Method for detecting reversal in the steering direction by monitoring the torque supplied by power steering motor, application of said method to friction evaluation

The invention concerns a method for managing a power steering system, comprising a step (a) of detecting a reversal in the steering direction which involves acquiring a signal, referred to as a motor torque signal (CMot), representative of the assistance force (Cassist) delivered by the power steering motor, then evaluating the time derivative (delta C Mot / delta t) of said motor torque signal, then comparing said time derivative of the motor torque signal to a predefined variation threshold (Spic) in order to detect a derivative peak, greater than said variation threshold (Spic), that indicates a reversal (4) in the steering direction. Said method next comprises a friction evaluation step (b) which involves evaluating the friction from the drop, during the reversal in the steering direction, in a so-called actuation force signal (Caction), which is representative of the total actuation force exerted together on the power steering by the driver and by the power steering motor. 本发明涉及用于管理动力转向系统的方法，包括在转向方向上检测回正