Patent ID: 6466857
Filing Date: 2002-10-15
Classification: B60T

Abstract:
A method for controlling the traction on a drive surface of drive wheels of a motor vehicle having a vehicle stability enhancement system of the type becoming active when a vehicle yaw rate error is sensed for providing braking control of individual wheels of the motor vehicle to reduce the vehicle yaw rate error below a predetermined value, the method comprising the steps:deriving a target velocity from a vehicle longitudinal speed and one or more of a vehicle longitudinal acceleration, a vehicle lateral velocity and a vehicle turn curvature; estimating a coefficient of friction between the vehicle wheels and the drive surface; and responsive to activity of the vehicle stability enhancement system in reducing a vehicle yaw rate error, bounding the target velocity between a maximum target velocity value and a minimum target velocity value, at least one of the maximum target velocity value and the minimum target velocity value being derived from the estimated coefficient of friction.