Torque control method for drive system of electric vehicle

A method of controlling torque of a drive system of a vehicle, the method comprising:

• determining, by a controller, a total torque command required for driving of the vehicle;
• determining, by the controller, a torque control mode corresponding to a current driving state of the vehicle among a plurality of preset torque control modes and entering the determined torque control mode;
• determining, by the controller, a front-wheel torque command and a rear-wheel torque command according to the entered torque control mode from the determined total torque command;
• and
• controlling, by the controller, a front-wheel motor and a rear-wheel motor of the vehicle in response to the determined front-wheel torque command and the determined rear-wheel torque command,
• wherein the plurality of torque control modes includes:
• a contra-directional distribution mode in an acceleration direction in which the front-wheel torque command is determined to be a maximum front-wheel torque threshold value set as a negative (−) torque value in a regenerative direction and the rear-wheel torque command is determined to be a positive (+) torque value in a driving direction;
• and
• a contra-directional distribution mode in a regenerative direction in which the rear-wheel torque command is determined to be a minimum rear-wheel torque threshold value set as a positive (+) torque value in the driving direction and the front-wheel torque command is determined to be a negative (−) torque value in the regenerative direction.