CN102848899B - Method and system of clutch control for hybrid electric vehicle - Google Patents
Method and system of clutch control for hybrid electric vehicle Download PDFInfo
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- CN102848899B CN102848899B CN201110176636.8A CN201110176636A CN102848899B CN 102848899 B CN102848899 B CN 102848899B CN 201110176636 A CN201110176636 A CN 201110176636A CN 102848899 B CN102848899 B CN 102848899B
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Abstract
The invention provides a method and a system of clutch control for a hybrid electric vehicle. The method includes the steps of detecting signals of an accelerator pedal of a hybrid electric vehicle, and determining whether the accelerator pedal is released or not; calculating delay time of the released accelerator pedal, comparing the delay time with a set time, and continuing calculating the delay time and comparing the delay time with the set time if the delay time is smaller than the set time and occurrence of no brake signal is confirmed; executing subsequent steps if the delay time is smaller than the set time and brake signals occur, or the delay time is the same as the set time; and starting a clutch of the hybrid electric vehicle to charge a power battery. The hybrid electric vehicle with the system is adaptive to road conditions which require constant change of release and step-down of the accelerator pedal. Therefore, the hybrid electric vehicle can be prevented from frequent opening and closure of the clutch, wear of the clutch is reduced, and the service life of the clutch is prolonged effectively.
Description
Technical field
The present invention relates to a kind of control method and system of hybrid vehicle, particularly relate to clutch control method and the system of hybrid vehicle, belong to Development of HEV Technology field.
Background technology
At present, cross in journey at hybrid electric vehicle, if chaufeur will speed up pedal release, power-transfer clutch will perform the action be separated, and prepares for reclaiming braking energy.But in the driving process of reality, especially on expressway, if chaufeur is according to the traffic conditions of road, need to will speed up pedal release, now disengaging of clutch, if find at short notice to be in safety distance with front vehicles, chaufeur will bend the throttle again, now power-transfer clutch will be in conjunction with, will cause the frequent opening and closing of power-transfer clutch like this.Thus cause the accelerated wear test of power-transfer clutch, shorten the service life of power-transfer clutch.
In addition, current clutch control method is when collecting acceleration pedal release or having brake pedal signal, will cut-off clutch.If but now the state-of-charge (state of charge is called for short SOC) of battery is very high, motor can not carry out the recovery of braking energy, certainly will cause the increase of stopping distance, and brake safe can not ensure.
Summary of the invention
An object of the present invention for providing a kind of clutch control method and system of hybrid-electric car, to solve due to acceleration pedal release and the continuous change of stepping on, and the problem of the frequent opening and closing of the power-transfer clutch caused.
Another object of the present invention, for providing a kind of clutch control method and system of hybrid-electric car, when reducing power-transfer clutch and frequently opening, ensures braking safety and the sensation of deceleration when sliding conformability.
To achieve these goals, the clutch control method of hybrid vehicle provided by the invention comprises the following steps: the acceleration pedal signal obtaining hybrid vehicle, and judges that acceleration pedal discharges; Calculate the delay time that acceleration pedal has discharged, and this delay time is compared with a setting-up time, if this delay time is less than this setting-up time, and judge that brakeless signal occurs, then continue calculate this delay time and compare with this setting-up time, and when equaling this setting-up time this delay time, perform subsequent step; If this delay time is less than this setting-up time, and judge have speed-slackening signal to occur, then perform subsequent step; Open the power-transfer clutch of hybrid vehicle with to power battery charging.
According to a kind of preferred implementation of the clutch control method of above-mentioned hybrid vehicle, wherein, before the power-transfer clutch step of opening hybrid vehicle, further comprising the steps of: the SOC detecting the power battery of hybrid vehicle, and this SOC is compared with a set condition value, if this SOC is less than this set condition value, then open the power-transfer clutch of hybrid vehicle.
According to a kind of preferred implementation of the clutch control method of above-mentioned hybrid vehicle, wherein, after the step comparing this SOC and this set condition value, if this SOC is more than or equal to this set condition value, then make the anti-moving velocity dragging to reduce hybrid vehicle of the driving engine of hybrid vehicle.
In order to realize object of the present invention, the clutch control of hybrid vehicle provided by the invention is located in the control unit for vehicle of hybrid vehicle or is coupled to the control unit for vehicle of hybrid vehicle, and it comprises acceleration pedal signal acquisition module, chaufeur deceleration intention identification module and power-transfer clutch and opens control module.Acceleration pedal signal acquisition module is for obtaining acceleration pedal signal and judging that acceleration pedal discharges; Chaufeur deceleration intention identification module is connected with described acceleration pedal signal acquisition module, for calculating delay time that acceleration pedal discharged and obtaining a speed-slackening signal; And for comparing this delay time and a setting-up time, if be less than this setting-up time this delay time, and do not obtain this speed-slackening signal, then continue calculate this delay time and compare with this setting-up time; Power-transfer clutch is opened control module and is connected with described chaufeur deceleration intention identification module, for being less than this setting-up time in this delay time and after having received this speed-slackening signal or having equaled this setting-up time this delay time, the power-transfer clutch opening hybrid vehicle is with to power battery charging.
According to a kind of preferred implementation of the clutch control of above-mentioned hybrid vehicle, wherein, also comprise power battery charged state judge module: be connected between described chaufeur deceleration intention identification module and power-transfer clutch unlatching control module, for judging to be less than this setting-up time this delay time at described chaufeur deceleration intention identification module and after having received this speed-slackening signal or having equaled this setting-up time this delay time, obtain the SOC of electrokinetic cell and compare with a set condition value, if this SOC is less than this set condition value, then open the power-transfer clutch of hybrid vehicle.
According to a kind of preferred implementation of the clutch control of above-mentioned hybrid vehicle, wherein, also comprise that driving engine is counter drags control module, be connected with described power battery charged state judge module, after judging that at power battery charged state judge module this SOC is more than or equal to this set condition value, the driving engine of control hybrid vehicle is counter drags the moving velocity reducing hybrid vehicle.
After hybrid vehicle adopts the present invention, the road traffic condition of continuous change that can adapt to acceleration pedal release and step on.Thus enough make hybrid vehicle avoid the frequent opening and closing of power-transfer clutch in the process of moving, decrease the wearing and tearing of power-transfer clutch, effectively improve the service life of power-transfer clutch.A preferred implementation of the present invention can also ensure braking safety and sensation conformability of slowing down when sliding further by the judgement of power battery charged state.
Accompanying drawing explanation
Fig. 1 is the structural representation of the clutch control preferred embodiment of hybrid vehicle of the present invention;
Fig. 2 is the schematic flow sheet of the clutch control method preferred embodiment of hybrid vehicle of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Fig. 1 shows the principle structure of the clutch control preferred embodiment of hybrid vehicle of the present invention, this preferred embodiment is applicable to be configured with the parallel of power-transfer clutch and Series-Parallel HEV, it is located in the control unit for vehicle 7 of hybrid vehicle, the power of this hybrid vehicle and driving system comprise the driving engine (engine) 1 connected successively, power-transfer clutch (clutch) 2, motor (comprising electrical generator and electrical motor) (motor) 3, electrokinetic cell 31, automatic mechanical transmission (automatic mechanicaltransmission, be called for short AMT) 4, main reduction gear 5, diff 6, the control system of power and driving system comprises control unit of engine (Engine Control Unit, be called for short ECU) 71, electrodynamic type clutch control unit (Electric Clutch Control Unit, be called for short ECCU) 72, motor control unit (Motor Control Unit, be called for short MCU) 73, battery management system (Battery Manager System, be called for short BMS) 74, motion control unit (Transmission Control Unit, be called for short TCU) 75 and control unit for vehicle (the Vehicle Control Unit that jointly connects of aforementioned each unit, be called for short VCU) 7.Control unit for vehicle 7 receives, analyze, process the status information of each control unit, and to each control unit send control signal stablize to control various vehicle components, safety operation.
This preferred embodiment be located in control unit for vehicle 7 comprises acceleration pedal signal acquisition module 701, chaufeur deceleration intention identification module 702, power battery charged state judge module 703, power-transfer clutch opens control module 704 and driving engine is counter drags control module 705.
Wherein, acceleration pedal signal acquisition module 701 for obtaining acceleration pedal signal, and judges that acceleration pedal discharges.Such as, chaufeur finds upcoming traffic complex, in order to avoid meeting accident, the speed of a motor vehicle should be reduced, avoid keeping acceleration pedal continuous running, so release the accelerator pedal, after acceleration pedal signal acquisition module 701 obtains acceleration pedal release signal, send enabled instruction to connected chaufeur deceleration intention identification module 702; If do not obtain acceleration pedal release signal, then exit this preferred embodiment or continue to wait for obtain pedal release signal.
Chaufeur deceleration intention identification module 702 is for delay time of calculating acceleration pedal and having discharged and obtain a speed-slackening signal.After acceleration pedal release signal occurs, this preferred embodiment is not separated the power-transfer clutch of hybrid vehicle as prior art, but after the generation of autoacceleration pedal release signal, start the delay time calculating this release signal, and compare this delay time and a setting-up time, this setting-up time is a scalar quantity, and its length can be undertaken presetting by testing crew before automobile dispatches from the factory.Chaufeur deceleration intention identification module 702 calculated the delay time of the acceleration pedal release signal obtained before not reaching this setting-up time, and do not obtain the speed-slackening signal that brake pedal is operated, then continue calculate this delay time and compare with this setting-up time, until equal this setting-up time this delay time or obtain speed-slackening signal, just start power-transfer clutch and open control module 704, charged to electrokinetic cell 31 by motor 3 to make the braking energy of driving engine 1.By increasing the judgement of delay time and setting-up time, this preferred embodiment can reduce the frequency of power-transfer clutch opening and closing, extends the service life of power-transfer clutch.
In order to ensure the braking safety of the motor vehicle driven by mixed power applying this preferred embodiment and sensation conformability of slowing down when sliding, this preferred embodiment also comprises the power battery charged state judge module 703 be connected between chaufeur deceleration intention identification module 702 and power-transfer clutch unlatching control module 704, power battery charged state judge module 703 is this delay time for judging to be less than this setting-up time at chaufeur deceleration intention identification module 702 and after having received this speed-slackening signal or having equaled this setting-up time this delay time, obtain the SOC of electrokinetic cell 31 by battery management system 74 and compare with a set condition value, if this SOC is less than this set condition value, then send control signal to open the power-transfer clutch 2 of hybrid vehicle to electrodynamic type clutch control unit 72.The SOC of electrokinetic cell 31 is too high, not only affect braking safety, and be unfavorable for extending its service life, such as some electrokinetic cell 31, its electricity should maintain less than 80% of its All Told Measurement, therefore, this set condition value can be set as, but be not limited to, 80% of All Told Measurement.
Power-transfer clutch is opened control module 704 and is connected with power battery charged state judge module 703, for being less than this setting-up time in this delay time and after having received this speed-slackening signal or having equaled this setting-up time this delay time, the power-transfer clutch 2 opening hybrid vehicle is charged to electrokinetic cell 31 by motor 3 to make driving engine 1.
If power battery charged state judge module 703 judges that this SOC is more than or equal to this set condition value, control unit for vehicle 7 can select conventional brake.But this preferred embodiment then comprises, and driving engine is counter to be dragged control module 705 driving engine 1 is counter to be dragged to be made by control unit of engine 71, the anti-control module 705 of dragging of driving engine is also connected with power battery charged state judge module 703, judge that this SOC is more than or equal to the result startup of this set condition value according to power battery charged state judge module 703, the driving engine of control hybrid vehicle is counter drags the moving velocity reducing hybrid vehicle, driving engine is counter drags the utilization of control module 705 to shorten stopping distance, improves safety.
Fig. 2 shows the operation sheet of the clutch control method preferred embodiment of hybrid vehicle of the present invention.Method preferred embodiment described in Fig. 2 goes for, but is not limited to, the System Preferred embodiments shown in Fig. 1.
In order to describe the clutch control method preferred embodiment of hybrid vehicle of the present invention more intuitively, be described below in conjunction with Fig. 1.
In the method preferred embodiment shown in Fig. 2, at execution step S101: after starting, acceleration pedal signal acquisition module 701 performs step S103: continue to detect acceleration pedal, and perform step S105: determine whether pedal release? if do not obtain pedal signal, then directly perform step S119: the operation of method ends; If obtain pedal release signal, do you then perform step S107 by chaufeur deceleration intention identification module 702: judge that the delay time that pedal discharges is less than a setting-up time? if this delay time equals setting-up time, then perform step S111 by power battery charged state judge module 703: the SOC detecting electrokinetic cell 31.As step S109, if do not reach the process of setting-up time in this delay time before, chaufeur deceleration intention identification module 702 receives a speed-slackening signal, then directly perform step S111 by power battery charged state judge module 703: the SOC detecting electrokinetic cell 31; In step S109, if chaufeur deceleration intention identification module 702 does not receive speed-slackening signal, then by the size of this delay time of lasting judgement and setting-up time, until equal, and perform step S111 by power battery charged state judge module 703.Power battery charged state judge module 703 then performs step S113: judge SOC and a set condition value after performing step S111 acquisition SOC.If SOC is less than set condition value, then opens control module 704 by power-transfer clutch and perform step S115: open power-transfer clutch and charge to electrokinetic cell 31.If SOC is more than or equal to set condition value, then enter step S117: do not open power-transfer clutch, and make the anti-speed dragging to reduce hybrid vehicle of driving engine by the anti-control module 705 of dragging of driving engine by control unit of engine 71.
To sum up, the delay time of the present invention by increase acceleration pedal release signal and the comparison of a setting-up time, can avoid the frequent opening and closing of power-transfer clutch, decrease the wearing and tearing of power-transfer clutch, make significantly increase the service life of power-transfer clutch whereby.The present invention is compared by the state-of-charge increasing electrokinetic cell again, then can, according to the real time electrical quantity of electrokinetic cell, realize its intelligent charge, ensures the safety of braking and deceleration sensation conformability when sliding.
As known by the technical knowledge, the present invention can be realized by other the embodiment not departing from its Spirit Essence or essential feature.Therefore, above-mentioned disclosed embodiment, with regard to each side, being all casehistory, is not only.Within the scope of the present invention all or be all included in the invention being equal to the change in scope of the present invention.
Claims (2)
1. a clutch control method for hybrid vehicle, is characterized in that, comprises the following steps:
Detect the acceleration pedal signal of hybrid vehicle, and judge that acceleration pedal discharges;
Calculate the delay time that acceleration pedal has discharged, and this delay time is compared with a setting-up time, if this delay time is less than this setting-up time, and judge that brakeless signal occurs, then continue calculate this delay time and compare with this setting-up time, and when equaling this setting-up time this delay time, perform subsequent step; If this delay time is less than this setting-up time, and judge have speed-slackening signal to occur, then perform subsequent step;
Detect the SOC of the power battery of hybrid vehicle, and this SOC is compared with a set condition value, if judge, this SOC is less than this set condition value, then open the power-transfer clutch of hybrid vehicle, if this SOC is more than or equal to this set condition value, then make the anti-moving velocity dragging to reduce hybrid vehicle of the driving engine of hybrid vehicle;
Open the power-transfer clutch of hybrid vehicle with to power battery charging.
2. a clutch control for hybrid vehicle, be located in the control unit for vehicle of hybrid vehicle or be coupled to the control unit for vehicle of hybrid vehicle, it is characterized in that, comprising:
Acceleration pedal signal acquisition module: for obtaining acceleration pedal signal and judging that acceleration pedal discharges;
Chaufeur deceleration intention identification module: be connected with described acceleration pedal signal acquisition module, for calculating delay time that acceleration pedal discharged and obtaining a speed-slackening signal; And, for comparing this delay time and a setting-up time, if be less than this setting-up time this delay time, and do not obtain this speed-slackening signal, then continue calculate this delay time and compare with this setting-up time;
Power-transfer clutch opens control module: be connected with described chaufeur deceleration intention identification module, for being less than this setting-up time in this delay time and after having received this speed-slackening signal or having equaled this setting-up time this delay time, the power-transfer clutch opening hybrid vehicle is with to power battery charging;
Power battery charged state judge module: be connected between described chaufeur deceleration intention identification module and power-transfer clutch unlatching control module, for judging to be less than this setting-up time this delay time at described chaufeur deceleration intention identification module and after having received this speed-slackening signal or having equaled this setting-up time this delay time, obtain the SOC of electrokinetic cell and compare with a set condition value, if this SOC is less than this set condition value, then open the power-transfer clutch of hybrid vehicle; And
Driving engine is counter drags control module: be connected with described power battery charged state judge module, after judging that at power battery charged state judge module this SOC is more than or equal to this set condition value, the driving engine of control hybrid vehicle is counter drags the moving velocity reducing hybrid vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110176636.8A CN102848899B (en) | 2011-06-28 | 2011-06-28 | Method and system of clutch control for hybrid electric vehicle |
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| CN201110176636.8A CN102848899B (en) | 2011-06-28 | 2011-06-28 | Method and system of clutch control for hybrid electric vehicle |
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| CN102848899A CN102848899A (en) | 2013-01-02 |
| CN102848899B true CN102848899B (en) | 2015-04-22 |
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| CN105292110B (en) * | 2015-10-12 | 2017-11-28 | 北京汽车股份有限公司 | Vehicle energy saving control method |
| CN109941112A (en) * | 2017-12-20 | 2019-06-28 | 郑州宇通客车股份有限公司 | A kind of vehicle and its battery charging control method, system |
Citations (2)
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| CN101541607A (en) * | 2006-11-22 | 2009-09-23 | 五十铃自动车株式会社 | Control device for power transmission device for vehicle |
| CN101959730A (en) * | 2008-03-03 | 2011-01-26 | 日产自动车株式会社 | Control apparatus and method for controlling a hybrid vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6177536A (en) * | 1984-09-22 | 1986-04-21 | Fuji Heavy Ind Ltd | Control of continuously variable transmission equipped with electromagnetic powder type clutch |
| US7625313B2 (en) * | 2005-12-06 | 2009-12-01 | Toyota Jidosha Kabushiki Kaisha | Shift control device and shift control method of vehicular automatic transmission |
| KR100859662B1 (en) * | 2007-09-28 | 2008-09-23 | 콘티넨탈 오토모티브 시스템 주식회사 | Slope road control device and method for hybrid vehicle |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101541607A (en) * | 2006-11-22 | 2009-09-23 | 五十铃自动车株式会社 | Control device for power transmission device for vehicle |
| CN101959730A (en) * | 2008-03-03 | 2011-01-26 | 日产自动车株式会社 | Control apparatus and method for controlling a hybrid vehicle |
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