Method for controlling end of travel for electric power-assisted steering

A method for controlling end of travel, for a steering rack of a motor vehicle with electric power assistance, a method in which the maximum intensity of the electric current flowing through the electric power assistance motor is controlled to adapt a power assistance torque, at the approach of the end of travel positions of the rack, so as to reduce the shocks and noise when the steering system reaches a steering end-of-travel stop, said method comprising a specific function including:

• getting a distance information of the rack with respect to the end of travel stop,
• getting an actual rotation speed information of the steering wheel,
• identifying a maximum allowed acceleration for the rotation of the steering wheel, said maximum allowed acceleration being such that, in view of the distance information of the rack and the actual rotation speed information of the steering wheel, the rotation speed of the steering wheel will be lower than a required maximal speed when arriving at the end-of-travel stop, in respecting a target deceleration value or a target deceleration profile, determining a maximum power assistance torque from the maximum allowed acceleration;
• and controlling the power assistance torque so as to target the deceleration value or profile of the rotation of the steering wheel.