Title:
SPARK PLUG
Document Type and Number:
WIPO Patent Application WO/2018/105292
Kind Code:
A1
Abstract:
In order to provide a spark plug capable of suppressing radio-wave noise, an insulating body has a shaft hole extending in the axial direction, from the tip side to the rear end side thereof. At least part of a center electrode is inserted into the tip side of the shaft hole and at least part of a terminal fitting is inserted into the rear end side of the shaft hole. A connection section: connects the terminal fitting and the center electrode, inside the shaft hole; includes a plurality of magnetic particles comprising both ferrite particles and a conductive substance coating the particles; and has a conductive layer section that the conductive substance for any two magnetic particles among the plurality of magnetic particles comes in contact with. The conductive layer section has a straight line distance from end to end of at least 100 µm and a thickness of at least 2 µm.
Inventors:
KUROSAWA KAZUHIRO (JP)
TAKAOKA KATSUYA (JP)
TANAKA KUNIHARU (JP)
KURONO HIROKAZU (JP)
UEGAKI HIRONORI (JP)
YOKOYAMA KOTA (JP)
TAKAOKA KATSUYA (JP)
TANAKA KUNIHARU (JP)
KURONO HIROKAZU (JP)
UEGAKI HIRONORI (JP)
YOKOYAMA KOTA (JP)
Application Number:
PCT/JP2017/040226
Publication Date:
June 14, 2018
Filing Date:
November 08, 2017
Export Citation:
Assignee:
NGK SPARK PLUG CO (JP)
International Classes:
H01T13/39; H01T13/20
Domestic Patent References:
WO2015099081A1 | 2015-07-02 | |||
WO2015099082A1 | 2015-07-02 |
Foreign References:
JP5996044B1 | 2016-09-21 |
Attorney, Agent or Firm:
AOKI Noboru et al. (JP)
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