Zf Lenksysteme Gmbh

Robert Boschgmbh

Robert Bosch Automotive Steering Gmbh

Wilfried Leutner

Helmut Knoedler

Klaus-Dieter Leimbach

Werner Harter

Peter Dominke

Chi-Thuan Cao

Herbert Lohner

Jens Hafermalz

Wolfgang Pfeiffer

Juergen Schuele

Martin Budaker

Viktor Fast

Rainer Woeger

The disclosure relates to a method and to devices for operating a power steering system. wherein a motor torque applied by an electric motor is superposed on a specified manual torque, wherein a beginning freezing of the power steering system is detected by means of suitable measures, and wherein the electric motor is controlled with an oscillating control signal to avoid the freezing of the power steering system, whereby an oscillating application of a shaking torque to the power steering system, applied by the electric motor, is effected. A control signal that has first time spans in which the control signal has an increased amplitude and second time spans in which the control signal has no amplitude or a reduced amplitude is generated, whereby the shaking torque is produced with an increased maximum torque in the first time spans, without thermal overloading of the electric motor.

Method and device for operating a power steering system

A power-steering drive for a steering system in a motor vehicle includes a motor driving a motor shaft and a transmission situated between the motor shaft and an output shaft. The transmission takes the form of a combined worm-belt transmission. Furthermore, in a method for adjusting the transmission of a power-steering drive, the adjustment is performed by solely adjusting the intermediate shaft relative to the motor shaft and/or the output shaft.

Worm-belt transmission of a power-steering drive

A protective device for a power-assisted steering system, such a power-assisted steering system, and a method for protecting a power-assisted steering system are described. Provided in the described power-assisted steering system is a circuit that closes a separation in the neutral point of an electric motor when the rotational speed of the electric motor exceeds a prespecified value.

Protective device for a power-assisted steering system

A steer-by-wire steering system has a steering wheel actuator and a braking device that acts on the steering column. The braking device is activated when the vehicle steering wheel is to be blocked or at least sharply braked, such as when the steering stop is reached or a wheel goes over the edge of a curb. The braking device functions like a switchable freewheel.

Clutch for steer-by-wire steering system

A steer-by-wire steering system is proposed, having a steering wheel actuator and a braking device that acts on the steering column (). The braking device is activated when the vehicle steering wheel is to be blocked or at least sharply braked, such as when the steering stop is reached or a wheel goes over the edge of a curb. The braking device functions like a switchable freewheel.

Coupling for a steer-by-wire steering system

A steering system, e.g., a hydraulic rack and pinion steering system for motor vehicles, includes a steering handle for prescribing a steering intention, a pressure medium source and a control valve device for controlling a flow of pressure medium to and from a servomotor in order to deflect vehicle wheels. The control valve device has a closed center, and a pressure medium accumulator is provided for producing and/or assisting a flow of pressure medium to and from the servomotor.

Growing community of inventors

Schwaebisch Gmuend, Germany

Wilfried Leutner