CN109469689A - A kind of step motor type automobile clutch - Google Patents
A kind of step motor type automobile clutch Download PDFInfo
- Publication number
- CN109469689A CN109469689A CN201811598458.6A CN201811598458A CN109469689A CN 109469689 A CN109469689 A CN 109469689A CN 201811598458 A CN201811598458 A CN 201811598458A CN 109469689 A CN109469689 A CN 109469689A
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- Prior art keywords
- clutch
- valve
- signal
- sensor
- stepper motor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D28/00—Electrically-actuated clutches
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The present invention provides a kind of step motor type automobile clutches, it is not on the basis of changing manual clutch executing agency, by installing sensor and electronic control unit additional, and control mechanism is changed to the pressure regulator valve of step motor type, driver intention and vehicle-state are fed back by sensor, then according to the hydraulic pressure in the status adjustment clutch actuating mechanism of clutch needs, and then the specific speed of the activating pressure of clutch principal and subordinate Moving plate, the transmitting for controlling clutch moment of torque, principal and subordinate's Moving plate is controlled, complete the control to clutch.This clutch solves the problems, such as that conventional clutch power-assisted is cumbersome, clutch abrasion can be removed and influence that clutch moment of torque is transmitted in diaphragm spring fatigue deformation, it can be effectively improved the working performance of clutch in conjunction with the intention of driver and the driving status of vehicle, the clutch control mechanism of the difficulty of clutch control, the control precision for improving clutch can be reduced.
Description
Technical field
The present invention relates to the clutch apparatus of automobile, a kind of specifically step using stepper motor as control unit
Into electric motor type automobile clutch.
Background technique
Clutch is a kind of equipment all referred in various vehicles, it is mounted between engine and speed changer,
It is the total member being directly associated with engine in automotive transmission, is to cut off and transmit between engine and automotive transmission to move
The component of power.
The peak torque of clutch transmitting engine is to engage to realize by clutch, and shift of transmission is by complete
What separation was realized, clutch guarantees the gentle start of automobile energy and prevents power train overload to be by the driving and driven part of clutch
Cunning rubs to realize.
When carrying out quantitative assessment to the starting-up process of vehicle, what is proposed objectively evaluates index mainly and has clutch starting to connect
It closes time, shock extent and compares work of slipping.Wherein, clutch starting engaging time is that starting instruction is issued from controller to clutch
Spent duration until being fully engaged, start-up time is as far as possible on the basis of starting is smooth for good starting quality requirements
It is short；Shock extent is derivative of the longitudinal acceleration of the vehicle to the time, and shock extent is directly proportional to output torque change rate, and output torque becomes
Dynamic faster, transmission system impact is bigger, and shock extent preferably reflects the thermodynamic nature in starting shift process, and shock extent can
It ties up to and changes and the motion state of vehicle to be truly reflected starting shift process vehicle transmission；The work of slipping of clutch is
Refer to how many mechanical energy becomes thermal energy in clutch cohesive process, characterizes the severity of clutch friction surface abrasion, and
It is work of slipping and clutch friction area ratio than work of slipping.
Slip clutch job control index is mainly embodied by the binding capacity of clutch and in conjunction with speed, it is not only
There is very big causality to the service life of clutch, and the engagement amount of clutch and engaging speed want driver experience
Also relatively high or even clutch engagement amount and engaging speed is asked to directly affect the starting stationarity and shift fluency of vehicle.
Summary of the invention
The present invention provides a kind of step motor type automobile clutches, it is in the base for not changing manual clutch executing agency
On plinth, by installing sensor and electronic control unit additional, and control mechanism is changed to the pressure regulator valve of step motor type, passes through sensor
Driver intention and vehicle-state are fed back, then according in the status adjustment clutch actuating mechanism of clutch needs
Hydraulic pressure, and then control the activating pressure of clutch principal and subordinate Moving plate, control the ratio of the transmitting of clutch moment of torque, principal and subordinate's Moving plate
Revolving speed completes the control to clutch.
And instructed by being issued after electronic control unit progress data calculating to stepper motor pressure regulator valve, clutch hydraulic pressure is separated
Device carries out hydraulic regulation to realize the control to clutch.
The present invention realizes that above-mentioned purpose uses following technical scheme:
A kind of step motor type automobile clutch, it includes sensor, clutch electronic control unit, actuator and clutch.
The sensor is collected driver intention information, and is collected to the signal of each part of vehicle position,
It is then passed to clutch electronic control unit, clutch electronic control unit sends corresponding instructions to execution after handling signal
Device controls clutch by actuator；Clutch is equipped with hydraulic cylinder, and hydraulic cylinder is connected to the separation on clutch and dials
Fork, actuator control realizing the control to clutch to the flexible of hydraulic cylinder；The actuator is stepper motor
Pressure regulator valve.
Sensor signal collected includes control signal and feedback signal.
The control signal includes clutch pedal position, throttle position, engine speed, transmission input shaft turn
Speed, speed；The feedback signal includes the driving and driven disk rotating speed of clutch than the position with master and slave Moving plate；The acquisition of signal by
Corresponding sensor is completed.
The corresponding sensor of the clutch pedal is the position sensor of potentiometer type, by two contactless linear potentials
Device sensor composition.
The stepper motor pressure regulator valve is the seat valve formula overflow valve with pilot valve, using second level concentric structure.
The stepper motor pressure regulator valve includes valve seat, main valve, pilot valve, stepper motor and lead screw；The valve seat is
Perforation is structure, and valve seat front end is equipped with fuel feed hole, and valve seat tail portion is equipped with stepper motor；Main valve is respectively set in front and back inside valve seat
And pilot valve, perforative first oil outlet and the second oil outlet, main valve are respectively equipped on main valve and the corresponding valve seat wall of pilot valve
Perforative damping hole is additionally provided at center；The relief valve seat of a loop, institute are additionally provided on valve seat between main valve and pilot valve
The relief valve seat stated is pyramidal structure, and corresponding pilot valve front is cone valve structure；Main valve and pilot valve is corresponding is equipped with
Main valve is supported to relief valve seat front by spring, main spool spring, and the axis of stepper motor is equipped with lead screw, and guide's valve spring is by guide
Valve supports on lead screw.
A kind of step motor type automobile clutch, its working method are that sensor converts the amount of movement of clutch pedal
At electric signal；Meanwhile the engine speed and transmission input shaft revolving speed that sensor is monitored are converted into a specific speed
Electric signal, the electric signal that the output characteristics and clutch pedal of the signal are exported are linear convergent rate always；Clutch is automatically controlled
Unit is compared two electric signals, such as two signal differences, illustrates that the actual engagement degree of clutch does not reach requirement,
Then clutch electronic control unit issues instruction, and control stepper motor rotation controls the decrement of pilot valve core spring, so as to cause
The change of guide valve level liquid resistance, and then reach the variation of control bound core front end system pressure, to increase or reduce clutch
Hydraulic coupling is separated, until two electric signals are identical.
The present invention has the advantages that by adopting the above technical scheme
It solves the problems, such as that conventional clutch power-assisted is cumbersome, clutch abrasion and diaphragm spring fatigue deformation pair can be removed
The influence of clutch moment of torque transmitting can be effectively improved the work of clutch in conjunction with the intention of driver and the driving status of vehicle
Performance can reduce the clutch control mechanism of the difficulty of clutch control, the control precision for improving clutch.
Detailed description of the invention
Fig. 1 is workflow schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of stepper motor pressure regulator valve,
Fig. 3 is stepper motor pressure regulator valve signal flow graph.
Specific embodiment
Below with reference to embodiment, the present invention will be further described.
A kind of step motor type automobile clutch as shown in Figure 1, it includes sensor, clutch electronic control unit, holds
Row device and clutch.
The sensor is collected driver intention information, and is collected to the signal of each part of vehicle position,
It is then passed to clutch electronic control unit, clutch electronic control unit sends corresponding instructions to execution after handling signal
Device controls clutch by actuator；Clutch is equipped with hydraulic cylinder, and hydraulic cylinder is connected to the separation on clutch and dials
Fork, the i.e. both ends of disengaging yoke respectively correspond hydraulic cylinder and release bearing, so by actuator to hydraulic cylinder stretch into
The control to clutch is realized in row control；The actuator is stepper motor pressure regulator valve.
Sensor signal collected includes control signal and feedback signal.
The control signal includes clutch pedal position, throttle position, engine speed, transmission input shaft turn
Speed, speed；The feedback signal includes the driving and driven disk rotating speed of clutch than the position with master and slave Moving plate；The acquisition of signal by
Corresponding sensor is completed.
The corresponding sensor of the clutch pedal is the position sensor of potentiometer type, by two contactless linear potentials
Device sensor composition.
The stepper motor pressure regulator valve is the seat valve formula overflow valve with pilot valve, using second level concentric structure.
As shown in Fig. 2, the stepper motor pressure regulator valve includes valve seat 1, main valve 2, pilot valve 3, stepper motor 4 and lead screw
5；The valve seat 1 is through structure, and 1 front end of valve seat is equipped with oil inlet 101, and 1 tail portion of valve seat is equipped with stepper motor 4；Valve
Main valve 2 and pilot valve 3 is respectively set in 1 inside front and back of seat, is respectively equipped on main valve 2 and corresponding 1 wall of valve seat of pilot valve 3 perforative
First oil outlet 102 and the second oil outlet 103 are additionally provided with perforative damping hole 201 at 2 center of main valve；Main valve 2 and pilot valve 3
Between valve seat 1 in be additionally provided with the relief valve seat 104 of a loop, the relief valve seat 104 is pyramidal structure, it is corresponding first
3 front of pilot valve is cone valve structure；Main valve 2 and pilot valve 3 are corresponding equipped with spring, and main spool spring 202 supports to main valve 2
The axis of 104 front of relief valve seat, stepper motor 4 is equipped with lead screw 5, and pilot valve 301 is supported to lead screw 5 by guide's valve spring 301
On.
Stepper motor pressure regulation valve type clutch system is a kind of flexible control system, eliminates the rigidity of mechanical clutch
Connection, stepper motor pressure regulation valve type clutch system composition:
(1) sensor
Clutch pedal position sensor is to reflect that driver operates the device being intended to, its core is a potentiometer type
Position sensor, which is made of two contactless linear potentiometer sensors, when clutch pedal position occurs
When variation, potentiometer resistance also linearly changes therewith.The case where clutch pedal position and its variation can thus be perceived,
And clutch pedal amount of movement is converted to electric signal and is sent to clutch electronic control unit.
The pulse frequency of induced voltage is also higher, according to the voltage pulse frequency number induced in the unit time, calculates
Rotary shaft axis revolving speed out, so that it may be converted into engine speed, transmission input shaft revolving speed, speed.
(2) clutch electronic control unit
Clutch electronic control unit acquire engine rotational speed signal and clutch driving plate signal, transmission input shaft signal and
Signal of intent of driving, speed signal and the vehicle driving of clutch driven plate signal, clutch pedal position signal and driver
Status signal.Then clutch electronic control unit controls stepper motor pressure regulator valve according to collected signal, last purpose
Reach optimal specific speed, accurately controls clutch pedal position.When driver depresses clutch pedal, clutch pedal position
It sets sensor and clutch pedal amount of movement is converted into electric signal.Meanwhile engine speed sensor and transmission input shaft turn
Fast sensor is also converted into a specific speed electric signal, output characteristics such as the sensor of clutch pedal position, and
For linear convergent rate, the two electric signals are sent into clutch electronic control unit simultaneously, are compared, if two signal differences, explanation
The actual engagement degree of clutch does not reach requirement, then clutch electronic control unit issues a control signal, controls stepper motor
Pressure regulator valve is along positive direction (increasing clutch separation hydraulic coupling) or opposite direction (reducing clutch separation hydraulic coupling) rotation, until two
Until a electric signal is identical.Improve the starting and shift performance of vehicle.Stepper motor pressure regulator valve clutch system rises in vehicle
Clutch conjugation grade can accurately be controlled under step and shift, keep vehicle start more steady, while also reducing clutch
The abrasion of device principal and subordinate's Moving plate.
(3) actuator
The shock extent of clutch and the change rate of gearbox output torque are related, than the torque of unit friction work and clutch transmitting
And the angular speed of master and slave movable plate is related.For specific clutch system, since the running parameter of its clutch is certain, clutch
The size that device transmits torque is only related with the pressing force of clutch, therefore stepper motor pressure regulator valve is clutch electrohydraulic control system
In important control element, characteristic influences the working performance of system very big.Stepper motor pressure regulator valve is to utilize stepper motor
As a kind of digital control proportioning valve of electronics-machinery-liquid pressure transducer.As shown in figure 3, stepper motor receives pulse train
Control, output displacement corner, corner is directly proportional to the umber of pulse of input, then corner is become the displacement of spool, using
Pilot stage and the amplification of power stage 2-level hydraulic, output hydraulic pressure parameter.In electrically controlled clutch system, the engaging speed of clutch is
It is determined by the revolving speed of the stepper motor of control mechanism.Clutch engagement and stepper motor revolving speed are linear.And it walks
The direction of motion of clutch driven plate is equally also determined into the direction of number of motor steps.
Stepper motor pressure regulator valve is mainly the decrement for using step motor control pilot valve core spring, so as to cause guide
The change of valve grade liquid resistance, and then reach the variation of control bound core front end system pressure, it is achieved in the adjusting of pressure.Stepping electricity
The straight-line displacement of machine is directly proportional to umber of pulse, and in control, digital pulse signal is generated by computer or single-chip microcontroller, control output
Pressure adjusting can be realized in umber of pulse.
Stepper motor pressure regulator valve is the seat valve formula overflow valve with pilot valve requires main valve using second level concentric structure
Core cylindrical surface and lower end cone face and main valve body cooperate.Overflow valve port uses the good cone valve structure of leakproofness, substantially zeroed opening
State, which improve the static characteristics of valve, reduce pressure overshoot, and pressure oil enters the ante-chamber of main valve plug from oil inlet, pass through
Damping hole enters the back cavity i.e. pilot valve ante-chamber of main valve plug, acts in pilot valve.When system pressure is not enough to overcome guide
When valve spring reset force, pilot valve is remained turned-off, and pressure oil does not flow in valve, and pressure is equal before and after damping hole, due to main valve plug
Left side compression area is greater than right side compression area, so main valve plug keeps closing under active force difference and spring restoring force effect
It closes.When system pressure is increased to more than pilot valve cracking pressure, pilot valve is opened, and pressure oil overflows through damping hole through pilot valve
Out, fuel tank is returned to through the second oil outlet.When spillway discharge is small, the pressure difference before and after damping hole is small, at this time in main valve plug left and right side
Product moment generate hydraulic coupling be also not enough to overcome main spool spring reset force and open main valve plug, at this time main valve enclose oil inlet and
Channel between first oil outlet.When system pressure increases to set pressure, pilot valve opening continues to increase, and spillway discharge increases
Add, flow through the increase of pressure drop caused by damping hole, the hydraulic coupling generated to main valve plug left and right side product moment is enough to open main valve plug, oil
Liquid portals through first returns to fuel tank, and here it is stepper motor pressure regulator valve opening processes.The opening process of stepper motor pressure regulator valve is just
It is process of the stepper motor pressure regulator valve according to pilot valve position pressure regulation.
Pressure is minimum state at oil inlet when clutch fully engaged condition, and clutch actuating mechanism is hydraulic at this time
The cylinder piston is in contraction state, and clutch principal and subordinate Moving plate will be fully engaged.Hydraulic oil flowing through channel at this time first is that from oil
Case-the-the first oil outlet of hydraulic pump fuel feed hole-fuel tank, hydraulic oil flowing through channel second is that from fuel tank-hydraulic pump fuel feed hole-damping
Hole-the-the second oil outlet of guide's valve chamber-fuel tank.Pressure is maximum rating at oil inlet when clutch is kept completely separate state, at this time
The hydraulic cylinder piston of clutch actuating mechanism is in elongation state, and clutch principal and subordinate Moving plate will be kept completely separate.At this time hydraulic
Oily flowing through channel is fuel tank-hydraulic pump-fuel tank.Pressure when clutch slipping state at oil inlet is in minimum state and most
Between big state.This is specifically which state needs to drive meaning in acquisition vehicle-state and driver according to clutch electronic control unit
The instruction issued after figure.The hydraulic piston of clutch is in some state of elongation state at this time.Hydraulic oil at this time flows through way
Diameter first is that from fuel tank-the-the first oil outlet of hydraulic pump fuel feed hole-fuel tank.Hydraulic oil flowing through channel second is that from fuel tank-hydraulic pump
Fuel feed hole-damping hole-the-the second oil outlet of guide's valve chamber-fuel tank.The hydraulic oil of the two approach is only flowed through as clutch connects
The increase of resultant and increase.
The hydraulic cylinder actuators of stepper motor proportional dump valve clutch are in conventional clutch release bearing and separation
Improved on the basis of shift fork, hydraulic cylinder piston is the opposite end for acting on disengaging yoke and combining with release bearing.In this way
Not only it can guarantee the precision of clutch system control, but also the difficulty of control can be reduced.
The present apparatus also needs to be used in conjunction with equipment such as existing technologies such as hydraulic pump, hydraulic oil container in actual use,
Wherein stepper motor pressure regulator valve is a part in the hydraulic system specifically executed.
Claims (7)
1. a kind of step motor type automobile clutch, it includes sensor, clutch electronic control unit, actuator and clutch,
Be characterized in that: the sensor is collected driver intention information, and is collected to the signal of each part of vehicle position,
It is then passed to clutch electronic control unit, clutch electronic control unit sends corresponding instructions to execution after handling signal
Device controls clutch by actuator；Clutch be equipped with hydraulic cylinder, the actuator to hydraulic cylinder stretch into
Row control is to realize the control to clutch；The actuator is stepper motor pressure regulator valve.
2. a kind of step motor type automobile clutch according to claim 1, it is characterised in that: the sensor is adopted
The signal of collection includes control signal and feedback signal.
3. a kind of step motor type automobile clutch according to claim 2, it is characterised in that: the control signal packet
Include clutch pedal position, throttle position, engine speed, transmission input shaft revolving speed, speed；The feedback signal packet
The driving and driven disk rotating speed of clutch is included than the position with master and slave Moving plate；The acquisition of signal is completed by corresponding sensor.
4. a kind of step motor type automobile clutch according to claim 3, it is characterised in that: the clutch pedal pair
The sensor answered is the position sensor of potentiometer type, is made of two contactless linear potentiometer sensors.
5. a kind of step motor type automobile clutch according to claim 4, it is characterised in that: the stepper motor tune
Pressure valve is the seat valve formula overflow valve with pilot valve, using second level concentric structure.
6. a kind of step motor type automobile clutch according to claim 5, it is characterised in that: the stepper motor tune
Pressure valve includes valve seat, main valve, pilot valve, stepper motor and lead screw；The valve seat is that perforation is structure, and valve seat front end is equipped with
Fuel feed hole, valve seat tail portion are equipped with stepper motor；Main valve and pilot valve is respectively set in front and back inside valve seat, and main valve and pilot valve are corresponding
Valve seat wall on be respectively equipped with perforative first oil outlet and the second oil outlet, be additionally provided with perforative damping hole at main valve center；
The relief valve seat of a loop is additionally provided on valve seat between main valve and pilot valve, the relief valve seat is pyramidal structure, phase
The pilot valve front answered is cone valve structure；Main valve and pilot valve are corresponding equipped with spring, and main spool spring supports to main valve
The axis of relief valve seat front, stepper motor is equipped with lead screw, and guide's valve spring supports to pilot valve on lead screw.
7. a kind of step motor type automobile clutch, it is characterised in that: its working method is sensor by clutch pedal
Amount of movement is converted into electric signal；Meanwhile the engine speed and transmission input shaft revolving speed that sensor is monitored being converted into
One specific speed electric signal, the electric signal that the output characteristics and clutch pedal of the signal are exported are linear convergent rate always；
Clutch electronic control unit is compared two electric signals, such as two signal differences, illustrates that the actual engagement degree of clutch does not have
Have and reach requirement, then clutch electronic control unit issues instruction, and control stepper motor rotation controls the compression of pilot valve core spring
Amount and then reaches the variation of control bound core front end system pressure so as to cause the change of guide valve level liquid resistance, to increase or
Reduce clutch separation hydraulic coupling, until two electric signals are identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598458.6A CN109469689B (en) | 2018-12-26 | 2018-12-26 | Stepping motor type automobile clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598458.6A CN109469689B (en) | 2018-12-26 | 2018-12-26 | Stepping motor type automobile clutch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109469689A true CN109469689A (en) | 2019-03-15 |
| CN109469689B CN109469689B (en) | 2023-10-13 |
Family
ID=65677009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811598458.6A Active CN109469689B (en) | 2018-12-26 | 2018-12-26 | Stepping motor type automobile clutch |
Country Status (1)
| Country | Link |
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| CN (1) | CN109469689B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113515156A (en) * | 2021-07-12 | 2021-10-19 | 安徽农业大学 | Tractor PTO control system and method based on multi-plate clutch |
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| Publication number | Publication date |
|---|---|
| CN109469689B (en) | 2023-10-13 |
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