 of a camshaft toggle solenoid valve for a variable valve lift system according to the present invention;
FIG. 8 is a schematic structural diagram of a strong magnet according to embodiment 2 of the present invention, wherein the electromagnetic valve is toggled by a camshaft in a variable valve lift system;
FIG. 9 is a schematic structural diagram of an energization attenuated magnetic unit of embodiment 2 of a camshaft shifting solenoid valve for a variable valve lift system according to the present invention;
fig. 10 is a schematic structural view of a driving lever push-out unit of embodiment 2 of a camshaft toggle solenoid valve for a variable valve lift system according to the present invention;
in the drawings, the reference numbers are respectively: 1. a housing; 2. an electromagnetic coil; 3. a luer cover; 4. a magnetic core body; 5. a drive rod; 6. strong magnets; 7. a magnetic conductive gasket; 8. a ferromagnetic circuit; 10. a compression spring; 11. a spring seat; 12. a magnetic ring; 13. a shaft head portion; 14. a magnetic conductive stamping cover plate; 15. a spring slot; 16. a sensor slot; 17. a drive lever adsorption locking unit; 18. a power-on magnetic force attenuation unit; 19. a drive lever push-out unit; 20. a drive lever position feedback unit; 21. magnetic conduction punching press apron magnetic circuit.
Detailed Description
The following detailed description of the embodiments of the present invention, such as the shapes and structures of the components, the mutual positions and connection relations among the components, the functions and operation principles of the components, will be made by referring to the accompanying drawings and the description of the embodiments:
as shown in the attached drawings 1-5, the invention relates to a camshaft toggle solenoid valve for a variable valve lift system, which comprises a shell 1, wherein an electromagnetic coil 2 is arranged in the shell 1, an Erlenmeyer 3 is arranged in the electromagnetic coil 2, a magnetic core body 4 is arranged in the Erlenmeyer 3, the magnetic core body 4 is connected with a driving rod 5, a strong magnet 6 is arranged at one end of the shell 1, and the magnetic core body 4 is close to the strong magnet 6. The camshaft shifting electromagnetic valve for the variable valve lift system is characterized in that a strong magnet 6 of the camshaft shifting electromagnetic valve is arranged to be of an axial magnetizing structure, a magnetic conductive gasket 7 is arranged on the strong magnet 6, and a strong magnet magnetic circuit 8 is formed when the strong magnet 6 and the magnetic conductive gasket 7 are attracted. The camshaft toggle electromagnetic valve for the variable valve lift system comprises a driving rod adsorption locking unit, a power-on attenuation magnetic unit, a driving rod pushing-out unit and a driving rod position feedback unit. The driving rod adsorption locking unit comprises a strong magnet 6 and a magnetic conduction gasket 7, the power-on attenuation magnetic unit comprises a shell 1, an electromagnetic coil 2, an early sleeve 3 and a magnetic core body 4, the driving rod pushing unit comprises a compression spring 10 and a spring seat 11, and the driving rod position feedback unit comprises a magnetic ring 12 and a Hall sensor. The driving rod adsorption locking unit comprises a strong magnet 6 magnetized axially, a magnetic conductive gasket 7 and a strong magnet magnetic circuit 8. The ferromagnetic circuit 8 is made of magnetic conductive material, and at the initial step position of the driving rod, the ferromagnetic is contacted with the magnetic conductive gasket in an attracting way to form a closed ferromagnetic circuit 8, so that the ferromagnetic is adsorbed and locked on the driving rod through the magnetic conductive gasket, the driving rod is in a contraction state at the moment, and the power-on attenuation magnetic unit comprises a shell 1, an electromagnetic coil 2, an early sleeve 3 and a magnetic core body 4. When the driving rod is required to be matched with the track groove on the camshaft to push the camshaft to realize axial movement, the control part is used for electrifying the electromagnetic coil. At this time, the solenoid magnetic circuit of the solenoid 2 is overlapped and reversed with the ferromagnetic magnetic circuit 8, and the position of the magnetic conductive gasket is branched, so that the adsorption action of the ferromagnetic to the magnetic core body through the magnetic conductive gasket is weakened under the action of the reverse magnetic flux generated by electrifying the solenoid. Under the effect of the power-on attenuation magnetic unit, the locking force applied by the driving rod adsorption locking unit is smaller than the spring elasticity of the compression spring, so that the driving rod is pushed out, the driving rod extends out, the driving rod acts on the camshaft in the track groove acting on the camshaft, and the driving rod acts on the camshaft and applies axial force to drive the camshaft to move axially. Thus, the switching control of the high and low cams is effectively realized. The camshaft shifting electromagnetic valve for the variable valve lift system has a simple structure, and can reliably realize the extension and contraction of the driving rod, so that the axial shifting control of the camshaft is effectively realized through the driving rod under the control of the control part and under the specific working condition of an engine, and the switching of high and low cams is realized through the matching of the extended driving rod and a track groove on the camshaft, and the overall performance of the engine is improved.
Fig. 6 to 10 are schematic structural views of embodiment 2 of a camshaft toggle solenoid valve for a variable valve lift system according to the present invention. The strong magnet 6 of the camshaft shifting electromagnetic valve for the variable valve lift system is of a radiation magnetizing structure, the strong magnet 6 is arranged at one end of an outer sleeve 3 in an electromagnetic coil 2, and a magnetic conduction stamping cover plate 14 is arranged at the position, close to a shell 1, of the other end of the outer sleeve 3. The driving rod adsorption locking unit comprises a strong magnet 6 and a magnetic conduction stamping cover plate 14, the power-on attenuation magnetic unit comprises a shell 1, an electromagnetic coil 2, an early sleeve 3 and a magnetic core body 4, the driving rod pushing unit comprises a compression spring 10 and a spring seat 11, and the driving rod position feedback unit comprises a magnetic ring 12 and a Hall sensor. The driving rod adsorption locking unit comprises a strong magnet 6 magnetized axially, a magnetic conductive gasket 7 and a strong magnet magnetic circuit 8. Above-mentioned structure, at the initial rank position of actuating lever (being in the shrink state promptly), the contact of strong magnet 6 and magnetic conduction punching press apron constitutes closed strong magnet magnetic circuit 8, and like this, the strong magnet passes through magnetic conduction punching press apron and adsorbs the locking actuating lever for the actuating lever is in the shrink state. The radiation-magnetized strong magnet of the present invention may be in the shape of a ring, as shown in fig. 8. The function of the invention can be realized by arranging fan-shaped radial magnetizing magnets on the circumference.
When the control part controls the circuit of the electromagnetic coil 2 to be communicated, the magnetic circuit of the electromagnetic coil 2 is set to be a structure which can be superposed and inverted with the magnetic circuit 8 of the strong magnet. When the control part controls the circuit communication of the electromagnetic coil 2, the magnetic circuit of the electromagnetic coil 2 is set to be a structure which can be branched with the strong magnetic circuit 8 at the position of the magnetic conductive gasket 7. According to the structure, after the electromagnetic coil is electrified, the electromagnetic coil magnetic circuit is superposed and reversed with the strong magnet magnetic circuit 8, and the magnetic conductive gasket is forked, so that under the action of reverse magnetic flux generated by electrifying the electromagnetic coil, the adsorption effect of the strong magnet on the magnetic core body through the magnetic conductive gasket is weakened, the locking force applied by the driving rod adsorption locking unit is smaller than the spring elastic force of the compression spring, the locking force of the driving rod adsorption locking unit can be overcome, the extension of the driving rod is realized, at the moment, the extended driving rod is inserted into the track groove on the camshaft, and the driving force which can move along the curve of the track groove is applied to the camshaft, so that the axial movement of the camshaft is realized.
The camshaft toggle electromagnetic valve for the variable valve lift system further comprises a compression spring 10 and a spring seat 11, the spring seat 11 is installed on the driving rod 5, one end of the compression spring 10 abuts against the outer sleeve 3, and the other end of the compression spring 10 abuts against the spring seat 11. Above-mentioned structure, actuating lever release unit includes that compression spring and spring holder constitute, wherein is equipped with the magnetic ring that can respond to the actuating lever position in the spring holder, and compression spring main aspects butt is at the lower extreme of early cover, and early cover and spindle nose interference fit. Under the action of the electrified attenuation magnetic unit, the adsorption locking force is smaller than the elastic force of the spring, so that the driving rod is pushed out, and the driving rod extends out to act on the camshaft.
The camshaft toggle electromagnetic valve for the variable valve lift system comprises a spring seat 11, a magnetic ring 12 capable of sensing the position of a driving rod 5 is installed in the spring seat 11, a shaft head part 13 is arranged on a shell 1, one end of the driving rod 5 movably penetrates through the shaft head part 13 to extend to the outside of the shell 1, and a Hall sensor is installed in the shaft head part 13. Above-mentioned structure, the realization of actuating lever position feedback unit function is through the change output different voltage signal of hall sensor response magnetic flux, and the magnetic ring moves along with the actuating lever, and hall sensor installs in the axle head portion, and the actuating lever passes the axle head portion, and the motion of magnetic ring arouses that magnetic field intensity changes, and different magnetic field intensity hall sensor can output different voltage signal. Therefore, the sensed signals can be fed back to the control part, and real-time acquisition of the signals is realized.
The shell 1 comprises a shaft head part 13, a spring groove 15 and a sensor groove 16 are arranged on the shaft head part 13, the driving rod 5 movably penetrates through the spring groove 15, and the Hall sensor is arranged in the sensor groove 16. The structure and the function of the driving rod position feedback unit are realized by outputting different voltage signals through the change of the magnetic flux induced by the Hall sensor, the magnetic ring moves along with the driving rod, the Hall sensor is arranged inside the shaft head part, and the shaft head part is composed of a spring groove and a sensor groove as shown in figure 5. The drive rod passes through the spring groove, the spring seat and the magnetic ring move in the spring groove along with the drive rod, and the Hall sensor is assembled in the sensor groove and fixed. The movement of the magnetic ring causes the change of the magnetic field intensity, and the Hall sensors with different magnetic field intensities can output different voltage signals. Therefore, the sensed signals can be fed back to the control part, and real-time acquisition of the signals is realized.
The camshaft toggle electromagnetic valve for the variable valve lift system comprises a driving rod adsorption locking unit, a power-on attenuation magnetic unit, a driving rod pushing-out unit and a driving rod position feedback unit. The driving rod adsorption locking unit comprises a strong magnet 6 and a magnetic conduction gasket 7 or a magnetic conduction stamping cover plate 14, the power-on attenuation magnetic unit comprises a shell 1, an electromagnetic coil 2, an outer sleeve 3 and a magnetic core body 4, the driving rod pushing unit comprises a compression spring 10 and a spring seat 11, and the driving rod position feedback unit comprises a magnetic ring 12 and a Hall sensor. According to the structure, each camshaft shifting electromagnetic valve for the variable valve lift system can comprise a driving rod adsorption locking unit, an energization attenuation magnetic unit, a driving rod pushing-out unit and a driving rod position feedback unit, and also can comprise a plurality of driving rod adsorption locking units, a plurality of energization attenuation magnetic units, a plurality of driving rod pushing-out units and a plurality of driving rod position feedback units, so that the rapid switching of different cams of a multi-stage camshaft is realized, and the requirements of engines of different models and different sizes are met.
In embodiment 2 of the camshaft shifting solenoid valve for a variable valve lift system according to the present invention, the energization-attenuating magnetic unit includes, as shown in fig. 9, an electromagnetic coil and an electromagnetic coil magnetic circuit, which are energized to generate a reverse magnetic flux. The magnetic circuit of the electromagnetic coil is superposed and opposite to the strong magnetic circuit 8 of the drive rod adsorption locking unit, so that under the action of reverse magnetic flux generated by electrifying the electromagnetic coil, the adsorption action of the strong magnet on the magnetic core body through the magnetic conduction stamping cover is weakened, and the extension of the drive rod is realized.
In embodiment 2 of the camshaft toggle solenoid valve for a variable valve lift system, the driving rod pushing unit is shown in fig. 10 and comprises a compression spring seat, wherein a magnetic ring for sensing the position of the driving rod is assembled in the spring seat, the large end of the compression spring abuts against the lower end of an Erlenmeyer, and the Erlenmeyer is in interference fit with a shaft head. Under the action of the electrified magnetic force attenuation unit, the adsorption locking force of the adsorption locking unit of the driving rod is smaller than the elastic force of the spring, so that the driving rod is pushed out.
In embodiment 2 of the camshaft shifting solenoid valve for a variable valve lift system, the driving rod position feedback unit outputs different voltage signals by sensing the change of magnetic flux through the hall sensor, the magnetic ring moves along with the driving rod, the hall sensor is installed in the shaft head part, and the shaft head part comprises a spring groove and a sensor groove. The driving rod penetrates through the spring groove, the spring seat and the magnetic ring move in the spring groove along with the driving rod, and the sensor is assembled in the sensor groove and fixed. The magnetic ring moves to cause the change of the magnetic field intensity, and the Hall sensors with different magnetic field intensities can output different voltage signals.
The camshaft shifting electromagnetic valve for the variable valve lift system comprises a driving rod adsorption locking unit, an electrifying attenuation magnetic unit, a driving rod pushing-out unit and a driving rod position feedback unit. The drive rod adsorption locking unit comprises a strong magnet and a magnetic conduction gasket or a magnetic conduction stamping cover plate, the power-on attenuation magnetic unit comprises a shell, an electromagnetic coil, an Eryu sleeve and a magnetic core body, the drive rod pushing unit comprises a compression spring and a spring seat, and the drive rod position feedback unit comprises a magnetic ring and a Hall sensor. The driving rod adsorption locking unit comprises an axially magnetized strong magnet, a magnetic conduction gasket and a strong magnet circuit. The ferromagnetic circuit is composed of a magnetic conductive material, and at the initial order position of the driving rod, the ferromagnetic is in attraction contact with the magnetic conductive gasket to form a closed ferromagnetic circuit, so that the ferromagnetic adsorbs and locks the driving rod through the magnetic conductive gasket, the driving rod is in a contraction state at the moment, and the power-on attenuation magnetic unit comprises a shell, an electromagnetic coil, an iron sleeve and a magnetic core body. When the driving rod is required to be matched with the track groove on the camshaft to push the camshaft to realize axial movement, the control part is used for electrifying the electromagnetic coil. At this time, the magnetic circuit of the electromagnetic coil is superposed and opposite to the magnetic circuit of the strong magnet, and the magnetic conductive gasket is branched, so that under the action of the reverse magnetic flux generated by electrifying the electromagnetic coil, the adsorption action of the strong magnet on the magnetic core body through the magnetic conductive gasket is weakened. Under the effect of the power-on attenuation magnetic unit, the locking force applied by the driving rod adsorption locking unit is smaller than the spring elasticity of the compression spring, so that the driving rod is pushed out, the driving rod extends out, the driving rod acts on the camshaft in the track groove acting on the camshaft, and the driving rod acts on the camshaft and applies axial force to drive the camshaft to move axially. Therefore, switching control of the high-low cam is effectively realized, and the accuracy is high. The camshaft shifting electromagnetic valve for the variable valve lift system has a simple structure, and can reliably realize the extension and contraction of the driving rod, so that the axial shifting control of the camshaft is effectively realized through the driving rod under the control of the control part and under the specific working condition of an engine, and the switching of high and low cams is realized through the matching of the extended driving rod and a track groove on the camshaft, and the overall performance of the engine is improved.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, changes and equivalents of the embodiments of the invention, and its application to other applications without departing from the spirit and scope of the invention.
Claims (7)
1. A camshaft stirs solenoid valve for variable valve lift system which characterized in that: the electromagnetic coil is characterized by comprising a shell (1), wherein an electromagnetic coil (2) is arranged in the shell (1), an iron sleeve (3) is arranged in the electromagnetic coil (2), a magnetic core body (4) is arranged in the iron sleeve (3), the magnetic core body (4) is connected with a driving rod (5), a strong magnet (6) is arranged at one end of the shell (1), and the magnetic core body (4) is close to the strong magnet (6);
the variable valve lift system is characterized in that a strong magnet (6) of the camshaft shifting electromagnetic valve is arranged into an axial magnetizing structure, a magnetic conductive gasket (7) is arranged on the strong magnet (6), and a strong magnet magnetic path (8) is formed when the strong magnet (6) and the magnetic conductive gasket (7) are attracted;
when the control part controls the circuit of the electromagnetic coil (2) to be communicated, the magnetic circuit of the electromagnetic coil (2) is arranged into a structure which can be superposed and reversed with the strong-magnetism magnetic circuit (8);
when the control part controls the circuit of the electromagnetic coil (2) to be communicated, the magnetic circuit of the electromagnetic coil (2) is set to be a structure which can be branched with the strong magnetic circuit (8) at the position of the magnetic conductive gasket (7).
2. The camshaft toggle solenoid valve for a variable valve lift system according to claim 1, wherein: the cam shaft poking electromagnetic valve used for the variable valve lift system is characterized in that a strong magnet (6) is arranged to be of a radiation magnetizing structure, the strong magnet (6) is arranged at one end of an outer sleeve (3) in an electromagnetic coil (2), and a magnetic conduction stamping cover plate (14) is arranged at the position, close to a shell (1), of the other end of the outer sleeve (3).
3. The camshaft toggle solenoid valve for a variable valve lift system according to claim 1 or 2, characterized in that: the camshaft poking electromagnetic valve for the variable valve lift system further comprises a compression spring (10) and a spring seat (11), the spring seat (11) is installed on the driving rod (5), one end of the compression spring (10) abuts against the outer sleeve (3), and the other end of the compression spring (10) abuts against the spring seat (11).
4. The camshaft toggle solenoid valve for a variable valve lift system according to claim 1 or 2, characterized in that: the camshaft poking electromagnetic valve for the variable valve lift system comprises a spring seat (11), a magnetic ring (12) capable of sensing the position of a driving rod (5) is installed in the spring seat (11), a shaft head portion (13) is arranged on a shell (1), one end of the driving rod (5) movably penetrates through the shaft head portion (13) to extend to the outside of the shell (1), and a Hall sensor is installed in the shaft head portion (13).
5. The camshaft toggle solenoid valve for a variable valve lift system according to claim 1 or 2, characterized in that: the shell (1) comprises a shaft head part (13), a spring groove (15) and a sensor groove (16) are formed in the shaft head part (13), the driving rod (5) movably penetrates through the spring groove (15), and the Hall sensor is installed in the sensor groove (16).
6. The camshaft toggle solenoid valve for a variable valve lift system according to claim 1 or 2, characterized in that: the camshaft toggle electromagnetic valve for the variable valve lift system comprises a driving rod adsorption locking unit, a power-on attenuation magnetic unit, a driving rod pushing-out unit and a driving rod position feedback unit.
7. The camshaft toggle solenoid valve for a variable valve lift system according to claim 6, wherein: the drive rod adsorption locking unit comprises a strong magnet (6), a magnetic conduction gasket (7) or a magnetic conduction stamping cover plate (14), the power-on attenuation magnetic unit comprises a shell (1), an electromagnetic coil (2), an outer sleeve (3) and a magnetic core body (4), the drive rod pushing unit comprises a compression spring (10) and a spring seat (11), and the drive rod position feedback unit comprises a magnetic ring (12) and a Hall sensor.
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| CN202010146418.9A CN111335979B (en) | 2020-03-04 | 2020-03-04 | Camshaft toggle electromagnetic valve for variable valve lift system |
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| CN202010146418.9A CN111335979B (en) | 2020-03-04 | 2020-03-04 | Camshaft toggle electromagnetic valve for variable valve lift system |
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| CN111335979B true CN111335979B (en) | 2021-05-25 |
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| CN111335979A (en) | 2020-06-26 |
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