CN103057425A - Electronic control unit for vehicular self-excitation liquid-cooled retarders - Google Patents
Electronic control unit for vehicular self-excitation liquid-cooled retarders Download PDFInfo
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- CN103057425A CN103057425A CN2013100038292A CN201310003829A CN103057425A CN 103057425 A CN103057425 A CN 103057425A CN 2013100038292 A CN2013100038292 A CN 2013100038292A CN 201310003829 A CN201310003829 A CN 201310003829A CN 103057425 A CN103057425 A CN 103057425A
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Abstract
The invention relates to an electronic control unit for vehicular self-excitation liquid-cooled retarders. The device is used for managing current input in an excitation coil of a self-excitation liquid-cooled retarder. Gear shift is input through a handle so as to change duty ratio of PWM (pulse width modulation) pulse, and the magnitude of the excitation current is controlled. Brake torque of the retarder changes with change of the excitation current. A control circuit of the electronic control unit structurally comprises a microprocessor clock circuit, a reset circuit, a 24V-5V power supply circuit, a speed sensor analog input circuit 1, a temperature sensor analog input circuit 2, an ABS (anti-lock brake system) input circuit, a cruise input circuit, an input gear switching circuit, a misoperation switching-off circuit, a gear indicator lamp circuit, a serial port communication circuit, a CAN (controlled area network) communication circuit, a brake lamp control circuit and an excitation current high-power output circuit. The electronic control unit is available in controlling the magnitude of the excitation current in the retarder coil for controlling brake torque of the self-excitation liquid-cooled retarder, and generates power so that a battery of a car body is saved.
Description
Technical field
The present invention is a kind of electronic control package that can control self-excitation type liquid-cooled retarder lock torque, this device manages the electric current of input self-excitation type liquid-cooled retarder excitation coil, when exciting current changes size, the lock torque of retarder changes and changes along with exciting current, thereby reaches the purpose of control self-excitation type liquid-cooled retarder.This device is divided into four gears to input self-excitation retarder exciting current size, adopt the mode of the output of high-power electric current, provide stable and continual exciting current to the self-excitation type liquid-cooled retarder, retarder sends different electric weight according to the size of exciting current, thereby saved the battery power consumption of automobile itself, improved the result of use of retarder.
Background technology
The self-excitation type liquid-cooled retarder is a kind of novel auxiliary brake device for automobile, and its lock torque control method is different from the common electrical eddy current retarder take the storage battery constant DC voltage as power supply.Self-excitation type liquid-cooled retarder self need to provide certain exciting current to generate electricity with power generation assembly, when work ECU (Electrical Control Unit) is had specific (special) requirements.In order to keep the downhill braking state of constant speed, self-excitation type liquid-cooled retarder braking force must change along with the variation of the speed of a motor vehicle, the moving velocity of therefore necessary Real-time Collection automobile.The self-excitation type liquid-cooled retarder adopts the liquid cooling mode to dispel the heat after work is long-time, so retarder control system need to gather the temperature of retarder and liquid.Traditional mode is difficult to produce a desired effect, structure and above-mentioned functions for the self-excitation type liquid-cooled retarder, retarder ECU (Electrical Control Unit) system adopts the pwm pulse control method, export exciting current with high-power switch tube, also need simultaneously CAN communication to reach the effect of real-time Communication for Power between retarder and the automobile.
Traditional retarder control method has relay control mode, and Control refers to and adopts relay as a kind of mode of power element.Control the connection logarithm of current vortex retarder excitation coil by the adhesive of relay contact, thereby the size of current of control stator exciting coil reaches slow effect.This mode is comparatively directly perceived, cost is lower, but relay is to connect circuit by the contact of contact, like this in the working process of self-excitation type liquid-cooled retarder, relay is adhesive and disconnection frequently, contact endurance can be very low, and the variation classification of lock torque is discontinuous, braking force changes suddenly, automobile is had certain impact, and the large electric current arcing of mechanical contact frequent movement inductive load burns out the contact, causes the time of work not drag and stops, therefore the service life of relay itself is lower, and the inductive load work-hours of each Control do not wait, and causes each load economical life not waited, so that retarder is aging unbalanced, cause self-excitation type liquid-cooled retarder bulk life time to reduce, use cost raises.
Summary of the invention
The objective of the invention is for a kind of intelligence controlling device of self-excitation retarder is provided, take monolithic specialized high-speed CPU as core, become digital signal by the signal that detects from speed sensor, temperature sensor, ABS signal, the signal that cruises, arm cook through analogue to digital conversion, in time feed back automobile driving speed by receiving from the pulse of speed sensor through F-V conversion formation speed data.The various data that collect adopt the CAN signalling methods to realize and vehicle body real-time Communication for Power usefulness through the CPU calculation process, with the ratio of PWM pulse width modulation mode control high-power switch tube ON time, reach the purpose of control retarder coil current size.Also has simultaneously the artificial intelligence managerial ability: comprise the protection of misoperation, the protection of temperature anomaly, the realization of automatic cruise mode.This automobile-used self-excitation type liquid-cooled retarder electronic control package comprises the microprocessor clock circuit, reset circuit, the feed circuit of 24V ~ 5V, input gear switch circuit, speed sensor analog input circuit 1, temperature sensor analog input circuit 2, the ABS input circuit, signal input circuit cruises, the gear indicator light circuit, the misoperation breaking circuit, serial communication circuit, the CAN communication circuit, the high-power output circuit of stoplight stop lamp control circuit and exciting current, wherein the speed sensor analog input circuit 1, temperature sensor analog input circuit 2, ABS input circuit and the signal input circuit that cruises form the data acquisition module circuit.This is one of innovative point of patent of the present invention.
To achieve these goals, the present invention has taked following technical scheme, and the present invention will be further described in conjunction with Fig. 1～Figure 10:
As shown in Figure 1, the model of microprocessor U1 is MC9S12XS64, and microprocessor U1 interface PT0, PT1, PT2, PT3 are connected with input gear switch circuit, the switching of control self-excitation type liquid-cooled retarder gear; Microprocessor U1 interface PT7, PT5, PT2, PT6, PAD00 are connected with the data acquisition module circuit, collecting temperature, speed, cruise, the ABS signal; The system power supply modular circuit is connected with microprocessor U1 interface VDDR, VSS1, power supply is provided for microprocessor and each modular circuit; The EXTAL of microprocessor U1 and XTAL pin are used for clock circuit, clock circuit is extremely important to the operation of whole control system, adopt the typical clock circuit of MC9S12 micro controller system, the external crystal-controlled oscillation X1 by a 16MHz is connected on the external crystal-controlled oscillation input interface EXTAL and XTAL of micro controller system.The interface PA3 of microprocessor U1 is connected the prompting retarder and starts working with the stoplight stop lamp control circuit, the misoperation breaking circuit connects the interface PMW4 of microprocessor U1, the interface PWM1 of microprocessor U1, PWM0 is connected with the high-power output circuit of exciting current, the different pwm pulse of difference output according to gear, the high-power output circuit mouth of described exciting current is connected to self-excitation type liquid-cooled retarder stator coil, according to the different exciting current of PWM pulse duration modulation output, thereby the lock torque of control self-excitation type liquid-cooled retarder, microprocessor U1 interface TXCAN0, RXCAN0 is connected the real-time Communication for Power that realizes with automobile with CAN communication module circuit.
As shown in Figure 2, described brake light circuit comprises relay R ELAY1, sustained diode 1 and stoplight stop lamp BRAKE_LIGHT, and relay R ELAY1 selects the relay of Lu Changkai output.Specifically relay R ELAY1 input end pin is connected on the PA3 pin of microprocessor U1, another pin ground connection of relay R ELAY1 input end, two pins of relay R ELAY1 mouth connect respectively two electric wires of the stoplight stop lamp of automobile, and sustained diode 1 of reversal connection between two wires of relay input end, be the positive ground of sustained diode 1, sustained diode 1 negative pole connects the PA3 pin of microprocessor U1.Wherein stoplight stop lamp BRAKE_LIGHT is the stoplight stop lamp of automobile self, and relay R ELAY1 selects the relay of Lu Changkai output.If retarder work, then relay R ELAY1 often open the mouth closure, light the stoplight stop lamp BRAKE_LIGHT of automobile, this also is one of innovative point of patent of the present invention.
As shown in Figure 3, the handle H1 of described input gear switch circuit comprises 5 with lead-in wire, i.e. a common port 0 and four gear lead-in wires 1,2,3,4; Four gear lead-in wires 1,2,3,4 of handle H1 are the end of contact resistance R1, R2, R3, R4 respectively, the base stage of the other end connecting triode positive-negative-positive switch triode Q1 of resistance R 1, R2, R3, R4, Q2, Q3, Q4, common port 0 ground connection of handle H1, the emitter of aerotron Q1, Q2, Q3, Q4 all connects+and the 5V power supply is VDD; Aerotron Q1, Q2, Q3, the collecting electrode of Q4 connects respectively the interface PT0 of microprocessor U1, PT1, PT2, PT3, while aerotron Q1, Q2, Q3, the collecting electrode of Q4 also will be distinguished contact resistance R5, R6, R7, the end of R8, resistance R 5, R6, R7, the other end ground connection of R8, and resistance R 5, R6, R7, R8 is parallel capacitance C1 respectively, C2, C3, C4, the interface PB0 of microprocessor U1, PB5, PB6, PB7 connects respectively four resistance R 12, R11, R10, the end of R9, resistance R 12, R11, R10, the other end of R9 connects four light-emitting diode LE4, LE3, LE2, the negative pole of LE1, light-emitting diode LE4, LE3, LE2, the LE1 positive pole all connects+5V power vd D.Input gear switch circuit has the function that gear switches arbitrarily, and the gear of handle determines the break-make of four aerotrons, and which gear retarder be operated in and light with regard to the light emitting diode of corresponding several indications, shows the state of input gear.Input gear switch circuit links to each other with microprocessor PT0, PT1, PT2, PT3 pin, directly the pwm pulse dutycycle of micro controller system managed, as long as the driver stirs the driving lever of handle H1, just can control microprocessor work, reach the effect of control self-excitation retarder lock torque.This part circuit is one of innovative point of patent of the present invention.
As shown in Figure 4, described system power supply power module circuitry structure is, vehicle-mounted+24V positive source is connected with resettable fuse F1, capacitor C 10, and an end of capacitor C 10 is connected with F1, other end ground connection; When being connected with capacitor C 10, wire fuse F1 connects the negative earth of capacitor C 11 with inductance L 1, resistance R 14, capacitor C 11 positive poles; Capacitor C 11, diode TVS1 and capacitor C 12 parallel connections, capacitor C 11 positive poles are connected with diode TVS1 negative pole, capacitor C 11 negative poles, diode TVS1 positive pole are connected with capacitor C that negative pole connects and ground connection, and capacitor C 12 anodal input end 1 pin that are connected power supply chip U2 with diode TVS1 negative pole; Power supply chip U2 selects TLE4275 Special vehicle-mounted chip; mouth 5 pin of power supply chip U2 are that VCC is+5V; 5 pin connect 1 pin of overvoltage protection diode D3 simultaneously; the model of overvoltage protection diode D3 is BZX84C8V2; 3 pin of overvoltage protection diode D3 connect VDD; mouth 5 pin of power supply chip U2 and capacitor C 14 positive poles are connected simultaneously; capacitor C 14 negative earths; capacitor C 14 is in parallel with C15 again; connecting resistance R15 between 5 pin of power supply chip U2 and 2 pin; the 3 pin ground connection of power supply chip U2,4 pin of power supply chip U2 connect capacitor C 13 1 ends, capacitor C 13 other end ground connection.The system power supply power module circuitry is the circuit that suitable power source is provided to the modules circuit.U2 is low-power consumption+5V pio chip, at input end access 750mA resettable fuse F1, when circuit is short-circuited or transship circuit is limited and protects.After fault was got rid of, resettable fuse formed conductive path again, finishes the protection to circuit, need not manually change.Among Fig. 4+and 24V is the vehicle power access, R14, L1 and C10, C11, C12 form filter circuit jointly in the peripheral circuit.Simultaneously, input end 1 pin that diode TVS1 reversal connection is entered U2 prevents short circuit.Carry out high frequency noise filtering with electric capacity C14, C15 between output end power VCC and the ground GND; VCC forms another after processing through overvoltage protection diode D3+VDD of 5V; play the effect of insulating power supply; in order to power to ECU; to guarantee the stable operation of micro controller system, this is one of innovative point of patent of the present invention.
As shown in Figure 5, described data acquisition module circuit comprises speed sensor analog input circuit 1, temperature sensor analog input circuit 2, ABS input circuit and the signal input circuit that cruises, concrete structure is that voltage comparable chip U5 selects LM324, there are 4 operational amplification circuits voltage comparable chip LM324 inside, and this circuit only uses wherein three op amps as voltage comparator.The pin TACH+ that the signal wire (SW) Speed of speed sensor directly connects F-V conversion chip U4 is 1 pin, the model of F-V conversion chip U4 is LM2917, the pin EMTT voltage of F-V conversion chip U4 i.e. 5 pin voltages is voltage Speed_Control corresponding to car speed sensor that speed sensor collects, the end of the 5 pin contact resistance R23 of F-V conversion chip U4,2 pin that the other end of resistance R 23 connects voltage comparable chip U5 are the wherein reverse input end 1IN-of first op amp of U5,3 pin of voltage comparable chip U5 are positive input 1IN+ contact resistance R24 one end of first op amp, resistance R 24 other ends connect respectively 1 pin of two adjustable potentiometer R21,3 pin of R22,2 of adjustable potentiometer R21,3 pin all meet power supply VCC, 1 of adjustable potentiometer R22, the equal ground connection of 2 pin, adjustable potentiometer R21, R22, the voltage of the common point of R24 is the minimum threshold criteria voltage of comparator, this reference voltage is by regulating adjustable potentiometer R21, magnitude of voltage corresponding to minimum vehicle speed signal when R22 reaches retarder work, 1 pin of voltage comparable chip U5 i.e. the PT7 pin of the mouth 1OUT connection U1 of this op amp, when the speed of a motor vehicle was lower than this minimum threshold values, retarder automatically quit work and avoids the wasting of resources; The end of the 5 pin contact resistance R25 of F-V conversion chip U4,5 pin that the other end of resistance R 25 connects voltage comparable chip U5 are the positive input 2IN+ of second op amp of U5,6 pin of voltage comparable chip U5 i.e. reverse input end 2IN-contact resistance R26 one end of second op amp, resistance R 26 other ends meet respectively two adjustable potentiometer R27,3 pin of R28,1 of adjustable potentiometer R28,2 pin all meet power supply VCC, 1 of adjustable potentiometer R27, the equal ground connection of 2 pin, adjustable potentiometer R26, R27, threshold values reference voltage in the middle of the voltage of the common point of R28 is, this reference voltage is by regulating adjustable potentiometer R27, the magnitude of voltage of corresponding speed sensor when automobile driving speed was middling speed when R28 reached retarder work, 7 pin of voltage comparable chip U5 are the PA2 pin that the mouth 2OUT of second op amp of U1 connects U1, when the speed of a motor vehicle was higher than minimum threshold values and be lower than this centre threshold values, retarder automatically shut down wherein two each and every one gears; The end of the 5 pin contact resistance R29 of F-V conversion chip U4,10 pin that the other end of resistance R 29 connects voltage comparable chip U5 are the positive input 3IN+ of the 3rd op amp of U5,9 pin of U5 i.e. reverse input end 3IN-contact resistance R30 one end of the 3rd op amp, resistance R 30 other ends meet respectively two adjustable potentiometer R31,3 pin of R32,1 of adjustable potentiometer R32,2 pin all meet power supply VCC, 1 of adjustable potentiometer R31, the equal ground connection of 2 pin, adjustable potentiometer R30, R31, the voltage of the common point of R32 is the highest threshold values reference voltage, this reference voltage is by regulating adjustable potentiometer R31, the magnitude of voltage of corresponding speed sensor when automobile driving speed was high speed when R32 reached retarder work, 8 pin of voltage comparable chip U5 are the PT5 pin that the mouth 3OUT of the 3rd op amp of microprocessor U1 connects U1, threshold values and be lower than this during high threshold values in the middle of the speed of a motor vehicle is higher than, retarder automatically shuts down one of them gear, when the speed of a motor vehicle is higher than this during high threshold values, when the driver stirred the retarder gear to fourth gear, four gears of retarder all worked.4 pin of U5 meet VCC, the 11 pin ground connection of U5.
As shown in Figure 5, temperature sensor signal line Temp connects 2 pin of overvoltage protection diode D4, the model of D4, D5, D6 is BAS21S, the end of the 3 pin connecting resistance R16 of D4, another termination VCC of R16, connect an end of capacitor C 16 in the time of the end of the 3 pin connecting resistance R16 of D4, the other end ground connection of C16,3 pin of D4 connect the PT6 pin of microprocessor U1 simultaneously; The signal wire (SW) Cruise that cruises connects 2 pin of diode D5, the end of the 3 pin connecting resistance R17 of D5 connects an end of capacitor C 17 in the time of another termination VCC of R17, the end of the 3 pin connecting resistance R17 of D5, the other end ground connection of C17,3 pin of D5 connect the PT4 pin of microprocessor U1 simultaneously; The ABS signal wire (SW) connects 2 pin of diode D6, the end of the 3 pin connecting resistance R18 of D6 connects an end of capacitor C 18 in the time of another termination VCC of R18, the end of the 3 pin connecting resistance R18 of D6, the other end ground connection of C18,3 pin of D6 connect the PAD00 pin of microprocessor U1 simultaneously.
The speed signal of data acquisition module circuit is by the F-V conversion chip, the vehicle speed pulse signal is converted to voltage signal, the velocity voltage signal is through voltage comparable chip U5 access microprocessor U1's, speed signal is made as three threshold values, realize that the speed of a motor vehicle automatically shuts down the self-excitation type liquid-cooled retarder when being low speed driving, the speed of a motor vehicle automatically shuts down wherein one or two gear of retarder when driving at moderate speed, the speed of a motor vehicle is when running at high speed, retarder normal operation when the driver stirs retarder to fourth gear should thereby avoid maloperation and the wasting of resources to reach more intelligent control.Use the ADC module of microprocessor U1 inside to detect to temperature, ABS, the signal that cruises, adopt BAS21S overvoltage protection diode to carry out AD and gather, the stability of intensifier circuit, this is one of innovative point of patent of the present invention.
As shown in Figure 6, data acquisition module circuit F-V change-over circuit is the peripheral circuit of F-V conversion chip U4 in Fig. 5 data acquisition module circuit, the model of F-V conversion chip U4 is LM2917,1 pin of F-V conversion chip U4 is connected signal wire (SW) and is connected with speed sensor, 2 pin of F-V conversion chip U4 are connected an end and are connected with capacitor C, the other end of capacitor C 43 connects with ground, 3 pin of F-V conversion chip U4 are connected 3 pin and are connected with potential device R41, the model of potential device is 3296W, 1 of potential device R41,2 pin all connect with ground, 4 pin of F-V conversion chip U4 are connected with capacitor C anodal the connection, capacitor C 41 negative poles connect with ground, 3 pin of F-V conversion chip U4 directly are connected with 4 pin, 5 pin of U4 are connected 3 pin and are connected with potential device R42,1 of potential device R42,2 pin all connect with ground, 5 pin of F-V conversion chip U4 with are connected pin and directly connect, simultaneously 5 pin of F-V conversion chip U4 be connected the resistance R 27 of data acquisition module circuit and connect, 8 pin of F-V conversion chip U4 connect+5V power supply VCC, the end of the 9 pin connecting resistance R43 of F-V conversion chip U4, another termination of resistance R 43+5V power supply VCC, 11 pin of F-V conversion chip U4 and the equal ground connection of 12 pin.
As shown in Figure 7, described misoperation breaking circuit adopts positive-negative-positive switch triode Q6 as switch circuit, retarder main supply switch K1 is installed in the driver driving chamber, one wire contact resistance R35, one end of K switch 1, another wire ground connection of K1, the other end connecting triode Q6 base stage of R35, the emitter of Q6 connects+5V power vd D, the collecting electrode of Q6 connects the PWM4 pin of microprocessor U1, the collecting electrode of Q6 connects an end of a resistance R 36 simultaneously, the other end ground connection of R36, and resistance R 36 capacitor C 36 in parallel.Retarder misoperation K switch 1 is installed in the driver driving chamber, and when misoperation, the driver is stopcock K1 immediately.
As shown in Figure 8, the end of the pin PWM0 contact resistance R37 that the high-power output circuit concrete structure of described exciting current is microprocessor U1, the other end of resistance R 37 connects the base stage of NPN type aerotron Q8, the collecting electrode of NPN type aerotron Q8 is connected with an end of resistance R 38, other end connection+5V power vd the D of resistance R 38, the emitter of NPN type aerotron Q8 connects+ground of 5V power vd D, be connected that input end 2 pin of U12 connect with high-power switch tube BTS550P when the collecting electrode of NPN type aerotron Q8 is connected with resistance R 38 1 ends, 4 pin of high-power switch tube U12 connect an end of capacitor C 37, capacitor C 37 another termination vehicle power+24V negative poles, 5 pin of high-power switch tube U12 continue when being connected with 1 pin 2 pin of stream diode D12 and the end electric wire of retarder stator exciting coil RL33, the model of sustained diode 12 is MBRF40250, sustained diode 121,3 pin connect vehicle power+24V negative pole when connecting, the other end electric wire of retarder stator exciting coil RL33 connects vehicle power+24V negative pole, it is anodal that 3 pin of high-power switch tube U12 meet vehicle power+24V, the end of the 3 pin series resistance R39 of while high-power switch tube U12, the other end of resistance R 39 connects capacitor C 38 1 ends, and the other end of capacitor C 38 connects 5 pin of high-power switch tube U12.The electric current of the high-power output circuit output of exciting current is the required exciting current of self-excitation type liquid-cooled retarder self power generation, conversion modulation (PWM) pulsewidth by input gear switch circuit gear changes the ON time that high-power switch tube BTS550P is U12, thereby regulate the size of exciting current, the lock torque of control retarder, the safety and stability that have improved self-excitation type liquid-cooled retarder control system.This is one of innovative point of patent of the present invention.
Micro processor leg figure as shown in Figure 9, U1 is this device selected microprocessor when building, model is the MC9S12XS64 micro controller system of FREESCALE company, can certainly select ARM, DSP, FPGA family chip.
The microprocessor software main program flow chart is the key step of microprocessor U1 software programming as shown in figure 10, and the present invention adopts all modules of software of C language compilation.Main program is the key link of control software, calling and coordinating according to state control modules.It comprises judges whether starting state of vehicle, whether antiblock device ABS works, if antiblock device ABS has worked, then automatically change the retarder init state over to, if antiblock device ABS is work not, then carry out corresponding data acquisition module, input gear detection module, brake control module, communication module and temperature and Speed display module.Main program is a loop body, and after the retarder operation, as long as no interrupt request, it moves in this loop body always.
To those skilled in the art, clearly, the present invention can make multiple improvement and variation, if fall into appending claims and the scope that is equal in, these improvement of the present invention and variation are just contained in the present invention.
From the development tendency of present automotive electronic technology, the electronic control system of retarder is an inexorable trend to intelligent, hommization future development.The present invention's intelligentized slow control setup on the high-end markets such as palace car has wide market outlook.
Description of drawings
Fig. 1 electrical block diagram of the present invention;
Fig. 2 stoplight stop lamp control circuit of the present invention figure;
Fig. 3 the present invention inputs the gear switch circuit diagram;
Fig. 4 system power supply power module circuitry of the present invention figure;
Fig. 5 data acquisition module circuit diagram of the present invention;
Fig. 6 data acquisition module F-V of the present invention change-over circuit figure;
Fig. 7 misoperation breaking circuit of the present invention figure;
The high-power output circuit figure of Fig. 8 exciting current of the present invention;
Fig. 9 micro processor leg figure of the present invention;
Figure 10 microprocessor software main program flow chart of the present invention.
The specific embodiment
Above summary of the invention is the very detailed specific embodiment that this invention must be described, and the below just repeats no more.
Claims (1)
1. automobile-used self-excitation type liquid-cooled retarder electronic control package, it is characterized in that, self-excitation type liquid-cooled retarder circuit structure comprises the microprocessor clock circuit, reset circuit, the feed circuit of 24V ~ 5V, input gear switch circuit, speed sensor analog input circuit 1, speed sensor analog input circuit 2, the ABS input circuit, signal input circuit cruises, the gear indicator light circuit, the misoperation breaking circuit, serial communication circuit, the CAN communication circuit, the high-power output circuit of stoplight stop lamp control circuit and exciting current, wherein the speed sensor analog input circuit 1, speed sensor analog input circuit 2, ABS input circuit and the signal input circuit that cruises form the data acquisition module circuit;
The model of microprocessor U1 is MC9S12XS64, microprocessor U1 interface PT0, PT1, PT2, PT3 is connected with input gear switch circuit, microprocessor U1 interface PT7, PT5, PT2, PT6, PAD00 is connected with the data acquisition module circuit, system power supply modular circuit and microprocessor U1 interface VDDR, VSS1 connects, the interface PA3 of microprocessor U1 is connected with the stoplight stop lamp control circuit, the misoperation breaking circuit connects the interface PMW4 of microprocessor U1, the interface PWM1 of microprocessor U1, PWM0 is connected with the high-power output circuit of exciting current, the high-power output circuit mouth of described exciting current is connected to self-excitation type liquid-cooled retarder stator coil, microprocessor U1 interface TXCAN0, RXCAN0 is connected with CAN communication module circuit;
Described stoplight stop lamp control circuit comprises relay R ELAY1, sustained diode 1 and stoplight stop lamp BRAKE_LIGHT, and wherein stoplight stop lamp BRAKE_LIGHT is the stoplight stop lamp of automobile self, and relay R ELAY1 selects the relay of Lu Changkai output; Specifically relay R ELAY1 input end pin is connected on the PA3 pin of microprocessor U1, another pin ground connection of relay R ELAY1 input end, two pins of relay R ELAY1 mouth connect respectively two electric wires of the stoplight stop lamp of automobile, and sustained diode 1 of reversal connection between two wires of relay input end, be the positive ground of sustained diode 1, sustained diode 1 negative pole connects the PA3 pin of microprocessor U1;
The handle H1 of described input gear switch circuit comprises 5 lead-in wires, i.e. a common port 0 and four gear lead-in wires 1,2,3,4; Four gear lead-in wires 1,2,3,4 of handle H1 are the end of contact resistance R1, R2, R3, R4 respectively, the base stage of the other end connecting triode positive-negative-positive switch triode Q1 of resistance R 1, R2, R3, R4, Q2, Q3, Q4, common port 0 ground connection of handle H1, the emitter of aerotron Q1, Q2, Q3, Q4 all connects+and the 5V power supply is VDD; Aerotron Q1, Q2, Q3, the collecting electrode of Q4 connects respectively the interface PT0 of microprocessor U1, PT1, PT2, PT3, while aerotron Q1, Q2, Q3, the collecting electrode of Q4 also will be distinguished contact resistance R5, R6, R7, the end of R8, resistance R 5, R6, R7, the other end ground connection of R8, and resistance R 5, R6, R7, R8 is parallel capacitance C1 respectively, C2, C3, C4, the interface PB0 of microprocessor U1, PB5, PB6, PB7 connects respectively four resistance R 12, R11, R10, the end of R9, resistance R 12, R11, R10, the other end of R9 connects four light-emitting diode LE4, LE3, LE2, the negative pole of LE1, light-emitting diode LE4, LE3, LE2, the LE1 positive pole all connects+5V power vd D;
Described system power supply power module circuitry structure is, vehicle-mounted+24V positive source is connected with resettable fuse F1, capacitor C 10, and an end of capacitor C 10 is connected with F1, other end ground connection; When being connected with capacitor C 10, wire fuse F1 connects the negative earth of capacitor C 11 with inductance L 1, resistance R 14, capacitor C 11 positive poles; Capacitor C 11, diode TVS1 and capacitor C 12 parallel connections, capacitor C 11 positive poles are connected with diode TVS1 negative pole, capacitor C 11 negative poles, diode TVS1 positive pole are connected with capacitor C that negative pole connects and ground connection, and capacitor C 12 anodal input end 1 pin that are connected power supply chip U2 with diode TVS1 negative pole; Power supply chip U2 selects TLE4275 Special vehicle-mounted chip, mouth 5 pin of power supply chip U2 are that VCC is+5V, 5 pin connect 1 pin of overvoltage protection diode D3 simultaneously, the model of overvoltage protection diode D3 is BZX84C8V2,3 pin of overvoltage protection diode D3 connect VDD, mouth 5 pin of power supply chip U2 and capacitor C 14 positive poles are connected simultaneously, capacitor C 14 negative earths, capacitor C 14 is in parallel with C15 again, connecting resistance R15 between 5 pin of power supply chip U2 and 2 pin, the 3 pin ground connection of power supply chip U2,4 pin of power supply chip U2 connect capacitor C 13 1 ends, capacitor C 13 other end ground connection;
Described data acquisition module circuit comprises speed sensor analog input circuit 1, speed sensor analog input circuit 2, ABS input circuit and the signal input circuit that cruises, specifically the voltage comparable chip U5 of speed sensor analog input circuit 1 selects LM324, there are 4 operational amplification circuits voltage comparable chip LM324 inside, and this circuit only uses wherein three op amps as voltage comparator; The pin TACH+ that the signal wire (SW) Speed of speed sensor directly connects F-V conversion chip U4 is 1 pin, the model of F-V conversion chip U4 is LM2917, the pin EMTT voltage of F-V conversion chip U4 i.e. 5 pin voltages is voltage Speed_Control corresponding to car speed sensor that speed sensor collects, the end of the 5 pin contact resistance R23 of F-V conversion chip U4,2 pin that the other end of resistance R 23 connects voltage comparable chip U5 are the wherein reverse input end 1IN-of first op amp of U5,3 pin of voltage comparable chip U5 are positive input 1IN+ contact resistance R24 one end of first op amp, resistance R 24 other ends connect respectively 1 pin of two adjustable potentiometer R21,3 pin of R22,2 of adjustable potentiometer R21,3 pin all meet power supply VCC, 1 of adjustable potentiometer R22, the equal ground connection of 2 pin, 1 pin of voltage comparable chip U5 i.e. the PT7 pin of the mouth 1OUT connection U1 of this op amp; The end of the 5 pin contact resistance R25 of F-V conversion chip U4,5 pin that the other end of resistance R 25 connects voltage comparable chip U5 are the positive input 2IN+ of second op amp of U5,6 pin of voltage comparable chip U5 i.e. reverse input end 2IN-contact resistance R26 one end of second op amp, resistance R 26 other ends meet respectively two adjustable potentiometer R27,3 pin of R28,1 of adjustable potentiometer R28,2 pin all meet power supply VCC, 1 of adjustable potentiometer R27, the equal ground connection of 2 pin, 7 pin of voltage comparable chip U5 are the PA2 pin that the mouth 2OUT of second op amp of U1 connects U1; The end of the 5 pin contact resistance R29 of F-V conversion chip U4,10 pin that the other end of resistance R 29 connects voltage comparable chip U5 are the positive input 3IN+ of the 3rd op amp of U5,9 pin of U5 i.e. reverse input end 3IN-contact resistance R30 one end of the 3rd op amp, resistance R 30 other ends meet respectively two adjustable potentiometer R31,3 pin of R32,1 of adjustable potentiometer R32,2 pin all meet power supply VCC, 1 of adjustable potentiometer R31, the equal ground connection of 2 pin, 8 pin of voltage comparable chip U5 are the PT5 pin that the mouth 3OUT of the 3rd op amp of microprocessor U1 connects U1; 4 pin of U5 meet VCC, the 11 pin ground connection of U5;
Temperature sensor signal line Temp connects 2 pin of overvoltage protection diode D4, the model of D4, D5, D6 is BAS21S, the end of the 3 pin connecting resistance R16 of D4, another termination VCC of R16, connect an end of capacitor C 16 in the time of the end of the 3 pin connecting resistance R16 of D4, the other end ground connection of C16,3 pin of D4 connect the PT6 pin of microprocessor U1 simultaneously; The signal wire (SW) Cruise that cruises connects 2 pin of diode D5, the end of the 3 pin connecting resistance R17 of D5 connects an end of capacitor C 17 in the time of another termination VCC of R17, the end of the 3 pin connecting resistance R17 of D5, the other end ground connection of C17,3 pin of D5 connect the PT4 pin of microprocessor U1 simultaneously; The ABS signal wire (SW) connects 2 pin of diode D6, the end of the 3 pin connecting resistance R18 of D6 connects an end of capacitor C 18 in the time of another termination VCC of R18, the end of the 3 pin connecting resistance R18 of D6, the other end ground connection of C18,3 pin of D6 connect the PAD00 pin of microprocessor U1 simultaneously;
Data acquisition module F-V change-over circuit is the peripheral circuit of F-V conversion chip U4 in the described data acquisition module circuit, data acquisition module F-V change-over circuit the model of F-V conversion chip U4 be LM2917,1 pin of F-V conversion chip U4 is connected signal wire (SW) and is connected with speed sensor, 2 pin of F-V conversion chip U4 are connected an end and are connected with capacitor C, the other end of capacitor C 43 connects with ground, 3 pin of F-V conversion chip U4 are connected 3 pin and are connected with potential device R41, the model of potential device is 3296W, 1 of potential device R41,2 pin all connect with ground, 4 pin of F-V conversion chip U4 are connected with capacitor C anodal the connection, capacitor C 41 negative poles connect with ground, 3 pin of F-V conversion chip U4 directly are connected with 4 pin, 5 pin of U4 are connected 3 pin and are connected with potential device R42,1 of potential device R42,2 pin all connect with ground, 5 pin of F-V conversion chip U4 with are connected pin and directly connect, simultaneously 5 pin of F-V conversion chip U4 be connected the resistance R 27 of data acquisition module circuit and connect, 8 pin of F-V conversion chip U4 connect+5V power supply VCC, the end of the 9 pin connecting resistance R43 of F-V conversion chip U4, another termination of resistance R 43+5V power supply VCC, 11 pin of F-V conversion chip U4 and the equal ground connection of 12 pin;
Described misoperation breaking circuit adopts positive-negative-positive switch triode Q6 as switch circuit, retarder main supply switch K1 is installed in the driver driving chamber, one wire contact resistance R35, one end of K switch 1, another wire ground connection of K1, the other end connecting triode Q6 base stage of R35, the emitter of Q6 connects+5V power vd D, the collecting electrode of Q6 connects the PWM4 pin of microprocessor U1, the collecting electrode of Q6 connects an end of a resistance R 36 simultaneously, the other end ground connection of R36, and resistance R 36 capacitor C 36 in parallel;
The end of the pin PWM0 contact resistance R37 that the high-power output circuit concrete structure of described exciting current is microprocessor U1, the other end of resistance R 37 connects the base stage of NPN type aerotron Q8, the collecting electrode of NPN type aerotron Q8 is connected with an end of resistance R 38, other end connection+5V power vd the D of resistance R 38, the emitter of NPN type aerotron Q8 connects+ground of 5V power vd D, be connected that input end 2 pin of U12 connect with high-power switch tube BTS550P when the collecting electrode of NPN type aerotron Q8 is connected with resistance R 38 1 ends, 4 pin of high-power switch tube U12 connect an end of capacitor C 37, capacitor C 37 another termination vehicle power+24V negative poles, 5 pin of high-power switch tube U12 continue when being connected with 1 pin 2 pin of stream diode D12 and the end electric wire of retarder stator exciting coil RL33, the model of sustained diode 12 is MBRF40250, sustained diode 121,3 pin connect vehicle power+24V negative pole when connecting, the other end electric wire of retarder stator exciting coil RL33 connects vehicle power+24V negative pole, it is anodal that 3 pin of high-power switch tube U12 meet vehicle power+24V, the end of the 3 pin series resistance R39 of while high-power switch tube U12, the other end of resistance R 39 connects capacitor C 38 1 ends, and the other end of capacitor C 38 connects 5 pin of high-power switch tube U12.
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| CN103057425B (en) | 2016-01-13 |
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