| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vehicular braking device capable of simplifying its structure and reducing cost. <P>SOLUTION: The vehicular braking device has a master cylinder 11 which demarcates a cylinder into a front pressure chamber R<SB>1</SB>and a rear pressure chamber R<SB>2</SB>by movably supporting a driving piston 13 in the cylinder 12, and outputting hydraulic pressure in the front pressure chamber R<SB>1</SB>by moving the driving piston 13 by a brake pedal 17. Wheel cylinders 31FR, 31FL are connected to the front pressure chamber R<SB>1</SB>, and wheel cylinders 31RR, 31RL are connected to the rear pressure chamber R<SB>2</SB>, respectively. The front pressure chamber R<SB>1</SB>and the rear pressure chamber R<SB>2</SB>are connected to each other via hydraulic communication piping 58, and a shut-off valve 70 is provided. A pressure control valve 57 is provided which is capable of outputting control pressure to the rear pressure chamber R<SB>2</SB>by moving a driving valve 104 by an electromagnetic force based on target control pressure, and outputting the control pressure to the rear pressure chamber R<SB>2</SB>by moving the driving valve 104 via an external piston 111 by external pressure from the front pressure chamber R<SB>1</SB>. <P>COPYRIGHT: (C)2009,JPO&INPIT |
