Patent ID: 6305506
Filing Date: 2001-10-23
Classification: B60T,F16D

Abstract:
An electrically operated braking system comprising a motor-driven disc brake including an electric motor as a drive source for braking a wheel of an automotive vehicle, and a motor control device for controlling said electric motor, said motor-driven disc brake further including:a disc rotor having a friction surface and rotating with said wheel;a friction pad movable for contact with said friction surface to restrict rotation of said disc rotor;a pad support mechanism for supporting said friction pad such that said friction pad is movable in a direction intersecting said friction surface;a pad pressing mechanism comprising said electric motor and a pressing member, said electric motor producing a drive force for moving said pressing member to force said friction pad against said friction surface of said disc rotor;a self-servo mechanism for providing a self-servo effect of boosting a friction force generated between said friction surface and said friction pad, on the basis of the friction force; anda self-servo effect inhibiting mechanism for inhibiting said self-servo mechanism from providing said self-servo effect while a braking force between said wheel and a road surface is smaller than a predetermined first value, said self-servo effect inhibiting mechanism including means for inhibiting a movement of said friction pad due to said friction force.