Patent ID: 6554373
Filing Date: 2003-04-29
Classification: B60T

Abstract:
A vacuum power booster with an actuating rod adapted to be connected to an actuating pedal, comprising:a housing, a sensor device for sensing the speed of a booster actuation, and an electronic control unit providing output signals which permit activating a pneumatic valve, in order to control the build-up of a pneumatic differential pressure in the housing of the vacuum brake power booster, irrespective of the operation of the rod, wherein the sensor device is configured as a travel sensor of proportional operation which is operable by a movement of a movable wall of the vacuum brake power booster, the output signal of the travel sensor being directly proportional to the actuating travel of the movable wall and being subjected to a time differentiation processing operation in the electronic control unit, wherein an electric switching device is arranged in a control housing accommodating the control valve to detect whether the control valve is operated by the rod.