CN101596870A - Self-excitation retarder drive controller and control method thereof - Google Patents
Self-excitation retarder drive controller and control method thereof Download PDFInfo
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- CN101596870A CN101596870A CNA2009100325638A CN200910032563A CN101596870A CN 101596870 A CN101596870 A CN 101596870A CN A2009100325638 A CNA2009100325638 A CN A2009100325638A CN 200910032563 A CN200910032563 A CN 200910032563A CN 101596870 A CN101596870 A CN 101596870A
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Abstract
The invention discloses a kind of self-excitation retarder drive controller and control method thereof of highway transport vehicle brake system, several on-off signal testing circuits, brake lamp driving circuit, silicon control conducting angle trigger circuit, exciting coil drive circuit, gear display circuit, analog signal detection circuit are connected microprocessor respectively with voltage detecting circuit; Microprocessor is gathered on-off signal and is judged that retarder lock torque gear, collection ABS signal judge the current wheel lockup that whether occurs, gather retarder body temperature signal, when surpassing the temperature upper limit of setting, the retarder body temperature then exports control signal to coil driver, the size of the present invention by control silicon control conducting angle realized the control to the lock torque size, arcing phenomenon when having avoided the frequent adhesive of relay contact has prolonged service life of driving governor.The glancing impact all coils participates in work synchronously, the uneven problems such as deformation that produced that solved that coil is aging inhomogeneous, rotor is heated.
Description
Technical field:
The present invention relates to the auxiliary braking safety device of highway transport vehicle brake system, relate in particular to the driving governor of the self-excitation retarder of big-and-middle-sized tourist coach, public transport passenger vehicle and goods carrying vehicle.
Background technology
Self-excitation retarder structurally is divided into power generation assembly and retarding device two parts, and power generation assembly is the rare earth permanent-magnetic generator of a radial structure, and it is converted to AC energy to running car kinetic energy and provides exciting current for retarding device when car brakeing.The physical construction of retarding device comprises: rotor and stator.The rotating cylinder that rotor normally selects for use magnetic property height such as electrical pure iron, dead-soft steel or alloy steel and the low metallic material of remanent magnetism rate to make.Rotor is connected with transmission shaft by butt flange, and rotates synchronously with transmission shaft.The iron core that has 12 high permeability materials to make on the stator is circle distribution and is installed in equably on the high-intensity fixed mount; Excitation coil is placed in the common magnetic poles of unshakable in one's determination, and two relative on circumference excitation coil serial or parallel connections become one group of magnetic pole, and adjacent two magnetic poles are N, S is alternate, form separate Np to magnetic pole.
The common electrical eddy current retarder provides the DC excitation electric current by Vehicular accumulator cell for its excitation coil, provide alternating current and the self-excitation retarder power generation assembly is slow excitation coil, this has just determined that the drive controlling of self-excitation retarder is different with the common electrical eddy current retarder.The external at present self-excitation retarder drive controller of producing adopts relay as control element, and its defective is:
1, because the frequent adhesive arcing of relay makes contact endurance low, cause this driving governor to damage easily.
2, the lock torque gear only has " height ", " low " and " stopping " three gears, and another part is not worked by relay control part coil working when selecting low grade for use, and all coils participates in work when selecting top grade for use.This driving governor has caused lock torque to present bigger step variation, can't regulate lock torque continuously equably, has influenced vehicle braked stationarity and travelling comfort; Cause phenomenons such as coil is aging inhomogeneous, rotor easy deformation simultaneously, shortened the service life of self-excitation retarder to a certain extent.
Summary of the invention:
The objective of the invention is to the defective that exists at external self-excitation retarder drive controller and a kind of control effective non-contact type self-excitation retarder drive controller and control method thereof are provided.
The technical scheme that self-excitation retarder drive controller adopts is: several on-off signal testing circuits, brake lamp driving circuit, silicon control conducting angle trigger circuit, exciting coil drive circuit, gear display circuit connect microprocessor by the I/O mouth respectively; Analog signal detection circuit, voltage detecting circuit are connected to 12 A/D translation interfaces of microprocessor; Described several on-off signals comprise manual driving switch signal, ABS on-off signal, speed of a motor vehicle on-off signal; Described analog signal comprises brake pedal analog signal that is directly proportional with brake-pipe pressure and the rotor disk temperature analog signal that is directly proportional with the self-excitation retarder body temperature.
The technical scheme that the control method of self-excitation retarder drive controller adopts is: microprocessor is gathered the pressure signal of vehicle speed signal, brake pedal, manual shift signal in real time, judge retarder lock torque gear according to vehicle speed signal, brake-pedal load signal and manual gear signal, if retarder is in running order, corresponding gear zone bit then is set, and exports corresponding indicator signal to the brake lamp driving circuit; If retarder is not worked, then the triac U5 of coil driver is ended, and remove all gear signs to the PORT3 of coil driver pin output control signal; Microprocessor is gathered the ABS signal and judges currently wheel lockup whether occurs, if wheel lockup do not occur, then makes the triac U5 conducting of coil driver to the PORT3 of coil driver pin output control signal; If locking appears in wheel, then the triac U5 of coil driver is ended to the PORT3 of coil driver pin output control signal; Microprocessor is gathered self-excitation retarder body temperature signal, when the self-excitation retarder body temperature surpasses the temperature upper limit of setting, then to the PORT3 of coil driver pin output control signal, the triac U5 of coil driver is ended.
The invention has the beneficial effects as follows: the size by control silicon control conducting angle has realized the control to self-excitation retarder lock torque size, and the arcing phenomenon when having avoided the frequent adhesive of relay contact has prolonged service life of driving governor.The glancing impact all coils participates in work synchronously, the uneven problems such as deformation that produced that solved that coil is aging inhomogeneous, rotor is heated.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is that the circuit structure of self-excitation retarder drive controller of the present invention connects block diagram.
Fig. 2 is the connection diagram of on-off signal testing circuit 2 among Fig. 1.
Fig. 3 is the connection diagram of brake lamp driving circuit 3 among Fig. 1.
Fig. 4 is the connection diagram of voltage detecting circuit 4 among Fig. 1.
Fig. 5 is the connection diagram of silicon control conducting angle trigger circuit 5 among Fig. 1.
Fig. 6 is the connection diagram of exciting coil drive circuit 6 among Fig. 1.
Fig. 7, Fig. 8 are the control method flow charts of self-excitation retarder drive controller of the present invention.
The specific embodiment
As shown in Figure 1, the present invention selects for use mixed-signal system level micro controller system C8051F020 as microprocessor 1, and power module 9 provides direct supply voltage for described driving governor.Speed of a motor vehicle on-off signal, some manual gear signal, the ABS on-off signal of some on-off signal testing circuit 2 outputs are connected to microprocessor 1 by the I/O mouth.Analog signal detection circuit 7 and voltage detecting circuit 4 are connected to 12 A/D converter input ends of microprocessor 1, the analog signal that analog signal detection circuit 7 detects comprises the brake pedal analog signal that is directly proportional with brake-pipe pressure, the rotor disk temperature analog signal that is directly proportional with the self-excitation retarder body temperature, is input to 12 A/D converter input ends of microprocessor 1 after the filtering of analog signal process filtering modulate circuit and the conditioning.Silicon control conducting angle trigger circuit 5 are connected to the outer interruption of microprocessor 1, produce silicon control conducting angle impulse singla in interrupt handling routine.Exciting coil drive circuit 6, system car light driving circuit 3, gear display circuit 8 are connected to microprocessor 1 by the I/O mouth respectively, microprocessor 1 is input to the control that exciting coil drive circuit 6 is realized the excitation coil electric current with silicon control conducting angle impulse singla, thereby reaches the control to the self-excitation retarder lock torque.
As shown in Figure 2, on-off signal testing circuit 2 is connected by resistance R 23, Schmidt trigger U9A, resistance R 25, photoelectrical coupler U10 successively for handling the shaping circuit of on-off signal, and resistance R 24, R26, capacitor C 40 are attempted by in the circuit.The on-off signal that on-off signal testing circuit 2 is detected comprises 1 retaining, 2 retainings, 3 retainings, 4 retainings, the on-off signal of 5 manual gears of constant speed, ABS on-off signal, speed of a motor vehicle on-off signal.Described some gear signal, ABS signal are connected to the I/O interface of microprocessor 1; Vehicle speed signal is input to microprocessor 1, edge trigging pulse as the programmable counter array (being PCA0) of microprocessor 1 seizure/comparison module, the count value of the programmable counter array between twice seizure is saved and constantly is refreshed, the count value of programmable counter array not only is used to measure the speed of a motor vehicle, simultaneously also as the intermediate variable that calculates the silicon control conducting angle.
As shown in Figure 3, brake lamp driving circuit 3 is connected successively by resistance R 45, R46, photoelectrical coupler U20, device for power switching U21, diode D15, diode D14 is parallel to the mouth of photoelectrical coupler U20, and resistance R 47 is connected with diode D16 and is parallel to then between device for power switching U21 and the ground.When retarder was worked, microprocessor 1 was to described brake lamp driving circuit 3 output braking mode indicator signals.
As shown in Figure 4, voltage detecting circuit 4 is used to detect the output voltage of self-excitation retarder power generation assembly, and provide power line voltage for described silicon control conducting angle trigger circuit 5, described voltage detecting circuit 4 is by rectifier bridge U9, π LC filter circuit and two bleeder circuits constitute, inductance L, capacitor C 33, C34 constitutes π LC type filter circuit and connects with rectifier bridge U9, resistance R 18, R19 constitutes bleeder circuit and connects with π LC type filter circuit, capacitor C 35, C36 is attempted by in the circuit, the bleeder circuit output voltage provides power line voltage for conducting angle trigger circuit 5, resistance R 20, R21 constitutes another road bleeder circuit and connects with described π LC type filter circuit, and output voltage is connected to microprocessor 1 as 12 ADC incoming signals.
As shown in Figure 5, described silicon control conducting angle trigger circuit 5 are connected successively by resistance R 14, zero-crossing comparator U7, resistance R 15, R16 photoelectrical coupler U8, resistance R 17, and zener diode DZ1, DZ2 are connected in parallel on zero-crossing comparator U7 and resistance R 15 two ends.Silicon control conducting angle trigger circuit 5 receive the sinusoidal voltage of self-excitation retarder power generation assembly output, produce silicon control conducting angle energizing signal, silicon control conducting angle energizing signal connects the outer interruption of microprocessor 1, and microprocessor 1 enters interrupt handling routine after receiving outer interrupt signal; Interrupt handling routine is at first to the PORT4 of coil driver 6 pin, PORT5 pin output control signal, removes the original mode of operation of coil driver 6; Read the programmable counter array count value of gear zone bit and aforementioned preservation then, determine the timer counting step according to the count value of current lock torque gear and programmable counter array; Timer carries out timing according to determined counting step, regularly finishes to coil driver 6 output silicon control conducting angle impulse singlas.
As shown in Figure 6, exciting coil drive circuit 6 is connected between excitation coil and the self-excitation retarder power generation assembly voltage output end, constitute the single-phase bridge SCR rectification circuit by controllable silicon SCR 1, SCR2, sustained diode 1, D2, resistance R 1, capacitor C 1 are connected to controllable silicon SCR 1 negative electrode and control end constitutes controllable silicon SCR 1 protective circuit, resistance R 7, photoelectrical coupler U3, resistance R 5, diode D2 constitute controllable silicon SCR 1 driving circuit, the protective circuit of resistance R 2, capacitor C 2 formation in parallel with photoelectrical coupler U3 photoelectrical coupler U3; Resistance R 3, capacitor C 3 are connected to controllable silicon SCR 2 negative electrodes and control end constitutes controllable silicon SCR 2 protective circuits, resistance R 10, photoelectrical coupler U4, resistance R 6, diode D4 constitute controllable silicon SCR 2 driving circuits, resistance R 4, capacitor C 4 and photoelectrical coupler U4 formation in parallel photoelectrical coupler U4 protective circuit; Resistance R 8, photoelectrical coupler U6 are connected to excitation coil both sides and resistance R 9 common formation field coil short circuit condition testing circuits; Resistance R 12, U5 constitute the transwitch circuit, are used to control being connected of self-excitation retarder power generation assembly output voltage and excitation coil.
The control method of self-excitation retarder drive controller of the present invention is: microprocessor 1 is gathered vehicle speed signal, the pressure signal of brake pedal, manual shift signal in real time, judge retarder lock torque gear according to vehicle speed signal, brake-pedal load signal and manual gear signal, corresponding gear zone bit is set if retarder is in running order, if retarder is not worked, then the triac U5 of coil driver 6 is ended, and remove all gear zone bits to the PORT3 of coil driver 6 pin output control signal; Microprocessor 1 is gathered the ABS signal and is judged the current wheel lockup that whether occurs, if wheel lockup do not occur, then make the triac U5 conducting of coil driver 6 to the PORT3 of coil driver 6 pin output control signal, if locking appears in wheel, then the triac U5 of coil driver 6 is ended to the PORT3 of coil driver 6 pin output control signal; Microprocessor is gathered self-excitation retarder body temperature signal, when the self-excitation retarder body temperature surpasses the temperature upper limit of setting, then to the PORT3 of coil driver 6 pin output control signal, the triac U5 of coil driver 6 is ended.
The vehicle speed signal of on-off signal testing circuit 2 outputs is as the programmable counter array edge energizing signal of microprocessor 1 seizure/comparison module, the count value of the programmable counter array between twice seizure is saved and constantly is refreshed, the count value of programmable counter array not only is used to measure the speed of a motor vehicle, simultaneously also as the intermediate variable that calculates the silicon control conducting angle.Silicon control conducting angle trigger circuit 5 receive the sinusoidal voltage of self-excitation retarder power generation assembly output, produce silicon control conducting angle energizing signal, silicon control conducting angle energizing signal connects the outer interruption of microprocessor 1, and microprocessor 1 enters interrupt handling routine after receiving outer interrupt signal.Interrupt handling routine is at first to the PORT4 of coil driver 6 pin, PORT5 pin output control signal, remove the original mode of operation of coil driver 6, read the programmable counter array count value of gear zone bit and preservation then, determine the timer counting step according to current self-excitation retarder lock torque gear and programmable counter array and numerical value, enter down the step then; Timer carries out timing according to above-mentioned definite counting step, regularly finishes to coil driver 6 output silicon control conducting angle impulse singlas.
As shown in Figure 7, above-mentioned control method concrete operations step is as follows:
(1) enters step 101 after the program initialization.
(2) whether the step 101 detection speed of a motor vehicle is lower than setting value 5km/h.If the speed of a motor vehicle is lower than 5km/h, then enter step 108; If the speed of a motor vehicle is higher than 5km/h, then enter step 102.
(3) make PORT3=0 in the coil driver 6 in the step 108, block coil driver 6, and remove all gear signs, return then.
(4) step 102 judges according to brake-pedal load whether foundation brakes works, if foundation brakes work then enter step 109; If foundation brakes is not worked, then enter step 103.
(5) step 103 has judged whether manual gear signal, if manual gear signal is arranged, then enters step 104 and carries out the setting of gear zone bit, enters step 106 then; Otherwise enter step 108.
(6) make PORT3=1 in the coil driver 6 in the step 106, make coil driver enter mode of operation.Enter step 107 then.
(7) temperature of step 107 pair self-excitation retarder body is judged, if temperature surpasses setting value, then enters step 113; If do not surpass setting value, then return.
(8) step 113 makes the PORT3=0 of coil driver, blocks coil driver; Enter step 114 then and delay time, the self-excitation retarder body temperature is reduced.
(9) step 109 is judged self-excitation retarder lock torque gear by foundation brakes pedal pressing force signal, enters step 110 then the gear sign is set, and enters step 111 after setting up zone bit.
(10) step 111 has judged whether the ABS signal, if the ABS signal is arranged, then enters step 112, makes the PORT3=0 in the coil driver 6 in step 112, blocks coil driver, returns step 111 then; If there is not the ABS signal, then enter step 106.
As shown in Figure 8, after microprocessor 1 receives silicon control conducting angle trigger circuit 5 output interrupt signals, enter interrupt handling routine and execution according to the following steps in regular turn:
(1) enters step 121 after entering interrupt handling routine, in step 121, make PORT4=0, the PORT5=0 of coil driver 6, enter step 122 then.
(2) in step 122, read the gear zone bit, enter the count value that step 124 reads the programmable counter array of being preserved (PCA0) then, enter step 125 then.
(3) determine the timer count value according to lock torque gear, programmable counter array count value in step 125, timer timing length has determined the size of silicon control conducting angle.When finishing, timer, returns then to the PORT4 and the PORT5 output silicon control conducting angle impulse singla of coil driver 6.
Claims (8)
1, a kind of self-excitation retarder drive controller is characterized in that: several on-off signal testing circuits (2), brake lamp driving circuit (3), silicon control conducting angle trigger circuit (5), exciting coil drive circuit (6), gear display circuit (8) connect microprocessor (1) by I/O respectively; Analog signal detection circuit (7), voltage detecting circuit (4) are connected to (1) 12 A/D translation interface of microprocessor; Described several on-off signals comprise manual driving switch signal, ABS on-off signal, speed of a motor vehicle on-off signal; Described analog signal comprises brake pedal analog signal that is directly proportional with brake-pipe pressure and the rotor disk temperature analog signal that is directly proportional with the self-excitation retarder body temperature.
2, self-excitation retarder drive controller according to claim 1, it is characterized in that: described on-off signal testing circuit (2) is connected successively by resistance (R23), schmidt trigger (U9A), resistance (R25), photoelectrical coupler (U10), and resistance (R24, R26), electric capacity (C40) are attempted by in the circuit respectively.
3, self-excitation retarder drive controller according to claim 1, it is characterized in that: described brake lamp driving circuit (3) is connected successively by resistance (R45, R46), photoelectrical coupler (U20), device for power switching (U21), diode (D15), diode (D14) is parallel to the mouth of photoelectrical coupler (U20), resistance (R47) be parallel between device for power switching (U21) and the ground after diode (D16) is connected.
4, self-excitation retarder drive controller according to claim 1, it is characterized in that: described voltage detecting circuit (4) is made of rectifier bridge (U9), π LC filter circuit and two bleeder circuits, inductance (L), electric capacity (C33, C34) constitute π LC type filter circuit and connect with rectifier bridge (U9), the road bleeder circuit that resistance (R18, R19) constitutes is connected with π LC type filter circuit, electric capacity (C35, C36) is attempted by in this No. one bleeder circuit, and it is output as conducting angle trigger circuit (5) power line voltage is provided; Another road bleeder circuit that resistance (R20, R21) constitutes is connected with described π LC type filter circuit, and electric capacity (C37, C38) is attempted by in another road bleeder circuit, its output connecting microprocessor (1).
5, self-excitation retarder drive controller according to claim 1, it is characterized in that: described silicon control conducting angle trigger circuit (5) are connected successively by resistance (R14), zero-crossing comparator (U7), resistance (R15, R16), photoelectrical coupler (U8) and resistance (R17), and zener diode (DZ1, DZ2) is connected in parallel on zero-crossing comparator (U7) and resistance (R15) two ends.
6, self-excitation retarder drive controller according to claim 1, it is characterized in that: described exciting coil drive circuit (6) is by silicon control (SCR1, SCR2), flywheel diode (D1, D2) constitute the single-phase bridge SCR rectification circuit, resistance (R1), electric capacity (C1) is connected to silicon control (SCR1) negative electrode and control end constitutes silicon control (SCR1) protective circuit, resistance (R7), photoelectrical coupler (U3), resistance (R5), diode (D2) constitutes silicon control (SCR1) driving circuit, resistance (R2), the protective circuit of electric capacity (C2) photoelectrical coupler of formation in parallel with photoelectrical coupler (U3) (U3); Resistance (R3), electric capacity (C3) are connected to silicon control (SCR2) negative electrode and control end constitutes silicon control (SCR2) protective circuit, resistance (R10), photoelectrical coupler (U4), resistance (R6), diode (D4) constitute silicon control (SCR2) driving circuit, resistance (R4), electric capacity (C4) and photoelectrical coupler (U4) formation in parallel photoelectrical coupler (U4) protective circuit; Resistance (R8), photoelectrical coupler (U6) are connected to excitation coil (L) both sides and resistance (R9) constitutes excitation coil (L) short-circuit detecting circuit jointly; Resistance (R12), photoelectrical coupler (U5) constitute the transwitch circuit.
7, a kind of control method of self-excitation retarder drive controller is characterized in that adopting following steps:
1) microprocessor (1) is gathered the pressure signal of vehicle speed signal, brake pedal, manual shift signal in real time, judge retarder lock torque gear according to vehicle speed signal, brake-pedal load signal and manual gear signal, if retarder is in running order, corresponding gear zone bit then is set, and exports corresponding indicator signal to brake lamp driving circuit (3); If retarder is not worked, then the PORT3 pin output control signal to coil driver (6) ends the triac (U5) of coil driver (6), and removes all gear signs;
2) microprocessor (1) is gathered the ABS signal and judges currently wheel lockup whether occurs, if wheel lockup do not occur, then makes triac (U5) conducting of coil driver (6) to the PORT3 pin output control signal of coil driver (6); If locking appears in wheel, then the PORT3 pin output control signal to coil driver (6) ends the triac (U5) of coil driver (6);
3) microprocessor (1) is gathered retarder body temperature signal, when the retarder body temperature surpasses the temperature upper limit of setting, then to the PORT3 pin output control signal of coil driver (6), the triac (U5) of coil driver (6) is ended.
8, the control method of self-excitation retarder lock torque according to claim 7 is characterized in that comprising following steps:
1) vehicle speed signal of on-off signal testing circuit (2) output is as the programmable counter array edge energizing signal of microprocessor (1) seizure/comparison module, the count value of the programmable counter array between twice seizure is saved and constantly is refreshed, the count value of programmable counter array not only is used to measure the speed of a motor vehicle, simultaneously also as the intermediate variable that calculates the silicon control conducting angle;
2) silicon control conducting angle trigger circuit (5) receive the sinusoidal voltage of self-excitation retarder power generation assembly output, produce silicon control conducting angle energizing signal, silicon control conducting angle energizing signal connects the outer interruption of microprocessor (1), enters interrupt handling routine after microprocessor (1) receives outer interrupt signal;
3) interrupt handling routine is at first exported control signal to PORT4 pin, the PORT5 pin of coil driver (6), remove the original mode of operation of coil driver (6), read the programmable counter array count value that gear zone bit and step 1) are preserved then, determine the timer counting step according to current retarder lock torque gear and programmable counter array and numerical value, enter step 4) then;
4) timer carries out timing according to the definite counting step of step 3), regularly finishes to coil driver (6) output silicon control conducting angle impulse singla.
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| CN2009100325638A CN101596870B (en) | 2009-06-23 | 2009-06-23 | Self-excitation retarder drive controller |
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Cited By (7)
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| CN102673410A (en) * | 2012-06-05 | 2012-09-19 | 江苏大学 | Intelligent control driver for self-excited retarder and control method |
| CN103676676A (en) * | 2012-09-05 | 2014-03-26 | 洛阳市黄河软轴控制器股份有限公司 | Intelligent switching circuit for eddy current retarder |
| CN104079831A (en) * | 2014-06-30 | 2014-10-01 | 苏州吉视电子科技有限公司 | Camera with multiple paths of flash synchronizing signals |
| CN105752057A (en) * | 2015-12-31 | 2016-07-13 | 芜湖联合新能源重卡产业技术研究院有限公司 | Control method for auxiliary braking of heavy truck |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2776786B1 (en) * | 1998-03-24 | 2004-07-16 | Renault | METHOD FOR MONITORING THE DYNAMIC BEHAVIOR OF A ROAD VEHICLE |
| US6819995B2 (en) * | 1998-11-13 | 2004-11-16 | Cummins, Inc. | System and method for controlling vehicle braking operation |
| JP2008265397A (en) * | 2007-04-17 | 2008-11-06 | Nissan Motor Co Ltd | Vehicular braking control device |
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| CN102673410A (en) * | 2012-06-05 | 2012-09-19 | 江苏大学 | Intelligent control driver for self-excited retarder and control method |
| CN102673410B (en) * | 2012-06-05 | 2014-05-28 | 江苏大学 | Intelligent control driver for self-excited retarder and control method |
| CN103676676A (en) * | 2012-09-05 | 2014-03-26 | 洛阳市黄河软轴控制器股份有限公司 | Intelligent switching circuit for eddy current retarder |
| CN104079831A (en) * | 2014-06-30 | 2014-10-01 | 苏州吉视电子科技有限公司 | Camera with multiple paths of flash synchronizing signals |
| CN104079831B (en) * | 2014-06-30 | 2017-09-12 | 苏州吉视电子科技有限公司 | A kind of camera with multichannel flash synchronization signal |
| CN105752057A (en) * | 2015-12-31 | 2016-07-13 | 芜湖联合新能源重卡产业技术研究院有限公司 | Control method for auxiliary braking of heavy truck |
| CN109588130A (en) * | 2018-11-30 | 2019-04-09 | 徐州中森智能装备有限公司 | A kind of anti-system of dying of a sudden illness suitable for graden machine |
| CN109795328A (en) * | 2019-03-04 | 2019-05-24 | 重庆先锋渝州电器有限公司 | The electric hybrid vehicle of oil and its energy back-feed control method with energy feedback function |
| CN113865785A (en) * | 2021-09-18 | 2021-12-31 | 贵州航天计量测试技术研究所 | Brake torque loading device for dynamic torque sensor calibration and use method thereof |
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