Patent ID: 6318815
Filing Date: 2001-11-20
Classification: B60T,Y10S

Abstract:
A braking force boosting device, comprising:an actuatable input member,an output member for applying a master brake cylinder,a control valve, actuatable by a valve piston and arranged in a control housing, for controlling the boosting energy generated as a result of a pressure difference between a chamber of variable pressure and a vacuum chamber,a boost sensor for sensing a point of maximum boost generated by the braking force boosting device, wherein said boost sensor generates a signal proportional to boost force, wherein said boost sensor senses a pressure difference between the chamber of variable pressure and the ambient pressure and further determines a change of the time derivative of the pressure in the chamber of variable pressure and wherein the boost sensor generates a signal reporting the point of maximum boosting whenever the pressure difference and the derivative of the pressure difference approaches zero.