利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

163 条记录 (耗时 0.027 秒)

    SPARK PLUG
    8.
    发明公开
    SPARK PLUG 审中-公开

    公开(公告)号：EP3327882A1

    公开(公告)日：2018-05-30

    申请号：EP17204164.2

    申请日：2017-11-28

    申请人： NGK Spark Plug Co., Ltd.

    发明人： KANEMARU, Tomonori

    IPC分类号： H01T13/08 ,  F02P13/00 ,  H01T13/16

    CPC分类号： H01T13/20 ,  H01T13/08 ,  H01T13/16

    摘要： A cylindrical metal shell 15 extending in an axis direction has a seat portion 16 projecting radially outward, and an annular gasket 20 is disposed so as to oppose a front end surface 17 of the seat portion. A value G/S obtained by dividing an arithmetic average roughness G of a first surface 21 of the gasket, which comes into contact with the front end surface of the seat portion by an arithmetic average roughness S of the front end surface of the seat portion satisfies 0.5≤G/S≤2.0. The arithmetic average roughness G is not more than 0.16 µm, and an average of an area of a second surface 22 on a back side of the first surface and an area of the first surface is not more than 280 mm 2 .

    SPARK PLUG
    10.
    发明公开
    SPARK PLUG 审中-公开

    公开(公告)号：EP2916403A4

    公开(公告)日：2016-06-29

    申请号：EP13851072

    申请日：2013-06-13

    申请人： NGK SPARK PLUG CO

    发明人： KOBAYASHI TSUTOMU

    IPC分类号： H01T13/36 ,  H01T13/08 ,  H01T13/16 ,  H01T13/20

    CPC分类号： H01T13/36 ,  H01T13/02 ,  H01T13/08 ,  H01T13/16 ,  H01T13/20

    摘要： An object is to effectively enhance the heat conduction performances of an insulator and a center electrode to thereby suppress overheating of the insulator, etc. while preventing breakage of a tube portion more reliably. An ignition plug 1 includes a tubular ceramic insulator 2 and a metallic shell 3 having a protrusion 21 protruding radially inward. The ceramic insulator 2 has an engagement portion 14 which is engaged with a receiving surface 21A of the protrusion 21 and an intermediate trunk portion 12 extending rearward from the rear end of the engagement portion 14. The metallic shell 3 has a screw portion 15 located on the radially outer side of the protrusion 21 and having a screw diameter of 10 mm or less, and a tube portion 17 located on the radially outer side of the intermediate trunk portion 12. A ‰¤ 1.70 and B ‰¥ 1.20 are satisfied, where A is the thickness (mm) of the metallic shell 3 along a direction which passes through the center CP of the receiving surface 21A and is orthogonal to the axial line CL1 on a cross section including the axial line CL1, and B is the minimum thickness (mm) of the metallic shell 3 at the tube portion 17 along the direction orthogonal to the axial line CL1.