Abstract: A method estimates a track rod force which is exerted, in a power steering system with which a vehicle is equipped, on a track rod belonging to a steering mechanism which connects an actuator to a steered wheel which is orientable in the yaw direction and which bears a tyre of which the tread is in contact with the ground, the value of the estimated track rod force being corrected as a function of the longitudinal speed of the vehicle by a force component that models the release of the elastic torsion of the tyre so as to reduce, the estimated track rod force according to the longitudinal speed of the vehicle, when the vehicle transitions from a park situation in which the longitudinal speed of the vehicle is zero to a drive situation in which the longitudinal speed of the vehicle is non-zero.

Abstract: A method estimates a track rod force which is exerted, in a power steering system with which a vehicle is equipped, on a track rod belonging to a steering mechanism which connects an actuator to a steered wheel which is orientable in the yaw direction and which bears a tyre of which the tread is in contact with the ground, the value of the estimated track rod force being corrected as a function of the longitudinal speed of the vehicle by a force component that models the release of the elastic torsion of the tyre so as to reduce, the estimated track rod force according to the longitudinal speed of the vehicle, when the vehicle transitions from a park situation in which the longitudinal speed of the vehicle is zero to a drive situation in which the longitudinal speed of the vehicle is non-zero.

Abstract: The invention relates to a method for managing an assisted steering device (1) for a vehicle (2) comprising a steering wheel (3) on which the driver exerts a manoeuvring effort, termed the “steering wheel torque” (T3), as well as an assistance motor (12) intended to provide an assistance effort (T12), said method comprising a steering wheel torque reconstruction step (a) in the course of which the steering wheel torque (T3) is evaluated, such as is actually exerted by the driver on the steering wheel (3), without calling upon a steering wheel torque sensor (14) specifically dedicated to the measurement of said steering wheel torque, but by reconstructing an information item representative of said steering wheel torque (T3), termed the “estimated steering wheel torque” (T3_estim), on the basis of data termed “external data” (83, 812, 8?3, 8?12) that is gathered outside a specific steering wheel torque sensor (14) such as this and which include the angular position of the steering wheel (83), the angular positi

Abstract: A method for managing an assisted steering device for a vehicle including a steering wheel on which the driver exerts a maneuvering effort (“steering wheel torque”), as well as an assistance motor intended to provide an assistance effort, said method including a steering wheel torque reconstruction step (a) in the course of which the steering wheel torque is evaluated, without calling upon a steering wheel torque sensor specifically dedicated to the measurement of said steering wheel torque, but by reconstructing an information item representative of said steering wheel torque (the “estimated steering wheel torque”), on the basis of data (“external data”) that is gathered outside a specific steering wheel torque sensor and which include the angular position of the steering wheel, the angular position of the shaft of the assistance motor, and the time derivatives of these angular positions.