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Patent Searching and Data


Title:
SPARK PLUG
Document Type and Number:
WIPO Patent Application WO/2017/110015
Kind Code:
A1
Abstract:
The objective of the invention is to reduce high-frequency noises from a spark plug. In the terminal metal piece of a spark plug, a Fe-containing oxide layer is formed on the surface of a sub-guard rod-shaped portion between the upper extremity of the main body metal piece and a terminal guard portion. The surface area of the Fe-containing oxide layer is 10% or more of the surface area of the sub-guard rod-shaped portion.

Inventors:
KUROSAWA, Kazuhiro (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
TAKAOKA, Katsuya
TANAKA, Kuniharu
HONDA, Toshitaka
KURONO, Hirokazu
UEGAKI, Hironori
Application Number:
JP2016/004262
Publication Date:
June 29, 2017
Filing Date:
September 19, 2016
Export Citation:
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Assignee:
NGK SPARK PLUG CO., LTD. (14-18, Takatsuji-cho Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
International Classes:
H01T13/20; F02P13/00; H01T13/05
Foreign References:
JPS5311246A1978-02-01
JPS5765686A1982-04-21
JPS62150680A1987-07-04
JP2005285486A2005-10-13
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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