以某型号油电混合动力客车为例,分析了发动机油门故障产生原因,剖析了发动机油门干扰信号产生机理,确定了电机控制器是引起油门信号波动的主要干扰源。综合考虑整车电气安全及整车电磁兼容性(EMC),采用电机控制器接地的方法和油门信号线并联电容的方法大幅度降低了干扰信号的产生,有效地解决了发动机油门故障问题。 Taking a hybrid electric passenger car of a certain type as an example, the cause of engine throttle failure is analyzed, the generation mechanism of engine throttle interference signal is analyzed, and the motor controller is the main source of interference caused by the throttle signal fluctuation. Taking into account the vehicle electrical safety and vehicle electromagnetic compatibility (EMC), the method of grounding the motor controller and the parallel connection of the throttle signal line have greatly reduced the generation of interference signals and effectively solved the engine throttle failure problem.