Title:
HYDRAULIC CONTROL VALVE AND HYDRAULIC CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/157125
Kind Code:
A1
Abstract:
A hydraulic control valve is configured in such a manner that a positive pressure chamber, in which an input port and an output port are open, and a back pressure chamber are respectively formed on one side and the other side of a piston which moves forward and backward within a cylinder in the axial direction. A valve body for opening and closing the output port is provided so as to be connected to the piston. The positive pressure chamber and the back pressure chamber are connected through a first flow-restricting section which produces a pressure difference between the positive pressure chamber and the back pressure chamber. An opening/closing valve for selectively connecting the back pressure chamber to a portion having a lower pressure than the back pressure chamber is connected to the hydraulic control valve. The input port is connected to a high-pressure section, and the output port is connected to a low-pressure section having a lower pressure than the high-pressure section. The hydraulic control valve is also provided with a second flow-restricting section for limiting the flow of pressurized oil flowing into the positive pressure chamber through the input port.
Inventors:
SUZUKI YUJI (JP)
KOBAYASHI TOSHIYUKI (JP)
KOBAYASHI TOSHIYUKI (JP)
Application Number:
PCT/JP2012/060606
Publication Date:
October 24, 2013
Filing Date:
April 19, 2012
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
SUZUKI YUJI (JP)
KOBAYASHI TOSHIYUKI (JP)
SUZUKI YUJI (JP)
KOBAYASHI TOSHIYUKI (JP)
International Classes:
F16K31/122; F15B11/02; F16K1/00
Foreign References:
| JP2011163508A | 2011-08-25 | |||
| JP2011163393A | 2011-08-25 | |||
| JP2003246565A | 2003-09-02 |
Attorney, Agent or Firm:
WATANABE, TAKEO (JP)
Takeo Watanabe (JP)
Takeo Watanabe (JP)
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