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    • 1. 发明授权
    • Spark plug
    • 火花塞
    • US08884503B2
    • 2014-11-11
    • US13881410
    • 2011-08-18
    • Satoshi NagasawaAkira Suzuki
    • Satoshi NagasawaAkira Suzuki
    • H01T13/32
    • H01T13/16H01T13/32
    • A spark plug has a metal shell and a ground electrode joined at a base end portion thereof to the metal shell and includes a surface layer and a core higher in thermal conductivity than the surface layer. The surface layer has a thickness of 0.2 to 0.4 mm at a specific position that is located 1 mm from the base end portion. The spark plug satisfies the following condition: W1≧W2×1.55−(W3+0.25) where W1 (mm) is a width of the metal shell at a weld region of the metal shell joined with the base end portion in a specific direction that extends perpendicular to the axis direction through a center line of the ground electrode; W2 (mm) is a thickness of the ground electrode at the specific position in the specific direction; and W3 (mm) is a thickness of the surface layer at the specific position in the specific direction.
    • 火花塞具有金属壳和接地电极,其基端部连接到金属壳,并且包括具有比表面层更高的导热性的表面层和芯。 表面层在距离基端部1mm位置的特定位置具有0.2〜0.4mm的厚度。 火花塞满足以下条件:W1≥W2×1.55-(W3 + 0.25)其中,W1(mm)是金属壳的与基端部的特定方向的焊接部的焊接部的宽度, 通过接地电极的中心线垂直于轴线方向延伸; W2(mm)是特定方向的特定位置处的接地电极的厚度; W3(mm)是特定方向的特定位置的表面层的厚度。
    • 2. 发明申请
    • SPARK PLUG
    • SPARK插头
    • US20130214671A1
    • 2013-08-22
    • US13881410
    • 2011-08-18
    • Satoshi NagasawaAkira Suzuki
    • Satoshi NagasawaAkira Suzuki
    • H01T13/32
    • H01T13/16H01T13/32
    • A spark plug has a metal shell and a ground electrode joined at a base end portion thereof to the metal shell and includes a surface layer and a core higher in thermal conductivity than the surface layer. The surface layer has a thickness of 0.2 to 0.4 mm at a specific position that is located 1 mm from the base end portion. The spark plug satisfies the following condition: W1≧W2×1.55−(W3+0.25) where W1 (mm) is a width of the metal shell at a weld region of the metal shell joined with the base end portion in a specific direction that extends perpendicular to the axis direction through a center line of the ground electrode; W2 (mm) is a thickness of the ground electrode at the specific position in the specific direction; and W3 (mm) is a thickness of the surface layer at the specific position in the specific direction.
    • 火花塞具有金属壳和接地电极,其基端部连接到金属壳,并且包括具有比表面层更高的导热性的表面层和芯。 表面层在距离基端部1mm位置的特定位置具有0.2〜0.4mm的厚度。 火花塞满足以下条件:W1> = W2×1.55-(W3 + 0.25)其中,W1(mm)是金属壳的与特定方向的基端部接合的金属壳的焊接部的宽度 其通过接地电极的中心线垂直于轴线方向延伸; W2(mm)是特定方向的特定位置处的接地电极的厚度; W3(mm)是特定方向的特定位置的表面层的厚度。