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    Spark plug with high capability to ignite air-fuel mixture
    7.
    发明授权
    Spark plug with high capability to ignite air-fuel mixture 有权
    火花塞具有很高的燃烧空气燃料混合能力

    公开(公告)号：US07408294B2

    公开(公告)日：2008-08-05

    申请号：US11197437

    申请日：2005-08-05

    申请人： Shinichi Okabe ,  Tsunenobu Hori

    发明人： Shinichi Okabe ,  Tsunenobu Hori

    IPC分类号： H01J13/20

    CPC分类号： H01T13/20 ,  H01T13/38

    摘要： A spark plug according to the invention includes a metal shell, a hollow insulator, a center electrode, and a ground electrode. The insulator has a first end protruding into a combustion chamber of an engine and a second end opposite to the first end in the lengthwise direction of the insulator. The insulator increases in outer diameter from the edge of the inner surface thereof at the first end to a reference plane that is defined to extend perpendicular to the lengthwise direction of the insulator and away 0.1 mm from the edge of the inner surface of the insulator toward the second end of the same in the lengthwise direction. Further, a first volume V1, which is the volume of a portion of the insulator between the edge of the inner surface of the insulator and the reference plane, is in the range of 0.15 to 0.38 mm3.

    摘要翻译： 根据本发明的火花塞包括金属壳，中空绝缘体，中心电极和接地电极。 绝缘体具有突出到发动机的燃烧室中的第一端和与绝缘体的长度方向上的第一端相反的第二端。 绝缘体的外径从第一端的内表面的边缘增加到参考平面，该参考平面被限定为垂直于绝缘体的长度方向延伸并离开绝缘体的内表面的边缘0.1mm离开 长度方向的第二端相同。 此外，作为绝缘子的内表面的边缘与参考平面的绝缘体的一部分的体积的第一体积V 1在0.15至0.38mm 3范围内。 。