CN101386303A - Motor drive control method for hybrid power automobile - Google Patents

Motor drive control method for hybrid power automobile Download PDF

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Publication number
CN101386303A
CN101386303A CNA2007100769714A CN200710076971A CN101386303A CN 101386303 A CN101386303 A CN 101386303A CN A2007100769714 A CNA2007100769714 A CN A2007100769714A CN 200710076971 A CN200710076971 A CN 200710076971A CN 101386303 A CN101386303 A CN 101386303A
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China
Prior art keywords
torque
motor
engine
soc
control method
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Pending
Application number
CNA2007100769714A
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Chinese (zh)
Inventor
黄敬
邹海滨
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Chery Automobile Co Ltd
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SAIC Chery Automobile Co Ltd
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Priority to CNA2007100769714A priority Critical patent/CN101386303A/en
Publication of CN101386303A publication Critical patent/CN101386303A/en
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    • 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
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T10/72Electric energy management in electromobility

Abstract

The present invention relates to a motor drive control method of a hybrid-electric vehicle. The method comprises the steps as follows: firstly, stage of change value (SOC) of a storage battery is detected at real time, the relation between the SOC and threshold values X and Y is compared and judged and the motor torque and the engine torque are regulated accordingly, wherein, X is less than Y, the torque required by the vehicle is equal to the torque required by an engine minus the torque for the motor to generate electricity; secondly, motor torque and engine torque instructions are output. A hybrid-electric controller monitors the SOC and judges different conditions in time to search chance to generate electricity and process auxiliary drive at any moment, so the present invention solves the technical problem that the existing motor drive control method of the hybrid-electric vehicle can not provide the vehicle with driving force according to the SOC, thus improving the performance of the vehicle, reducing fuel consumption and emission.

Description

A kind of motor drive control method for hybrid power automobile
Technical field
The present invention relates to the drive controlling method of motor of hybrid power automobile.
Background technology
Since the nineties, Japan, the U.S., each big car company of Europe begin to develop the mixed motivity type automobile one after another.Since Japanese Toyota Company took the lead in releasing hybrid power car in 1997, each big car company comprised that Honda, general, Ford, D-C and french citroen etc. all release or developed production car or notion sample car.The expert thinks in following 10 years, has 40% automobile and all will adopt the hybrid power technology, and hybrid vehicle has huge development prospect.High-power hybrid powder motor in the hybrid power system is the critical component of hybrid power system.Existing motor drive control method for hybrid power automobile can not come for vehicle provides propulsive effort according to the state-of-charge value SOC of storage battery, thereby improves the performance of vehicle, reduces oil consumption, emission abatement.
Summary of the invention
The present invention proposes a kind of motor drive control method for hybrid power automobile, to solve that existing motor drive control method for hybrid power automobile can not come according to the state-of-charge value SOC of storage battery is that vehicle provides propulsive effort, thereby improve the performance of vehicle, reduce oil consumption, the technical matters of emission abatement.
In order to solve above technical matters, the technical scheme that the present invention takes is:
A kind of motor drive control method for hybrid power automobile is characterized in that, may further comprise the steps:
(1) detect the state-of-charge value SOC of storage battery in real time, relatively judge state-of-charge value SOC and threshold X when storage battery, the relation of Y, corresponding Motor torque and the engine torque adjusted, X<Y wherein, car load moment of torsion=engine torque+Motor torque:
(1) when SOC<X, with Motor torque zero setting,
(2) when X<SOC<Y, whether checking system satisfies can the assistive drive state,
If do not satisfy, with Motor torque zero setting,
If satisfy, judge further whether driving engine is in start-up course,
If be in start-up course, make motor send torque peak,
If be not in start-up course, increase the output torque of motor, reduce the output torque of driving engine.
(3) as SOC〉during Y, whether checking system satisfies can the assistive drive state,
If do not satisfy, with Motor torque zero setting,
If satisfy, enter the assistive drive state of laying particular stress on engine efficiency, readjust the distribution the motivation moment of torsion and be operated in the higher zone of efficiency ratio to it;
(2) output motor moment of torsion and engine torque command.
Also continue to adjust after described step () is finished and obtain engine torque and Motor torque carries out smoothing processing.
Described checking system whether satisfy can the assistive drive state method be: a kind of below occurring in any situation is that can not satisfy can the assistive drive state:
A) driving engine is in non-operating state or driving engine at idling mode,
B) power-transfer clutch is not in closure state,
C) power-transfer clutch is in neutral,
D) brake pedal is operated,
When e) temperature of non-start-up course medium power battery is higher than a certain threshold value,
When f) temperature of inverter is higher than a certain threshold value in the non-start-up course,
When g) non-start-up course medium power battery and motor disconnect.
After described step () was finished and obtained Motor torque and engine torque, also with engine torque and its minimum threshold relatively, when engine torque during less than its minimum threshold, engine torque was got its minimum threshold, and Motor torque also adjusts accordingly.
After described step () was finished and obtained Motor torque and engine torque, also with Motor torque and its minimum threshold relatively, when Motor torque during less than its minimum threshold, Motor torque was got its minimum threshold.Engine torque also adjusts accordingly.
After having adopted technique scheme, because hybrid controller is monitored the state-of-charge value SOC of storage battery, different situations is in time judged the chance that to generate electricity and carry out assistive drive to find at any time, having solved existing motor drive control method for hybrid power automobile can not come according to the state-of-charge value SOC of storage battery to improve the performance of vehicle for vehicle provides propulsive effort, reduce oil consumption, the technical matters of emission abatement.In the middle of operational process, hybrid vehicle can convert a part of dump energy to electric energy by hybrid powder motor, stores in the closed-center systems such as storage battery.Hybrid controller can be controlled motor and utilize this a part of electric energy that propulsive effort is provided in due course, and the dump energy that this can make full use of in the vehicle operating process on the one hand reduces fuel oil consumption; The tractive performance higher than original driving engine can be provided on the other hand; The more important thing is, can allow engine operation in the higher zone of efficiency ratio.When accumulator electric-quantity is many, can allow engine operation in low moment of torsion, high efficiency zone, the moment of torsion that this moment, driving engine provided is lower than the required moment of torsion of vehicle, and hybrid powder motor will be supplied the required moment of torsion of vehicle; When the electricity ratio of storage battery is less, can allow engine operation in high pulling torque, high efficiency zone, it is required that the moment of torsion that driving engine provides surpasses vehicle, and unnecessary moment of torsion can drive hybrid powder motor and generate electricity, and stores energy in the storage battery.As follows circulation repeatedly.Can significantly improve the fuel economy of car load like this, improve discharging.
Description of drawings
Fig. 1 is the driver train connection diagram of the hybrid vehicle that the present invention relates to.
Fig. 2 is that the control system of the hybrid vehicle that the present invention relates to is electrically connected scheme drawing.
Fig. 3 is the signal flow diagram that the present invention realizes electricity generate function.
Fig. 4 realizes diagram of circuit of the present invention.
The specific embodiment
Motor and driving engine among the present invention are illustrated in figure 1 as coaxial arrangement, one section of motor links to each other with engine crankshaft, the other end links to each other with change speed gear box by power-transfer clutch, and motor is that electric generator/electric motor is incorporate, and its mode of operation is controlled by hybrid controller and electric machine controller.The signal flow that is electrically connected and realizes electricity generate function of control system is shown in Fig. 2,3.Control method of the present invention may further comprise the steps as shown in Figure 4:
(1) detect the state-of-charge value SOC of storage battery in real time, relatively judge state-of-charge value SOC and threshold X when storage battery, the relation of Y, corresponding Motor torque and the engine torque adjusted, X<Y wherein, car load moment of torsion=engine torque+Motor torque:
(1) when SOC<X, with Motor torque zero setting,
(2) when X<SOC<Y, whether checking system satisfies can the assistive drive state,
If do not satisfy, with Motor torque zero setting,
If satisfy, judge further whether driving engine is in start-up course,
If be in start-up course, make motor send torque peak,
If be not in start-up course, increase the output torque of motor, reduce the output torque of driving engine.
(3) as SOC〉during Y, whether checking system satisfies can the assistive drive state,
If do not satisfy, with Motor torque zero setting,
If satisfy, enter the assistive drive state of laying particular stress on engine efficiency, readjust the distribution the motivation moment of torsion and be operated in the higher zone of efficiency ratio to it;
(2) obtain Motor torque and engine torque after, also with engine torque and Motor torque and separately minimum threshold relatively, when engine torque during less than minimum threshold separately, engine torque is got its minimum threshold, Motor torque also adjusts accordingly; When Motor torque during less than its minimum threshold, Motor torque is got its minimum threshold.Engine torque also adjusts accordingly;
(3) adjustment is obtained engine torque and Motor torque and carry out smoothing processing.
(4) output motor moment of torsion and engine torque command.
Wherein checking system whether satisfy can the assistive drive state method be: a kind of below occurring in any situation is that can not satisfy can the assistive drive state:
A) driving engine is in non-operating state or driving engine at idling mode,
B) power-transfer clutch is not in closure state,
C) power-transfer clutch is in neutral,
D) brake pedal is operated,
When e) temperature of non-start-up course medium power battery is higher than a certain threshold value,
When f) temperature of inverter is higher than a certain threshold value in the non-start-up course,
When g) non-start-up course medium power battery and motor disconnect.
Specific explanations is as follows:
1. the assistive drive of motor can be divided into: start, lay particular stress on the assistive drive of engine efficiency, lay particular stress on the assistive drive of performance.The assistive drive of motor can make full use of the dump energy of collecting in the vehicle ' process, and can adjust the efficient of the operating condition of driving engine with the raising driving engine, thereby can improve the performance fuel economy of vehicle.
2. having only when satisfying following condition just allows motor to carry out the assistive drive of non-start-up course:
Have only driving engine to be in running state and driving engine is not at idling mode, just allow assistive drive
Have only power-transfer clutch to be in closure state, just allow to carry out assistive drive
Have only power-transfer clutch not in neutral, just assistive drive is carried out in operation
Have only brake pedal not to be operated, just allow to carry out assistive drive
3. do not allow to carry out the assistive drive of non-start-up course under the following situation:
When the temperature of electrokinetic cell is higher than a certain threshold value, forbid carrying out assistive drive
When the temperature of inverter is higher than a certain threshold value, forbid carrying out assistive drive
When electrokinetic cell and motor disconnection, do not allow to carry out assistive drive
4. when conventional truck started, motor was that driving engine is driven a speed that is lower than idling speed, accelerates to idling speed behind the engine ignition voluntarily.In the hybrid vehicle start-up course, hybrid powder motor can provide propulsive effort that driving engine is accelerated to rotating speed of target always, improves startability.During assistant starting, motor will be operated under the max. output torque operating mode of self.
5. when having only SOC when storage battery, just allow hybrid powder motor to carry out assistive drive greater than a certain threshold X.
6. the SOC that works as battery is less than a certain threshold value Y, and promptly X<SOC<Y can lay particular stress on the assistive drive of engine efficiency.Allow engine operation in the higher zone of efficiency ratio; Supply the required moment of torsion of vehicle ' with hybrid powder motor.The SOC of battery is big more in principle, and motor driving moment is also big more.
7. when battery SOC during, can lay particular stress on the assistive drive of vehicles dynamic performance greater than a certain threshold value Y.Pay the utmost attention to and use motor to drive, suitably increase the output torque of motor, reduce the output torque of driving engine.
8. hybrid controller is resolved throttle signal, calculates the needed moment of torsion of car load.Car load required torque, engine torque and Motor torque should satisfy following relation;
Car load moment of torsion=engine torque+Motor torque
Hybrid controller sends instruction to engine management system and electric machine controller respectively according to result of calculation and other some conditions, requires to provide separately certain moment of torsion.
9. before the torque control instruction of output driving engine, hybrid controller needs the minimum value of limiting engine moment of torsion, because the efficient of driving engine is also very low under the low excessively output torque operating mode.This can be higher than a certain threshold value and handle by the moment of torsion of driving engine is brought up to, and the driving torque of motor need adjust accordingly.
10. before the torque control instruction of output motor, hybrid controller need limit the minimum output torque of motor, and low excessively output torque also can make efficiency of motor very low.If the output torque of motor then should be by being set to this numerical value moment of torsion zero assistive drive of forbidding motor less than a certain threshold value.
11. before the output torque instruction, hybrid controller need carry out smoothly Motor torque and engine torque, avoids the step of moment of torsion to change, and prevents to have influence on the traveling comfort of car load and system is caused damage.

Claims (5)

1, a kind of motor drive control method for hybrid power automobile is characterized in that, may further comprise the steps:
(1) detect the state-of-charge value SOC of storage battery in real time, relatively judge state-of-charge value SOC and threshold X when storage battery, the relation of Y, corresponding Motor torque and the engine torque adjusted, X<Y wherein, car load moment of torsion=engine torque-Motor torque:
(1) when SOC<X, with Motor torque zero setting,
(2) when X<SOC<Y, whether checking system satisfies can the assistive drive state,
If do not satisfy, with Motor torque zero setting,
If satisfy, judge further whether driving engine is in start-up course,
If be in start-up course, make motor send torque peak,
If be not in start-up course, increase the output torque of motor, reduce the output torque of driving engine.
(3) as SOC〉during Y, whether checking system satisfies can the assistive drive state,
If do not satisfy, with Motor torque zero setting,
If satisfy, enter the assistive drive state of laying particular stress on engine efficiency, readjust the distribution the motivation moment of torsion and be operated in the higher zone of efficiency ratio to it;
(2) output motor moment of torsion and engine torque command.
2, motor drive control method for hybrid power automobile as claimed in claim 1 is characterized in that, also continue to adjust after described step () is finished to obtain engine torque and Motor torque carries out smoothing processing.
3, motor drive control method for hybrid power automobile as claimed in claim 1, it is characterized in that, described checking system whether satisfy can the assistive drive state method be: a kind of below occurring in any situation is that can not satisfy can the assistive drive state:
A) driving engine is in non-operating state or driving engine at idling mode,
B) power-transfer clutch is not in closure state,
C) power-transfer clutch is in neutral,
D) brake pedal is operated,
When e) temperature of non-start-up course medium power battery is higher than a certain threshold value,
When f) temperature of inverter is higher than a certain threshold value in the non-start-up course,
When g) non-start-up course medium power battery and motor disconnect.
4, motor drive control method for hybrid power automobile as claimed in claim 1, it is characterized in that, after described step () is finished and is obtained Motor torque and engine torque, also engine torque and its minimum threshold are compared, when engine torque during less than its minimum threshold, engine torque is got its minimum threshold, and Motor torque also adjusts accordingly.
5, motor drive control method for hybrid power automobile as claimed in claim 1, it is characterized in that, after described step () is finished and is obtained Motor torque and engine torque, also Motor torque and its minimum threshold are compared, when Motor torque during less than its minimum threshold, Motor torque is got its minimum threshold.Engine torque also adjusts accordingly.
CNA2007100769714A 2007-09-12 2007-09-12 Motor drive control method for hybrid power automobile Pending CN101386303A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101890957A (en) * 2010-05-22 2010-11-24 张洪延 Fuel/ electric hybrid multi-mode stepless speed change driving system control method
CN101648511B (en) * 2009-09-04 2012-11-28 奇瑞汽车股份有限公司 Control method of engine speed of hybrid car in generating state
CN103052781A (en) * 2010-08-23 2013-04-17 卡明斯公司 Hybrid power train rate control
US20130173100A1 (en) * 2011-12-29 2013-07-04 Kawasaki Jukogyo Kabushiki Kaisha Electric Vehicle
CN103640572A (en) * 2013-11-19 2014-03-19 江苏大学 Vehicle hybrid power drive system control method
CN103707883A (en) * 2013-12-17 2014-04-09 中联重科股份有限公司 Method, device and system for controlling auxiliary power unit of vehicle, and engineering machine
CN103991389A (en) * 2014-05-20 2014-08-20 中国科学院深圳先进技术研究院 Method and device for managing energy of hybrid power bus with fuel cell
CN104071148A (en) * 2013-03-28 2014-10-01 比亚迪股份有限公司 Energy-saving control method for automobile, energy-saving control system and automobile
CN104176044A (en) * 2013-05-22 2014-12-03 上海汽车集团股份有限公司 Energy management method for hybrid vehicle in series state and hybrid vehicle
CN105270381A (en) * 2014-05-27 2016-01-27 深圳电擎科技有限公司 Control method and device for hybrid electric vehicle
CN108116271A (en) * 2017-12-27 2018-06-05 潍柴动力股份有限公司 A kind of electric system and its control method
CN110103854A (en) * 2019-04-04 2019-08-09 江西清华泰豪三波电机有限公司 A kind of hybrid vehicle electric control system
CN110329236A (en) * 2019-07-09 2019-10-15 北京汽车集团越野车有限公司 Automobile power control method, system and automobile
CN111267635A (en) * 2018-12-05 2020-06-12 比亚迪股份有限公司 Control method and device for torque of smooth motor
CN112477843A (en) * 2020-11-24 2021-03-12 上汽通用五菱汽车股份有限公司 Torque distribution method, system, device and storage medium for hybrid vehicle

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101648511B (en) * 2009-09-04 2012-11-28 奇瑞汽车股份有限公司 Control method of engine speed of hybrid car in generating state
CN101890957B (en) * 2010-05-22 2012-12-19 张洪延 Fuel/ electric hybrid multi-mode stepless speed change driving system control method
CN101890957A (en) * 2010-05-22 2010-11-24 张洪延 Fuel/ electric hybrid multi-mode stepless speed change driving system control method
CN103052781B (en) * 2010-08-23 2016-02-10 卡明斯公司 The speeds control of hybrid power system
CN103052781A (en) * 2010-08-23 2013-04-17 卡明斯公司 Hybrid power train rate control
US20130173100A1 (en) * 2011-12-29 2013-07-04 Kawasaki Jukogyo Kabushiki Kaisha Electric Vehicle
US8965609B2 (en) * 2011-12-29 2015-02-24 Kawasaki Jukogyo Kabushiki Kaisha Electric vehicle
CN104071148B (en) * 2013-03-28 2016-11-02 比亚迪股份有限公司 The energy-saving control method of automobile and energy-saving control system and automobile
CN104071148A (en) * 2013-03-28 2014-10-01 比亚迪股份有限公司 Energy-saving control method for automobile, energy-saving control system and automobile
CN104176044A (en) * 2013-05-22 2014-12-03 上海汽车集团股份有限公司 Energy management method for hybrid vehicle in series state and hybrid vehicle
CN103640572A (en) * 2013-11-19 2014-03-19 江苏大学 Vehicle hybrid power drive system control method
CN103707883A (en) * 2013-12-17 2014-04-09 中联重科股份有限公司 Method, device and system for controlling auxiliary power unit of vehicle, and engineering machine
CN103707883B (en) * 2013-12-17 2016-02-17 中联重科股份有限公司 The control method of vehicle assisted dynamic unit, equipment, system and construction machinery and equipment
CN103991389A (en) * 2014-05-20 2014-08-20 中国科学院深圳先进技术研究院 Method and device for managing energy of hybrid power bus with fuel cell
CN105270381A (en) * 2014-05-27 2016-01-27 深圳电擎科技有限公司 Control method and device for hybrid electric vehicle
CN105270381B (en) * 2014-05-27 2018-02-02 深圳电擎科技有限公司 The control method and device of hybrid vehicle
CN108116271A (en) * 2017-12-27 2018-06-05 潍柴动力股份有限公司 A kind of electric system and its control method
CN111267635A (en) * 2018-12-05 2020-06-12 比亚迪股份有限公司 Control method and device for torque of smooth motor
CN111267635B (en) * 2018-12-05 2021-09-21 比亚迪股份有限公司 Control method and device for torque of smooth motor
CN110103854A (en) * 2019-04-04 2019-08-09 江西清华泰豪三波电机有限公司 A kind of hybrid vehicle electric control system
CN110103854B (en) * 2019-04-04 2022-05-24 江西清华泰豪三波电机有限公司 Electrical control system of hybrid electric vehicle
CN110329236A (en) * 2019-07-09 2019-10-15 北京汽车集团越野车有限公司 Automobile power control method, system and automobile
CN112477843A (en) * 2020-11-24 2021-03-12 上汽通用五菱汽车股份有限公司 Torque distribution method, system, device and storage medium for hybrid vehicle
CN112477843B (en) * 2020-11-24 2022-09-06 上汽通用五菱汽车股份有限公司 Torque distribution method, system, device and storage medium for hybrid vehicle

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Application publication date: 20090318