Title:
DIFFERENTIAL PRESSURE DETECTION DEVICE AND FLUID PRESSURE CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/143470
Kind Code:
A1
Abstract:
A highly reliable differential pressure detection device which can be produced without an increase in cost and which can, without making complex the structure for connecting two fluid pressure spaces, accurately detect the differential pressure between the two spaces.
A differential pressure detection device is provided with a fluid valve which comprises: a first pressure receiving section which receives a pressure for moving a piston valve member to one side; a second pressure receiving section and a third pressure receiving section which receive a pressure for moving the piston valve member to the other direction; a pressure introducing port into which the pressure from a pressure supply source can be introduced; and a pressure discharge port which can discharge pressure. The first pressure receiving section is communicated with a first fluid pressure space, the second pressure receiving section is communicated with a second fluid pressure space, and the third pressure receiving section can be communicated with the pressure introducing port when the piston valve member has been moved to one side and can be communicated with the pressure discharge port when the piston valve member has been moved to the other side. The differential pressure detection device is also provided with a pressure sensor capable of detecting the pressure supplied to the third pressure receiving section.
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Inventors:
INABA Akira (3-13-26 Yakyu-cho, Higashimatsuyama-sh, Saitama 03, 〒3558603, JP)
Application Number:
JP2010/056820
Publication Date:
December 16, 2010
Filing Date:
April 16, 2010
Export Citation:
Assignee:
Bosch Corporation (6-7 Shibuya 3-chome, Shibuya-ku Tokyo, 60, 〒1508360, JP)
ボッシュ株式会社 (〒60 東京都渋谷区渋谷３丁目６番７号 Tokyo, 〒1508360, JP)
ボッシュ株式会社 (〒60 東京都渋谷区渋谷３丁目６番７号 Tokyo, 〒1508360, JP)
International Classes:
G01L13/00; F02M25/07; F15B11/028
Attorney, Agent or Firm:
EMORI Kenji et al. (Excel Shinjuku-Gyoen Building 5F, 11-3 Shinjuku 1-chome, Shinjuku-k, Tokyo 22, 〒1600022, JP)
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