CN102897041A - Regenerative braking torque distribution method of all-wheel drive hybrid power system - Google Patents
Regenerative braking torque distribution method of all-wheel drive hybrid power system Download PDFInfo
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- CN102897041A CN102897041A CN2012103720912A CN201210372091A CN102897041A CN 102897041 A CN102897041 A CN 102897041A CN 2012103720912 A CN2012103720912 A CN 2012103720912A CN 201210372091 A CN201210372091 A CN 201210372091A CN 102897041 A CN102897041 A CN 102897041A
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Abstract
The invention relates to a regenerative braking torque distribution method of an all-wheel drive hybrid power system and belongs to the field of new energy automobiles. A finished automobile controller collects information of finished automobile system components and sets regenerative braking torque of an integrated starter generator (ISG) motor and a rear-drive motor, and energy utilization efficiencies of the system are improved on the premise that system safety is guaranteed. The regenerative braking torque distribution method has the advantages that the method is a controlling method capable of maximally recycling braking energy on the premise that braking safety of the vehicle system is guaranteed, and the energy recycling rate of the system is improved; and simultaneously, work of a hydraulic braking system and an anti-lock brake system (ABS) of a prototype automobile are not required to be changed, the braking energy recycling method based on the braking system and the ABS of the prototype automobile is provided, and vehicle braking safety performances of the hybrid power system are guaranteed.
Description
Technical field
The present invention relates to the new-energy automobile field, relate in particular to a kind of four-drive hybrid electric system regeneration brake torque distribution method.
Background technology
Under the background that the pure electric automobile battery technology does not get a qualitative improvement, be limited by battery cost and performance, the following several years, pure electric automobile is difficult to Quantity production.Hybrid power is as a kind of transition scheme, and its system changes little, is more suitable for scale of mass production, and the four-drive hybrid electric fuel saving ratio is higher, is subject at present domestic and international automobile manufacturing company favor.
Be in the middle of 201110022220.0 the patent, to disclose the method that a kind of motor vehicle driven by mixed power braking energy reclaims at Chinese application number.Wherein relate to by entire car controller and calculate the required lock torque of car load, and the lock torque of the lock torque of distribution antero posterior axis and minute gas-distributing motor and hydraulic braking, guarantee the abbreviation of high-tension battery SOC(state of charge, refer to state-of-charge) carry out as far as possible efficiently the method that braking energy reclaims in the situation about can not overflow.Yet, in the middle of the disclosed content, not mention when high-tension battery breaks down, when electric system breaks down or the ABS system of car load when breaking down, brake energy recovering system is the brake safe that how to guarantee vehicle.
Summary of the invention
The purpose of this invention is to provide a kind of four-drive hybrid electric system regeneration brake torque distribution method, to overcome present prior art above shortcomings.
The objective of the invention is to be achieved through the following technical solutions:
A kind of four-drive hybrid electric system regeneration brake torque distribution method may further comprise the steps:
(1) entire car controller receives ISG(by car load CAN network and starts power generation all-in-one machine) motor, rear-guard motor, high tension battery and ABS(anti-lock brake system) etc. every data parameters, then store; And by data acquisition reception speed information, entire vehicle gear information, Das Gaspedal amplitude information and brake pedal information etc.;
(2) entire car controller detects whether et out of order of high tension battery system, and whole-control system forbidding regenerating braking energy reclaims function when high tension battery system et out of order; Otherwise, carry out step (3);
(3) judge whether to satisfy regenerative brake condition and system normal, if satisfy, then the whole-control system braking energy that calculates and set ISG motor and rear-guard motor reclaims moment of torsion; Otherwise, if do not satisfy regenerative brake condition and system's mal, then carry out step (4);
(4) when ISG motor et out of order and rear-guard motor when not having fault, whole-control system control is implemented braking energy by the rear-guard motor and is reclaimed; Otherwise when rear-guard motor et out of order and ISG motor when not having fault, whole-control system control is implemented braking energy by the ISG motor and is reclaimed; And
(5) when ISG motor and the equal et out of order of rear-guard motor, whole-control system control forbidding regenerative braking capability.
Further, in the described step (3), entire car controller determines whether according to information such as acceleration pedal amplitude, brake pedal amplitude, gear information, the speed of a motor vehicle and high tension battery SOC and satisfies the regenerative brake condition.Preferably, the described acceleration pedal amplitude of working as is lower than 10%, and the brake pedal amplitude is higher than 10%, and vehicle is at the gear that advances, and the speed of a motor vehicle is higher than 10km/h, when high tension battery SOC is lower than 70%, judges that then vehicle satisfies the regenerative brake condition.
Preferably, the regenerative braking torque of described setting meets the limit value of the regenerative braking moment of the desired front axle of ABS system, and when ABS system et out of order, the regenerative braking moment of setting the ISG motor is zero.
Abbreviation: SOC: battery charge state; ISG: start power generation all-in-one machine; ABS: anti-lock brake system; BMS: battery management system; MCU: electric machine controller.
Beneficial effect of the present invention is: the present invention is the control method that a kind of braking energy reclaims, and under the prerequisite that guarantees the Vehicular system brake safe, the recovery of larger execution braking energy has improved the energy recovery rate of system; The unify work of ABS system of the hydraulic braking sysgtem that simultaneously the present invention need not to change prototype engine, a kind of method for recovering brake energy based on prototype engine brake system and ABS system is provided, has guaranteed to a certain extent the car brakeing safety performance of hybrid power system.
Description of drawings
The below is described in further detail the present invention with reference to the accompanying drawings.
Fig. 1 is the control logic schematic diagram of the described a kind of four-drive hybrid electric system regeneration brake torque distribution method of the embodiment of the invention.
The specific embodiment
As shown in Figure 1, the described a kind of four-drive hybrid electric system regeneration brake torque distribution method of the embodiment of the invention, may further comprise the steps: entire car controller receives every data parameters of ISG motor, rear-guard motor, high tension battery and ABS system etc. by car load CAN network, then store; And by data acquisition reception speed information, entire vehicle gear information, Das Gaspedal amplitude information and brake pedal information etc.Entire car controller according to obtain relevant information, control braking energy recovering function work, specific as follows:
When battery management system reported and submitted high tension battery to have fault, entire car controller was closed braking energy recovering function; Otherwise when state of the system is normal, reasonable distribution braking energy between rear-guard motor and ISG motor reclaims moment according to brake pedal and ABS feedback signal, guarantee to greatest extent recuperated energy and non-slip of vehicle, be whole-control system is determined regenerative brake according to brake pedal amplitude, speed of a motor vehicle state and high tension battery state-of-charge moment, simultaneously ISG motor and rear-guard motor regenerative braking moment are subject to the restriction of limit value of the antero posterior axis regenerative braking moment of ABS system requirements, and when ABS system et out of order, the regenerative braking moment of setting motor is zero; Otherwise when the normal and ISG motor of rear-guard electric system breaks down, whole-control system is determined regenerative braking moment according to brake pedal amplitude, speed of a motor vehicle state and high tension battery state-of-charge and is distributed to the rear-guard motor and carry out the braking energy recovery, simultaneously the rear-guard motor will be subject to the restriction of limit value of the rear axle regenerative braking moment of ABS system requirements, and when ABS system et out of order, the regenerative braking moment of setting the rear-guard motor is zero; Otherwise when the rear-guard electric system breaks down and ISG electric system when normal, the entire car controller system determines regenerative braking moment according to brake pedal amplitude, speed of a motor vehicle state and high tension battery state-of-charge and distributes to the ISG motor and carry out the braking energy recovery, simultaneously the ISG motor will be subject to the restriction of limit value of the front axle regenerative braking moment of ABS system requirements, and when ABS system et out of order, the regenerative braking moment of setting the ISG motor is zero; Otherwise when two electric systems all break down, close braking energy recovering function, guarantee vehicle safety.
When the high tension battery system broke down, the forbidding regenerating braking energy reclaimed function; When chaufeur is controlled automobile to relax brake mode, and road adherence is enough high, high-tension battery SOC electric weight is lower, entire car controller sends instruction to the rear-guard motor and carries out the braking energy recovery, if during the limit value of the rear axle regenerative braking moment of ABS system requirements, entire car controller reclaims moment according to the braking that the system requirements of ABS are set the rear-guard motor, simultaneously both difference is set as the regenerative braking moment of ISG motor.
When the SOC of high tension battery is too high, stops regenerating braking energy and reclaim function.Typically, when SOC is higher than 70%, stops regenerating braking energy and reclaim function; When chaufeur ran into the emergency situation emergency brake, then simultaneously braking energy recovery of rear-guard motor and ISG motor was in the hope of allowing as early as possible car brakeing; When the speed of a motor vehicle is higher, when the rear-guard motor is thrown off, brake recuperated energy and all finished by the ISG motor.
When the ISG motor breaks down, but in the normal situation of rear-guard motor, braking energy reclaims and is finished by the rear-guard motor, regenerative braking moment meets the ABS system for the restriction of the limit value of front axle brake moment simultaneously, when the ABS system broke down, whole-control system was set as zero with regenerative braking moment; When the rear-guard motor breaks down, but in the normal situation of ISG motor, braking energy reclaims and is finished by the ISG motor, and regenerative braking moment meets the ABS system for the limit value of rear axle lock torque simultaneously, when the ABS system broke down, whole-control system was set as zero with regenerative braking moment; When two motors all break down, then close braking energy recovering function.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but do any variation in its shape or structure; every have identical with a application or akin technical scheme, all drops within protection scope of the present invention.
Claims (4)
1. a four-drive hybrid electric system regeneration brake torque distribution method is characterized in that, may further comprise the steps:
(1) entire car controller receives the data parameters of ISG motor, rear-guard motor, high tension battery and ABS system by car load CAN network, then stores; And by data acquisition reception speed information, entire vehicle gear information, Das Gaspedal amplitude information and brake pedal information;
(2) entire car controller detects whether et out of order of high tension battery system, and whole-control system forbidding regenerating braking energy reclaims function when high tension battery system et out of order; Otherwise, carry out step (3);
(3) judge whether to satisfy regenerative brake condition and system normal, if satisfy, then the whole-control system braking energy that calculates and set ISG motor and rear-guard motor reclaims moment of torsion; Otherwise, if do not satisfy regenerative brake condition and system's mal, then carry out step (4);
(4) when ISG motor et out of order and rear-guard motor when not having fault, whole-control system control is implemented braking energy by the rear-guard motor and is reclaimed; Otherwise when rear-guard motor et out of order and ISG motor when not having fault, whole-control system control is implemented braking energy by the ISG motor and is reclaimed; And
(5) when ISG motor and the equal et out of order of rear-guard motor, whole-control system control forbidding regenerative braking capability.
2. four-drive hybrid electric system regeneration brake torque distribution method according to claim 1, it is characterized in that: in the described step (3), entire car controller determines whether according to acceleration pedal amplitude, brake pedal amplitude, gear information, the speed of a motor vehicle and high tension battery SOC information and satisfies the regenerative brake condition.
3. four-drive hybrid electric system regeneration brake torque distribution method according to claim 2, it is characterized in that: when the acceleration pedal amplitude is lower than 10%, the brake pedal amplitude is higher than 10%, vehicle is higher than 10km/h in the gear that advances, the speed of a motor vehicle, when high tension battery SOC is lower than 70%, judges that then vehicle satisfies the regenerative brake condition.
4. four-drive hybrid electric system regeneration brake torque distribution method according to claim 3, it is characterized in that: the regenerative braking torque of setting meets the limit value of the regenerative braking moment of the desired front axle of ABS system, when ABS system et out of order, the regenerative braking moment of setting the ISG motor is zero.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210372091.2A CN102897041B (en) | 2012-09-29 | 2012-09-29 | A kind of four-wheel-drive hybrid power system regenerative braking torque distribution method |
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| CN201210372091.2A CN102897041B (en) | 2012-09-29 | 2012-09-29 | A kind of four-wheel-drive hybrid power system regenerative braking torque distribution method |
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| CN102897041B CN102897041B (en) | 2015-10-28 |
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| CN105658463A (en) * | 2013-10-10 | 2016-06-08 | 日产自动车株式会社 | Control device for four-wheel drive electric vehicle |
| CN105730247A (en) * | 2014-12-12 | 2016-07-06 | 北汽福田汽车股份有限公司 | Braking energy feedback control method and system |
| CN106627166A (en) * | 2016-10-31 | 2017-05-10 | 中山大学 | Generation method of regenerative braking policies of double-shaft drive pure electric vehicle |
| CN108216245A (en) * | 2018-01-15 | 2018-06-29 | 华晨鑫源重庆汽车有限公司 | Vehicle energy feedback method and device |
| CN113968205A (en) * | 2021-12-01 | 2022-01-25 | 吉林大学 | Composite braking fault-tolerant control method based on multi-axis electrically driven vehicle and vehicle |
| CN115891681A (en) * | 2023-01-06 | 2023-04-04 | 中国第一汽车股份有限公司 | Control method for coordinating mode switching and brake recovery and related device |
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| CN1631693A (en) * | 2005-01-19 | 2005-06-29 | 清华大学 | Series connection type brake system of hybrid power vehicle |
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| CN105658463A (en) * | 2013-10-10 | 2016-06-08 | 日产自动车株式会社 | Control device for four-wheel drive electric vehicle |
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| CN106627166A (en) * | 2016-10-31 | 2017-05-10 | 中山大学 | Generation method of regenerative braking policies of double-shaft drive pure electric vehicle |
| CN108216245A (en) * | 2018-01-15 | 2018-06-29 | 华晨鑫源重庆汽车有限公司 | Vehicle energy feedback method and device |
| CN113968205A (en) * | 2021-12-01 | 2022-01-25 | 吉林大学 | Composite braking fault-tolerant control method based on multi-axis electrically driven vehicle and vehicle |
| CN115891681A (en) * | 2023-01-06 | 2023-04-04 | 中国第一汽车股份有限公司 | Control method for coordinating mode switching and brake recovery and related device |
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| CN102897041B (en) | 2015-10-28 |
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