Failure protection method and system based on brake-by-wire

The invention discloses a failure protection method and system based on brake-by-wire. The method comprises the steps that whether the power assisting state of a vehicle is abnormal or not is judged according to multiple parameters related to brake; and when the power assisting state of the vehicle is abnormal, different auxiliary braking torques are applied to parking braking according to the vehicle speed, the pressure of the braking main cylinder and the abnormal power assisting state of the current vehicle, so that the loss of the braking efficiency during power assisting of the vehicle is reduced. By means of the system and method, whether the power assisting state of the vehicle is abnormal or not can be accurately distinguished, parking braking is correspondingly applied on the basis of the actual situation of the vehicle, and vehicle accidents caused by braking efficiency failure are reduced. 本发明公开了一种基于线控制动的失效保护方法和系统，包括根据与制动相关的多个参数判断车辆的助力状态是否异常；当车辆助力状态异常时，根据车速、制动主缸压力和当前车辆所处的助力异常状态，对驻车制动施加不同的辅助制动力矩，以降低