| 摘要 |
<P>PROBLEM TO BE SOLVED: To miniaturize a device as a whole by constituting in such a manner that a hydraulic pressure in a pressure chamber is properly fed to a master cylinder hydraulic pressure system in a hydraulic pressure braking device for a vehicle which advance-drives a master piston by introducing an output hydraulic pressure of a pressure control valve to the pressure chamber. <P>SOLUTION: When an output braking hydraulic pressure of a master cylinder MC is a first specified pressure or higher, and/or when the hydraulic pressure of the pressure chamber C2 which introduces an output hydraulic pressure of the pressure control valve RG is a second specified pressure or higher, an electromagnetic on/off valve SV is moved from a closing position to an opening position, and the output hydraulic pressure of the pressure chamber C2 is fed to a hydraulic pressure system MH reaching a wheel cylinder from the master cylinder. Thus, a master hydraulic pressure chamber C1 can function by a capacity which can house a braking fluid for becoming a first and/or second specified pressures or higher, and the master cylinder section can compactly be formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
