METHOD FOR ESTIMATING VALUE FOR FRICTION

A method for estimating a value for friction exerted on a power steering system of a vehicle, during turning resulting in the crossing of a straight line angle, said turning being achieved at a substantially uniform speed included within a predefined range, and an angle of a steering wheel included within a predefined range, comprising: a step (1) of acquiring a plurality of vehicle-related data items (d), including at least one value of a force of a power steering motor on a rack and pinion, and a value of a force of the steering wheel on said rack and pinion; a step (4) of estimating the value for friction (f) by averaging the sum of the forces of the steering wheel and the forces of the power steering motor on the rack and pinion. 本发明涉及在转动导致直线角度的交叉期间用于估算施加在车辆的动力转向系统上的摩擦值的方法，所述转动以包括在预定义区间中的基本上均匀的速度和包括在预定义区间中的方向盘角度实施，所述方法包括：-获取多个车辆数据(d)的步骤(1)，所述多个车辆数据包括辅助马达作用在齿条上的作用力的至少一个值以及作用在所述齿条上的方向盘作用力的值，-通过对作用在所述齿条上的方向盘作用力和辅助马达作用力的总和求平均值来估算摩擦值(f)的步骤(4)。