Abstract: The invention concerns a method for detecting a transition (4?) in a noisy signal, which involves submitting a noisy signal (?Signal) carrying an item of information used for managing the power steering, said method comprising a derivation sub-step (a1), which involves evaluating the time derivative of the noisy signal (?Signal/?t), following by a selective filtering sub-step (a2) which involves comparing said time derivative of the noisy signal (?Signal/?t) with a predefined variation threshold (Spic) in order to detect the appearance of a derivative peak (7), greater than said variation threshold (Spic), evaluating the holding time (dpic) of said derivative peak, during which the time derivative of the noisy signal (?Signal/?t) is held above said variation threshold (Spic), and checking if said peak holding time (Spic) reaches or exceeds a predefined minimum time threshold (d0).

Abstract: A method for determining an absolute power steering reference position, which includes: a step of acquiring a first edge position corresponding to a first edge of a first index pulse generated when the movable steering member passes an indexed position in a first movement direction; a step of acquiring a second edge position corresponding to a second edge of a second index pulse generated when the movable steering member passes the same indexed position in a second movement position opposite the first movement direction; and a step of calculating a reference position, during which an power steering reference position is calculated from an average of the first edge position and the second edge position.

Abstract: The present invention concerns a method for determining the position of a movable steering member (1, 2, 3) belonging to a steering mechanism (4) of a vehicle that comprises at least a first movable member (1), such as a shaft (1) of an assistance motor (M), and a second movable member (2), such as a rack (2), which cooperate with each other by means of at least one first link (L1), said method comprising a step (a) that involves measuring the position (?1) of the first member (1), then a step (b) that involves calculating the instantaneous position (?2) of the second member (2) from said position of the first member (?1), and a correction step (d) during which the calculation of the position (?2) of the second member (2) is adapted, taking into consideration the offset (???) in the position of the second member (2) that results from the elastic deformation of the first link (L1) under the force (C1) transmitted by the latter.

Abstract: A method for securing the assistance torque (15) supplied by an electric assistance motor (8) in a motor vehicle power steering system includes the steps of: estimating the force on the steering system rack from the torque exerted by the driver on the steering wheel (2), from the assistance torque (15), and optionally from other parameters such as the speed of the electric assistance motor; comparing a target assistance torque with an authorized assistance range, defined with respect to the estimated rack force (17) at any moment, and in the event the target assistance torque is maintained above predefined limits for a predefined duration, correcting and optionally interrupting the power steering.

Abstract: The invention relates to a method for securing the assistance torque (15) supplied by an electric assistance motor (8) in a motor vehicle power steering system, the securing method being characterized in that it includes the steps of: estimating the force on the steering system rack from the torque exerted by the driver on the steering wheel (2), from the assistance torque (15), and optionally from other parameters such as the speed of the electric assistance motor; comparing a target assistance torque with an authorized assistance range, defined with respect to the estimated rack force (17) at any moment, and in the event the target assistance torque is maintained above predefined limits for a predefined duration, correcting and optionally interrupting the power steering.

Abstract: The method consists of, when the instantaneous speed of the vehicle is greater than a pre-determined threshold: identifying that the vehicle travels in a straight line without torque exerted on the steering wheel; if the prior condition is met, determining an average residual torque for the steering wheel by calculating a sliding scale of measures of torque on the steering wheel; calculating a correction, if the average residual torque on the steering wheel is greater than a pre-determined minimum torque, which is proportional to the average residual torque to be applied to the torque measures on the steering wheel; calculating effective correction limited in terms of the speed of variation and amplitude in relation to the correction applied to the measures of torque on the steering wheel, said corrected measures being subsequently treated by the electronic calculator in order to control the electronic booster motor.

Abstract: The method consists of, when the instantaneous speed of the vehicle is greater than a pre-determined threshold: identifying that the vehicle travels in a straight line without torque exerted on the steering wheel; if the prior condition is met, determining an average residual torque for the steering wheel by calculating a sliding scale of measures of torque on the steering wheel; calculating a correction, if the average residual torque on the steering wheel is greater than a pre-determined minimum torque, which is proportional to the average residual torque to be applied to the torque measures on the steering wheel; calculating effective correction limited in terms of the speed of variation and amplitude in relation to the correction applied to the measures of torque on the steering wheel, said corrected measures being subsequently treated by the electronic calculator in order to control the electronic booster motor.