The invention relates to a diagnosis method of a brake lamp switch of an electric passenger vehicle. The diagnosis method comprises the steps of collecting vehicle driving parameter information; acquiring conduction states of a brake lamp loop and a cruise loop; detecting pressure of a brake pipeline and comparing the pressure with a preset pipeline pressure threshold value; when the pressure of the brake pipeline is larger than the pipeline pressure threshold value and the vehicle does not start automatic parking, if the brake lamp loop and the cruise loop are both disconnected, judging thatthe brake lamp switch breaks down; otherwise, adopting a first fault diagnosis method to diagnose the fault of the brake lamp switch. The method has the advantages that the brake lamp switch fault diagnosis is performed by comprehensively considering the pipeline pressure, vehicle setting, a vehicle speed, a steering angle and a brake stroke, a diagnosis result is accurate, and false alarm is noteasy to occur.
本发明涉及一种电动乘用车制动灯开关诊断方法,诊断方法包括:采集车辆行驶参数信息;获取制动灯回路和巡航回路的导通状态;检测制动管路压力并与预设的管路压力阈值进行比较;当制动管路压力大于管路压力阈值且车辆未开启自动驻车时,若制动灯回路和巡航回路均为断开,则判定制动灯开关故障;否则,采用第一故障诊断方法进行制动灯开关故障诊断。本发明的优点是:综合考虑管路压力、车辆设置、车速、转向角度和刹车行程来进行制动灯开关故障诊断,诊断结果准确,不易误报。
Diagnosis method of brake lamp switch of electric passenger vehicle
一种电动乘用车制动灯开关诊断方法
2020-11-20
Patent
Electronic Resource
Chinese
Brake lamp switch detection method and system, controller, and brake lamp switch
European Patent Office | 2020
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