The invention relates to an electric vehicle braking energy distribution method. The method comprises the following steps: (1) obtaining the current target braking requirement of a vehicle; (2) determining a front and rear axle braking force distribution curve, and obtaining front wheel braking force and rear wheel braking force according to the front and rear axle braking force distribution curve; (3) establishing a conversion relationship between the pressure of the main cylinder and the recovery torque of each wheel motor; (4) converting the pressure of the main cylinder into hydraulic mechanical braking torque; and (5) according to the current target braking requirement and the braking energy recovery stage state, adjusting the relation between the recovery torque of each wheel motor and the hydraulic mechanical braking torque. Efficient recovery of braking energy can be achieved, and smoothness of the braking process is guaranteed.
本发明涉及一种电动汽车制动能量分配方法,包括:步骤(1):获取车辆的当前目标制动需求;步骤(2):确定前后轴制动力分配曲线,根据所述前后轴制动力分配曲线获取前轮制动力和后轮制动力;步骤(3):建立主缸压力与各个轮电机回收力矩之间的转化关系;步骤(4):将所述主缸压力转化为液压机械制动力矩;步骤(5):根据所述当前目标制动需求和制动能量回收阶段状态,调整各个轮电机回收力矩与液压机械制动力矩的关系。本发明可以实现制动能量的高效回收,保证制动过程平顺。
Electric vehicle braking energy distribution method
一种电动汽车制动能量分配方法
2021-03-19
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
Electric vehicle braking force distribution method and system
European Patent Office | 2020
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