The invention discloses an extended-range electric vehicle engine starting and stopping method and system, and belongs to the field of extended-range electric vehicles. The problem that the NVH level of a whole vehicle is poor when an engine is started can be solved. According to the engine stopping method, the engine is dragged by the generator so that the engine crank connecting rod mechanism can be stopped at the optimal starting position, the whole vehicle control unit outputs a start-stop control function closing instruction signal to the whole vehicle control unit signal receiving module, and the start-stop control function is quitted. Through the engine start-stop control function, when the engine stops, the engine is dragged by the generator to fix the stop position of the engine every time, so that the starting resistance torque of the engine is fixed, the generator can stably drag the engine to the dragging rotating speed according to the starting resistance torque of the engine, and the rotating speed shaking problem of the engine and the generator is solved; therefore, the NVH problem when the engine is started when the whole vehicle is static or runs is solved.
一种增程式电动汽车发动机启停方法和系统,属于增程式电动汽车领域。它能够解决发动机启动整车NVH水平较差的问题。该发动机停止方法,为发电机拖动发动机使发动机曲柄连杆机构停止在最优起动位置,整车控制单元输出起停控制功能关闭指令信号给整车控制单元信号接收模块,退出起停控制功能。通过发动机起停控制功能,在发动机停机时利用发电机拖动使发动机每次的停机位置固定,从而使发动机的起动阻力矩固定,发电机可以根据发动机起动阻力矩稳定拖动发动机至拖动转速,解决发动机和发电机的转速抖动问题,从而解决在整车静止或行驶中起动发动机时的NVH问题。
Method and system for starting and stopping engine of extended-range electric vehicle
一种增程式电动汽车发动机启停方法和系统
2022-07-29
Patent
Electronic Resource
Chinese
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