Patent ID: 6428119
Filing Date: 2002-08-06
Classification: B60T

Abstract:
A control device for an antilock brake system comprising:an input hydraulic chamber in communication with a master cylinder; an output hydraulic chamber in communication with a caliper cylinder of a brake; a cut valve in communication with said input hydraulic chamber and said output hydraulic chamber for providing a hydraulic cutoff condition; an expander piston for opening said cut valve, wherein said expander piston is located on an open end side of said cut valve in an open position, and said expander piston closes said cut valve by increasing a volume of said output hydraulic chamber in a closed position, wherein said expander position is located in a closed end side in said closed position; a crank mechanism for displacing said expander piston; a servomotor for turning said crank mechanism to a predetermined target angle; and a stopper member for setting a turning limit for said crank mechanism, said expander piston is displaced in a step ? reaching said closed position during an ABS operation and being retracted to said open position during a non-ABS operation.