Title:
INTERNAL COMBUSTION ENGINE IGNITION COIL
Document Type and Number:
WIPO Patent Application WO/2016/163438
Kind Code:
A1
Abstract:
This internal combustion engine ignition coil is fitted with a spark plug having an insulator provided with an insulator head portion having no corrugation. This ignition coil has a coil main body portion for generating a high voltage, and a joint portion holding therein a conduction member for connecting electrically the coil main body portion to the spark plug. The joint portion has a plug cap comprising an elastic member having a cylindrical shape, and allows the insulator head portion of the spark plug to be inserted therein. The plug cap has a tight-contact portion whereof the inner peripheral surface is brought into tight contact with the outer peripheral surface of the insulator. The tight-contact portion has a forward end side tight-contact portion that is more to the forward end side than a central position in the axial direction, and a base end side tight-contact portion that is more to the base end side than the central position. In at least a portion of the base end side tight-contact portion, a strong straining force portion is formed, wherein the straining force squeezing the insulator head portion is stronger than the straining force in any position in the forward end side tight-contact portion.
Inventors:
HATTORI KENJI (JP)
DOI KAORI (JP)
SHIBATA MASAMICHI (JP)
MIWA TETSUYA (JP)
DOI KAORI (JP)
SHIBATA MASAMICHI (JP)
MIWA TETSUYA (JP)
Application Number:
PCT/JP2016/061349
Publication Date:
October 13, 2016
Filing Date:
April 07, 2016
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H01T13/04; F02P13/00; F02P15/00; H01T13/20
Foreign References:
| JP2008021870A | 2008-01-31 | |||
| JP2014022183A | 2014-02-03 | |||
| JPH11230015A | 1999-08-24 |
Attorney, Agent or Firm:
KIKUCHI, YASUHIRO (JP)
Yasuhiro Kikuchi (JP)
Yasuhiro Kikuchi (JP)
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