Patent ID: 8103411

Claim:
A method for controlling oversteer in a vehicle equipped with an electrically assisted power steering system, the method comprising the steps of: inputting measured vehicle states to a controller in the steering system; generating a target yaw signal; measuring an actual yaw acceleration; comparing the target yaw signal and the actual yaw acceleration signal to determine an oversteer condition; generating an oversteer signal upon determination of the oversteer condition; processing the oversteer signal to produce a multiplier; applying a transfer function to the actual yaw acceleration signal to derive a nominal yaw damping torque; scaling the nominal yaw damping torque using predetermined vehicle state signals to derive a scaled nominal yaw damping torque; applying the multiplier to the scaled nominal damping torque to derive an added torque signal; and summing the added torque signal with a torque assist signal for the electrically assisted power steering system, thereby controlling oversteer in the vehicle.