CN1986304A - Mixed power automobile controlling method - Google Patents

Mixed power automobile controlling method Download PDF

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Publication number
CN1986304A
CN1986304A CNA2006100981845A CN200610098184A CN1986304A CN 1986304 A CN1986304 A CN 1986304A CN A2006100981845 A CNA2006100981845 A CN A2006100981845A CN 200610098184 A CN200610098184 A CN 200610098184A CN 1986304 A CN1986304 A CN 1986304A
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speed
motor
engine
idle stop
starting
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CNA2006100981845A
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李明军
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Chery Automobile Co Ltd
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Chery Automobile Co Ltd
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Priority to CNA2006100981845A priority Critical patent/CN1986304A/en
Publication of CN1986304A publication Critical patent/CN1986304A/en
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  • Hybrid Electric Vehicles (AREA)

Abstract

The mixed power automobile controlling method includes starting the large motor, decreasing the assistance of the motor gradually and supplying oil to the engine after the engine rotation speed reaches idle rotation speed so as to starting the engine fast, providing motor assistance after the throttle opening is greater than the lower limit of starting one and if SOC allows so as to improve the starting performance, adopting idle stop control to stop the engine and the motor, and matching the accelerating assistance control and cruise generating control so as to reduce exhaust and oil consumption and obtain excellent dynamic performance.

Description

A kind of control method of hybrid vehicle
Technical field
The present invention relates to the control technology of hybrid vehicle, specifically is exactly the control method of hybrid vehicle.
Background technology
At present, along with oil price is surging, energy shortage and environmental pollution increase the weight of, and human pay attention to day by day is to the protection of environment and the use effectively and reasonably of the energy.Therefore, hybrid vehicles efficient, energy-saving and environmental protection just become the development tendency of auto trade.Hybrid vehicle has the anti-emission carburetor advantage of battery-driven car concurrently because of it and the high-energy-density advantage of internal-combustion engines vehicle more and more receives publicity, and becomes unexpectedly one of new vehicle of research and development mutually.
Summary of the invention
Technical matters to be solved by this invention provides a kind of hybrid vehicle control method, be intended to improve the integrated of control, realize controlling neatly automatically the mode of operation of driving engine and motor, to reach fuel economy that improves driving engine and the discharging that reduces driving engine, obtain good dynamic property simultaneously.
For achieving the above object, the present invention has adopted following control method:
A, big electric motor starting control: enough at SOC, the electric system trouble free, ambient temperature is higher than under the uniform temperature situation, adopts big electric motor starting driving engine, and when engine speed reached idling speed, motor reduced to assist again gradually, and driving engine begins fuel feeding work;
B, starting aux. controls: when the speed of a motor vehicle is lower, rotating speed is also lower, and accelerator open degree greater than the auxiliary accelerator open degree of starting down in limited time, if SOC allows, then motor provides auxiliary;
C, idle stop control: when satisfying following condition simultaneously, driving engine enters auto idle speed shutdown/starting state: accelerator open degree and throttle opening are zero, engine coolant temperature is greater than the lower limit of carrying out idle stop, the brake vacuum degree is greater than the lower limit of carrying out idle stop, SOC is greater than the lower limit of carrying out idle stop, engine speed is lower than the lower limit rotating speed that cruises and slow down, the speed of a motor vehicle is lower than the higher limit of carrying out idle stop or the speed of a motor vehicle and is lower than another higher limit of carrying out idle stop and touches on the brake simultaneously, and power-transfer clutch separately or hang neutral gear;
D, acceleration aux. controls: during accelerating mode,, multiply by again respectively according to SOC and the definite auxiliary quantity coefficient of correction of acceleration/accel according to accelerator open degree retrieval motor auxiliary quantity.
E, regenerative brake control: machine operation is at generating state when the relieving throttle slides, at this moment, table look-up according to the speed of a motor vehicle and to determine the deceleration power generation torque, wherein, when the speed of a motor vehicle during less than certain value and ABS make the time spent power generation torque and equal zero, after determining the electric power generation moment of torsion, multiply by the regenerative electric power coefficient of correction of determining according to SOC again, obtain final power generation torque.
As shown from the above technical solution, enough at SOC, the electric system trouble free, ambient temperature is higher than under the situations such as uniform temperature, with big electric motor starting driving engine, when engine speed reached idling speed, motor reduced to assist again gradually as far as possible, driving engine begins fuel feeding work, like this, start the engine reduces oil consumption and discharging simultaneously rapidly, and, can reduce impact to system because motor auxiliary increases gradually and reduce; When the speed of a motor vehicle is lower, rotating speed is also lower, and accelerator open degree greater than the auxiliary accelerator open degree of starting down in limited time, if SOC allows, then motor provides auxiliary, to improve starting performance; Because driving engine is the oil consumption height when having slow speed of revolution, discharge big characteristics, so assisting of providing of motor can obviously be improved discharging and the oil consumption of driving engine when slow speed of revolution; At the idle stop state, driving engine quits work, and motor neither generates electricity also not auxiliary, so effectively emission abatement and oil consumption.
Summary of drawings
Fig. 1 is a control flow chart of judging the mode of operation of motor;
Fig. 2 quickens the control flow chart that auxiliary triggering is judged;
Fig. 3 is the control flow chart of accelerating mode;
Fig. 4 tables look-up according to accelerator open degree to ask the scheme drawing of motor auxiliary quantity;
Fig. 5 tables look-up according to SOC to ask the scheme drawing of the auxiliary coefficient of correction Ksoc of motor;
Fig. 6 tables look-up according to acceleration/accel to ask the scheme drawing of the auxiliary coefficient of correction Kacc of motor.
The specific embodiment
Hybrid power control method of the present invention is in order to realize big electric motor starting function, starting additional function function, idle stop function, to quicken basic function such as additional function, regenerative brake function and the electricity generate function that cruises, below describing concrete control method in detail.
Big electric motor starting control: enough at SOC, the electric system trouble free, ambient temperature is higher than under the situation such as uniform temperature, as far as possible with big electric motor starting driving engine.When engine speed reached idling speed, motor reduced to assist again gradually, and driving engine begins fuel feeding work.Like this, start the engine reduces oil consumption and discharging simultaneously rapidly.And, can reduce impact to system because motor auxiliary increases gradually and reduce.SOC-state of charg, the He electricity condition of battery, what of battery dump energy are the number between 0~100% be used to represent.
The starting aux. controls: when the speed of a motor vehicle is lower, rotating speed is also lower, and accelerator open degree greater than the auxiliary accelerator open degree of starting down in limited time, if SOC allows, then motor provides auxiliary, to improve starting performance.
When starting is auxiliary, search auxiliary quantity according to accelerator open degree and rotating speed, multiply by the auxiliary quantity coefficient of determining according to SOC again, auxiliary computing value obtains starting to walk.Motor is started from scratch progressively increases auxiliary quantity up to equaling auxiliary computing value.When the speed of a motor vehicle or rotating speed increase to a certain value, reduce auxiliary quantity gradually up to equaling 0.
Because driving engine is the oil consumption height when having slow speed of revolution, discharge big characteristics, so assisting of providing of motor can obviously be improved discharging and the oil consumption of driving engine when slow speed of revolution.
Idle stop control: when satisfying following condition simultaneously; driving engine enters auto idle speed shutdown/starting state: accelerator open degree and throttle opening are zero; engine coolant temperature is greater than the lower limit of carrying out the idle stop function; the brake vacuum degree is greater than the lower limit of carrying out the idle stop function; SOC is greater than the lower limit of carrying out the idle stop function; engine speed is lower than the lower limit rotating speed that cruises and slow down; the speed of a motor vehicle is lower than the higher limit of carrying out the idle stop function (perhaps the speed of a motor vehicle be lower than another higher limit of carrying out the idle stop function touch on the brake simultaneously), and power-transfer clutch separately or hang neutral gear.At the idle stop state, driving engine quits work, and motor neither generates electricity also not auxiliary.
When satisfying following condition, withdraw from the idle stop state, the rapid again start the engine of big motor:
A, be reduced to before 0,, then withdraw from the idle stop state, enter starting state if degree of vacuum is not enough or gearing in the speed of a motor vehicle;
B, be reduced to after 0,, enter starting state if gearing in or step on the accelerator then withdraw from the idle stop state in the speed of a motor vehicle.
The startup of idle stop also is to use big electric motor starting, and driving engine is started working when rotating speed reaches certain value, and motor stops to assist when rotating speed reaches certain value.
Quicken aux. controls: the characteristics of accelerating mode are that the variable quantity of accelerator open degree is big or accelerator open degree is bigger, have surpassed a predetermined threshold values (as the variable quantity of accelerator open degree greater than δ A%, or accelerator open degree is greater than B%), and just demand torque is bigger.At this moment, if SOC allows, motor will be assisted.When throttle wide travelled, demand torque was bigger, and motor will provide extra auxiliary quantity.The auxiliary quantity of motor can be tabled look-up definite, and multiply by the auxiliary quantity coefficient of correction of determining according to SOC, and this coefficient is a numerical value between 0 to 1 of determining according to the SOC size, and be a conditional value non-cutting time.Auxiliary quantity increases gradually and reduces, in order to avoid driving system is impacted.When acceleration/accel during greater than certain value, motor provides the acceleration power-assisted.At first, multiply by again respectively according to SOC and the definite auxiliary quantity coefficient of correction of acceleration/accel according to accelerator open degree retrieval motor auxiliary quantity.When accelerator open degree no longer changed, Motor torque began to reduce gradually, up to being zero.
Regenerative brake control: machine operation is at generating state when the relieving throttle slides.This moment, power generation torque was smaller, and is too fast to prevent that the speed of a motor vehicle from descending.And multiply by the regenerative electric power coefficient of correction of determining according to SOC.When only being the aperture that reduces Das Gaspedal, and when not being reduced to zero, motor does not generate electricity.When slowing down when touching on the brake, the electric power generation recuperated energy.At this moment, table look-up according to the speed of a motor vehicle and determine the deceleration power generation torque.Wherein, when the speed of a motor vehicle during less than certain value and ABS make the time spent power generation torque and equal zero.After determining the electric power generation moment of torsion, multiply by the regenerative electric power coefficient of correction of determining according to SOC again, obtain final power generation torque.
The Generation Control of cruising: the two kinds of situations of having cruised herein, first kind is that this moment, accelerator open degree was zero by the cruising of cruise control control, and throttle opening is non-vanishing, and the speed of a motor vehicle is constant; Second kind of situation is by cruising that the driver controls, and this moment, accelerator open degree and throttle opening were all non-vanishing, and it is constant substantially that the driver controls accelerator open degree, and it is constant that the speed of a motor vehicle keeps substantially.
At cruising condition, electric power generation is determined the power generation torque that cruises to battery charge according to engine speed when SOC is lower than certain value, and multiply by the generating coefficient of determining according to SOC that cruises.Under first kind of cruising condition, heighten the aperture of engine air throttle automatically according to engine loading, improve the output torque of driving engine by cruise control; Under second kind of cruising condition, send the engine torque increase according to the electric power generation moment of torsion and order EMS, heighten the engine air throttle aperture, increase engine output torque.The output torque that driving engine increases is used for generating electricity.When determining that electric power generation moment of torsion and driving engine increase moment of torsion, should make engine operation in both economical zone as far as possible.
Control flow shown in Figure 1 is to judge the mode of operation of motor, at first judges whether to start with key, if, entering big electric motor starting decision procedure, judgement is to start with big electric motor starting or with little starter motor.Enter the startup operating mode after judging end, carry out the work of start the engine.
If current key of no use starts, judge then whether the idle stop determination flag is 1,
If be 1, show to be in the idle stop state at present whether then enter idle stop and start decision procedure, judging needs to withdraw from idle stop pattern start the engine.After judging end, be 1, show and to withdraw from the idle stop pattern, then enter the startup operating mode if idle stop starts determination flag.If it is not 1 that idle stop starts determination flag, then show still to be in the idle stop pattern, enter the idle stop operating mode.
If the idle stop determination flag is not 1, show not in the idle stop operating mode continue to judge whether be in neutral at present.If be in neutral, then enter the idle stop decision procedure, judge whether be in idle stop, if then enter the idle stop operating mode.If not, then enter idling operation.
If not neutral, then judge whether complete shut-down of throttle.If the throttle complete shut-down judges then whether the sign 1 that cruises is 1, if 1, cruising condition then entered.If not 1, judge then whether the speed of a motor vehicle equals zero.If the speed of a motor vehicle is zero, then judge to be in idle stop state or idling mode, if the speed of a motor vehicle is non-vanishing, judge then whether engine speed is lower than to cruise/the lower limit rotating speed of ways of deceleration.If be lower than, then judge to be in idle stop state or idling mode, if be not less than, then enter decelerating mode.
If throttle is complete shut-down not, then enter starting auxiliary triggering decision procedure.When the starting auxiliary judgement is masked as 1, enters the starting operating mode, otherwise continue to enter the auxiliary judgement program of quickening.If quicken auxiliary judgement sign=1, then enter accelerating mode, otherwise continue to judge whether accelerator open degree is constant.If accelerator open degree is constant, the determination flag 2 of then will cruising puts 1, enters cruising condition.Otherwise the determination flag of will cruising 2 puts 0, enters decelerating mode.
Control flow shown in Figure 2 judges for quickening auxiliary triggering, when the variable quantity of accelerator open degree greater than zero the time, quicken the auxiliary judgement sign and be changed to 1, when the variable quantity of accelerator open degree is not more than zero, continue to judge that whether speed of a motor vehicle acceleration/accel is greater than zero.When speed of a motor vehicle acceleration/accel greater than zero the time, quicken the auxiliary judgement sign and be changed to 1.When speed of a motor vehicle acceleration/accel is not more than zero, judge whether standard-sized sheet of throttle.If throttle wide then quickens the auxiliary judgement sign and is changed to 1, if throttle standard-sized sheet not then quickens the auxiliary judgement sign and is changed to 0.
Figure 3 shows that accelerating mode,, under accelerating mode, judge at first whether accelerator open degree is constant simultaneously referring to Fig. 4,5,6.If accelerator open degree is constant, then judge whether standard-sized sheet of throttle.If throttle is not a standard-sized sheet, illustrates and quicken to finish.Judge then whether the auxiliary timer that successively decreases is zero, if timer is zero, then explanation is quickened just to finish, and timer is set to fixed value T1, and during this period of time promptly, the auxiliary quantity of motor reduces Tdec at every turn, and reduces to zero gradually.When the motor auxiliary quantity is reduced to less than when equalling zero, the motor auxiliary quantity is set to 0.And give motor assist command value with the motor auxiliary quantity, then the electric power generation bid value is made as zero.Non-vanishing or motor auxiliary quantity illustrate to be in the auxiliary process of successively decreasing greater than zero the time when timer, subsequently the motor auxiliary quantity is given motor assist command value, and the electric power generation bid value is made as zero.
When throttle wide, illustrate to be under the bigger situation of demand torque.Judge whether this moment to enter this situation for the first time, if T2 non-cutting time then is set.Promptly under the situation of throttle wide, the auxiliary time of motor is T2.Wherein T2 is a constant value.If not entering for the first time, judge then whether throttle wide auxiliary timing device is zero.If be zero, then auxiliary the end, the auxiliary value of motor is made as zero.If non-vanishing, it is Taacc that the motor auxiliary quantity then is set, and wherein Taacc is constant value.After the motor auxiliary quantity is set, further table look-up and try to achieve the auxiliary coefficient of correction Ksoc of motor, Ksoc be multiply by the motor auxiliary quantity and gives the motor auxiliary quantity according to SOC.Whether judge the motor auxiliary quantity then greater than Tacc, wherein Tacc is a constant value.If the motor auxiliary quantity is greater than Tacc, then the motor auxiliary quantity is set to Tacc.If the motor auxiliary quantity is not more than Tacc, then further tables look-up and ask current motor maximum torque.If the motor auxiliary quantity is greater than current motor maximum torque, then the motor auxiliary quantity is set to current motor maximum torque, then the motor auxiliary quantity is given motor assist command value.If the motor auxiliary quantity is not more than current motor maximum torque, then directly the motor auxiliary quantity is given motor assist command value.
When accelerator open degree changes, whether further judge the accelerator open degree variable quantity greater than acc, wherein acc is a constant value.If less than acc, then the motor auxiliary quantity is set to 0.When greater than acc, then search the motor auxiliary quantity according to accelerator open degree.When the variable quantity that promptly has only accelerator open degree was enough big, it is auxiliary that motor just provides.
Table look-up according to acceleration/accel then and ask acceleration/accel to assist coefficient of correction, again this coefficient be multiply by the motor auxiliary quantity.
Flow process subsequently is the same.

Claims (6)

1, a kind of control method of hybrid vehicle comprises following controlled step:
A, big electric motor starting control: enough at SOC, the electric system trouble free, ambient temperature is higher than under the uniform temperature situation, adopts big electric motor starting driving engine, and when engine speed reached idling speed, motor reduced to assist again gradually, and driving engine begins fuel feeding work;
B, starting aux. controls: when the speed of a motor vehicle is lower, rotating speed is also lower, and accelerator open degree greater than the auxiliary accelerator open degree of starting down in limited time, if SOC allows, then motor provides auxiliary;
C, idle stop control: when satisfying following condition simultaneously, driving engine enters auto idle speed shutdown/starting state: accelerator open degree and throttle opening are zero, engine coolant temperature is greater than the lower limit of carrying out idle stop, the brake vacuum degree is greater than the lower limit of carrying out idle stop, SOC is greater than the lower limit of carrying out idle stop, engine speed is lower than the lower limit rotating speed that cruises and slow down, the speed of a motor vehicle is lower than the higher limit of carrying out idle stop or the speed of a motor vehicle and is lower than another higher limit of carrying out idle stop and touches on the brake simultaneously, and power-transfer clutch separately or hang neutral gear;
D, acceleration aux. controls: during accelerating mode,, multiply by again respectively according to SOC and the definite auxiliary quantity coefficient of correction of acceleration/accel according to accelerator open degree retrieval motor auxiliary quantity.
E, regenerative brake control: machine operation is at generating state when the relieving throttle slides, at this moment, table look-up according to the speed of a motor vehicle and to determine the deceleration power generation torque, wherein, when the speed of a motor vehicle during less than certain value and ABS make the time spent power generation torque and equal zero, after determining the electric power generation moment of torsion, multiply by the regenerative electric power coefficient of correction of determining according to SOC again, obtain final power generation torque.
2, the control method of hybrid vehicle according to claim 1 is characterized in that:
When described starting aux. controls, search auxiliary quantity according to accelerator open degree and rotating speed, multiply by the auxiliary quantity coefficient of determining according to SOC again, auxiliary computing value obtains starting to walk, motor is started from scratch progressively increases auxiliary quantity up to equaling auxiliary computing value, when the speed of a motor vehicle or rotating speed increase to a certain value, reduce auxiliary quantity gradually up to equaling 0.
3, the control method of hybrid vehicle according to claim 1 is characterized in that:
Under the idle stop state of a control, when satisfying following condition, withdraw from the idle stop state, the rapid again start the engine of big motor:
A, be reduced to before 0,, then withdraw from the idle stop state, enter starting state if degree of vacuum is not enough or gearing in the speed of a motor vehicle;
B, be reduced to after 0,, enter starting state if gearing in or step on the accelerator then withdraw from the idle stop state in the speed of a motor vehicle.
4, the control method of hybrid vehicle according to claim 1 is characterized in that:
Control method also comprises the Generation Control of cruising: the two kinds of situations of having cruised herein, and first kind is by cruising that cruise control is controlled, and this moment, accelerator open degree was zero, and throttle opening is non-vanishing, and the speed of a motor vehicle is constant; Second kind of situation is by cruising that the driver controls, and this moment, accelerator open degree and throttle opening were all non-vanishing, and it is constant substantially that the driver controls accelerator open degree, and it is constant that the speed of a motor vehicle keeps substantially.
5, the control method of hybrid vehicle according to claim 4 is characterized in that:
When cruising condition, electric power generation is determined the power generation torque that cruises to battery charge according to engine speed when SOC is lower than certain value, and multiply by the generating coefficient of determining according to SOC that cruises.
6, the control method of hybrid vehicle according to claim 4 is characterized in that: under first kind of cruising condition, heighten the aperture of engine air throttle by cruise control automatically according to engine loading, improve the output torque of driving engine; Under second kind of cruising condition, send the engine torque increase according to the electric power generation moment of torsion and order EMS, heighten the engine air throttle aperture, increase engine output torque.The output torque that driving engine increases is used for generating electricity.
CNA2006100981845A 2006-12-08 2006-12-08 Mixed power automobile controlling method Pending CN1986304A (en)

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CN101982357A (en) * 2010-10-26 2011-03-02 奇瑞汽车股份有限公司 Automobile energy-saving control system and control method thereof
CN102001277A (en) * 2009-08-31 2011-04-06 比亚迪股份有限公司 Hybrid drive system, control method thereof and vehicle with hybrid drive system
CN102030005A (en) * 2010-12-10 2011-04-27 上海中科深江电动车辆有限公司 Automatic mechanical transmission control method in inertia sliding state of electric automobile
CN102164799A (en) * 2008-09-23 2011-08-24 标致·雪铁龙汽车公司 Method and device for monitoring a hybrid vehicle power storage system
CN101367381B (en) * 2007-08-17 2011-12-14 奇瑞汽车股份有限公司 Weak hybrid power automobile motor control method
CN102452321A (en) * 2010-10-19 2012-05-16 三菱自动车工业株式会社 Motor torque control device
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CN107834720A (en) * 2015-08-24 2018-03-23 吴红平 Using the automobile using starter-generator of winding control technology
CN105099302A (en) * 2015-08-24 2015-11-25 张景生 Improved structure of starter generator
CN107947314A (en) * 2015-08-24 2018-04-20 陈国栋 Automobile using starter-generator and its method of work
CN105099302B (en) * 2015-08-24 2018-06-12 江苏江南电机有限公司 A kind of starter-generator improved structure
CN107878179A (en) * 2016-01-21 2018-04-06 厦门市福工动力技术有限公司 A kind of hybrid power system and its control method
CN107878179B (en) * 2016-01-21 2019-07-09 厦门市福工动力技术有限公司 A kind of hybrid power system and its control method
CN110435568A (en) * 2019-08-19 2019-11-12 江西博能上饶客车有限公司 A kind of control system for electric motor coach vehicle
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CN112428789B (en) * 2020-11-09 2022-08-30 东风汽车集团有限公司 Method and system for graded management of electric load of engine
CN115416639A (en) * 2022-09-16 2022-12-02 广州汽车集团股份有限公司 Method and device for controlling engine speed of automobile, electronic equipment and storage medium
CN115416639B (en) * 2022-09-16 2023-10-13 广州汽车集团股份有限公司 Engine speed control method and device for automobile, electronic equipment and storage medium

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