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 (JP)
TAKAOKA KATSUYA
TANAKA KUNIHARU
HONDA TOSHITAKA
KURONO HIROKAZU
UEGAKI HIRONORI
TAKAOKA KATSUYA
TANAKA KUNIHARU
HONDA TOSHITAKA
KURONO HIROKAZU
UEGAKI HIRONORI
Application Number:
PCT/JP2016/004262
Publication Date:
June 29, 2017
Filing Date:
September 19, 2016
Export Citation:
Assignee:
NGK SPARK PLUG CO (JP)
International Classes:
H01T13/20; F02P13/00; H01T13/05
Foreign References:
| JPS5311246A | 1978-02-01 | |||
| JPS5765686A | 1982-04-21 | |||
| JPS62150680A | 1987-07-04 | |||
| JP2005285486A | 2005-10-13 |
Attorney, Agent or Firm:
AOKI, Noboru et al. (JP)
Download PDF:
Previous Patent: IMAGE DISPLAY DEVICE, IMAGE DISPLAY METHOD, AND CONTROL PROGRAM
Next Patent: ELECTROSTATIC DETECTION SENSOR
Next Patent: ELECTROSTATIC DETECTION SENSOR