Abstract: A drive control apparatus and method for a vehicle having an internal combustion engine driving main drive wheels, an electric motor driving auxiliary drive wheels, and a clutch disposed between the electric motor and the auxiliary drive wheels. The drive control apparatus includes a drag motion detection section configured to detect that the electric motor undergoes a drag motion due to idle torque of the clutch, and a reverse torque control section configured to control torque of the electric motor in a direction reverse to a direction of the drag motion of the electric motor when the drag motion of the electric motor is detected by the drag motion detection section.

Abstract: A vehicle driving force control apparatus is configured to prevent co-rotation of the motor caused by rotation of a pair of wheels when a clutch connecting the wheels and the motor is released (disconnected). When the clutch is released, the motor is braked by short circuiting the armature. The motor is then braked again by setting the field current of the motor to 0 when the rotational speed of the motor reaches 0. After the clutch is released, a braking-direction field current is applied to the motor in accordance with the decreasing rotational speed of the motor such that the braking force is decreased as the rotational speed of the motor decreases.

Abstract: A drive control apparatus and method for a vehicle having an internal combustion engine driving main drive wheels, an electric motor driving auxiliary drive wheels, and a clutch disposed between the electric motor and the auxiliary drive wheels. The drive control apparatus includes a drag motion detection section configured to detect that the electric motor undergoes a drag motion due to idle torque of the clutch, and a reverse torque control section configured to control torque of the electric motor in a direction reverse to a direction of the drag motion of the electric motor when the drag motion of the electric motor is detected by the drag motion detection section.

Abstract: A vehicle driving force control apparatus is configured to prevent co-rotation of the motor caused by rotation of a pair of wheels when a clutch connecting the wheels and the motor is released (disconnected). When the clutch is released, the motor is braked by short circuiting the armature. The motor is then braked again by setting the field current of the motor to 0 when the rotational speed of the motor reaches 0. After the clutch is released, a braking-direction field current is applied to the motor in accordance with the decreasing rotational speed of the motor such that the braking force is decreased as the rotational speed of the motor decreases.