ALL-WHEEL STEERING

摘要

An all-wheel steering control or regulating device for vehicle rear wheel steering, which is motor-driven and permits any desired predeterminable steering angles of the rear wheels as a function of the steering angles of the front wheels or other parameters. In the event of error detection in the system, a drive motor of the rear wheel steering is switched to an inoperative condition and a hydraulic positive coupling between front wheel steering and rear wheel steering is simultaneously established by means of separate piston-cylinder units, with the result that the rear wheels are steered simultaneously with the front wheels.