Engine control method and system, medium, controller and vehicle

The invention relates to the technical field of engine control, in particular to an engine control method and system, a medium, a controller and a vehicle. When the target excess air coefficient changes, whether the engine output torque step can be caused by responding to the change of the target excess air coefficient or not is judged; if the target excess air coefficient change is responded, the engine output torque step cannot be caused, the target excess air coefficient change is allowed to be responded, and the engine is coordinated to change the current excess air coefficient. Different from an existing engine control method with engine performance optimization as the target, the method can effectively solve the step problem generated by the output torque of the engine when the current excess air coefficient change is coordinated, has better market prospects, and is easy to operate and implement. 本发明涉及发动机控制技术领域，特别涉及一种发动机控制方法、系统、介质、控制器及车辆。当目标过量空气系数发生变化时，判断响应目标过量空气系数变化是否会引起发动机输出扭矩阶跃；若响应目标过量空气系数变化，不会引起发动机输