CN2869953Y

CN2869953Y - Hybrid-power controller for light hybrid power automobile

Info

Publication number: CN2869953Y
Application number: CNU2006201099585U
Authority: CN
Inventors: 罗禹贡; 金达锋; 李克强; 宋玮; 任勇; 周安健; 张永生; 杜昌松; 赵川林
Original assignee: Tsinghua University; Chongqing Changan Automobile Co Ltd
Current assignee: Tsinghua University; Chongqing Changan Automobile Co Ltd
Priority date: 2006-02-16
Filing date: 2006-02-16
Publication date: 2007-02-14
Anticipated expiration: 2016-02-16

Abstract

This utility model requests protection of a hybrid power control used for hybrid power vehicles. The HCU controller assembly comprises a box, monolithic processor mounted in the box and control unit in the monolithic processor, monolithic processor reset circuit connected with the monolithic processor, CAN communication processing circuit, power supply circuit for monolithic processor and circuit for isolating power supply, and aviation sockets connected respectively with the power supply circuit for monolithic processor and CAN communication processing circuit. This utility model eliminates the processing of plenty of peripheral signals, improves the entire car control strategy by execution of processing speed via monolithic-processor-centered hardware structure and provides in-line commissioning. Moreover, a plurality of designs for resistance to electromagnetic interference is used, ensuring that the controller has a good resistance to interference. All these contribute to meeting the objective of fuel consumption and optimal exhaust of the entire car.

Description

The mild hybrid electric vehicle hybrid controller

Technical field

The utility model belongs to the automobile control technology, is specifically related to a kind of hybrid power (HCU) controller that is used for hybrid vehicle.

Background technology

The HCU control assembly is the crucial control assembly in PHEV car load operation sensing and the reaction system, and its performance quality will directly influence the vehicle performance quality.Existing HCU differently has different architectural characteristics according to what the difference (parallel connection, series connection, series-parallel connection) of PHEV self structure and car load control required.As disclosed technology in " research and development of parallel type hybrid dynamic vapour power vehicle multi-energy power assembly control module " (" hi-tech communication " 02 phase in 2003) literary composition, this system has utilized DSP technical design PHEV HCU control assembly (its core processor is selected the TMS320LF2407A of TI company for use), its structured flowchart as shown in Figure 1, it mainly comprises controller local area network CAN, serial communication interface RS232, A/D, I/O input, I/O output, PWM input and PWM output.Though this HCU controller can be finished the effective control to car load, realize the basic function of car load, the control effect is relatively poor aspect car load oil consumption and emission behavior.This controller is owing to comprise a large amount of peripheral signal treatment circuits simultaneously, its controller not only will be finished the realization of integrated vehicle control tactics, and need to carry out a large amount of signals collecting and Processing tasks, certain limitation is arranged when realizing comparatively complicated control strategy and algorithm.This controller lacks hardware on-line debugging system in addition, is not easy to the problem of discovery in real time in the real vehicle debugging.

Summary of the invention

The purpose of this utility model is for overcoming the weak point of prior art, design a kind of mild hybrid electric vehicle HCU controller, it is the hardware configuration at center that this controller adopts with the single-chip microcomputer, improve processing speed, has the on-line debugging function, improve antijamming capability, to realize car load oil consumption and the best controlled target of discharging.

The HCU controller of the hybrid vehicle that the utility model proposes comprises: a box body and be installed in the single-chip microcomputer in the box body and be arranged on control module in the single-chip microcomputer, the reset circuit of SCM that links to each other with this single-chip microcomputer, CAN communication treatment circuit, single-chip microcomputer feed circuit and insulating power supply circuit, and the aviation socket that links to each other with CAN communication treatment circuit with the single-chip microcomputer feed circuit respectively.

Described single-chip microcomputer obtains whole vehicle state information by the CAN bus, and carries out the judgement of PHEV duty, carries out energy distribution according to the control strategy of setting between each power source.

Described reset circuit of SCM is made up of power supply monitoring chip and peripheral cell, the stability of monitoring single-chip microcomputer supply voltage.When voltage exceeds the permission working range, produce reset signal, single-chip microcomputer restarts.

Described CAN communication treatment circuit is made up of photoelectric isolated chip and CAN bus level conversion chip and peripheral cell thereof, and optoelectronic isolating element is used for signal on the CAN bus and single-chip microcomputer are isolated, and reduces the influence of external disturbance to single-chip microcomputer; CAN bus level conversion chip is used to realize the conversion of CAN signal to the bus differential level.

Described single-chip microcomputer feed circuit are made up of with reverse-phase protection and filtering circuit power module of voltage regulation and overvoltage thereof, be mainly single-chip microcomputer 5V is provided burning voltage, avoid being subjected to the influence of external voltage fluctuation to single-chip microcomputer work.

The insulating power supply circuit is made up of insulating power supply and filtering circuit, and being mainly CAN bus signals level transferring chip provides driving voltage and provide drive current for bus.

The aviation plug connector is used to provide power supply and CAN communication interface, cooperates with box body simultaneously to realize waterproof and dustproof, anti-electromagnetic interference (EMI) requirement, and the control enclosure volume is little, easy for installation.

The control module that is arranged in the single-chip microcomputer comprises hardware driving and signal Processing and two functional modules of control strategy enforcement, wherein hardware driving and signal processing module are finished the processing of processor to the CAN communication information, control strategy enforcement module is responsible for the enforcement in the car load power distribution strategies, realizes the controlled target of car load.

The utility model is simple in structure, easy to operate, compares with existing correlation technique, the utlity model has following advantage: at first under hybrid controller control, car load oil consumption and discharge index have reached optimum target; Secondly because mixed-power controller assembly need not to handle a large amount of peripheral signal,, guaranteed the realization of vehicle performance so can implement integrated vehicle control tactics with very high processing speed; Moreover hybrid controller has the on-line debugging function, the debugging of very convenient control assembly; The additional mixing power controller has adopted the design of multiple anti-electromagnetic interference (EMI), has guaranteed that controller has good antijamming capability; Adopt professional waterproofing design and accurate plug connector to cooperate at last, form totally enclosed control enclosure form, can satisfy the waterproof and dustproof requirement of automobile controller with housing.

Description of drawings

Fig. 1 is existing HCU control assembly block diagram.

Fig. 2 is the structured flowchart of the HCU control assembly that the utility model proposes.

Fig. 3 is the schematic block circuit diagram of an embodiment of the HCU control assembly that the utility model proposes.

Fig. 4 is the signal processing unit process flow diagram of an embodiment of the HCU control assembly that the utility model proposes.

Fig. 5 is the mixed power car system works mode switch figure that the utility model proposed.

Fig. 6 is the mixed power car power division graph of a relation that the utility model proposed

Embodiment

Referring to Fig. 2, the HCU control assembly that the utility model proposes comprises: single-chip microcomputer 1, be arranged on the control module in the single-chip microcomputer, the reset circuit of SCM 4 that links to each other with this single-chip microcomputer, CAN communication treatment circuit 5, single-chip microcomputer feed circuit 2 and insulating power supply circuit 3, and two aviation sockets 6 that link to each other with CAN communication treatment circuit 5 with single-chip microcomputer feed circuit 2 respectively and 7, this single-chip microcomputer also provides download and debug port 8 in addition.These parts are installed in the controller box body 9 of an all-aluminium construction.

The physical circuit that describes this controller below in conjunction with Fig. 3 in detail is realized:

16 singlechip chip U1 (MC9S12DP256) that the single-chip microcomputer of present embodiment adopts MOTOROAL company to produce are used for energy management and system's control of hybrid power system, and it obtains whole vehicle state information by receiving data on the CAN bus;

Reset circuit of SCM is made up of power supply monitoring chip U3 (MC34064) and resistance R 4, R7, switch S 1, diode Q1, link to each other with single-chip microcomputer reset pin (P42 pin) by the printed wiring on the circuit board, be used to monitor the stability of single-chip microcomputer supply voltage, when 10% voltage fluctuation takes place in system voltage, power supply monitoring chip MC34064 produces the signal that single-chip microcomputer is resetted, and guarantees the single-chip microcomputer operate as normal;

CAN communication treatment circuit: be made up of peripheral cells such as photoelectric isolated chip D1 (82C50) and CAN bus level conversion chip D4, D5 (6N137) and resistance R 21 thereof, photoelectric isolated chip sends reception pin (P104, P105 pin) by printed wiring on the circuit board and single-chip microcomputer CAN communication and links to each other.Photoelectric isolated chip D1 (82C50) is used for signal on the CAN bus and single-chip microcomputer are isolated, and reduces the influence of external disturbance to single-chip microcomputer; CAN bus level conversion chip is used to realize the conversion of CAN signal to the bus differential level, plays the hindrance function on the balance bus jointly.

Single-chip microcomputer power supply and bus-powered structure of separating design have been adopted in system's power supply of present embodiment: form the single-chip microcomputer feed circuit by power module of voltage regulation U5 (LM2575) and overvoltage with reverse-phase protection and filtering circuit on the one hand; the power module of voltage regulation output terminal links to each other with single-chip microcomputer energization pins (P13, P41, P65, P83, P84, P107 pin) by the printed wiring on the circuit board, simultaneously the power module of voltage regulation output terminal by the printed wiring on the circuit board to all chip power supplies on the circuit board.Power module of voltage regulation U5 (LM2575) and diode V3; V1 and capacitor C 33, C34 play current limliting, overvoltage and reverse-phase protection effect; C35, C36, C37 play the redundant filter action of secondary; the stable 5V voltage that becomes single-chip microcomputer to use automobile-used 12V power source conversion; power module of voltage regulation LM2575 input range 9-12V; guarantee the stability of system works, avoid being subjected to the influence of external voltage fluctuation single-chip microcomputer work.

On the other hand by insulating power supply module U4 (DCDC12S05) with and C8, C9, C22, the C23 of the redundant filter action of secondary form filtering circuit and constitute the insulating power supply circuit jointly, be used for providing driving voltage and electric current to the CAN bus, the 5V voltage isolation that single-chip microcomputer is used generates CAN bus driver voltage, and insulating power supply module U4 output terminal links to each other by the feeder ear of the printed wiring on the circuit board with photoelectric isolated chip and CAN communication chip for driving (D1, D4, D5).The separately design of feed circuit helps reducing the interference of outer power voltage fluctuation to the single-chip microcomputer operating voltage.

The present embodiment IO interface has adopted two 4 core aviation socket J1 (power supply), J2 (CAN mouth), is respectively applied for power supply and CAN communication interface.Aviation socket J2 links to each other by the output terminal of the printed wiring on the circuit board with CAN communication chip (D1).The good fit HCU of the making control assembly of controller box body and aviation socket satisfies waterproof and dustproof, anti-electromagnetic interference (EMI) designing requirement.

The realization flow of the hardware driving of the signal processing unit of present embodiment and signal Processing and two functional modules of control strategy enforcement may further comprise the steps as shown in Figure 4:

After powering on, enter system start-up behind the system initialization and wait for.When key switch forwards the startup shelves to, finish the initialization of modules such as CAN communication, timer.Enter major cycle subsequently, its flow process is as follows:

(1) judges the mode of operation of PHEV according to a plurality of state parameters such as clutch engagement signal, accelerator pedal position, brake pedal position, gear signal and SOC value of battery.Relation between concrete mode of operation and the various mode of operation as shown in Figure 5, the pattern judgement may further comprise the steps: the judgement that at first is first class mode, be tail-off or unlatching, secondly the judgement of secondary pattern, be to treat speed, operation, promoter pattern under engine is opened, judge three-level schema at last, i.e. braking energy recovery, charging, the subpattern of motor power-assisted under the engine operation;

(2) according to work at present pattern, engine speed and the accelerator pedal position judged, according to the torque demand of car load under the Full Vehicle Dynamics Equation for Calculating present mode;

(3),, carry out the torque distribution of engine and ISG motor according to optimizing ICE curve power distribution strategies according to the car load torque demand.The concrete relations of distribution as shown in Figure 6, when torque demand below a curve and when the b curve is above, engine and motor provide driving torque jointly, when torque demand was between a curve and b curve, engine was carried separately provided driving torque;

(4) whether occur reporting to the police or fault according to current each assembly, carry out the restriction control of the torque of engine and ISG motor, and control such as shut down according to fault level.

Claims

1, a kind of mild hybrid electric vehicle hybrid controller, it is characterized in that it comprises: a controller box body and be installed in the single-chip microcomputer in the box body and be arranged on control module in the single-chip microcomputer, the reset circuit of SCM that links to each other with this single-chip microcomputer, CAN communication treatment circuit, single-chip microcomputer feed circuit and insulating power supply circuit, and the aviation socket that links to each other with CAN communication treatment circuit with the single-chip microcomputer feed circuit respectively;

Described single-chip microcomputer receives data on the CAN bus by being connected with the CAN bus;

Described reset circuit of SCM connects peripheral cell by the power supply monitoring chip and forms, the stability of monitoring single-chip microcomputer supply voltage;

Described CAN communication treatment circuit is made up of photoelectric isolated chip and CAN bus level conversion chip and peripheral cell thereof, and optoelectronic isolating element is used for signal on the CAN bus and single-chip microcomputer are isolated; CAN bus level conversion chip is used to realize the conversion of CAN signal to the bus differential level;

Described single-chip microcomputer feed circuit are made up of with reverse-phase protection and filtering circuit power module of voltage regulation and overvoltage, provide stable operating voltage to single-chip microcomputer;

The insulating power supply circuit is made up of insulating power supply and filtering circuit, driving voltage and electric current is provided for the CAN bus;

The aviation plug connector is the interface of power supply and CAN communication;

Control module in the described single-chip microcomputer comprises hardware driving and signal Processing and two functional modules of control strategy enforcement, wherein hardware driving and signal processing module are finished the processing of processor to the CAN communication information, control strategy enforcement module is responsible for the enforcement in the car load power distribution strategies, realizes the controlled target of car load.