Auxiliary steering device of a vehicle axle

Auxiliary steering device (1) of a vehicle axle, in particular a front, leading or trailing axle (4) of a commercial vehicle, whose wheels (6, 7) through a forced coupling achieved tie rod (20) are jointly steerable, with at least one with a control and / or regulating device (42) working cylinder which is operatively connected (16) as a steering actuator and with at least one signal to the actual steering angle of one or more wheels (6) of a side of the axle (8) to the control and / or regulating device (42) providing sensor (44), said at least one further, signals for the actual steering angle of one or more wheels (7) of the other side of the axle (10) providing sensor (46) is provided, the signals from the control and / or regulating device (42 ) related to the signals of a sensor (44) into a single, on the axis (4) actual steering angle can be netted, characterized in that the control and / or regulating device (42) by processing these signals, and in addition to this incoming signals respectively determined target steering angle S