INTERNAL COMBUSTION ENGINE AND SPARK PLUG

To provide an internal combustion engine which can improve productivity while securing a stable fixed state between a housing and a plug cover, and a spark plug.SOLUTION: In an internal combustion engine 10 having a spark plug 1, the spark plug 1 has a cylindrical housing 2, and a plug cover 5 arran...

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1. Verfasser: SUGIURA AKIMITSU
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide an internal combustion engine which can improve productivity while securing a stable fixed state between a housing and a plug cover, and a spark plug.SOLUTION: In an internal combustion engine 10 having a spark plug 1, the spark plug 1 has a cylindrical housing 2, and a plug cover 5 arranged at a tip part of the housing 2 so as to cover a sub-combustion chamber 50 in which a discharge gap G is arranged. The plug cover 5 has a base end hangout part 55 hanging out to an external peripheral side at a base end part. The housing 2 has a cover fixing part 25 for fixing the base end part of the plug cover 5 at the tip part. The cover fixing part 25 has an abutment part 26 on which a base end face 56 of the plug cover 5 abuts, and a tip protrusion 27 for covering the base end hangout part 55 from the external peripheral side and the tip side. The cover fixing part 25 is arranged at a base end side rather than a tip opening end 811 of a plug hole 81 of the internal combustion engine 10.SELECTED DRAWING: Figure 1 【課題】ハウジングとプラグカバーとの安定した固定状態を確保しつつ、生産性を向上させることができる、内燃機関及びスパークプラグを提供すること。【解決手段】スパークプラグ1を有する内燃機関10。スパークプラグ1は、筒状のハウジング2と、放電ギャップGが配される副燃焼室50を覆うようハウジング2の先端部に設けられたプラグカバー5と、を有する。プラグカバー5は、基端部に、外周側へ張り出した基端張出部55を有する。ハウジング2は、先端部に、プラグカバー5の基端部を固定するカバー固定部25を有する。カバー固定部25は、プラグカバー5の基端面56が当接する当接面26と、基端張出部55を外周側及び先端側から覆う先端突出部27とを有する。カバー固定部25は、内燃機関10のプラグホール81の先端開口端811よりも基端側に配されている。【選択図】図1