Abstract: A method for active actuation of a servo valve assembly in an electrohydraulic vehicle steering system includes the following method steps: a) a steering-wheel angle and a steering wheel angular velocity are determined as input variables; b) a pinion angle and a pinion angular velocity are determined as further input variables; c) a setpoint is specified for the steering-wheel angle; d) the input variables and the steering-wheel angle setpoint each are multiplied by an amplification parameter; e) by summing the amplified input variables and the amplified steering-wheel angle setpoint, a control variable is determined for a servo valve actuator which actuates a valve component of the servo valve assembly; f) the servo valve actuator is actuated corresponding to the control variable.

Abstract: A method of determining an assist torque set-point value for an electric motor driven power steering system that is a function of a steering torque, a vehicle speed and an angular velocity of the steering system motor.

Abstract: In a method for controlling an electric steering assistance system having an electric motor to provide an auxiliary torque for a steering arrangement, a steering wheel torque, which is applied by the driver, is measured. The measured steering wheel torque signal undergoes high-pass filtering to determine an inertia compensation torque requirement, such that a signal is obtained which is representative of the dynamics of the steering wheel torque signal. The method according to the invention makes possible a modification of the steering wheel torque dynamics which is dependent on the steering angle velocity. An electric steering assistance system having a control arrangement to carry out the method comprises an electric motor to provide an auxiliary torque for a steering arrangement. The control arrangement has a high-pass filter in which the steering wheel torque signal undergoes high-pass filtering.