The invention provides a brake control method of an electric automobile and the electric automobile, and belongs to the technical field of brake control of the electric automobile. According to the method, the current vehicle speed and the current pedal opening degree of the electric vehicle are obtained, the target deceleration corresponding to the current vehicle speed and the current pedal opening degree is extracted according to the corresponding relation among the pedal opening degree, the vehicle speed and the target deceleration which are obtained in advance, and the target deceleration serves as the control target of braking control. Vehicle sliding resistance is calculated according to the current vehicle speed; acquiring the gradient of the current road section of the electric vehicle, and calculating ramp resistance according to the gradient; and then according to the vehicle sliding resistance, the ramp resistance and the target deceleration value, the request braking torque is calculated, and the driving motor is controlled to output the request braking torque. By the adoption of the method, the target deceleration serves as the braking control target, the request braking torque required to be output by the driving motor is calculated in a self-adaptive mode according to the gradient of the road section where the target deceleration is located, the driving motor outputs the request braking torque, and the driving feeling is optimized.
本发明提供了一种电动汽车的制动控制方法及电动汽车,属于电动汽车制动控制技术领域。通过获取电动汽车的当前车速和当前踏板的开度,根据预先获取的踏板开度、车速与目标减速度之间的对应关系,提取出对应当前车速和当前踏板开度的目标减速度,将目标减速度作为制动控制的控制目标,并根据当前车速计算车辆滑行阻力;还获取电动汽车当前所在路段的坡度,根据坡度计算坡道阻力;然后根据车辆滑行阻力、坡道阻力和目标减速度值,计算请求制动扭矩,控制驱动电机输出请求制动扭矩。采用本发明,通过将目标减速度作为制动控制目标,并根据所在路段的坡度自适应计算请求驱动电机输出的请求制动扭矩,驱动电机采用请求制动扭矩输出,优化了驾驶感受。
Brake control method of electric automobile and electric automobile
一种电动汽车的制动控制方法及电动汽车
2023-06-13
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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