PRESSURE CONTROL DEVICE - TOYOTA MOTOR CO LTD

Title:

PRESSURE CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/2008/010579

Kind Code:

A1

Abstract:

A pressure control device in which a drive piston (17) and a pressure control valve (24) are movably supported in a housing (11) and urged in it. This enables a pressure chamber (R3) and a pressure reduction chamber (R2) to be communicated with each other. Also, the drive piston (17) and the pressure control valve (24) are moved via an annular piston (19) by electromagnetic force of a solenoid. This enables a high-pressure chamber (R1) and the pressure chamber (R3) to be communicated with each other. Further, an external piston (30) is movably provided so as to face the drive piston (17), and control pressure acting from a rear pressure chamber (R32) on the drive piston (17) side is set higher than external pressure acting from the outside by operation of an input section (36). This enables a drive valve to be easily moved by pressure from the outside when the electric power source fails, allowing appropriate pressure control.

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Inventors:

ISONO HIROSHI (JP)

Application Number:

PCT/JP2007/064367

Publication Date:

January 24, 2008

Filing Date:

July 20, 2007

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
ISONO HIROSHI (JP)

International Classes:

F16K31/06; F16K31/122; G05D16/00

Foreign References:

JPH0483981A	1992-03-17
JPH04124387U	1992-11-12
JP3110861B2	2000-11-20
JP2004060806A	2004-02-26
JP3110861B2	2000-11-20
JP2004060806A	2004-02-26

Other References: