CN1555990A - Mixed power automobile control system and its control method - Google Patents

Mixed power automobile control system and its control method Download PDF

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Publication number
CN1555990A
CN1555990A CNA2003101245116A CN200310124511A CN1555990A CN 1555990 A CN1555990 A CN 1555990A CN A2003101245116 A CNA2003101245116 A CN A2003101245116A CN 200310124511 A CN200310124511 A CN 200310124511A CN 1555990 A CN1555990 A CN 1555990A
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CN
China
Prior art keywords
control unit
combustion engine
engine
motor
bus
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CNA2003101245116A
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Chinese (zh)
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CN1298560C (en
Inventor
卢万成
顾林祥
陈贤章
郭晓潞
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联合汽车电子有限公司
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Priority to CNB2003101245116A priority Critical patent/CN1298560C/en
Publication of CN1555990A publication Critical patent/CN1555990A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/10Vehicle control parameters
    • B60L2240/12Speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/42Drive Train control parameters related to electric machines
    • B60L2240/421Speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/42Drive Train control parameters related to electric machines
    • B60L2240/423Torque
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/44Drive Train control parameters related to combustion engines
    • B60L2240/441Speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/44Drive Train control parameters related to combustion engines
    • B60L2240/443Torque
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/44Drive Train control parameters related to combustion engines
    • B60L2240/445Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/48Drive Train control parameters related to transmissions
    • B60L2240/486Operating parameters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/54Drive Train control parameters related to batteries
    • B60L2240/547Voltage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/54Drive Train control parameters related to batteries
    • B60L2240/549Current
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles

Abstract

A control system for the car with mixed power provided by both IC engine and electric motor is composed of an electronic control unit for IC engine, a mixed powder control unit for regulating the output torque of IC engine via said electronic control unit for IC engine, and a control area bus connected to said two control units for communication between them. Its advantage is high compatibility to existing controller of IC engine system.

Description

Hybrid vehicle control system and control method thereof
Technical field
The present invention relates to vehicle power control system and control method, particularly a kind of control system of hybrid vehicle and control method.
Background technology
Under the dual-pressure of fuel economy and Abgasgesetz, each automaker of the whole world releases electronlmobil one after another over past ten years.Electronlmobil divides three classes usually: pure cell type (BEV), mixed type (HEV), feulcell prototype (FCV).Wherein pure cell type automobile is because of being subjected to the restriction of mileage and electrical network etc., and General Motors (GM), enterprises such as (Toyota) of Toyota have announced to stop producing.And the most important thing of fuel cell powered vehicle to be each big automaker's research and development, companies such as DC, Ford (Ford), GM and Toyota all planned to produce fuel cell powered vehicle in enormous quantities after 10 years.
But the fuel cell motive force heap needs a large amount of noble metal catalysts at present, has hindered further developing of fuel cell powered vehicle.And hybrid vehicle all is better than car powered by conventional energy at aspects such as fuel economy, exhaust emission, drivings, the world car industry member generally believes, before fuel cell powered vehicle arrived, " oil-" hybrid vehicle had best complex energy degree of utilization.In addition, hybrid vehicle also can improve the driving performance, improves and drives enjoyment.For example, hybrid vehicle can be realized idle stop, has fundamentally reduced puzzlement chaufeur and occupant's idle noise.By regenerative braking, the deceleration and stopping performance of hybrid vehicle can be better than internal-combustion engines vehicle of the same type, and prolongs the service life of brake system.
In 10 years from now on, hybrid vehicle, particularly in, the mild hybrid electric vehicle most of share that will progressively capture market for automobiles, and transformation course, play the effect of forming a connecting link from car powered by conventional energy to fuel cell powered vehicle.This shows that hybrid vehicle becomes the optimised form of recent electronlmobil.
Hybrid vehicle mainly reaches energy-conservation by following approach and reduces the purpose of discharging:
(1) reduces the discharge capacity (Downsize) of combustion engine.With certain common 5 car is example, its traditional automobile type configuration 1.7L spark ignition engine, and its slight hybrid power version automobile that mixes only needs configuration 1.3L spark ignition engine.
(2) idle stop (Idle Stop).Owing to adopted high efficiency motor (ISG) and float amount combustion engine, the combustion engine quick start is guaranteed.Therefore when need not driving engine and go out merit, tickover has been exempted in combustion engine oil-break shutdown immediately.
(3) braking energy reclaims (Regenerative brake).Its effect is equivalent to the electric power retarder of heavy-duty vehicle: the rotation of wheel dragging motor, and machine operation is in generator mode, and its outgoing current can be used for the charging to battery pile after the inverter conversion.
(4) optimize the operation area.By the reasonable disposition of combustion engine and motor, combustion engine can be avoided the fallback district to greatest extent.For example, by the acceleration power-assisted of motor, combustion engine still can burn by chemical equivalent under full load; Reduce the internal combustion engine operation velocity band,, reduce throttle loss etc. so that realize efficient lubricating.
The power of hybrid vehicle generally comes self-heating machine and motor.With regard to hot machine, except that this automobile-used heating power machine common in two of spark ignition engine and diesel engine, in U.S. PNGV project, GM, Ford, DC have also developed the stirling engine and the automotive gas turbine of hybrid vehicle special use respectively.But its research conclusion is clearly represented automotive gas turbine and stirling engine type HEV and is difficult to come into the market in foreseeable future.Aspect energy storage, although super capacitor and high speed carbon fiber flywheel have its advantage aspect specific power, the High Performance electrokinetic cell will be dominated market in foreseeable future.
System and control method about hybrid vehicle, can be further referring to people's such as Severinsky U.S. Pat 5343970 A (1994/09) and US2001/0039230 A1 (2001/11), these patent documentations have comparatively intactly been set forth ordinary construction, principle and the control method of hybrid vehicle.
But the control part compatibility of existing hybrid vehicle and existing internal-combustion engine system is relatively poor, in order to satisfy the control requirement of hybrid power, need redesign control system on the whole, the upgrading difficulty, and work capacity is big, therefore causes cost high.
Summary of the invention
The purpose of this invention is to provide a kind of hybrid vehicle control system, it has and has the splendid compatibility of internal-combustion engine system control part now, need not to redesign original control system on the whole and only need make local modification, reduced work capacity, accelerated development progress, design cost is reduced significantly.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of hybrid vehicle control system, the power of described hybrid vehicle is provided by combustion engine and motor, comprising:
Engine electronic control unit, its aperture by the control electronic throttle is adjusted the output torque of combustion engine;
The hybrid power control unit, it is determined the output torque of combustion engine and motor and indicates engine electronic control unit that the output torque of combustion engine is done corresponding the adjustment; And
Controller zone (CAN) bus, described engine electronic control unit and hybrid power control unit are realized communicating by letter each other by inserting the CAN bus.
Reasonable is in above-mentioned hybrid vehicle control system, further to comprise:
Insert the battery control unit of CAN bus, it is responsible for controlling the operation that discharges and recharges of battery pile;
Insert the motor control unit of CAN bus, it is connected between motor and the battery pile, is responsible for the operation of control motor.
Reasonablely be, in above-mentioned hybrid vehicle control system, described engine electronic control unit links to each other with the electronic accelerator pedal sensor, its detection signal according to the electronic accelerator pedal sensor is determined the torque demand amount of chaufeur and is delivered to the hybrid power control unit by the CAN bus, and the hybrid power control unit is determined the allocation proportion of torque demand amount between combustion engine and motor of chaufeur.
Reasonable is that in above-mentioned hybrid vehicle control system, the hybrid power control unit is achieved as follows operation through CAN bus indication engine electronic control unit:
A) stop internal combustion engine operation;
B) throttle gate of controlling combustion engine when engine shutdown;
C) injection of termination fuel injector;
D) heating of control exhaust gas oxygensensor;
E) idling speed of controlling combustion engine;
F) air-fuel ratio of setting combustion engine;
G) adjust the internal-combustion torque storage level;
H) the indication combustion engine is reset automatically.
Reasonable is that in above-mentioned hybrid vehicle control system, the hybrid power control unit compensates through the generated output of CAN bus indication engine electronic control unit to motor.
Reasonablely be, in above-mentioned hybrid vehicle control system, described CAN bus transfer rate is 500Kbit/s, and data frame format meets the CAN2.0A agreement, and Refresh Data at interval value be 2ms, 10ms and 20ms one of them.
Reasonablely be, in above-mentioned hybrid vehicle control system, engine electronic control unit sends first and second messages to the hybrid power control unit that inserts the CAN bus, wherein, first message comprises chaufeur requesting state information and combustion engine status information, described chaufeur requesting state information comprises ignition key, the location status of brake switch and air conditioning switch, described combustion engine status information comprises the electronic throttle position, the diagnostic result of various sensors and actr, second message comprise the torque demand amount of chaufeur, the torque peak of the current permission of combustion engine, the torque peak storage level of the current permission of combustion engine; The hybrid power control unit sends the 3rd message to the engine electronic control unit that inserts the CAN bus, it comprise output torque adjustment instruction, hybrid vehicle mode of operation, needs the torque reserve amount and to air/fuel ratiometric intervention amount.
Another object of the present invention provides a kind of control method of the hybrid vehicle based on above-mentioned control system, and this control method can be improved the ride comfort of vehicle, and improves the effective rate of utilization of outputting power.
This purpose of the present invention is achieved through the following technical solutions:
A kind of control method of hybrid vehicle, described control method adopt above-mentioned control system to realize controllable function, and by the operation according to following manner controlling combustion engine and motor of hybrid power control unit or engine electronic control unit:
When following at least one condition occurring, close combustion engine:
1a) when the speed of a motor vehicle during less than a certain speed;
When 1b) the vehicle low speed that is in band brake slides;
When 1c) vehicle keeps neutral gear to reach specified time;
When 1d) internal-combustion engine rotational speed is less than setting value,
When following at least one condition occurring, forbid auto shut down:
When 2a) vehicle is hung into " 1 " shelves or " R " retaining;
2b) combustion engine is not finished warming-up process as yet;
2c) the battery charge percentum (SOC) of battery pile is crossed when hanging down,
Starting apparatus combustion engine at once when following arbitrary condition satisfies:
3a) chaufeur gear shift and be not free wheel gear shift;
3b) speed of a motor vehicle sharply descends in the brake pedal process of unclamping;
3c) acceleration pedal is operated;
3d) during neutral gear SOC less than setting value,
When acceleration pedal is discharged and brake pedal when not stepping on fully, carry out the portion of energy regenerative braking operation, and when brake pedal is operated, carry out comprehensive regenerative braking operation,
When being in to cruise, vehicle travels or Parking state and SOC need power less than specified value or 12V system the time, the indication motor generating,
When combustion engine can't satisfy the chaufeur power demand, indication motor was according to quickening power-assisted with the setting relation of electronic accelerator pedal position.
In control system of the present invention, manage the horsepower output of driving engine by adopting electronic throttle, therefore prototype in engine electronic control unit (ECU) and the regular-grade gasoline driving engine can make full use of original control system compatible mutually on the hardware and compatible substantially on software.In addition, the present invention realizes the specific function of hybrid vehicle with the hybrid power control unit that is independent of engine electronic control unit, pass through the total wire joint of CAN between the control unit, and that the communication between each control unit is all adopted is general, open data-interface, therefore mentality of designing is clear, is convenient to upgrade maintenance in the future.Control method of the present invention is based on above-mentioned control system, except that possessing above-mentioned advantage, also by definition be used for starting, stop, the control policy of process combustion engine such as generating, power-assisted and motor, for the control of engine system provides rich functions.
Description of drawings
By below in conjunction with the description of accompanying drawing to preferred embodiment of the present invention, can further understand purpose of the present invention, feature and advantage, wherein:
Fig. 1 is a kind of system construction drawing of hybrid vehicle, the control system according to a preferred embodiment of the present invention that this hybrid vehicle adopts.
The specific embodiment
Common engine management system mainly comprises electronic control unit, air flow meter, throttle gate, intake pressure temperature sensor, electric-controlled fuel injector, detonation sensor, electronic accelerator pedal etc.Unlike the prior art be to adopt electronic throttle to replace mechanical throttle gate among the present invention.In the present invention, adopt electronic throttle to have the meaning of particular importance: for the torque demand of chaufeur (can by the location definition of electronic accelerator pedal), by regulating the aperture of electronic throttle, can adjust the output torque of combustion engine, therefore guaranteeing that combustion engine and motor output torque sum equal under the prerequisite of torque demand of chaufeur, between combustion engine and motor, realize any distribution and the combination of moment of torsion, thereby provide possibility for the realization of various power control strategies.In addition, in order to make full use of existing control system, the present invention realizes the special controllable function of hybrid vehicle and other control unit that controllable function is separated and usefulness is independent of engine electronic control unit on hardware of ordinary internal combustion engine.
According to above-mentioned thinking, hybrid vehicle control system of the present invention links together by controller zone (CAN) bus other control unit with engine electronic control unit and the control operation of realization hybrid power, the control of combustion engine is realized by engine electronic control unit, output torque distribution and combination etc. are realized by other control unit, when the operation of one unit relates to the operation of other unit, operation will be realized by other unit through the CAN bus in this unit.For example, when needs are adjusted the output torque of combustion engine, the hybrid power control unit sends instruction through the CAN bus to engine electronic control unit, and engine electronic control unit is adjusted the output torque of combustion engine then according to this instruction by the aperture of regulating electronic throttle.
Below by accompanying drawing preferred embodiment of the present invention is described.
As shown in Figure 1, the hybrid vehicle system comprises engine electronic control unit 1, electronic throttle 2, electronic accelerator pedal sensor 3, multi-energy management unit 4, battery control unit 5, motor control unit 6, CAN bus 7, combustion engine (ICE) 8, starter generator (ISG) 9, battery pile 10 and change speed gear box 11, wherein engine electronic control unit 1, electronic throttle 2 and electronic accelerator pedal sensor 3 etc. belong to common engine management system, with multi-energy management unit 4, the control unit that realizations such as battery control unit 5 and motor control unit 6 relate to other operation of hybrid power adds the control system that common engine management system can make up hybrid vehicle.
In Fig. 1, engine electronic control unit 1, multi-energy management unit 4, battery control unit 5 and motor control unit 6 all are connected on the CAN bus 7, engine electronic control unit 1 links to each other with electronic throttle 2, therefore can control the aperture of electronic throttle 2 according to the instruction that multi-energy management unit 4 is carried through CAN bus 7, it also links to each other with electronic accelerator pedal sensor 3, therefore can receive the pedal position detection signal of electronic accelerator pedal sensor 3, determine the torque demand amount of chaufeur and the torque demand amount is delivered to multi-energy management unit 4 through CAN bus 7, in addition, therefore engine electronic control unit 1 links to each other with combustion engine 8, can gather the status information of combustion engine 8 and the running state of controlling combustion engine in view of the above.Multi-energy management unit 4 can be determined the output torque of combustion engine and motor according to following various control policies according to the torque demand amount.Battery control unit 5 links to each other with battery pile 10, is responsible for the operation that discharges and recharges of control battery pile 10.Motor control unit 6 is connected between ISG9 and the battery pile 10, is responsible for the operation of control ISG9.
The unidirectional ISG9 that exports to of the power of ICE8, and the power of ISG9 can unidirectionally export change speed gear box and motor control unit to and can extract electric energy from motor control unit 6.Particularly, motor control unit 6 can make ISG9 rotate under the driving of battery pile 10 according to certain control policy, perhaps makes ISG9 that the mechanical energy of ICE8 and automobile kinetic energy are converted to electric energy and charges into battery pile 10.
In the hybrid vehicle control system of present embodiment, other control unit (for example multi-energy management unit 4, battery control unit 5 and motor control unit 6) can be achieved as follows operation through CAN bus 7 indication engine electronic control units:
A) stop internal combustion engine operation;
B) throttle gate of controlling combustion engine when engine shutdown;
C) injection of termination fuel injector;
D) heating of control exhaust gas oxygensensor;
E) idling speed of controlling combustion engine;
F) air-fuel ratio of setting combustion engine;
G) set the internal-combustion torque storage level;
H) the indication combustion engine is reset automatically.
In addition, other control unit can indicate the generated output of 1 pair of motor of engine electronic control unit to compensate through the CAN bus.
Be to guarantee of the basic demand of hybrid vehicle system, the real-time and the accuracy of data when engine electronic control unit must guarantee by the CAN bus communication with the control unit of realizing relating to other operation of hybrid power to performances such as driving, discharging, fuel economy.On the other hand, in view of present technical merit and industrialized object cost, can only adopt the communication bus of twisted-pair feeder form.
For this reason, in preferred embodiment of the present invention, the CAN bus protocol and the data format that adopt have following feature: bus transfer rate is 500Kbit/s, and data frame format meets the CAN2.0A agreement, and Refresh Data at interval value be 2ms, 10ms and 20ms one of them.
In addition, preferred embodiment of the present invention has also defined the communication data interface between engine electronic control unit 1 and other control unit (comprising multi-energy management unit 4, battery control unit 5 and motor control unit 6 etc.).For example, engine electronic control unit 1 sends first and second messages to the hybrid power control unit that inserts the CAN bus, wherein, first message comprises chaufeur requesting state information and combustion engine status information, described chaufeur requesting state information comprises ignition key, the location status of brake switch and air conditioning switch, described combustion engine status information comprises the electronic throttle position, the diagnostic result of various sensors and actr, second message comprise the torque demand amount of chaufeur, the maximum power of the current permission of combustion engine, the torque peak storage level of the current permission of combustion engine; Other control unit (comprising multi-energy management unit 4, battery control unit 5 and motor control unit 6 etc.) sends the 3rd message to the engine electronic control unit that inserts the CAN bus, it comprise output torque adjustment instruction, hybrid vehicle mode of operation, needs the torque reserve amount and to air/fuel ratiometric intervention amount.
Hybrid vehicle control method based on above-mentioned control system is below described.In the method, hybrid power control unit or engine electronic control unit are according to the operation of following policy control combustion engine and motor:
When following at least one condition occurring, close combustion engine:
1a) when the speed of a motor vehicle during less than a certain speed;
When 1b) the vehicle low speed that is in band brake slides;
When 1c) vehicle keeps neutral gear to reach specified time;
When 1d) internal-combustion engine rotational speed is less than setting value,
When following at least one condition occurring, forbid auto shut down:
When 2a) vehicle is hung into " 1 " shelves or " R " retaining;
2b) combustion engine is not finished warming-up process as yet;
2c) the battery charge percentum (SOC) of battery pile is crossed when hanging down,
Starting apparatus combustion engine at once when following arbitrary condition satisfies:
3a) chaufeur gear shift and be not free wheel gear shift;
3b) speed of a motor vehicle sharply descends in the brake pedal process of unclamping;
3c) acceleration pedal is operated;
3d) during neutral gear SOC less than setting value,
When acceleration pedal is discharged and brake pedal when not stepping on fully, carry out the portion of energy regenerative braking operation, and when brake pedal is operated, carry out comprehensive regenerative braking operation,
When being in to cruise, vehicle travels or Parking state and SOC need power less than specified value or 12V system the time, the indication motor generating,
When combustion engine can't satisfy the chaufeur power demand, indication motor was according to quickening power-assisted with the setting relation of electronic accelerator pedal position.
Though the description of the foregoing description is an example with ISG type HEV, it should be understood that the present invention also can be applicable to other various forms of hybrid vehicles.

Claims (8)

1, a kind of hybrid vehicle control system, the power of described hybrid vehicle is provided by combustion engine and motor, it is characterized in that, comprising:
Engine electronic control unit, its aperture by the control electronic throttle is adjusted the output torque of combustion engine;
The hybrid power control unit, it is determined the output torque of combustion engine and motor and indicates engine electronic control unit that the output torque of combustion engine is done corresponding the adjustment; And
Controller zone (CAN) bus, described engine electronic control unit and hybrid power control unit are realized communicating by letter each other by inserting the CAN bus.
2, hybrid vehicle control system as claimed in claim 1 is characterized in that, further comprises:
Insert the battery control unit of CAN bus, it is responsible for controlling the operation that discharges and recharges of battery pile; And
Insert the motor control unit of CAN bus, it is connected between motor and the battery pile, is responsible for the operation of control motor.
3, hybrid vehicle control system as claimed in claim 1 or 2, it is characterized in that, described engine electronic control unit links to each other with the electronic accelerator pedal sensor, its detection signal according to the electronic accelerator pedal sensor is determined the torque demand amount of chaufeur and is delivered to the hybrid power control unit by the CAN bus, and the hybrid power control unit is determined the allocation proportion of torque demand amount between combustion engine and motor of chaufeur.
4, hybrid vehicle control system as claimed in claim 3 is characterized in that, the hybrid power control unit is achieved as follows operation through CAN bus indication engine electronic control unit:
A) stop internal combustion engine operation;
B) throttle gate of controlling combustion engine when engine shutdown;
C) injection of termination fuel injector;
D) heating of control exhaust gas oxygensensor;
E) idling speed of controlling combustion engine;
F) air-fuel ratio of setting combustion engine;
G) adjust the internal-combustion torque storage level;
H) the indication combustion engine is reset automatically.
5, hybrid vehicle control system as claimed in claim 4 is characterized in that, the hybrid power control unit compensates through the generated output of CAN bus indication engine electronic control unit to motor.
6, hybrid vehicle control system as claimed in claim 5 is characterized in that, described CAN bus transfer rate is 500Kbit/s, and data frame format meets the CAN2.0A agreement, and Refresh Data at interval value be 2ms, 10ms and 20ms one of them.
7, hybrid vehicle control system as claimed in claim 6, it is characterized in that, engine electronic control unit sends first and second messages to the hybrid power control unit that inserts the CAN bus, wherein, first message comprises chaufeur requesting state information and combustion engine status information, described chaufeur requesting state information comprises ignition key, the location status of brake switch and air conditioning switch, described combustion engine status information comprises the electronic throttle position, the diagnostic result of various sensors and actr, second message comprise the torque demand amount of chaufeur, the torque peak of the current permission of combustion engine, the torque peak storage level of the current permission of combustion engine; The hybrid power control unit sends the 3rd message to the engine electronic control unit that inserts the CAN bus, it comprise output torque adjustment instruction, hybrid vehicle mode of operation, needs the torque reserve amount and to air/fuel ratiometric intervention amount.
8, a kind of control method of hybrid vehicle, it is characterized in that, described control method adopts as any described control system realization controllable function in the claim 1~7, and by the operation according to following manner controlling combustion engine and motor of hybrid power control unit or engine electronic control unit:
When following at least one condition occurring, close combustion engine:
1a) when the speed of a motor vehicle during less than a certain speed;
When 1b) the vehicle low speed that is in band brake slides;
When 1c) vehicle keeps neutral gear to reach specified time;
When 1d) internal-combustion engine rotational speed is less than setting value,
When following at least one condition occurring, forbid auto shut down:
When 2a) vehicle is hung into " 1 " shelves or " R " retaining;
2b) combustion engine is not finished warming-up process as yet;
2c) the battery charge percentum (SOC) of battery pile is crossed when hanging down,
Starting apparatus combustion engine at once when following arbitrary condition satisfies:
3a) chaufeur gear shift and be not free wheel gear shift;
3b) speed of a motor vehicle sharply descends in the brake pedal process of unclamping;
3c) acceleration pedal is operated;
3d) during neutral gear SOC less than setting value,
When acceleration pedal is discharged and brake pedal when not stepping on fully, carry out the portion of energy regenerative braking operation, and when brake pedal is operated, carry out comprehensive regenerative braking operation,
When being in to cruise, vehicle travels or Parking state and SOC need power less than specified value or 12V system the time, the indication motor generating,
When combustion engine can't satisfy the chaufeur power demand, indication motor was according to quickening power-assisted with the setting relation of electronic accelerator pedal position.
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