Abstract: The invention relates to a method to assist with turning a vehicle power assisted steering wheel, during which method a return setpoint (final return setpoint) quantifying a return force intended to be applied to said steering wheel in order to assist with returning said steering wheel to a predetermined central position is formulated, said method involving at least one step (a) of determining longitudinal acceleration during which step the instantaneous longitudinal acceleration of the vehicle is evaluated, followed by a step (b) of adapting the return setpoint during which step the steering wheel return setpoint is adjusted according to said instantaneous longitudinal acceleration so as to increase the intensity of the return force if said longitudinal acceleration increases, and thus notably compensate for the lessening of the natural centring effect that is caused by the lightening of the steering under acceleration conditions.

Abstract: The invention concerns a control method for a power-assisted steering module, said method comprising a step (a) of assessing the steering wheel torque which involves obtaining an indicator signal representative of the intensity of the steering wheel torque (Cvolant) exerted by the driver on the steering wheel, a monitoring step (b) which involves comparing the indicator signal, representative of the intensity of the steering wheel torque (Cvolant), to a pre-defined alert threshold (C1), then, if said indicator signal becomes higher than or equal to said alert threshold (C1), a step (c) of reducing the assistance which involves reducing the intensity of the assistance torque (Cassist) provided by the assistance motor (12), such that the sum of the steering wheel torque (Cvolant) and the assistance torque (Cassist) remains lower than or equal to a pre-defined critical operating torque, in order to preserve the steering tie-rods from plastic deformation.

Abstract: The invention relates to a method to assist with turning a vehicle power assisted steering wheel, during which method a return setpoint (final return setpoint) quantifying a return force intended to be applied to said steering wheel in order to assist with returning said steering wheel to a predetermined central position is formulated, said method involving at least one step (a) of determining longitudinal acceleration during which step the instantaneous longitudinal acceleration of the vehicle is evaluated, followed by a step (b) of adapting the return setpoint during which step the steering wheel return setpoint is adjusted according to said instantaneous longitudinal acceleration so as to increase the intensity of the return force if said longitudinal acceleration increases, and thus notably compensate for the lessening of the natural centring effect that is caused by the lightening of the steering under acceleration conditions.