发明名称 |
A spark plug for use in an internal combustion engine. |
摘要 |
<p>In a spark plug having a nickel-based electrode whose front end has a firing tip made from a ruthenium- or iridium-based metal in which an oxide of a rare earth metal group is dispersed, the firing tip is welded to the electrode by a solidified alloy layer having a component of the electrode and a component of the firing tip. The firing tip contains the oxide of the rare earth metal group in a range of 5 SIMILAR 15 % by volume (V), and an average grain size (D) of the oxide is in a range of 0.05 SIMILAR 3.0 mu m with a quantitative relationship as D </= -0.34V + 5.1. <IMAGE></p> |
申请公布号 |
EP0635920(A1) |
申请公布日期 |
1995.01.25 |
申请号 |
EP19940304783 |
申请日期 |
1994.06.30 |
申请人 |
NGK SPARK PLUG CO., LTD |
发明人 |
OSHIMA, TAKAFUMI, C/O NGK SPARK PLUG CO., LTD. |
分类号 |
H01T13/20;H01T13/39;H01T21/02;(IPC1-7):H01T13/39 |
主分类号 |
H01T13/20 |
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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