The invention provides a hill starting assisting method and device, and relates to the technical field of pure electric vehicles. The method comprises the following steps: firstly obtaining an inclination angle of a hill where a target vehicle is located and current state data, judging whether the target vehicle needs to enter a hill starting assisting mode or not, when the vehicle enters the hillstarting assisting mode, calculating a target torque according to the vehicle parameters and the inclination angle of the target vehicle, using the target torque as an initial torque to control the output torque of a motor system to ensure the vehicle which just enters the hill starting auxiliary mode is prevented from sliding on the hill then, and adjusting the target torque according to the rotating speed and the rotating direction of the motor to ensure that the vehicle can be stably started on the hill. According to the method, the advantage that the driving motor of the pure electric vehicle can output large driving force under the low-rotating-speed working condition can be brought into play, meanwhile, the deployment cost of the hill starting assisting system is low, the risk thatthe vehicle started on the hill slides backwards or collides can be reduced, and the driving safety is guaranteed.
本申请提供一种坡起辅助方法及装置,涉及纯电动汽车技术领域,该方法先获取目标车辆所处坡道的倾斜角度以及当前状态数据,以便于判断目标车辆是否需要进入坡起辅助模式,当车辆进入坡道起步辅助模式时根据目标车辆的车辆参数和倾斜角度先算出目标扭矩,并将该目标扭矩作为初始扭矩对电机系统的输出扭矩进行控制,以保证刚进入坡起辅助模式的车辆不会出现溜坡,然后再根据电机转速以及转动的方向对目标扭矩进行调节,以保证车辆能够实现在坡道上平稳的起步,该方法能够发挥纯电动汽车的驱动电机在低转速工况可输出较大驱动力的优势,同时坡起辅助系统的部署成本较小,且能够降低在坡道上起步的车辆发生后溜或碰撞的风险,保证了驾驶的安全性。
Hill starting assisting method and device
一种坡起辅助方法及装置
2020-08-11
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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