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Title:
CYLINDER INTERNAL-PRESSURE SENSOR FOR ENGINE
Document Type and Number:
WIPO Patent Application WO/2012/131788
Kind Code:
A1
Abstract:
A cylinder internal-pressure sensor is provided with: a housing unit (2) which is formed from an outer cylinder section (2e) and an inner cylinder section (2i) obtained by forming elastic portions (2es, 2is), having elasticity in the axial direction (Fs), in a central section (Xm) in the axial direction (Fs); a pressure-receiving ring-block section (3), which is hermetically fixed between the outer cylinder section (2e) and the inner cylinder section (2i) forward of the elastic portions (2es, 2is), passes through the elastic portions (2e, 2i) and approaches the rear of the elastic portions(2e, 2i), and the front surface (3f) of which is a pressure receiving surface; at least three pressure detection elements (5a, 5b, 5c...) which are arranged at equal intervals along the peripheral direction (Ff), which touch an electrode section (4) provided on the rear surface (3r) of the pressure-receiving ring-block section (3), and on which internal pressure (Pc) from the pressure-receiving ring-block section (3) acts; and a support ring-block section (6) which is fixed between the outer cylinder section (2e) and the inner cylinder section (2i), the front surface (6f) of which is a support surface for supporting the pressure detection elements (5a, 5b, 5c...) and which is combined with an other electrode (7).

Inventors:
TAKAHASHI, Kazuo (C/O CITIZEN FINETECH MIYOTA CO.LTD, 4107-5, Ooaza Miyota, Miyota-machi, Kitasaku-gu, Nagano 95, 〒3890295, JP)
高橋和生 (〒95 長野県北佐久郡御代田町大字御代田4107番地5シチズンファインテックミヨタ株式会社内 Nagano, 〒3890295, JP)
SUDOU, Aki (C/O CITIZEN FINETECH MIYOTA CO, .LTD. 4107-5, Ooaza Miyota, Miyota-machi, Kitasaku-gu, Nagano 95, 〒3890295, JP)
Application Number:
JP2011/001976
Publication Date:
October 04, 2012
Filing Date:
March 31, 2011
Export Citation:
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Assignee:
CITIZEN FINETECH MIYOTA CO.,LTD. (4107-5, Ooaza Miyota Miyota-machi, Kitasaku-gu, Nagano 95, 〒3890295, JP)
シチズンファインテックミヨタ株式会社 (〒95 長野県北佐久郡御代田町大字御代田4107番地5 Nagano, 〒3890295, JP)
CITIZEN HOLDINGS CO.,LTD. (1-12, Tanashicho 6-chome Nishitokyo-sh, Tokyo 11, 〒1888511, JP)
シチズンホールディングス株式会社 (〒11 東京都西東京市田無町六丁目1番12号 Tokyo, 〒1888511, JP)
TAKAHASHI, Kazuo (C/O CITIZEN FINETECH MIYOTA CO.LTD, 4107-5, Ooaza Miyota, Miyota-machi, Kitasaku-gu, Nagano 95, 〒3890295, JP)
International Classes:
G01L23/10; F02D35/00
Foreign References:
JPS59211835A1984-11-30
JPS58144247U1983-09-28
JPS63235841A1988-09-30
Attorney, Agent or Firm:
SHIMODA, Shigeru (5F Fujikasai Nagano Building, 1393-3 Midori-ch, Nagano-shi Nagano 13, 〒3800813, JP)
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Claims: