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1. 发明申请

US20120112619A1 SPARK PLUG AND METHOD OF MANUFACTURING THE SAME 有权
标题翻译：火花塞及其制造方法
公开(公告)号：US20120112619A1
公开(公告)日：2012-05-10
申请号：US13212668
申请日：2011-08-18
申请人： Yuji KASUYA , Masahiro INOUE
发明人： Yuji KASUYA , Masahiro INOUE
IPC分类号： H01T13/20 , H01T21/02
CPC分类号： H01T13/32 , H01T21/02
摘要： A buried portion (32B) buried from a junction target surface of a ground electrode (27) is provided in a noble metal tip (32). In a section, perpendicular to a central axis CL2 of the ground electrode (27), a large width portion (32W) is formed in the buried portion (32B), and a region between the junction target surface and a largest width region of the large width portion (32W) is formed into a shape which gradually increases in width, or into a shape having a region of the relevant shape and a constant width region. A region from the large width portion (32W) to a point of intersection P1, P2 is covered with a base material of the ground electrode (27) and a melt portion (35), and a thickness t1 (mm) of the noble metal tip (32) and a buried amount t2 (mm) satisfy 0.25≦t2/t1.
摘要翻译：在贵金属端头（32）上设有从接地电极（27）的接合靶表面埋设的埋入部（32B）。在垂直于接地电极（27）的中心轴线CL2的截面中，在埋入部分（32B）中形成大的宽度部分（32W），并且在接合靶表面和接合电极的最大宽度区域之间的区域大宽度部分（32W）形成为宽度逐渐增大的形状，或具有相关形状区域和恒定宽度区域的形状。从宽幅部（32W）到交点P1，P2的区域被接地电极（27）的基材和熔融部（35）覆盖，贵金属的厚度t1（mm）尖端（32）和埋入量t2（mm）满足0.25＆nlE; t2 / t1。

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