The invention discloses an electric vehicle braking method and system and an electric vehicle, and the method comprises the following steps: in response to the triggering of a brake pedal of the electric vehicle, judging whether a push rod displacement sensor of the electric vehicle fails or not; if it is judged that the push rod displacement sensor fails, target braking torque and target braking deceleration are determined according to the current vehicle speed of the electric vehicle and the main cylinder pressure; and according to the target braking torque and the target braking deceleration, a motor of the electric automobile is controlled to build pressure on an electronic booster of the electric automobile, so that the electric automobile is braked through the electronic booster. By means of the method, the problems that when the push rod displacement sensor fails, the motor cannot assist power, consequently, braking force is insufficient, and serious vehicle braking potential safety hazards exist are solved.
本申请公开了一种电动汽车制动方法、系统及电动汽车,其中,方法包括如下步骤:响应于电动汽车的制动踏板被触发,判断电动汽车的推杆位移传感器是否失效;若判断推杆位移传感器失效,则根据电动汽车的当前车速以及主缸压力确定目标制动力矩和目标制动减速度;根据目标制动力矩和目标制动减速度控制电动汽车的电机对电动汽车的电子助力器进行建压,以通过电子助力器对电动汽车进行制动。通过上述的方法,解决了在推杆位移传感器失效时,电机无法助力导致制动力不足,存在严重的车辆制动安全隐患的问题。
Electric vehicle braking method and system and electric vehicle
一种电动汽车制动方法、系统及电动汽车
2023-12-05
Patent
Electronic Resource
Chinese
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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