CN201093021Y - Closed-loop air-actuated on-off control system based on high speed switch valve - Google Patents
Closed-loop air-actuated on-off control system based on high speed switch valve Download PDFInfo
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- CN201093021Y CN201093021Y CNU2007200260485U CN200720026048U CN201093021Y CN 201093021 Y CN201093021 Y CN 201093021Y CN U2007200260485 U CNU2007200260485 U CN U2007200260485U CN 200720026048 U CN200720026048 U CN 200720026048U CN 201093021 Y CN201093021 Y CN 201093021Y
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- clutch
- switch valve
- speed switch
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Abstract
The utility model discloses a closed-cycle pneumatic clutching controlling system, which solves the problem that a variable speed system of a heavy-duty car has high cost, complex structure, easy damage and the like. The closed-cycle pneumatic clutching controlling system has the advantages of low cost and simple structure, which can carry out accurate clutching control, the structure is that the utility model provided with a clutch, which comprises a manual shift gear device and an automatic shift gear device, wherein the manual shift gear device comprises a sensing circuit on a clutch pedal, the circuit is connected with a controlling circuit, the automatic shift gear device comprises the controlling device, output end portions of the manual shift gear device and the automatic shift gear device are connected with a pneumatic device, the output end of the pneumatic device is connected with a displacement detecting device of the clutch, and the output feedback of the device is connected with the controlling circuit.
Description
Technical field
The utility model relates to a kind of actuator of clutch, particularly relate to a kind of automated mechanical transmission field that is applied to heavy-duty car, it can realize the closed loop air clutch control system based on high-speed switch valve of the accurate control of clutch position in the automatic shifting system.
Background technique
Along with the fast development of automobile quantity and the rapid increase of amateur driver's quantity, automatic gearbox is just presenting fast development trend.Present automatic gearbox mainly contains hydraulic mechanical type automatic transmission (AT), stepless speed variator (CVT), and three kinds of electric control mechanical type automatic speed variators (AMT).Wherein electric control mechanical type automatic speed variator (AMT) is on the basis of conventional manual clutch, application electric technology and automatic speed changing theory, with electronic control unit (ECU) is core, separation by the actuating mechanism controls clutch with combine, select gear-change operation and, realize starting by electric control device control accelerator open degree, brake, the automatic operation of gear shift.
The electric control clutch operating mechanism that extensively adopts on the car is hydraulic drive mechanism or motor-driven mechanism.For heavy-duty car, owing to need the moment of torsion of transmission very big, so the rigidity of clutch thrust spring is very big; On the other hand, in order to reduce the time that the shift process medium power interrupts, the action that clutch control requires is also very fast; So the power of heavy automobile clutch operating mechanism driver element must be very big.If adopt motor driven systems, generator power is limited on the heavy-duty car, is not enough to offer so big power of motor, and therefore, it is unaccommodated adopting motor driving.At present, the electrically controlled clutch system that is applied to car adopts hydraulic driving more, and is different with car, and heavy-duty car does not have oil hydraulic pump usually, if use hydraulic driving system can cause fringe cost.High pressurized gas is all arranged on the heavy-duty car, and many operating mechanisms also all are to adopt air assisted, and traditional pneumatic servo control system uses expensive servovalve or Proportional valve as control unit more, and this makes that the cost of system is very high.
Summary of the invention
The purpose of this utility model is exactly in order to solve the speed variator system cost height of present heavy-duty car, complex structure, problem such as fragile provides that a kind of to have a cost low, simple in structure, can carry out the closed loop air clutch control system based on high-speed switch valve of advantages such as clutch for clutch control fast, accurately.
For achieving the above object, the utility model adopts following technological scheme:
A kind of closed loop air clutch control system based on high-speed switch valve, it comprises clutch, and clutch is made up of manual device and automatic transmission device, and described manual device comprises the sensing circuit that the clutch pedal place is provided with, and this circuit is connected with control circuit; The automatic transmission device comprises control circuit, manually all is connected with Pneumatic actuator with the output terminal of automatic transmission, and the output terminal of Pneumatic actuator connects with the clutch displacement detector, and the output feedback of this device is connected to control circuit.
Sensing circuit comprises the clutch pedal sensor in the described manual device, and this sensor connects with A/D convertor circuit, the output terminal connection control circuit of A/D convertor circuit.
Control circuit and the control circuit in the manual device in the described automatic transmission device are same circuit, are ECU logic control chip; Pneumatic actuator comprises the source of the gas that has high-speed switch valve, the output termination high-speed switch valve of ECU logic control chip, source of the gas also is connected with the air assisted cylinder, the piston of air assisted cylinder is connected with the clutch displacement detector, this device is displacement transducer, the output terminal feedback of displacement transducer is connected to ECU logic control chip input end, forms closed loop and connects.
Described high-speed switch valve is the PWM modulation system, and switch periods is constant to be 10ms, and output flow is proportional to t
p
Described ECU logic control chip model is DSP2407A.
The utility model proposes a kind of closed loop pneumatic clutch control system based on high-speed switch valve.It provides a kind of work accurately and reliably for the moving AMT system of heavy Automobile air, carries out rapidly, in conjunction with electric control clutch control system stably.
The beneficial effects of the utility model are: with high-speed switch valve control unit as an alternative, reduced system cost effectively, and can realize Clutch Control fast, accurately.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Wherein, 1. clutch pedal sensor, 2.AD change-over circuit, 3.ECU logic control chip, 4. high-speed switch valve, 5. source of the gas, 6. air assisted cylinder, 7. piston, 8. displacement transducer.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
Among Fig. 1, clutch is made up of manual device and automatic transmission device, and sensing circuit comprises clutch pedal sensor 1 in the wherein manual device, and this sensor connects with A/D convertor circuit 2, the output terminal connection control circuit of A/D convertor circuit 2.
Control circuit in the automatic transmission device is an ECU logic control chip 3; Pneumatic actuator comprises the source of the gas 5 that has high-speed switch valve 4, the output termination high-speed switch valve 4 of ECU logic control chip 3, source of the gas 5 also is connected with air assisted cylinder 6, the piston 7 of air assisted cylinder 6 is connected with the clutch displacement detector, this device is displacement transducer 8, the output terminal feedback of displacement transducer 8 is connected to ECU logic control chip 3 input ends, forms closed loop and connects.High-speed switch valve 4 is the PWM modulation system, and " opening " or " pass " two states is arranged, and switch periods is constant to be 10ms, and dutycycle is by conducting pulse width t
pDecision, output flow is proportional to t
p
System with high-speed switch valve as guide's controlled stage, the air assisted cylinder comes solenoidoperated cluthes as power-amplifier stage joint with separate.When depressing or release the clutch pedal, the value of foot-operated sensor changes, pulse width t
pChange, the exerting oneself of power-assisted cylinder increases or reduces, and promotes throw-out-of clutch or joint.
In order to save cost, kept original gearshift mechanism in the car as much as possible, native system has had manual and automatic transmission two cover gearshift mechanisms.Under manual, system shifts gears according to driver's instruction, and under the automatic transmission state, system is judged whether to carry out gear shift operation by ECU according to current vehicle condition.Therefore, under manual and two kinds of different state of a controls of automatic transmission, the Clutch Control command source is different.
When manual, the driver is if need carry out gear shift operation, generally to step on clutch pedal earlier, this moment, clutch pedal sensor 1 was caused voltage signal also to change thereupon owing to the position changes, the voltage signal that changes enters ECU (DSP2407A) after by AD conversion chip 2, pass through suitable processing again, control chip has just obtained driver's the control command to clutch.ECU is according to present instruction, and output PWM is as PWM when being high, the speed-sensitive switch opening of valves, source of the gas 5 begins to inflate, and promotes piston 7 motions in the air assisted cylinder 6, after piston 7 overcomes the resistance of the holddown spring of clutch own, change the position of clutch, thereby realize the disengagement of clutch.On the driven disc of clutch, clutch actual displacement sensor 8 is housed, with the signal feed back of clutch actual displacement sensor 8 in ECU, according to the saturated PID control principle of anti-integration, system constantly changes the dutycycle of the PWM of output, dutycycle is in case change, the opening time of high-speed switch valve, the stressed time of air assisted cylinder also can change thereupon, and in the holdback clutch process, the resistance of the holddown spring that overcome is more and more big, thereby the variation of dutycycle will be a process that dynamically increases, when the clutch pedal instruction equates with the clutch actual displacement, dutycycle will no longer change, and clutch remains on stable instruction displacement place.
After clutch is thrown off fully, system begins to carry out gear selecting and the operation of putting into gear, put into gear after the success, driver's release the clutch pedal, clutch begins to engage, and is opposite during with holdback clutch, in the engaging clutch process, the resistance that overcomes holddown spring is more and more little, thereby the variation tendency of the output PWM of system dutycycle is a process that dynamically reduces.After clutch engages fully, the power of motor will be re-loaded on the input shaft of gearbox, and vehicle begins to quicken, and whole gearshift procedure is all over.
When automatic gear, clutch pedal will no longer work, control command is according to current vehicle condition by system, such as current vehicle speed, acceleration, series of parameters such as accelerator open degree judge whether to carry out gear shift operation, if need shift gears, then by the direct sending controling instruction of ECU, control executing mechanism realizes throwing off the whole gear shift actions of the clutch-gear selecting-clutch of putting into gear-engage automatically, realizes the full-automatic mechanical speed changing function of vehicle.
Claims (5)
1. closed loop air clutch control system based on high-speed switch valve, it comprises clutch, clutch is made up of manual device and automatic transmission device, it is characterized in that: described manual device comprises the sensing circuit that the clutch pedal place is provided with, and this circuit is connected with control circuit; The automatic transmission device includes only control circuit; Manually all be connected with Pneumatic actuator with the output terminal of automatic transmission, the output terminal of Pneumatic actuator connects with the clutch displacement detector, and the output feedback of this device is connected to control circuit.
2. the closed loop air clutch control system based on high-speed switch valve according to claim 1, it is characterized in that: sensing circuit comprises the clutch pedal sensor in the described manual device, this sensor connects with A/D convertor circuit, the output terminal connection control circuit of A/D convertor circuit.
3. the closed loop air clutch control system based on high-speed switch valve according to claim 1 is characterized in that: control circuit and the control circuit in the manual device in the described automatic transmission device are same circuit, are ECU logic control chip; Pneumatic actuator comprises the source of the gas that has high-speed switch valve, the output termination high-speed switch valve of ECU logic control chip, source of the gas also is connected with the air assisted cylinder, the piston of air assisted cylinder is connected with the clutch displacement detector, this device is displacement transducer, the output terminal feedback of displacement transducer (8) is connected to ECU logic control chip input end, forms closed loop and connects.
4. the closed loop air clutch control system based on high-speed switch valve according to claim 3, it is characterized in that: described high-speed switch valve (4) is the PWM modulation system, " opening " or " pass " two states is arranged, and switch periods is constant to be 10ms, and dutycycle is by conducting pulse width t
pDecision, output flow is proportional to t
p
5. the closed loop air clutch control system based on high-speed switch valve according to claim 3 is characterized in that: described ECU logic control chip model is DSP2407A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200260485U CN201093021Y (en) | 2007-08-24 | 2007-08-24 | Closed-loop air-actuated on-off control system based on high speed switch valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200260485U CN201093021Y (en) | 2007-08-24 | 2007-08-24 | Closed-loop air-actuated on-off control system based on high speed switch valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201093021Y true CN201093021Y (en) | 2008-07-30 |
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ID=39900987
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200260485U Expired - Lifetime CN201093021Y (en) | 2007-08-24 | 2007-08-24 | Closed-loop air-actuated on-off control system based on high speed switch valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201093021Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937153A (en) * | 2012-11-16 | 2013-02-20 | 江苏同盛环保技术有限公司 | Automatic clutch control system |
| CN104533981A (en) * | 2014-11-17 | 2015-04-22 | 潍柴动力股份有限公司 | Current control method of automatic clutch |
| CN106448373A (en) * | 2015-12-23 | 2017-02-22 | 山东建筑大学 | Control system for testing relevant parameters of AMT clutch actuator |
| CN109764072A (en) * | 2017-11-09 | 2019-05-17 | 雷沃重工股份有限公司 | Wet clutch and its control method, cropper |
| EP3055153B1 (en) * | 2013-10-09 | 2019-06-26 | Zhejiang Geely Automobile Research Institute Co., Ltd. | Power system of a series hybrid vehicle |
| CN114508553A (en) * | 2022-01-24 | 2022-05-17 | 龙岩市万通机械有限公司 | Clutch device of wheel excavator |
-
2007
- 2007-08-24 CN CNU2007200260485U patent/CN201093021Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937153A (en) * | 2012-11-16 | 2013-02-20 | 江苏同盛环保技术有限公司 | Automatic clutch control system |
| EP3055153B1 (en) * | 2013-10-09 | 2019-06-26 | Zhejiang Geely Automobile Research Institute Co., Ltd. | Power system of a series hybrid vehicle |
| CN104533981A (en) * | 2014-11-17 | 2015-04-22 | 潍柴动力股份有限公司 | Current control method of automatic clutch |
| CN106448373A (en) * | 2015-12-23 | 2017-02-22 | 山东建筑大学 | Control system for testing relevant parameters of AMT clutch actuator |
| CN109764072A (en) * | 2017-11-09 | 2019-05-17 | 雷沃重工股份有限公司 | Wet clutch and its control method, cropper |
| CN114508553A (en) * | 2022-01-24 | 2022-05-17 | 龙岩市万通机械有限公司 | Clutch device of wheel excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA NATIONAL HEAVY DUTY TRUCK GROUP JINAN POWER Free format text: FORMER OWNER: JINAN TECH CENTER CO., LTD., CHINA HEAVY TRUCK GROUP |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100908 Address after: 250061, No. ten, No. 73, Lixia District, Ji'nan City, Shandong Province Co-patentee after: China National Heavy Duty Truck Group Jinan Power Co., Ltd. Patentee after: Shandong University Address before: 250061, No. ten, No. 73, Lixia District, Ji'nan City, Shandong Province Co-patentee before: Jinan Tech Center Co., Ltd., China Heavy Truck Group Patentee before: Shandong University |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080730 |