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    A spark plug for an internal combustion engine
    1.
    发明公开
    A spark plug for an internal combustion engine 失效
    内燃机的火花塞

    公开(公告)号：EP0812043A1

    公开(公告)日：1997-12-10

    申请号：EP97303906.8

    申请日：1997-06-06

    申请人： NGK Spark Plug Co. Ltd.

    发明人： Matsubara, Yoshihiro ,  Suzuki, Tetsushi ,  Hirano, Yuuji ,  Kazuya, Iwata

    IPC分类号： H01T13/14 ,  H01T13/08

    CPC分类号： H01T13/08 ,  H01T13/14

    摘要： In a spark plug having a cylindrical metal shell having a ground electrode; an insulator fixedly supported within the metal shell with a front end of the insulator extended beyond a front end of the metal shell, the insulator having an axial bore in which a center electrode is placed to form a spark gap with the ground electrode, the front end of the metal shell is adapted to be generally in flush with or somewhat inward into an inner wall of a combustion chamber of an internal combustion engine when the spark plug is mounted on a cylinder head of the internal combustion engine. The front end of the insulator extends at least 4.0 mm from the front end of the metal shell.

    摘要翻译： 在具有带接地电极的圆柱形金属壳的火花塞中; 绝缘体，所述绝缘体固定地支撑在所述金属壳内，所述绝缘体的前端延伸超出所述金属壳的前端，所述绝缘体具有轴向孔，其中放置中心电极以与所述接地电极形成火花隙; 当火花塞安装在内燃机的气缸盖上时，金属壳体的端部适于大致与内燃机的燃烧室的内壁齐平或稍微向内。 绝缘体的前端从金属壳体的前端延伸至少4.0mm。