The invention discloses a climbing condition recognition method for a hybrid electric vehicle, and the method comprises the following steps: judging the ramp state of a whole vehicle according to a slope signal after the whole vehicle is powered by a strong current; if the gradient is greater than or equal to a set gradient of the climbing working condition flag bit, entering the step 2); if not,executing according to a conventional hybrid power control program; judging the running state of the vehicle, wherein if the vehicle is in a pure electric and static state, the engine is not started,and the engine is started when the vehicle speed reaches about 10 kph, if the engine is in the hybrid state at the moment, the engine is controlled not to be shut down, and meanwhile, a battery is ensured to be in a quick charging state through a calibrated engine torque, so that the SOC is quickly charged to more than 0.5; by the adoption of the technical scheme, the problem that in the conventional driving working condition, when the hybrid electric vehicle climbs a long slope, the power battery continuously discharges, feeding of the power battery is caused, and then motor torque output isaffected can be effectively solved, and potential safety hazards are eliminated.
本发明公开了一种混合动力汽车的爬坡工况识别方法,包括以下步骤:整车上强电后,根据坡度信号判断整车的坡道状态;如果坡度大于等于爬坡工况标志位的设定坡度,则进入步骤2);如果否,则按照常规的混合动力控制程序执行;判断车辆的运行状态;若为纯电、静止状态,则发动机不起动,待车速达到10kph附近时启动发动机;若此时为混动状态,则控制发动机不熄火,同时通过标定的发动机扭矩,保证电池处于快速充电状态,使SOC快速充到0.5以上;采用上述技术方案,可有效改善常规驾驶工况中出现的混合动力汽车在爬长坡时动力电池持续放电导致动力电池馈电进而影响电机扭矩输出的问题,消除安全隐患。
Climbing condition recognition method of hybrid electric vehicle
一种混合动力汽车的爬坡工况识别方法
2021-03-09
Patent
Electronic Resource
Chinese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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