The invention discloses a control method and device for braking safety of an electric vehicle passing through a deceleration strip road surface, and the method comprises the steps: obtaining an estimated value of a road surface adhesion coefficient according to a motor braking torque and a wheel speed change rate of the electric vehicle, and determining a road surface scene which comprises a low-adhesion road surface and a high-adhesion road surface, according to a preset rotating speed change rate threshold value, a braking scene is determined, the braking scene comprises a speed bump passing road surface and a high-adhesion non-speed bump passing road surface, and when it is determined that the braking scene is the speed bump passing road surface, the motor braking torque is recovered within the target duration after the anti-lock braking system is reset, and the motor braking torque is recovered within the target duration after the anti-lock braking system is reset. The target time length is smaller than the time length for recovering the braking torque of the motor after the accelerator is stepped on. According to the method provided by the invention, optimal braking control responding to different road conditions can be realized.
本申请公开了一种电动车过减速带路面制动安全的控制方法及装置,根据电动车的电机制动扭矩与轮速变化率,得到路面附着系数的估计值,确定路面场景,路面场景包括低附路面和高附路面,其中,确定路面场景为高附路面时,根据预先设定的转速变化率阈值,确定制动场景,制动场景包括过减速带路面和高附非过减速带路面,其中,确定制动场景为过减速带路面时,制动防抱死系统复位后目标时长内恢复电机制动扭矩,目标时长小于踩下油门之后所述电机制动扭矩恢复的时长。根据本申请提供的方法,能够实现对不同路面条件进行响应的最优制动控制。
Control method and device for braking safety of electric vehicle passing through deceleration strip road surface
一种电动车过减速带路面制动安全的控制方法及装置
2023-10-24
Patent
Elektronische Ressource
Chinesisch
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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