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Patent Searching and Data


Title:
GLOW PLUG WITH COMBUSTION PRESSURE SENSOR
Document Type and Number:
WIPO Patent Application WO/2012/114721
Kind Code:
A1
Abstract:
In order to improve the airtightness with respect to the combustion chamber for a glow plug equipped with a combustion pressure sensor, a glow plug (100) is equipped with: a housing having a roughly cylindrical main body metal fitting that extends in the axial direction, and a roughly cylindrical cap part, which is provided on the tip of the main body metal fitting, and is shorter than the main body metal fitting in the axial direction, and the diameter of which decreases toward the tip; a heater unit; a connecting member; and a pressure sensor. The cap part is formed from a material having greater tensile strength and proof strength than the material of the main body metal fitting, and the main body metal fitting is formed from a material having a greater thermal expansion coefficient than the material of the cap part.

Inventors:
WATANABE, Tadasi (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
渡邊 忠 (〒25 愛知県名古屋市瑞穂区高辻町14番18号日本特殊陶業株式会社内 Aichi, 〒4678525, JP)
MAEDA, Shunsuke (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
前田 俊介 (〒25 愛知県名古屋市瑞穂区高辻町14番18号日本特殊陶業株式会社内 Aichi, 〒4678525, JP)
Application Number:
JP2012/001134
Publication Date:
August 30, 2012
Filing Date:
February 21, 2012
Export Citation:
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Assignee:
NGK SPARK PLUG CO., LTD. (14-18, Takatsuji-cho Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
日本特殊陶業株式会社 (〒25 愛知県名古屋市瑞穂区高辻町14番18号 Aichi, 〒4678525, JP)
WATANABE, Tadasi (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
渡邊 忠 (〒25 愛知県名古屋市瑞穂区高辻町14番18号日本特殊陶業株式会社内 Aichi, 〒4678525, JP)
MAEDA, Shunsuke (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
International Classes:
F23Q7/00; F02D35/00; F02P19/00
Foreign References:
JP2009520941A2009-05-28
JP2007177782A2007-07-12
JP2009243710A2009-10-22
JP2004205148A2004-07-22
JP2002276942A2002-09-25
Other References:
See also references of EP 2679901A4
Attorney, Agent or Firm:
AOKI, Noboru et al. (C/O NGK SPARK PLUG CO. LTD, 2808 Oaza-Iwasaki, Komaki-sh, Aichi 10, 〒4858510, JP)
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Claims: