Patent ID: 8731776
Filing Date: 2014-05-20
Classification: B62D

Abstract:
1. A method for controlling an electric assistance motor in a motor vehicle electric power assisted steering system, the method comprising: measuring the steering torque exerted by the driver of the vehicle, calculating or measuring the assistance torque delivered by the electric assistance motor, calculating or measuring the angular position of the electric assistance motor, providing a point signal from a sensor, known as an “index” sensor, for certain angular positions of the steering system, determining a first steering angle signal as a function of the calculated or measured assistance force or torque delivered by the electric assistance motor and optionally of the measured steering force or torque exerted by the driver on the steering wheel, determining a second steering angle signal as a function of the calculated or measured angular position of the electric assistance motor, determining a third signal of “index” type, that is to say emitted for certain angular positions of the steering system, determining a convergence signal for the convergence of the steering angle calculations, and determining a confirmation signal for confirming the calculation of the steering angle, wherein the convergence signal is produced by the third signal to indicate a level of confidence regarding the estimate of the steering angle.