Steering system for a trailing axle of a vehicle

A steering system for a trailing or a leading axle of a vehicle, comprising:

• a steering angle sensor for measuring a steering angle of wheels of a front axle of the vehicle,
• a driving speed sensor for measuring a driving speed of the vehicle,
• an electric motor (1.2), which drives a hydraulic pump (2),
• a working cylinder (11) for steering wheels of the trailing axle, which working cylinder is connected to the hydraulic pump (2) via feed lines (7 and 7.1),
• a control device (1.1) which receives data from the steering angle sensor and the driving speed sensor, wherein the control device uses the data to determine a trailing angle of wheels on the trailing axle of the vehicle and activates the electric motor accordingly, and wherein
• the working cylinder (11) has a central position borehole (11.3), via which hydraulic fluid can be discharged from the working cylinder (11) and, in a straight-ahead position of the wheels of the trailing axle, a piston closing the central position borehole (11.3),
• the working cylinder (11) is connected to return flow valves (10 and 10.1), via which hydraulic fluid can flow back into a tank (6),
• the central position borehole (11.3) of the working cylinder (11) is connected to a central position valve (12), via which hydraulic fluid can flow back into a tank (6), and
• the return flow valves (10 and 10.1) and the central position valve (12) are poppet valves.