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    Spark plug
    1.
    发明授权
    Spark plug 有权
    火花塞

    公开(公告)号：US06864622B2

    公开(公告)日：2005-03-08

    申请号：US10297201

    申请日：2002-03-27

    申请人： Wataru Matsutani ,  Masayuki Segawa ,  Satoko Ito ,  Osamu Yoshimoto

    发明人： Wataru Matsutani ,  Masayuki Segawa ,  Satoko Ito ,  Osamu Yoshimoto

    IPC分类号： H01T13/39 ,  H01T13/20

    CPC分类号： H01T13/39

    摘要： The object of the present invention is to provide a spark plug having a discharge portion formed of a noble-metal chip increased in the Ir content while reducing the content of expensive Rh, which can be restrained from generation of unusual wear in the form of eroding the circumferential side surface of the noble-metal chip and exhibits excellent wear resistance.In the present invention, the discharge portion (31) in the center electrode (3) side is formed of a noble-metal chip (31′) comprising an Ir-based alloy and the noble-metal chip (31′) contains 90% by weight or more of Ir as the main component and further contains 0.5% by weight or more of Rh and from 0.5 to 8% by weight of Ni, whereby the noble-metal chip (31′) [discharge portion (31)] can be ensured with good wear resistance, the generation of unusual wear which readily occurs on decreasing the Rh content can be prevented by the addition of Ni and in turn, a spark plug having high performance can be fabricated at a low cost.

    摘要翻译： 本发明的目的是提供一种火花塞，其具有由稀土金属芯片形成的放电部分，其中Ir含量增加，同时降低昂贵的Rh的含量，其可以以侵蚀的形式抑制异常磨损的产生 贵金属芯片的周向侧面，耐磨性优异。在本发明中，中心电极（3）侧的排出部（31）由包含Ir的贵金属芯片（31'）形成 的贵金属片（31'）含有作为主成分的Ir占90重量％以上，还含有0.5重量％以上的Rh和0.5〜8重量％的Ni， 可以确保具有良好的耐磨性的贵金属芯片（31'）[排出部分（31）]，可以通过添加Ni并且随后的火花来防止在减少Rh含量时容易发生的异常磨损的产生 可以以低成本制造具有高性能的插头。

    Spark plug
    2.
    发明授权
    Spark plug 有权
    火花塞

    公开(公告)号：US06664719B2

    公开(公告)日：2003-12-16

    申请号：US10106249

    申请日：2002-03-27

    申请人： Wataru Matsutani ,  Masayuki Segawa ,  Satoko Ito

    发明人： Wataru Matsutani ,  Masayuki Segawa ,  Satoko Ito

    IPC分类号： H01T1320

    CPC分类号： H01T13/39

    摘要： A spark plug having a discharge portion formed of a noble-metal chip, the spark plug being capable of restraining wear observed on a slenderized discharge portion in particular. Discharge portion (31) includes noble-metal chip (31′). Dimension D is 0.3-0.8 mm; and H is 0.4-2 mm, where D (mm) is a diameter representing the outside diameter of the noble-metal chip, and H (mm) is a discharge portion thickness representing the shortest distance between the periphery of a discharge face (31t) and a corresponding end edge of a weld zone W where a center electrode (3) and the noble-metal chip (31′) are welded. Further, the noble-metal chip (31′) contains a predominant amount of Ir and 0.5-8% by weight Ni.

    摘要翻译： 一种具有由贵金属芯片形成的放电部分的火花塞，该火花塞特别能够抑制在细长的放电部分上观察到的磨损。 放电部（31）包括贵金属芯片（31'）。 尺寸D为0.3-0.8mm; H为0.4-2mm，其中D（mm）为代表贵金属芯片外径的直径，H（mm）为排出面（31t）的周边之间的最短距离的排出部分厚度 ）和焊接区域W的对应的端部边缘，其中中心电极（3）和贵金属芯片（31'）被焊接。 此外，贵金属片（31'）含有主要量的Ir和0.5-8重量％的Ni。