The invention relates to the field of motor control, and discloses a control method based on a hill descent control (HDC) system, the HDC system and an electric vehicle. The control method comprises:judging the state of the HDC system; under the condition that the HDC system is in a triggered state, determining a target braking torque based on a current speed of the electric vehicle and a targetspeed; comparing a target braking torque with a current maximum braking torque of a motor; and controlling the electric vehicle to brake through a motor feedback brake mode or a motor feedback and hydraulic hybrid brake mode according to a comparison result, and determining that the HDC system is in a trigger state under the condition that a trigger condition is met, wherein the HDC system is in astandby state, the depth signals of the accelerator pedal and the brake pedal are 0, the vehicle speed is within a preset speed range, and the electric vehicle is in an acceleration downhill state. According to the control method, the gradient sensor is not needed to collect the gradient, so that the abnormal HDC function caused by the abnormal signals collected by the gradient sensor can be prevented, and the stability of the braking system and the braking safety of the whole vehicle are greatly improved.
本发明涉及电机控制领域,公开一种基于陡坡缓降控制(HDC)系统的控制方法、HDC系统及电动车。该控制方法包括:判断HDC系统状态;在HDC系统处于触发状态情况下,基于电动车当前车速及目标车速,确定目标制动力矩;比较目标制动力矩与电机当前最大制动力矩;及根据比较结果,控制电动车通过电机回馈制动模式或电机回馈与液压混合制动模式进行制动,在满足触发条件情况下,确定HDC系统处于触发状态:HDC系统处于待命状态;及油门踏板与制动踏板的深度信号为0、车速处于预设速度范围且电动车处于加速下坡状态。该控制方法不需坡度传感器采集坡度,从而可防止因坡度传感器所采集的信号异常而导致HDC功能异常,大大提高制动系统稳定性及整车制动安全性。
Control method and control system based on hill descent control system and electric vehicle
基于陡坡缓降控制系统的控制方法、控制系统及电动车
2020-07-07
Patent
Electronic Resource
Chinese
European Patent Office | 2015
|HILL DESCENT CONTROL SYSTEM FOR A HYBRID/ELECTRIC VEHICLE
European Patent Office | 2021
|HILL DESCENT CONTROL SYSTEM FOR A HYBRID/ELECTRIC VEHICLE
European Patent Office | 2021
|HILL DESCENT SYSTEM FOR VEHICLE AND CONTROL METHOD THEREOF
European Patent Office | 2020
|Hill descent system for vehicle and control method thereof
European Patent Office | 2021
|