| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a braking device for vehicle, in which braking control is stabilized by stabilizing operation of a communication control valve. <P>SOLUTION: The braking device for vehicle 10 includes a communication control valve 20 communication-controlling a master cylinder 14 and an oil pump 74 through a master conduit 18 and an oil intake conduit 72. The control valve 20 is an always-closed check valve of a poppet type composed of a head part 22A and a spool part 22B. Then, in the control valve 20, when reserver piston 38 is driven because of reduction of pressure in a reserver room 40 by intake pressure by a pump 74, the head part 22A is separated from a valve sheet 30A to become an opened valve state. At this time, since oil flows in a valve room 34 from a conduit 18 through an annular passage 24 formed at the spool part 22B and is supplied to the pump 74 from the valve room 34 through the conduit 72, the pressure accompanying flow of oil is operated in the direction in which the head part 22A is separates from the valve sheet 30A, that is, in the opened valve direction of the control valve 20. <P>COPYRIGHT: (C)2012,JPO&INPIT |
