Patent ID: 6948584

Claim:
A steering system for a motor vehicle including a hydraulic rack and pinion steering system, comprising a steering handle configured to prescribe a steering intention and adjustable by a driver, a rotatably mounted pinion arranged in engagement with an axially displaceable rack, a control valve device having a closed center, a hydraulic servomotor including a piston rod drive-connected to the rack and arranged to provide power assistance, the servomotor including two cylinder spaces connected to two cylinder connection on the control valve device via working lines, a pressure medium source, the pressure medium source and the control valve device configured to provide control of a fluid of pressure medium to and from the servomotor to deflect vehicle wheels, a pressure medium accumulator configured to produce and/or assist the flow of the pressure medium to and from the servomotor so that the vehicle wheels are steerable at least three times from a first stop to a second stop, if the pressure medium source fails, and, an electric actuating motor arranged at one end of the pinion, and not positively coupled to the steering handle, the actuating motor controllable via a control circuit by the steering handle, and is configured to actuate the control valve device.