发明名称 |
SPARK PLUG FOR INTERNAL COMBUSTION ENGINE AND METHOD OF MANUFACTURING THE SPARK PLUG |
摘要 |
A spark plug includes a center electrode, a ground electrode, and a noble metal tip. The noble metal tip is joined to an object member of at least one of two electrodes via a fusion zone. A projected overlap region of the noble metal tip and the fusion zone accounts for 70% or more of a projected region of the noble metal tip. The object member contains at least Si out of Al and Si such that the amount of Si is 0.4% by mass or higher and such that the total amount of Al and Si is 0.5% by mass. Multi-fusion spots exist on the surface of the fusion zone. Segments of a baseline which pass through the respective multi-fusion spots have a total length of a predetermined percentage of the length of the baseline. Joining strength to the noble metal tip can thereby be greatly improved when the member to be joined contains Si.
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申请公布号 |
US2013038198(A1) |
申请公布日期 |
2013.02.14 |
申请号 |
US201113641611 |
申请日期 |
2011.04.15 |
申请人 |
NGK SPARK PLUG CO., LTD;TORII KAZUYOSHI;SUZUKI AKIRA;MUSASA MAMORU |
发明人 |
TORII KAZUYOSHI;SUZUKI AKIRA;MUSASA MAMORU |
分类号 |
H01T13/39;H01T21/02 |
主分类号 |
H01T13/39 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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