Patent ID: 7337053
Filing Date: 2008-02-26
Classification: B60K,B60W

Abstract:
1. A control system for a vehicle having first and second axles, comprising: a coupling apparatus adapted to distribute torque between the first and second axles; a traction controller for controlling operation of the coupling apparatus from vehicle launch up to a predetermined vehicle speed, the traction controller configured to engage the coupling apparatus in a first vehicle operating state according to at least one vehicle operating parameter indicative of a low traction operating condition and to further control engagement of the coupling apparatus in a second vehicle operating state during the low traction operating condition according to a difference between an actual vehicle yaw rate and a predetermined target vehicle yaw rate; and wherein the traction controller is configured to engage the coupling apparatus according to a desired coupling applied torque signal that is based on a modified normal coupling applied torque signal, the desired coupling applied torque signal is equal to the normal coupling applied torque signal multiplied by a modifier, the modifier including in its numerator the difference between a predetermined maximum yaw rate difference and the multiplication of a deadband and the difference between the actual vehicle yaw rate and the predetermined target vehicle yaw rate, and the modifier including in its denominator the predetermined maximum yaw rate difference.