Title:
PIEZOELECTRIC MODULE, INTERNAL COMBUSTION ENGINE, AND GLOW PLUG
Document Type and Number:
WIPO Patent Application WO/2010/013734
Kind Code:
A1
Abstract:
Provided are a piezoelectric module having a high response and an excellent durability, suitably used for a pressure sensor and the like, and an internal combustion engine and a glow plug which use the piezoelectric module.
The piezoelectric module comprises a head pin (1), a piezoelectric element (2) provided in such a manner that a first surface (2a) thereof is positioned on the rear end surface side of the head pin (1), and a rodlike insertion fixture (3) an end of which presses a second surface (2b) of the piezoelectric element (2) opposed to the first surface (2a) and is inserted into a fitting hole (through hole) (6a) of a device (pressure chamber) (6). The piezoelectric module has an outer tube (4) covering the piezoelectric element (2) and the rear end portion of the head pin (1) in such a manner that one end thereof is fixed to the end portion of the insertion fixture (3) and the other end is locked to a step (6b) of the wall surface of the through hole (6a) and an inner tube (5) provided inside the outer tube (4) and serving to relieve the pressure transmitted from the head pin (1) to the piezoelectric element (2) by elastic deformation. The fastening force and the force to be measured are separated and occurrence of the force signal offset due to the fastening force is avoided, and this allows direct measurement of the pressure.
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Inventors:
INAGAKI, Masahiro (Kagoshima Kokubu Plant 1-1, Kokubuyamashita-cho, Kirishima-sh, Kagoshima 96, 〒8994396, JP)
Application Number:
JP2009/063470
Publication Date:
February 04, 2010
Filing Date:
July 29, 2009
Export Citation:
Assignee:
KYOCERA CORPORATION (6 Takeda Tobadono-cho, Fushimi-ku Kyoto-sh, Kyoto 01, 〒6128501, JP)
京セラ株式会社 (〒01 京都府京都市伏見区竹田鳥羽殿町６番地 Kyoto, 〒6128501, JP)
京セラ株式会社 (〒01 京都府京都市伏見区竹田鳥羽殿町６番地 Kyoto, 〒6128501, JP)
International Classes:
G01L23/10; G01L9/08
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