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Patent Searching and Data


Title:
HYDRAULIC CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/021218
Kind Code:
A1
Abstract:
A highly efficient hydraulic control device having a reduced loss due to leakage even if a high hydraulic pressure supply section such as a stepless transmission is provided to the hydraulic control device. A hydraulic control device is provided with low hydraulic pressure supply sections (8, 9) to which low hydraulic pressure sourced from a hydraulic pump (11) is supplied, high hydraulic pressure supply sections (4, 5) to which hydraulic pressure higher than the hydraulic pressure supplied to the low hydraulic pressure supply sections (8, 9) is supplied, a high hydraulic pressure source (14) for holding hydraulic pressure higher than the hydraulic pressure to be supplied to the high hydraulic pressure supply sections (4, 5), supply-side control valves (DSP1, DSS1, DCS1) mounted in supply oil paths (15-17) which supply hydraulic pressure to the high hydraulic pressure supply sections (4, 5) from the high pressure source (14) and opening and closing the supply oil paths by driving valve elements pressed to valve seats, and discharge-side control valves (DSP2, DSS2, DCS2) for connecting the high hydraulic pressure supply sections to drain portions by driving valve elements pressed to valve seats.

Inventors:
FUJIMURA SHINYA (JP)
HATTORI YUJI (JP)
YOKOKAWA TAKAHIRO (JP)
KAWAKAMI TAKAHO (JP)
INAGAKI TAKAFUMI (JP)
Application Number:
PCT/JP2009/062957
Publication Date:
February 25, 2010
Filing Date:
July 17, 2009
Export Citation:
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Assignee:
TOYOTA MOTOR CO LTD (JP)
FUJIMURA SHINYA (JP)
HATTORI YUJI (JP)
YOKOKAWA TAKAHIRO (JP)
KAWAKAMI TAKAHO (JP)
INAGAKI TAKAFUMI (JP)
International Classes:
F16H61/00; F16H61/02; F16H59/26; F16H59/48; F16H59/70; F16H61/662
Foreign References:
JP2007071272A2007-03-22
JPH0212562U1990-01-25
JPH03134368A1991-06-07
JP2007162919A2007-06-28
JP2007270937A2007-10-18
Attorney, Agent or Firm:
WATANABE, TAKEO (JP)
Takeo Watanabe (JP)
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