Title:
MASTER CYLINDER DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/158850
Kind Code:
A1
Abstract:
A master cylinder device (110) comprises a main body section (650) wherein a first pressure chamber (R1) which is for pressurising an operating fluid is partitioned off, and a flange section (652) which is on the outer periphery of the main body section; the device is provided with a first pressure piston (604) wherein a facing chamber (R4) filled with operating fluid is partitioned off in front of the flange section, and an input piston (608) wherein a between-piston chamber (R6) is partitioned off at the front thereof by the first pressure piston, and which can be contracted by the operation of a brake pedal (150). The device is further provided with: an electromagnetic opening and closing valve (732) which permits the input piston to abut the pressure piston, and connects the facing chamber and the between-piston chamber to a reverser (122); and another electromagnetic opening and closing valve (742) which prevents the contraction of the input piston. By configuring the master cylinder device in this way, operational force can be depended upon and so the operational fluid in the pressure chamber can be pressurised with the contraction of the input piston prevented.
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Inventors:
ISONO HIROSHI (JP)
Application Number:
PCT/JP2011/063642
Publication Date:
December 22, 2011
Filing Date:
June 15, 2011
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
ISONO HIROSHI (JP)
ISONO HIROSHI (JP)
International Classes:
B60T13/12; B60T11/16; B60T11/20
Foreign References:
| JP2002362352A | 2002-12-18 | |||
| JP2005162132A | 2005-06-23 | |||
| JP2006282001A | 2006-10-19 |
Attorney, Agent or Firm:
CHUBU PATENT OFFICE (JP)
Central patent business corporation international patent firm (JP)
Central patent business corporation international patent firm (JP)
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Claims: