SPARK PLUG FOR INTERNAL COMBUSTION ENGINE AND MANUFACTURING METHOD FOR THE SAME, AS WELL AS INTERNAL COMBUSTION ENGINE
To provide a spark plug for an internal combustion engine that can improve productivity, and a manufacturing method for the same, as well as the internal combustion engine.SOLUTION: In a spark plug 1, a plug cover 5 is provided at an end part of a housing 2 so as to cover a sub-combustion chamber 50...
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Main Author | |
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Format | Patent |
Language | English Japanese |
Published |
15.12.2022
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Subjects | |
Online Access | Get full text |
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Summary: | To provide a spark plug for an internal combustion engine that can improve productivity, and a manufacturing method for the same, as well as the internal combustion engine.SOLUTION: In a spark plug 1, a plug cover 5 is provided at an end part of a housing 2 so as to cover a sub-combustion chamber 50 where a discharge gap G is disposed. In the plug cover 5, an injection hole 51 for communicating between the sub-combustion chamber 50 and the outside is formed. The ground electrode 6 is fixed to an inner wall surface 21 of the housing 2. The ground electrode 6 protrudes into the sub-combustion chamber 50 from a fixed end part 62 fixed to the inner wall surface 21. The discharge gap G is formed by an end part of a center electrode 4 and a base end surface 61 of the ground electrode 6 facing each other in a plug axis direction Z. In addition, the discharge gap G is formed on the base end side relative to the end of the housing 2.SELECTED DRAWING: Figure 1
【課題】生産性を向上させることができる内燃機関用のスパークプラグ及びその製造方法、並びに内燃機関を提供すること。【解決手段】スパークプラグ1において、プラグカバー5は、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ている。プラグカバー5には、副燃焼室50と外部とを連通させる噴孔51が形成されている。接地電極6は、ハウジング2の内壁面21に固定されている。接地電極6は、内壁面21に固定された固定端部62から副燃焼室50内に突出している。放電ギャップGは、中心電極4の先端部と接地電極6の基端面61とがプラグ軸方向Zに互いに対向することにより形成されている。放電ギャップGは、ハウジング2の先端よりも基端側に形成されている。【選択図】図1 |
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Bibliography: | Application Number: JP20210093962 |