Title:
内燃機関用のスパークプラグ及び内燃機関
Document Type and Number:
Japanese Patent JP7415710
Kind Code:
B2
Abstract:
To provide a spark plug for an internal combustion, capable of easily increasing life, and provide the internal combustion with the same.SOLUTION: A spark plug 1 for an internal combustion, includes: a cylindrical insulator 3; a center electrode 4 held in an inner peripheral side of the cylindrical insulator 3 and projecting a tip end projection part 41 on a tip end side of the cylindrical insulator 3; a cylindrical housing 2 holding the cylindrical insulator 3 in the inner peripheral side; a cover part 5 provided to the tip end part of the housing 2 so as to cover at least one part of the tip end projection part 41; and a ground electrode 6 jointed to the cover part 5. A penetration hole 7 penetrating a sub-combustion chamber 50 with an external part is formed in the cover part 5. The ground electrode 6 is projected to the sub-combustion chamber 50 while being jointed to the inner peripheral surface of the penetration hole 7 in the cover part 5. The ground electrode 6 includes a discharge surface 61 forming a discharge gap G between the center electrode 4 and itself on the penetration hole 7 side.SELECTED DRAWING: Figure 1
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Inventors:
Akimitsu Sugiura
Application Number:
JP2020050347A
Publication Date:
January 17, 2024
Filing Date:
March 20, 2020
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H01T13/54; F02B23/08; F02P15/00; H01T13/20; H01T13/32
Domestic Patent References:
| JP2014132535A | ||||
| JP201556258A | ||||
| JP62145678A | ||||
| JP1274374A |
Attorney, Agent or Firm:
Patent Attorney Corporation Aichi International Patent Office