Patent ID: 6425643
Filing Date: 2002-07-30
Classification: B60T,F16D

Abstract:
A braking system for a motor vehicle having a wheel comprising:a rotor rotating with said wheel; a friction member movable to be forced onto said rotor, for braking said wheel; a support member for supporting said friction member in frictional contact with said rotor so as to prevent said friction member from being rotated with said rotor; a pressing device for forcing said friction member into frictional contact with said rotor; a force sensor for detecting a force which is generated in a rotating direction of said rotor, due to a frictional contact of said friction member with said rotor; a pressing-force-related quantity sensor whose output varies continuously with a quantity relating to a pressing force by which said friction member is forced onto said rotor by said pressing device; and a friction coefficient estimating device for estimating a friction coefficient of said friction member, on the basis of a relationship between said output of said pressing-force-related quantity sensor and an output of said force sensor.