Control method for maintaining engine braking effect when an electric vehicle is coasting

The invention discloses a control method for maintaining an engine braking effect when an electric vehicle is coasting, and belongs to the electric vehicle field. The invention develops an electric vehicle coasting braking energy control strategy based on driving perception of a standard vehicle type. The coasting control strategy takes a gasoline internal combustion engine car as the standard model, By testing the rotational speed and torque characteristics of the input shaft of the main reducer in the engine braking state, the electric vehicle has the same speed and braking torque characteristic curve as the standard vehicle when it is coasting, so that the electric vehicle has the same engine braking effect as the standard vehicle. The coasting braking force of electric vehicle is firstly provided by the drive motor. When the brake power of the drive mechanism cannot meet the demand, the remaining braking force is supplemented by hydraulic braking system, and the proportion betweenthe two is controlled by