Title:
内燃機関用のスパークプラグ
Document Type and Number:
Japanese Patent JP7452269
Kind Code:
B2
Abstract:
A spark plug includes: a cylindrical insulator; a center electrode, held on an inner circumferential side of the insulator, protruding from the insulator toward a tip end side; a cylindrical housing holding the insulator on an inner circumferential side; a ground electrode forming a discharge gap between the ground electrode and the center electrode on the inner circumferential side of the housing; and a plug cover provided in a tip end portion of the housing to cover a pre-combustion chamber in which the discharge gap is arranged. The plug cover is provided with an injection hole that communicates the pre-combustion chamber to the outside. The ground electrode includes a discharge-side end portion that faces the discharge gap and a joining-side end portion that is joined to the housing. The discharge-side end portion is arranged further toward a base end side in an axial direction than the joining-side end portion is.
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Inventors:
Akimitsu Sugiura
Application Number:
JP2020100406A
Publication Date:
March 19, 2024
Filing Date:
June 09, 2020
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H01T13/32; H01T13/20; H01T13/54
Domestic Patent References:
| JP2015130302A | ||||
| JP2013143371A | ||||
| JP2014116181A | ||||
| JP2021170475A |
Attorney, Agent or Firm:
Patent Attorney Corporation Aichi International Patent Office