Lucas Industries Public Limited Company

Lucas Automotive Gmbh

Stefan Borsch

Peter Schluter

The invention relates to a sensor arrangement () for a vacuum brake booster with a brake booster housing comprising at least one vacuum chamber and at least one working chamber that is separated from the latter by a moveable wall and is connectable either to vacuum or at least atmospheric pressure, as well as a bore () disposed in the brake booster housing. The sensor arrangement () comprises a partition () which seals the brake booster housing off from ambient atmosphere when the sensor arrangement () is assembled. The sensor arrangement () also comprises a carrier element (), which is passed through the bore () and disposed in the interior of the brake booster in the assembled state. A pressure sensor () is disposed on the carrier element (). The carrier element () with the pressure sensor () projects into the interior of the brake booster housing such that the pressure sensor () is positioned in the vacuum chamber or the working chamber of the brake booster.

Sensor arrangement for a vacuum brake booster and a vacuum brake booster provided with this sensor arrangement

A vehicle braking system with an electronically controllable brake servo unit which comprises a first pneumatic working chamber (13) and a second pneumatic working chamber (14) which are separated from each other by a movable wall (11), wherein a travel sensor (20) is provided for the detection of displacements of the movable wall (11) relative to a stationary wall (5b) of at least one of the two working chambers (13, 14) is improved to simplify assembly and adjustment of the travel sensor in such a manner that a wall (11) is provided with an opening (19) through which a measuring element (10) being connected with another wall (5b) is projecting, and that the travel sensor (20) converts a relative movement between the measuring element (10) and the travel sensor (20) in the direction of the movement of the movable wall (11) into a signal used for controlling the brake servo unit.

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Winningen, Germany

Stefan Borsch