Patent ID: 6575257
Filing Date: 2003-06-10
Classification: B60L,Y02T

Abstract:
A method for controlling a vehicle drive electric motor for driving a vehicle, the vehicle operating according to a plurality of vehicle drive modes for selection by a vehicle operator including a first vehicle drive mode and a second vehicle drive mode, the vehicle drive electric motor having an output torque which is ordered in accordance with a movement of an accelerator of the vehicle, the method comprising:(a) detecting an actual vehicle moving condition of the vehicle: (b) judging whether or not the actual vehicle moving condition detected in step (a) is in compliance with the first vehicle drive mode when the first vehicle drive mode is ordered by the vehicle operator, (c) decreasing an actual output torque of the vehicle drive electric motor when step (b) judges that the actual vehicle moving condition is not in compliance with the is vehicle drive mode, to less than the output torque of the vehicle drive electric motor ordered in accordance with the movement of the accelerator; and (d) thereafter making the actual output torque of the vehicle drive electric motor substantially equal to the output torque of the vehicle drive electric motor ordered in accordance with the movement of the accelerator after the actual vehicle moving condition becomes in compliance with the second vehicle drive mode, the second vehicle drive mode is ordered by the vehicle operator for cancelling the first vehicle drive mode, and the output torque of the vehicle drive electric motor ordered in accordance with the movement of the accelerator is decreased to not more than the decreased actual output torque of the vehicle drive electric motor.