Patent ID: 8187131

Claim:
A torque transmitting system for an all-wheel drive motor vehicle, comprising: a front differential drivingly connected to a front set of wheels; a rear differential drivingly connected to a rear set of wheels; a propulsion distribution device drivingly connected to said front and rear differentials, wherein the propulsion distribution device is selected from the group consisting of two interaxle clutches and a self-lockinq Torsen differential; an electronic control device programmed to actuate the propulsion distribution device so as to increase the ratio of torque transmitted to the front differential relative to the torque transmitted to the rear differential in response to detection of an oversteerinq tendency of the vehicle and to decrease the ratio of torque transmitted to the front differential relative to the torque transmitted to the rear differential in response to detection of an understeerinq tendency of the vehicle; an overriding drive cooperable with said rear differential and selectively actuated by a set of clutches, operatively connected to said set of rear wheels, operable to alter the ratios of torque transmitted to said set of rear wheels, such that when the motor vehicle is driven through a curve having a predetermined radius a rotational speed difference between the rear wheels is directionally reversed.