Patent ID: 8423257
Filing Date: 2013-04-16
Classification: B60T,B60W,B62D

Abstract:
1. A method of operating a motor vehicle during a power steering system failure, comprising the steps of: receiving at an electronic control unit yaw rate information from a yaw rate sensor in communication with the electronic control unit of the motor vehicle; receiving at the electronic control unit lateral G information from an acceleration sensor in communication with the electronic control unit; receiving at the electronic control unit steering angle information from a steering angle sensor in communication with the electronic control unit; receiving at the electronic control unit wheel speed information from a set of wheel speed sensors in communication with the electronic control unit; the electronic control unit calculating a driver intended path for the motor vehicle for use immediately following a power steering system failure based upon at least one of the steering angle information, yaw rate information, lateral G information and wheel speed information; the electronic control unit determining a current path of the motor vehicle from one or more of the yaw rate, the lateral G acceleration, the wheel speed information and the steering angle information; the electronic control unit calculating a current deviation from the driver intended path as the difference between the current path of the motor vehicle and the driver intended path; the electronic control unit determining required braking pressures for at least one wheel of the motor vehicle required to move the motor vehicle towards the driver intended path based upon the calculated current deviation from the driver intended path; and controlling at least one brake of the motor vehicle using the required braking pressures to move the motor vehicle on a corrected path that is substantially closer to the driver intended path.