Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SPARK PLUG
Document Type and Number:
WIPO Patent Application WO/2015/125406
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a spark plug having excellent durability by providing a central electrode and/or a grounding electrode with a tip having excellent resistance to spark-wear under high-temperature environment. The spark plug is provided with a central electrode and a grounding electrode disposed with a gap from the central electrode, said spark plug being characterized in that: there is a tip forming the gap on the central electrode and/or the grounding electrode; the tip has a metal matrix, whereof the main constituent is Ir, and oxide particles containing at least one species of oxide having a perovskite structure represented by the general formula ABO3 (where A is at least one species selected from the group 2 elements of the periodic table, and B is at least one species selected from the metal elements); and the proportion of the surface area occupied by the oxide particles upon observation of the cross section of the tip is 1% to 13% inclusive.

Inventors:
SUMOYAMA, Daisuke (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
KANEMARU, Tomonori (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
Application Number:
JP2015/000100
Publication Date:
August 27, 2015
Filing Date:
January 13, 2015
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NGK SPARK PLUG CO., LTD. (14-18, Takatsuji-cho Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
International Classes:
H01T13/39; C22C1/05; C22C5/04; B22F1/00
Foreign References:
JPH1116658A1999-01-22
Other References:
See also references of EP 3113307A4
Attorney, Agent or Firm:
AOKI, Noboru et al. (C/O NGK SPARK PLUG CO. LTD, 2808 Oaza-Iwasaki, Komaki-sh, Aichi 10, 〒4858510, JP)
Download PDF: