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Patent Searching and Data


Title:
SPARK PLUG FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2014/156272
Kind Code:
A1
Abstract:
This spark plug (1) is provided with a housing (2), an insulator (3), a center electrode (4) which is held inside of the insulator (3) such that the tip (41) protrudes, a ground electrode (5) consisting of an upright portion (51) and an opposing portion (52), and a guide member (22) which has a guide surface (221) facing the upright portion (51) of the ground electrode (5) and which guides the flow of mixed gas that is inside of the combustion chamber of the internal combustion engine to a spark discharge gap (G) formed between the central electrode (4) and the opposing portion (52) of the ground electrode (5). The opposing portion (52) of the ground electrode (5) has an opposing surface (521) opposing the central electrode (4), a back surface (522) which is on the side opposite of the opposing surface (521) in the axial direction, and a pair of side surfaces (523, 524) which connect the opposing surface (521) and the back surface (522). Of the pair of side surfaces (523, 524), at least the side surface (523) on the side of the guide member (22) is formed such that an obtuse angle is formed with the opposing surface (521).

Inventors:
AOCHI, Takanobu (INC. 14, Iwaya, Shimohasumi-cho, Nishio-cit, Aichi 12, 〒4450012, JP)
INOHARA, Takayuki (INC. 14, Iwaya, Shimohasumi-cho, Nishio-cit, Aichi 12, 〒4450012, JP)
OKABE, Shinichi (INC. 14, Iwaya, Shimohasumi-cho, Nishio-cit, Aichi 12, 〒4450012, JP)
SHIBATA, Masamichi (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
NISHIO, Noriaki (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
Application Number:
JP2014/051807
Publication Date:
October 02, 2014
Filing Date:
January 28, 2014
Export Citation:
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Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
H01T13/02; F02P13/00; H01T13/32
Foreign References:
JPH09129356A1997-05-16
JP2006318696A2006-11-24
Attorney, Agent or Firm:
KIKUCHI, Yasuhiro (Yotsuya International Patent Office, MYK YOTSUYA 2F 18-4, Honshiocho, Shinjuku-k, Tokyo 03, 〒1600003, JP)
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