Patent ID: 6748310
Filing Date: 2004-06-08
Classification: B60T,F16D

Abstract:
An electric brake system comprising:a brake manipulated variable sensor that detects a driver's brake manipulated variable of a brake operating device; an electric wheel brake mechanism having a pair of brake friction pads that are opposite to each other for sandwiching therebetween a disk rotor rotatable together with a road wheel and for producing a braking force resulting from braking torque application to the disk rotor; a first brake friction pad thrust sensor that detects a first pressure of a first one of the brake friction pad pair against one side wall of the disk rotor; a second brake friction pad thrust sensor that detects a second pressure of the second brake friction pad against the other side wall of the disk rotor; a control unit configured to be electronically connected to the brake manipulated variable sensor, the first and second brake friction pad thrust sensors and the electric wheel brake mechanism, for controlling the electric wheel brake mechanism responsively to the brake manipulated variable, and the first and second pressures; and the control unit causing a movement of the brake friction pad pair into contact with the disk rotor when the brake operating device is conditioned in an inoperative state, and detecting a position of the brake friction pad pair, at which the first and second pressures become greater than respective predetermined threshold values during the movement of the brake friction pad pair into contact with the disk rotor, as a braking initiation position.