Torque distribution control system for a four wheel drive motor vehicle.

摘要

A four wheel drive vehicle is provided with a central differential for distributing the output torque of the transmission to the front and rear wheels, a larger proportion of the torque being applied to the rear wheels. A fluid-operated restricting device is provided for restricting the differential operation of the central differential. The slip ratio of the rear wheels is calculated based on rear-wheel speed and vehicle speed. The fluid-operated restricting device is operated in accordance with the slip ratio, in such a manner that differential operation is reduced with an increase of the slip ratio.