Actuator unit for an electro-hydraulic brake system

Details Actuator unit for an electro-hydraulic brake system Actuator unit for an electro-hydraulic brake system

2006-11-07

2006-11-07

Williams, Thomas (Department: 3683)

Brakes

Operators

Fluid pressure

Reexamination Certificate

active

07131520

ABSTRACT:
An actuator unit for an electro-hydraulic brake system of the ‘brake-by-wire’ type, the first and second pistons thereof being preloaded by a resetting spring each in opposition to the actuating direction. The first pressure chamber of the tandem master cylinder is connected to a hydraulic chamber limited by a simulator element. On the other hand, the simulator element defines a simulator chamber that accommodates a simulator spring and is connected to a pressure fluid reservoir. A valve device is provided to open or close the hydraulic connection between simulator chamber and pressure fluid reservoir. To increase the reliability in operation of a hydraulic fallback mode, at least one channel portion through the pressure chamber, closed at the edge at least in areas, is provided for the purposeful removal of pressure fluid contaminants by means of a compulsory pressure fluid scavenging operation.

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Search Report of the German Patent Office for Appln 10222270.3.

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