Recognizing increased friction in a power steering with ball screw

摘要

A motor vehicle (1) with an electrically assisted power steering (9) with ball screw (6) and a sensor (8) which is adapted to detect an acoustic vibration of the steering (9) during a steering angle change and a sensor signal representing the acoustic vibration and to transmit to a control unit (7), wherein the control unit (7) is adapted to compare the sensor signal with a threshold value and to determine a fault condition when the sensor signal is greater than the threshold value, characterized in that the sensor (8) an acceleration sensor of an airbag deployment system (13) of the motor vehicle (1).