Trw Fahrwerksysteme Gmbh & Co. Kg

Trw Automotive Gmbh

Jochen Gessat

Martin Jordan

Michael Scholand

Ulrich Wienecke

Kai Grebe

Tim Lloyd

Keith Alan Jones

Georg Brinkert

A motor-pump unit, in particular for a power steering system of a motor vehicle, comprises a housing, a pump, and a drive motor. The pump is constructed as a prefabricated pump module. Both the pump module and the motor are received directly in the housing.

Motor-pump unit

The invention relates to a combined check and pressure control valve (), comprising a check valve element () which is adjustable between an opened position and a closed position, and a pressure control valve element () which on exceeding a predetermined pressure can be lifted off a valve seat (), so that at least one outflow channel is opened, characterized in that the check valve element () is a valve plate which in the closed position lies against at least one annular sealing seat (), which is impressed in a thin-walled component, preferably a sheet metal part ().

Combined check/pressure control valve

A method of controlling a power steering system having an adjusting mechanism for adjusting at least one vehicle wheel is disclosed herein. The system includes a steering wheel, a position sensor, and a drive system, such as a servo pump driven by an electric motor, to provide steering assistance a steering wheel and a position sensor. It is determined whether the adjusting mechanism is approaching an end position. If it is found that the adjusting mechanism is approaching the end position, then the drive system is controlled in such a way that it provides a diminishing steering assistance.

Method of controlling a power steering system

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Brühl, Germany

Jochen Gessat