Lucas Automotive Gmbh

Lucas Industries Limited

Ludwig Friedsam

Peter Schl&uuml;ter

Martin Struschka

Heinrich Plewnia

Gerd Puscher

Michael Geider

Stefan Klöck

Peter Ortel

A brake booster with regenerative brake force generation comprising a force input element coupled to a brake pedal. A chamber arrangement having a vacuum chamber and a working chamber that are separated from one another by a movable wall. A control valve actuated in accordance with a displacement of the force input element. The working chamber is connectable selectively to the vacuum chamber and the atmosphere to generate and reduce a differential pressure at the movable wall. The control valve has a control valve housing that is connected for joint movement to the movable wall. In a first actuation phase of the brake booster from its rest position, the force input element is displaceable relative to the control valve housing by an idle travel, in which the control valve remains non-actuated to suppress a build-up of a differential pressure at the movable wall.

Brake booster for an automotive brake system and corresponding automotive brake system

A master cylinder for a vehicle hydraulic brake system has a housing with a bore formed therein, which is open at one end and in which a first pressure piston and a second pressure piston are guided sealingly and displaceably along an axis. Acting counter to an actuating direction upon the first pressure piston is a restrained first restoring spring and upon the second pressure piston a second restoring spring. In order, in a transportation or disassembly state of the master cylinder, to prevent the first pressure piston from being pressed excessively out of the bore, the second pressure piston is supported by means of a stop component counter to the actuating direction positively in the housing of the master cylinder.

Main cylinder with integrated transportation lock

A vacuum brake booster ( ) is described, having a vacuum chamber ( ) and a working chamber ( ) separated from one another by a movable wall ( ), and a control valve ( ), which comprises a housing ( ) coupled workingly to the movable wall ( ) and which to achieve a pressure difference at the movable wall ( ) is capable of controlling the supply of atmospheric pressure or above-atmospheric pressure to the working chamber ( ) in dependence upon the displacement of an actuating piston ( ). The vacuum brake booster ( ) has an emergency braking aid comprising a permanent magnet ( ) and an armature ( ), which cooperates with the permanent magnet ( ) and is resiliently biased counter to actuating direction and during an emergency braking operation is drawn into abutment with the permanent magnet ( ), with the result that the control valve ( ) is held open for the supply of atmospheric pressure to the working chamber ( ). The vacuum brake booster ( ) comprises a coupling device ( ) for detachably coupling the armature ( ) to the actuating piston ( ).

Vacuum brake booster with mechanical emergency braking aid

A control valve retaining element ( ) for a brake booster ( ) has a hollow cylindrical base member ( ) and a first retaining collar ( ), which is connected to the base member ( ) and has at least one side wall for supporting a bellows end ( ). To enable such a retaining element to be manufactured less expensively and positioned easily and securely on an actuating rod ( ) of a brake booster ( ), a second retaining collar ( ) extends radially inwards from a first end of the base member ( ) and in peripheral direction, wherein the second retaining collar ( ) comprises a first lateral face ( ) for cooperation with a stop ( ) of the actuating rod ( ) and a second lateral face ( ) lying opposite the first lateral face ( ) for cooperation with a compression spring ( ).

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Oberdürenbach, Germany

Ludwig Friedsam