The invention discloses an electric vehicle steep slope slow descent control method and system. The method comprises the following steps: a vehicle control unit judges whether a steep slope slow descent function is started or not; if yes, the vehicle control unit judges whether a vehicle is in a starting state or not; if the vehicle is in the starting state, the vehicle control unit receives a gear state signal sent by a gear controller, a slope signal sent by a slope sensor, an acceleration request signal sent by an accelerator pedal, a brake request signal sent by a brake pedal and a vehiclespeed signal sent by an electronic stability control system; the vehicle control unit judges whether each signal is a respective preset value or not; if yes, the vehicle control unit collects the current vehicle speed and sets the current vehicle speed as a target vehicle speed of steep slope slow descent; and the vehicle control unit calculates the required torque of the vehicle according to thetarget vehicle speed and the current slope value, so that the vehicle speed is maintained at the target vehicle speed. According to the invention, different downhill speeds can be provided accordingto the requirements of drivers, and the flexibility of slow descent of the electric vehicle on an abrupt slope is improved.
本发明公开了一种电动汽车陡坡缓降控制方法及系统,该方法包括:整车控制器判断陡坡缓降功能是否开启;若是,则整车控制器判断车辆是否处于启动状态;若车辆处于启动状态,则整车控制器分别接收挡位控制器发送的挡位状态信号、坡度传感器发送的坡度信号、加速踏板发送的加速请求信号、制动踏板发送的制动请求信号、电子稳定控制系统发送的车速信号;整车控制器各信号是否均为各自的预设值;若是,则整车控制器采集当前车速,并设置为陡坡缓降的目标车速;整车控制器根据目标车速和当前坡度值计算整车需求扭矩,使车辆的车速维持在目标车速。本发明能够根据驾驶者的需求提供不同的下坡车速的效果,提升了电动车陡坡缓降的灵活性。
Electric vehicle steep slope slow descent control method and system
电动汽车陡坡缓降控制方法及系统
2020-05-22
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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