IGNITION PLUG FOR INTERNAL COMBUSTION ENGINES, AND INTERNAL COMBUSTION ENGINE

Title:

IGNITION PLUG FOR INTERNAL COMBUSTION ENGINES, AND INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2019/138854

Kind Code:

A1

Abstract:

An ignition plug (1) for an internal combustion engines has: a cylindrical housing (2); a cylindrical insulator (3) retained inside the housing (2); a center electrode (4) retained inside the insulator (3) and exposed to the front end side (Z1) from the front end of the insulator (3); and a ground electrode (5) which allows an electric discharge to occur between the ground electrode (5) and the center electrode (4). When one side and the other side in a specific direction (X) which is perpendicular to a plug axis direction (Z) are defined respectively as a front side (F) and a rear side (R), the front end surface (20) of the housing (2) has a front end sloped surface (21) which is sloped toward the front end side (Z1) as the front end sloped surface (21) extends from the front end (20F) toward the rear end (20R) of the front end surface (20). The rear end (21R) of the front end sloped surface (21) is positioned further toward the front end side (Z1) than the front end (20F) of the front end surface (20), and is positioned further toward the rear side (R) than the front end (3F) of the insulator (3).

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Inventors:

SUGIURA Akimitsu (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)

Application Number:

JP2018/047424

Publication Date:

July 18, 2019

Filing Date:

December 25, 2018

Export Citation:

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Assignee:

DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)

International Classes:

H01T13/32; H01T13/08; H01T13/52

Foreign References:

JP2011003478A	2011-01-06
JP2009004257A	2009-01-08
JP2016058196A	2016-04-21
JP2017054624A	2017-03-16

Attorney, Agent or Firm:

AICHI, TAKAHASHI, IWAKURA & ASSOCIATES (Meieki Nagata Building, 26-19 Meieki 3-chome, Nakamura-ku, Nagoya-sh, Aichi 02, 〒4500002, JP)

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