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Patent Searching and Data


Title:
SPARK PLUG
Document Type and Number:
WIPO Patent Application WO/2019/198295
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a spark plug which not only enables an initial flame to be generated more easily but also enables the flame to grow more easily. The spark plug is provided with: a center electrode extending along an axis from a tip end side to a rear end side; an insulator having a bottomed cylindrical tip end part surrounding at least the tip of the center electrode; and a cylindrical main metal shell for holding the insulator in a state of projecting toward the tip end side from a tip end part thereof. The spark plug is provided with multiple grounding electrodes which are connected to the tip end part of the main metal shell at the other end and which form discharge gaps with the tip end part of the insulator at the one end, and the multiple grounding electrodes include grounding electrodes having different discharge gap lengths.

Inventors:
TAKAHASHI Kei (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
KASAHARA Daisuke (C/O NGK SPARK PLUG CO. LTD, 14-18,Takatsuji-cho, Mizuho-ku, Nagoya-sh, Aichi 25, 〒4678525, JP)
Application Number:
JP2019/001450
Publication Date:
October 17, 2019
Filing Date:
January 18, 2019
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:
H01T13/32
Domestic Patent References:
WO2017110209A12017-06-29
Foreign References:
JP2010037949A2010-02-18
JP2017045659A2017-03-02
Attorney, Agent or Firm:
NAKAJIMA Hiroki (C/O NGK SPARK PLUG CO. LTD, 2808 Oaza-Iwasaki,Komaki-sh, Aichi 10, 〒4858510, JP)
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