Vehicle drive force control apparatus
AssigneeNissan Motor Co., Ltd.
InventorsHidemichi Tokunou, Satoru Chuujou, Yasuo Matsunaga
Life of this patent
Estimating the term…
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.
Claims12
A vehicle drive force control apparatus comprising:
- a main drive source arranged and configured to drive a main drive wheel;
- an electric motor arranged and configured to drive a subordinate drive wheel;
- a connecting device installed in a torque transfer path between the electric motor and the subordinate drive wheel, the connecting device being configured and arranged to selectively connect and disconnect the electric motor to and from the subordinate drive wheel;
- and
- a braking device arranged and configured to stop rotation of the electric motor after the electric motor is disconnected from the subordinate drive wheel by the connecting device and while the electric motor remains disconnected from the subordinate drive wheel.
A vehicle drive force control apparatus comprising:
- main drive means for rotating a main drive wheel;
- electric motor means for rotating a subordinate drive wheel;
- connecting means for selectively connecting and disconnecting the electric motor to and from the subordinate drive wheel;
- and
- braking means for stopping rotation of the electric motor means after the electric motor means is disconnected from the subordinate drive wheel by the connecting means and while the electric motor remains disconnected from the subordinate drive wheel.
A method of controlling a vehicle drive force control apparatus comprising:
- supplying a rotational drive force for rotating a main drive wheel;
- supply electric power to an electric motor for rotating a subordinate drive wheel;
- selectively connecting and disconnecting the electric motor to and from the subordinate drive wheel;
- and
- stopping rotation of the electric motor after the electric motor is disconnected from the subordinate drive wheel and while the electric motor remains disconnected from the subordinate drive wheel.
Dependencies are inferred from the claim text.