Patent ID: 6685280
Filing Date: 2004-02-03
Classification: B60T,Y10S

Abstract:
A brake device for use with automobiles, the brake device comprising:a stroke sensor that detects a stroke of a brake pedal; a reservoir that stores a braking liquid; an auxiliary pressure source that pressurizes the brake liquid within said reservoir and accumulates the pressurized braking liquid; a controller that calculates a braking liquid pressure required for braking wheels, based upon information output from said stroke sensor; a proportional pressure control valve that adjusts the pressurized braking liquid supplied from said auxiliary pressure source in accordance with an electric signal output from said controller; and an auxiliary control mechanism including a moving portion engaging with the brake pedal, the moving portion directly actuating said proportional pressure control valve in accordance with the stroke, if the brake pedal is stepped beyond a predetermined stroke, said auxiliary control mechanism also including an extension rod extending from a spool that switches said proportional pressure control valve, and an electromagnetic clutch installed with said extension rod, wherein upon receiving a signal indicating that the brake pedal is stepped beyond a predetermined stroke, said electromagnet clutch holds said extension rod so as to press said spool through said extension rod.