CN102120424A - Controller and control method of eddy-current retarder of combined braking system - Google Patents
Controller and control method of eddy-current retarder of combined braking system Download PDFInfo
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Abstract
The invention provides a controller and control method of an eddy-current retarder of a combined braking system, relating to automobile eddy-current retarders. The controller comprises a minicomputer, a high-power transistor driving circuit, a braking pedal positioning sensor, a current feedback circuit and an eddy-current retarder combined switch. After a braking pedal is pedaled down, the controller switches off a gear grading control, calculates the size of an automobile real-time braking force and then calculates the gradient of the automobile according to a PWM (Pulse Width Modulation) control signal of the eddy-current retarder, the input of the braking pedal position sensor and the variation of the speed pulse of the automobile, then inquires a proportion of the automobile downslope braking force shared by the eddy-current retarder, which corresponds to the gradient and is prestored in an internal memory, applies a PWM control signal with corresponding duty ratio to an electromagnetic coil of the eddy-current retarder, outputs a certain braking torque, ensures that the eddy-current fully exerts the auxiliary braking effect on different slopes while satisfying normal operation conditions and simultaneously lightens the operation intensity of a driver.
Description
Technical field
The present invention relates to a kind of Vehicle Electronic Control series products, the control of current vortex retarder in the associated braking system that is fit to constitute by foundation brakes and current vortex retarder in the transport vehicle.
Background technology
Press laws and regulations requirement, big-and-middle-sized commerial vehicle must install complemental brake system additional, consumes the brake load of automobile at medium and small degree glancing impact, the thermal load and the contact wear that alleviate automobile main brake device.Simultaneously, continue in the braking procedure at the automobile lower long slope, complemental brake system can participate in brake action, guarantees the brake efficiency of main brake device under the emergency braking situation.Current vortex retarder is the complemental brake system of using always, but its B.P. is less relatively, and therefore, the brake action of rationally bringing into play current vortex retarder fully can guarantee that automotive safety needs to continue the highway section of braking apace, improves the transport economic specific property of automobile.
Patent 20071002225.0 has proposed " a kind of automobile foundation brakes and retarder united controller and control method ", its controller comes the degree of perception pilot control automobile foundation brakes by the change in location of brake pedal, judge whether slowing down speed of engine needs participation work, and can correspondingly regulate the lock torque of current vortex retarder.This control method is based on the brake operating of chaufeur, earlier by the lock torque of preset proportion control current vortex retarder, according to the variation of the speed of a motor vehicle lock torque of current vortex retarder carried out limited adjustment then.This control method can effectively alleviate the operation of chaufeur, and shortcoming is that the main brake device of automobile must be born a certain proportion of brake load continuous firing.
Patent 200810020499.7 has proposed " united controller of current vortex retarder and automobile foundation brakes and control method ", this controller decides current vortex retarder to be in independent master mode still to jointly control pattern with jointly controlling switch, jointly controlling in the pattern wherein, current vortex retarder and automobile foundation brakes fellowship brake action, and the lock torque of current vortex retarder becomes on the basis of fixed proportion relation at the lock torque with the automobile foundation brakes, does the adjustment of certain limit according to the moving velocity of automobile.Continue in the braking procedure, the foundation brakes participation work of automobile also is difficult to give full play to the auxiliary braking effect of current vortex retarder.
Chinese patent ZL200810022546.1 provides a kind of " split type controller of current vortex retarder ", this controller provides current vortex retarder neutral mode, gear pattern, constant speed mode and has jointly controlled pattern, according to the operating result of chaufeur to all kinds of switches, controller makes current vortex retarder enter different mode of operations.Wherein in jointly controlling pattern, current vortex retarder is exported lock torque according to the degree of driver's operation brake pedal by fixed proportion.Sort controller has changed traditional controller pattern, help the design of spatial destribution and different automobile types, but operate cumbersome, and share brake load by fixed proportion, the continuous working period of automobile foundation brakes also can be long, is difficult to reach alleviate foundation brakes contact wear and the purpose that reduces the contact component operating temperature as far as possible.
Summary of the invention
The controller and the control method that the purpose of this invention is to provide current vortex retarder in a kind of associated braking system that constitutes by current vortex retarder and automobile foundation brakes, chaufeur is according to the environment of living in of automobile, can select the manual control combined switch to make controller enter the step control pattern to current vortex retarder, or step on brake pedal, controller cuts out the step control pattern, and enters automatically and jointly control pattern.
Wherein, controller is in when jointly controlling pattern, according to the size of the braking force of current vortex retarder and automobile foundation brakes, the variation of automobile driving speed, controller is at first discerned the residing road grade of automobile, determine the required size of bearing brake load of current vortex retarder according to the gradient then, the control current vortex retarder is exported corresponding lock torque.The residing ramp of the automobile gradient is zero, and current vortex retarder is not born brake load; The residing ramp of the automobile gradient is less than setting value, and current vortex retarder is born whole brake loads; The residing ramp of the automobile gradient is more than or equal to setting value, and current vortex retarder is born the corresponding proportion part that satisfies automobile at the uniform velocity down-hill brake load on the ramp, and the brake load large percentage of bearing on the less gradient.In the Associated brake pattern, chaufeur can make the foundation brakes of automobile bring into play corresponding brake action by free as required brake activation pedal, but when the brake action of automobile foundation brakes during greater than default degree, controller judges that automobile is in emergency braking condition, forbids that current vortex retarder plays a role.
Purpose of the present invention can reach by the controller of the following stated:
Controller is made up of microcomputer, high-power crystal tube drive circuit, current feedback circuit, current vortex retarder combined switch, brake pedal position sensor.Wherein microcomputer comprises input/output end port, internal bus, microcomputer CPU, the PWM control unit, two interrupt controllers, electric erasable programmable memory device, A/D converter, read-only memory (ROM), random access memory, counting machine, timer, the high-power crystal tube drive circuit comprises optocoupler, igbt, flywheel diode, current feedback circuit comprises sample resistance, precision voltage source, op amp, the current vortex retarder combined switch can provide 1,2,3,4 retainings are the on-off signal of totally four gears, and brake pedal position sensor includes a reset switch and a linear potentiometer.
Four gear output signals of current vortex retarder combined switch and battery tension signal S1 are connected to the input/output end port of microcomputer.The reset switch of brake pedal position sensor is connected to No. 2 interrupt controllers and input/output end port, and the output of linear potentiometer is connected to the input pin of A/D converter.The PWM control unit has four tunnel outputs, every road connects the control end of optocoupler, the grid of the output termination igbt of optocoupler, the drain electrode of igbt continue the stream negative pole of diode and the positive pole of storage battery, the source electrode of igbt the continue positive pole and the current vortex retarder coil of stream diode.Totally four groups of current vortex retarder coils all connect battery negative post by sample resistance.In the current feedback circuit, sample resistance output connects the negative terminal of op amp, and precision voltage source output connects the anode of op amp, and the output of op amp connects interrupt controller No. 1.The car speed signal of taking from instrument carrier panel connects the input end of the counting machine of microcomputer.
Advantage of the present invention is that chaufeur can be according to the operation conditions and the residing road conditions of automobile of automobile, freely selecting manual mode still is that the foot-propelled mode is controlled current vortex retarder, and the conversion of dual mode is to be finished automatically by the open and-shut mode of switch by controller in the chaufeur course of normal operation.When current vortex retarder is in when jointly controlling pattern, can change the ratio of sharing that satisfies the at the uniform velocity down-hill brake load of automobile according to the size of road gradient, give full play to auxiliary braking effect, alleviate the thermal load of automobile foundation brakes as complemental brake system.Simultaneously, chaufeur is the foundation brakes of individual operation automobile according to circumstances, regulates the moving velocity of automobile.
Description of drawings
Fig. 1 is the block diagram of controller of current vortex retarder of the present invention.
Fig. 2 is the control method main flow chart of controller of current vortex retarder of the present invention.
Fig. 3 is the step control pattern subroutine flow chart of controller of current vortex retarder of the present invention.
Fig. 4 is that the external interrupt of controller of current vortex retarder of the present invention is served 1 diagram of circuit.
Fig. 5 is that the external interrupt of controller of current vortex retarder of the present invention is served 2 diagram of circuits.
Fig. 6 be controller of current vortex retarder of the present invention jointly control the pattern subroutine flow chart.
Fig. 7 is the timing break in service diagram of circuit of controller of current vortex retarder of the present invention.
Fig. 8 is the brake load ratio of current vortex retarder of the present invention and the relation of road grade.
Attached figure labeling description: 1-current vortex retarder stacked switch 2-input/output end port 3-internal bus 4-microcomputer CPU5-controller of current vortex retarder 6-microcomputer 7-PWM control module 8-optocoupler 9-igbt 10-fly-wheel diode 11-current vortex retarder coil 12-sample resistance 13-precision voltage source 14-operational amplifier 15-1 interrupt control unit 16-electric erasable programmable memory device 17-2 interrupt control unit 18-A/D converter 19-read-only storage 20-random access memory 21-counter 22-brake pedal position sensor 23-timer
The specific embodiment
Below in conjunction with Fig. 1 combined control system controller of current vortex retarder circuit structure of the present invention is described:
As shown in Figure 1, the associated braking system controller of current vortex retarder is made up of microcomputer 6, high-power crystal tube drive circuit, current feedback circuit, current vortex retarder combined switch 1, brake pedal position sensor 22.Wherein microcomputer 6 comprises input/output end port 2, internal bus 3, microcomputer CPU4, PWM control unit 7, No. 1 interrupt controller 15, No. 2 interrupt controllers 17, electric erasable programmable memory device 16, A/D converter 18, read-only memory (ROM) 19, random access memory 20, counting machine 21, timer 23, the high-power crystal tube drive circuit comprises optocoupler 8, igbt 9, flywheel diode 10, current feedback circuit comprises sample resistance 12, precision voltage source 13, op amp 14, current vortex retarder combined switch 1 can provide 1,2,3,4 retainings are the on-off signal of totally four gears, and brake pedal position sensor 22 includes a reset switch and a linear potentiometer.
Among Fig. 1, four gear output signals of current vortex retarder combined switch 1 and battery tension signal S1 are connected to the input/output end port 2 of microcomputer 6.The reset switch of brake pedal position sensor 22 is connected to No. 2 interrupt controllers 17 and input/output end port 2, and the output of linear potentiometer is connected to the input pin of A/D converter 18.PWM control unit 7 has four tunnel outputs, every road connects the control end of optocoupler 8, the grid of the output termination igbt 9 of optocoupler 8, the drain electrode of igbt 9 continue the stream negative pole of diode 10 and the positive pole of storage battery, the source electrode of igbt 9 the continue positive pole and the current vortex retarder coil 11 of stream diode 10.Totally four groups of current vortex retarder coils 11 all connect battery negative post by sample resistance 12.Sample resistance 12 outputs in the current feedback circuit connect the negative terminal of op amp 14, and precision voltage source output connects the anode of op amp 14, and the output of op amp 14 connects interrupt controller 15 No. 1.The car speed signal of taking from instrument carrier panel connects the input end of the counting machine 21 of microcomputer 6.
The input/output end port 2 of microcomputer 6 receives the digital signals such as reset switch in gear from current vortex retarder combined switch 1, storage battery low voltage signal S1, the brake pedal position sensor 22, deliver to microcomputer CPU4 through internal bus 3, obtaining the operation information of chaufeur and the voltage status of storage battery after the computing, is one of controller foundation of current vortex retarder being carried out lock torque control.
The counting machine 21 of microcomputer 6 is under the cooperation of timer 23, and the car speed pulse count in the record certain hour, and the count results in a last time period calculate pickup.
The signal of reset switch changes in No. 2 interrupt controllers 17 monitors brake pedal position transdusers 22 of microcomputer 6.When chaufeur was stepped on brake pedal, reset switch was opened, and No. 2 interrupt controller perception come the level variation from high to low of self-resetting switch, and microcomputer 6 changes current vortex retarder over to and jointly controls pattern, and forbids the step control pattern.
Current feedback circuit is imported the op amp 14 of device as a comparison with the VREF (Voltage Reference) of loss in voltage on the sample resistance 12 and precision voltage source 13, and comparative result inserts No. 1 interrupt controller 15.Be higher than the VREF (Voltage Reference) of precision voltage source 13 as the loss in voltage on the sample resistance 12, external interrupt take place in microcomputer 6, cut off the pwm pulse control signal of current vortex retarder.
Read-only memory (ROM) 19 in the microcomputer 6 is deposited program code of the present invention and automobile at the uniform velocity the brake load ratio of current vortex retarder and the relation in ramp during descending, and electric erasable programmable memory device 16 is deposited some intermediate operations results in program operation process.
Associated braking system controller of current vortex retarder of the present invention is provided with two kinds of mode of operations to current vortex retarder: the one, and the step control pattern, controller carries out the PWM control of corresponding dutycycle according to 1,2,3,4 retainings of the selected current vortex retarder combined switch 1 of chaufeur to current vortex retarder; The 2nd, jointly control pattern, controller is after chaufeur is stepped on brake pedal reset switch in the brake pedal position sensor 22 is opened, make current vortex retarder cooperate the work of automobile foundation brakes, the size of its lock torque and the automobile brake load that at the uniform velocity current vortex retarder be should bear during descending is consistent.
After dress on the automobile is with associated braking system controller of current vortex retarder of the present invention, chaufeur is under the situation of needs braking, only need to select the gear of current vortex retarder or step on brake pedal to get final product, controller is controlled the lock torque of current vortex retarder by the program of establishment in advance according to the residing working environment of automobile.
The control method of associated braking system current vortex retarder of the present invention realizes by the program of carrying out following establishment.
As shown in Figure 2, carry out following main program after the associated braking system controller of current vortex retarder powers on.
(1) associated braking system controller of current vortex retarder 5 begins to carry out main program from step 200.
(2) enter the input/output end port distribution that step 201 is carried out microcomputer then, by resource distribution it need be set and input or output state.
(3) enter step 202 and carry out timer sum counter initialization setting.
(4) enter the initialization setting that step 203 is carried out interrupt controller.
(5) enter the initialization setting that step 204 is carried out the PWM control unit.
(6) enter step 205 and remove the EEPROM space, be used for preserving results of intermediate calculations.
When (7) main program is carried out step 206, be loop head.Whether the control current of at first judging the current vortex retarder magnet coil is excessive.If electric current is excessive, jumps to step 212 and carry out the abnormal condition processing; Otherwise carry out next step operation in order.
(8) step 207 place, microcomputer extracts input port information.
(9) step 208, microcomputer is handled input port information, calculates the gear coding of chaufeur to the operation of current vortex retarder combined switch, and it is kept among the EEPROM.
(10) step 209 place judges that the gear coding that calculates has no change.If no, show that chaufeur does not have to change the operation to the current vortex retarder combined switch, step 206 loop head place is gone back in the program redirect; Otherwise carry out next step operation in order.
(11) the battery tension situation is judged at step 210 place, if battery tension is low excessively, program jumps to step 212 place and carries out the abnormal condition processing; Otherwise program enters into step 211 in order, calls the step control pattern subprogram of controller of current vortex retarder.After having called this subprogram, program jumps to step 206 loop head place and carries out on-cycle execution next time.
(12) step 212 place carries out the abnormal condition processing, is specially the pwm control signal of removing the current vortex retarder magnet coil, makes the lock torque of current vortex retarder be output as zero.Enter step 213 then, remove the gear coding of having preserved.After abnormal condition were handled, program jumped to step 206 loop head place and carries out on-cycle execution next time.
As shown in Figure 3, the associated braking system controller of current vortex retarder calls step control pattern subprogram:
(1) subprogram begins to carry out from step 300.
(2) enter step 301, controller is judged the operation of chaufeur to the current vortex retarder combined switch according to the gear coding, identification 1,2,3,4 retaining or neutrals.
(3) enter step 302, controller applies corresponding PWM control wave according to different gear operations to the current vortex retarder magnet coil, makes current vortex retarder export corresponding lock torque.
(4) enter step 303, the subroutine call of step control pattern is returned.
As shown in Figure 4, the associated braking system controller of current vortex retarder is carried out external interrupt and is served 1 program:
Controller of current vortex retarder satisfies interrupt condition as the signal from current feedback circuit when carrying out main program shown in Figure 2, controller enters external interrupt and serves 1 program.
(1) external interrupt 1 program of serving begins to carry out from step 400.
(2) enter step 401, microcomputer is closed external interrupt 1.
(3) enter step 402, microcomputer is removed the pwm control signal of current vortex retarder magnet coil, makes the lock torque of current vortex retarder be output as zero.
(4) enter step 403, microcomputer is set up the excessive zone bit of current vortex retarder solenoid current.
(5) enter step 404, microcomputer reopens external interrupt 1.
(6) enter step 405, program is returned from external interrupt service 1, continues to carry out main program.
As shown in Figure 5, the associated braking system controller of current vortex retarder is carried out external interrupt and is served 2 programs:
Controller of current vortex retarder is stepped on brake pedal as chaufeur when carrying out main program shown in Figure 2, the reset switch in the brake pedal position sensor is disconnected, and signal satisfies interrupt condition, and controller enters external interrupt and serves 2 programs.
(1) external interrupt 2 programs of serving begin to carry out from step 500.
(2) enter step 501, microcomputer is closed external interrupt 2.
(3) enter step 502, microcomputer is removed the pwm control signal of current vortex retarder magnet coil, makes the lock torque of current vortex retarder be output as zero.
(4) call and jointly control the pattern subprogram at step 503 place.
(5) carry out step 504 place and carry out the judgement whether brake pedal resets.Do not reset as brake pedal, show that the Associated brake pattern does not finish, program jumps to step 503 place and continues; Otherwise program proceeds to next step in order.
(6) enter step 505, interrupt 2 over the microcomputer.
(7) enter step 506, program is returned from external interrupt 2 programs of serving.
As shown in Figure 6, the associated braking system controller of current vortex retarder calls and jointly controls the pattern subprogram:
(1) jointly controlling the pattern subprogram begins to carry out from step 600.
(2) enter step 601, microcomputer is got the dutycycle of current current vortex retarder magnet coil pwm control signal.
(3) enter step 602, the braking force of current vortex retarder when microcomputer calculates corresponding dutycycle.
(4) enter step 603, microcomputer is stepped on the degree of brake pedal by the A/D converter chaufeur.
(5) enter step 604,, calculate the braking force of automobile foundation brakes according to the previous step result.
(6) step 605 place is judged, whether the braking force of automobile foundation brakes is greater than setting value.Carry out as jump to step 609 place greater than, program; Otherwise enter next step in order.
(7) enter step 606, microcomputer obtains the accekeration of current automobile internally in the random access memory.
(8) enter step 607, calculate the ratio of slope in automobile ramp of living in according to mechanics principle.
(9) step 608 place is judged, whether the residing gradient of automobile is zero.In this way, program execution in step 609, the pwm control signal of removing current vortex retarder magnet coil makes the lock torque of current vortex retarder be output as zero; Otherwise program execution in step 610.
(10) see step 610 earlier.Microcomputer inquiry read-only memory (ROM) is found the ratio of the corresponding automobile brake load that at the uniform velocity current vortex retarder be should bear during descending according to known ratio of slope.
(11) enter step 611, calculate and export the dutycycle of current vortex retarder magnet coil pwm control signal, make current vortex retarder export corresponding brake load ratiometric lock torque.
(12) enter step 612.After being finished, step 609 also enters this step.This step is preserved the dutycycle of current vortex retarder magnet coil pwm control signal in random access memory.
(13) enter step 613, jointly control pattern subroutine call and return.
As shown in Figure 7, the associated braking system controller of current vortex retarder is carried out regularly interrupt service routine:
(1) regularly interrupt service routine begins to carry out from step 700.
(2) enter step 701, timeing closing interrupts.
(3) enter step 702, microcomputer obtains the count results of car speed impulse singla from counting machine.
(4) enter step 703, calculate the speed of current automobile.
(5) enter step 704, get car speed on last stage.
(6) enter step 705, calculate the acceleration/accel of automobile.
(7) enter step 706, the result is kept in the random access memory with pickup.
(8) enter step 707, car speed also is kept in the random access memory.
(9) enter step 708, open regularly and interrupt.
(10) enter step 709, return from the timing services program interrupt.
Fig. 8 is an automobile when at the uniform velocity travelling, the brake load ratio that current vortex retarder is born and the corresponding relation of the automobile gradient of living in.
Fig. 8 demonstration, when the automobile gradient of living in is worth less than certain, whole ratios of the brake load when current vortex retarder is born automobile downhill, and when being worth more than or equal to this, the ratio of the brake load that current vortex retarder is born is with change in road slope, the gradient hour, large percentage.
Claims (7)
1. associated braking system controller of current vortex retarder, it is characterized in that: controller is made up of microcomputer (6), high-power crystal tube drive circuit, current feedback circuit, current vortex retarder combined switch (1), brake pedal position sensor (22).Wherein microcomputer (6) comprises input/output end port (2), internal bus (3), microcomputer CPU (4), PWM control unit (7), No. 1 interrupt controller (15), No. 2 interrupt controllers (17), electric erasable programmable memory device (16), A/D converter (18), read-only memory (ROM) (19), random access memory (20), counting machine (21), timer (23), the high-power crystal tube drive circuit comprises optocoupler (8), igbt (9), flywheel diode (10), current feedback circuit comprises sample resistance (12), precision voltage source (13), op amp (14), current vortex retarder combined switch (1) can provide 1,2,3,4 retainings are the on-off signal of totally four gears, and brake pedal position sensor (22) includes a reset switch and a linear potentiometer.
Four gear output signals of current vortex retarder combined switch (1) and battery tension signal S1 are connected to the input/output end port (2) of microcomputer (6); The reset switch of brake pedal position sensor (22) is connected to No. 2 interrupt controllers (17) and input/output end port (2), and the output of linear potentiometer is connected to the input pin of A/D converter (18).PWM control unit (7) has four tunnel outputs, every road connects the control end of optocoupler (8), the grid of the output termination igbt (9) of optocoupler (8), the drain electrode of igbt (9) continue stream diode (10) negative pole and the positive pole of storage battery, the source electrode of igbt (9) continue stream diode (10) positive pole and current vortex retarder coil (11); Totally four groups of current vortex retarder coils (11) all pass through sample resistance (12) and connect battery negative post.In the current feedback circuit, sample resistance (12) output connects the negative terminal of op amp (14), and precision voltage source output connects the anode of op amp (14), and the output of op amp (14) connects No. 1 interrupt controller (15); The car speed signal of taking from instrument carrier panel connects the input end of the counting machine (21) of microcomputer (6).
2. the control method of an associated braking system current vortex retarder, it is characterized in that: controller of current vortex retarder (5) can make current vortex retarder work in the step control pattern and jointly control pattern, and when jointly controlling the pattern execution, the step control pattern is under an embargo; Controller of current vortex retarder (5) enters and jointly controls pattern after chaufeur is stepped on reset switch that brake pedal makes brake pedal position sensor (22) and opened, and closes the step control pattern; After current vortex retarder entered and jointly controls pattern, controller of current vortex retarder (5) distributed current vortex retarder how much to bear the brake load ratiometric according to gradient size.
3. the control method of associated braking system current vortex retarder according to claim 2, it is characterized in that: the step control pattern is that controller of current vortex retarder (5) is exported the corresponding control wave of determining dutycycle to the gear operation of current vortex retarder combined switch (1) to igbt (9) according to chaufeur, makes the certain lock torque of current vortex retarder output.
4. the control method of associated braking system current vortex retarder according to claim 2, it is characterized in that: jointly control pattern and be controller of current vortex retarder (5) after chaufeur is stepped on reset switch that brake pedal makes brake pedal position sensor (22) and opened, microcomputer (6) obtains the dutycycle of current vortex retarder control signal by the PWM control unit, A/D converter (18) extracts the input of brake pedal position sensor (22), counting machine (21) and timer (23) calculate the variation of car speed pulse, calculate the size of automobile actual braking force earlier, calculate the residing gradient of automobile then, inquire again to be pre-stored in and be worth corresponding current vortex retarder with the ramp in the inner read-only memory (ROM) (19) and share the at the uniform velocity ratio of downhill braking power of automobile, current vortex retarder coil (11) is applied the pwm control signal of corresponding dutycycle, export certain lock torque, on different ramps, bring into play its auxiliary braking effect when making current vortex retarder satisfy normal operating conditions fully.
5. the control method of associated braking system current vortex retarder according to claim 4, it is characterized in that: after controller of current vortex retarder (5) enters and jointly controls pattern, if automobile ramp of living in value is zero, controller of current vortex retarder (5) control current vortex retarder does not provide braking force.
6. the control method of associated braking system current vortex retarder according to claim 4, it is characterized in that: after controller of current vortex retarder (5) enters and jointly controls pattern, if automobile ramp of living in provides automobile required braking force less than the value of setting by current vortex retarder.
7. the control method of associated braking system current vortex retarder according to claim 4, it is characterized in that: after controller of current vortex retarder (5) enters and jointly controls pattern, when the input value of brake pedal position sensor (22) surpasses certain numerical value, make current vortex retarder that braking force is not provided.
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| CN201010590330.2A CN102120424B (en) | 2010-12-09 | 2010-12-09 | Controller and control method of eddy-current retarder of combined braking system |
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| CN103089857A (en) * | 2012-12-17 | 2013-05-08 | 江苏大学 | Brake integrating rotary barrel type eddy current retarder and drum brake |
| CN103326536A (en) * | 2013-07-03 | 2013-09-25 | 江苏大学 | Coil and permanent magnet hybrid excitation type eddy current retarder |
| CN104802649A (en) * | 2015-03-17 | 2015-07-29 | 合肥协力仪表控制技术股份有限公司 | Eddy current retarder controller and control method |
| CN110539644A (en) * | 2019-09-18 | 2019-12-06 | 南京丁博控制器有限公司 | Eddy current retarding system for automobile |
| CN113389859A (en) * | 2021-05-31 | 2021-09-14 | 浙江师范大学 | Wind generating set prediction type constant speed box system and constant speed control method |
| CN114179623A (en) * | 2020-09-15 | 2022-03-15 | 郑州宇通客车股份有限公司 | Vehicle electric braking method and system |
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| CN101337511A (en) * | 2008-08-15 | 2009-01-07 | 赵迎生 | Split type electric eddy speed damper controller |
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| CN101030754A (en) * | 2007-02-12 | 2007-09-05 | 盐城市步高汽配制造有限公司 | Stepless torque braking controller of electric vortex speed releaser |
| CN101239589A (en) * | 2008-03-10 | 2008-08-13 | 江苏大学 | Electric eddy speed damper and vehicle friction brake combined controller and control method |
| CN101337511A (en) * | 2008-08-15 | 2009-01-07 | 赵迎生 | Split type electric eddy speed damper controller |
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| CN103089857A (en) * | 2012-12-17 | 2013-05-08 | 江苏大学 | Brake integrating rotary barrel type eddy current retarder and drum brake |
| CN103326536A (en) * | 2013-07-03 | 2013-09-25 | 江苏大学 | Coil and permanent magnet hybrid excitation type eddy current retarder |
| CN104802649A (en) * | 2015-03-17 | 2015-07-29 | 合肥协力仪表控制技术股份有限公司 | Eddy current retarder controller and control method |
| CN104802649B (en) * | 2015-03-17 | 2018-08-17 | 合肥协力仪表控制技术股份有限公司 | A kind of controller of current vortex retarder |
| CN110539644A (en) * | 2019-09-18 | 2019-12-06 | 南京丁博控制器有限公司 | Eddy current retarding system for automobile |
| CN110539644B (en) * | 2019-09-18 | 2023-01-06 | 南京丁博控制器有限公司 | Eddy current retarding system for automobile |
| CN114179623A (en) * | 2020-09-15 | 2022-03-15 | 郑州宇通客车股份有限公司 | Vehicle electric braking method and system |
| CN114179623B (en) * | 2020-09-15 | 2023-07-07 | 宇通客车股份有限公司 | Electric braking method and system for vehicle |
| CN113389859A (en) * | 2021-05-31 | 2021-09-14 | 浙江师范大学 | Wind generating set prediction type constant speed box system and constant speed control method |
| CN113389859B (en) * | 2021-05-31 | 2023-04-25 | 浙江师范大学 | Wind generating set prediction type constant speed box system and constant speed control method |
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