Abstract: 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.

Abstract: A steering control system executes an automatic intervention in the steering of the rear axle when a .mu.-split condition is detected, in order to stabilize the tracking of the vehicle. The steering always takes place in the direction of the vehicle side on which the higher braking torque is generated; this applies also to cornering, irrespective of whether the lower .mu.-value is on the inside of the bend or on the outside of the bend and, furthermore, irrespective of whether the vehicle is being braked or accelerated.

Abstract: A front wheel suspension for motor vehicles with the use of a triangularly shaped guide member whose two guide arms are elastically supported at the vehicle superstructure in such a way that of the two guide arms, the forwardly disposed guide arm is directly elastically connected at the vehicle superstructure while the rear guide arm is connected with the vehicle superstructure by way of a cross yoke that is common to the wheel suspensions of both vehicle sides; the forward and rear guide arm of each triangular guide member are thereby pivotally connected with each other and a relatively radially soft bearing support is used for the forward guide arm at the vehicle superstructure; while the rear guide arm is pivotally connected at the cross yoke in such a manner that the connection of the rear guide arm with the cross yoke is constructed relatively hard at least in the direction of the line of force determined by its points of pivotal connection.