公开(公告)号：US20130334954A1

公开(公告)日：2013-12-19

申请号：US13914804

申请日：2013-06-11

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kenji Moritani ,  Hiroaki Nasu ,  Makoto Sugita

IPC: H01T13/20

CPC classification number: H01T13/20 ,  H01T21/02

Abstract: A spark plug includes an insulator extending along an axis and a metal shell provided on the outer periphery of the insulator. The metal shell includes a thread portion for threadedly engaging with a mounting hole of an internal combustion engine and a seat portion having a tapered surface whose outer diameter decreases gradually toward a leading end side. The tapered surface contacts with a bearing surface of the internal combustion engine when the thread portion is engaged with the mounting hole. Annular protruding portions or a helical protruding portion are formed within a range on the tapered surface from an outermost peripheral portion to a part forming an outer diameter occupying 95% of the diameter of the outermost peripheral portion. The arithmetic mean roughness of a surface of the tapered surface within the range is set to 1-5 μm on a section including the axis.

Abstract translation: 火花塞包括沿着轴线延伸的绝缘体和设置在绝缘体的外周上的金属壳。 金属壳包括用于与内燃机的安装孔螺纹接合的螺纹部分和具有锥形表面的座部，其外径朝向前端侧逐渐减小。 当螺纹部与安装孔接合时，锥面与内燃机的支承面接触。 环形突出部或螺旋形突出部形成在从最外周部到形成外径占最外周部的直径的95％的部分的锥形面的范围内。 该范围内的锥面的表面的算术平均粗糙度在包括轴的截面上设定为1-5μm。

公开(公告)号：US20130214669A1

公开(公告)日：2013-08-22

申请号：US13762723

申请日：2013-02-08

Applicant: NGK Spark Plug Co., Ltd.

Inventor： Kazuhiro Kodama ,  Hiroaki Nasu

IPC: H01T13/39

CPC classification number: H01T13/39

Abstract: A spark plug includes a tubular metal shell extending in an axial direction, wherein the metal shell includes: an externally threaded portion formed on a tip end side of an outer periphery of the metal shell; a seat portion formed on a rear end side of the externally threaded portion in the axial direction and protruding radially outward; and a nickel layer provided on an outer surface of the metal shell, wherein the nickel layer contains phosphorus, and a phosphorus concentration in a portion in which a nickel concentration is 50 at % in a thickness direction of the nickel layer itself is 6 at % or more and 20 at % or less.

Abstract translation: 火花塞包括沿轴向延伸的管状金属壳，其中所述金属壳包括：形成在所述金属壳的外周的末端侧的外螺纹部; 座部，其形成在所述外螺纹部的轴向的后端侧，并且径向向外突出; 以及设置在所述金属壳的外表面上的镍层，其中，所述镍层含有磷，镍层本身的厚度方向的镍浓度为50原子％的部分的磷浓度为6原子％ 以上且20at％以下。

公开(公告)号：US08704434B2

公开(公告)日：2014-04-22

申请号：US13914804

申请日：2013-06-11

Applicant: NGK Spark Plug Co., Ltd.

Inventor： Kenji Moritani ,  Hiroaki Nasu ,  Makoto Sugita

IPC: H01T13/04

CPC classification number: H01T13/20 ,  H01T21/02

Abstract: A spark plug includes an insulator extending along an axis and a metal shell provided on the outer periphery of the insulator. The metal shell includes a thread portion for threadedly engaging with a mounting hole of an internal combustion engine and a seat portion having a tapered surface whose outer diameter decreases gradually toward a leading end side. The tapered surface contacts with a bearing surface of the internal combustion engine when the thread portion is engaged with the mounting hole. Annular protruding portions or a helical protruding portion are formed within a range on the tapered surface from an outermost peripheral portion to a part forming an outer diameter occupying 95% of the diameter of the outermost peripheral portion. The arithmetic mean roughness of a surface of the tapered surface within the range is set to 1-5 μm on a section including the axis.

Abstract translation: 火花塞包括沿着轴线延伸的绝缘体和设置在绝缘体的外周上的金属壳。 金属壳包括用于与内燃机的安装孔螺纹接合的螺纹部分和具有锥形表面的座部，其外径朝向前端侧逐渐减小。 当螺纹部与安装孔接合时，锥面与内燃机的支承面接触。 环形突出部或螺旋形突出部形成在从最外周部到形成外径占最外周部的直径的95％的部分的锥形面的范围内。 该范围内的锥面的表面的算术平均粗糙度在包含该轴的截面上被设定为1-5μm。

公开(公告)号：US08946976B2

公开(公告)日：2015-02-03

申请号：US14050471

申请日：2013-10-10

Applicant: NGK Spark Plug Co., Ltd.

Inventor： Kazuhiro Kodama ,  Hiroaki Nasu

IPC: H01T13/32 ,  H01T13/39 ,  H01T13/20

CPC classification number: H01T13/20 ,  H01T13/32 ,  H01T13/39

Abstract: A spark plug includes a metal shell, a ground electrode joined to a front end portion of the metal shell and a nickel layer formed on the ground electrode, wherein the ground electrode has a base material exposed region in which a base material of the ground electrode is exposed; and wherein the nickel layer includes an outer-lateral-side nickel layer located on an outer lateral surface of the ground electrode at a position adjacent to the base material exposed region and satisfies a condition of LA≧25 μm, where LA is a length from a first part of the outer-lateral-side nickel layer having a thickness equal to 80% of a maximum thickness of the outer-lateral-side nickel layer to a second part of the outer-lateral-side nickel layer having a thickness equal to 20% of the maximum thickness of the outer-lateral-side nickel layer in a longitudinal direction of the ground electrode.

Abstract translation: 火花塞包括金属壳，与金属壳的前端部接合的接地电极和形成在接地电极上的镍层，其中接地电极具有基材暴露区域，接地电极的基材 被暴露 并且其中所述镍层包括位于所述接地电极的外侧表面上的外侧侧镍层，所述外侧镍层位于与所述基材暴露区域相邻的位置处，并且满足LA≥25μm的条件，其中LA为 外侧镍层的厚度等于外侧镍层的最大厚度的80％的厚度等于外侧镍层的第二部分的厚度的第一部分 外侧镍层在接地电极的长度方向上的最大厚度的20％。

公开(公告)号：US20140117833A1

公开(公告)日：2014-05-01

申请号：US14050471

申请日：2013-10-10

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kazuhiro Kodama ,  Hiroaki Nasu

IPC: H01T13/20

CPC classification number: H01T13/20 ,  H01T13/32 ,  H01T13/39

Abstract: A spark plug includes a metal shell, a ground electrode joined to a front end portion of the metal shell and a nickel layer formed on the ground electrode, wherein the ground electrode has a base material exposed region in which a base material of the ground electrode is exposed; and wherein the nickel layer includes an outer-lateral-side nickel layer located on an outer lateral surface of the ground electrode at a position adjacent to the base material exposed region and satisfies a condition of LA≧25 μm, where LA is a length from a first part of the outer-lateral-side nickel layer having a thickness equal to 80% of a maximum thickness of the outer-lateral-side nickel layer to a second part of the outer-lateral-side nickel layer having a thickness equal to 20% of the maximum thickness of the outer-lateral-side nickel layer in a longitudinal direction of the ground electrode.

Abstract translation: 火花塞包括金属壳，与金属壳的前端部接合的接地电极和形成在接地电极上的镍层，其中接地电极具有基材暴露区域，接地电极的基材 被暴露 并且其中所述镍层包括位于所述接地电极的外侧表面上的外侧侧镍层，所述外侧镍层位于与所述基材暴露区域相邻的位置处，并且满足LA≥25μm的条件，其中LA为 外侧镍层的厚度等于外侧镍层的最大厚度的80％的厚度等于外侧镍层的第二部分的厚度的第一部分 外侧镍层在接地电极的长度方向上的最大厚度的20％。

公开(公告)号：US08593046B2

公开(公告)日：2013-11-26

申请号：US13762723

申请日：2013-02-08

Applicant: NGK Spark Plug Co., LTD.

Inventor： Kazuhiro Kodama ,  Hiroaki Nasu

IPC: H01T13/39

CPC classification number: H01T13/39

Abstract: A spark plug includes a tubular metal shell extending in an axial direction, wherein the metal shell includes: an externally threaded portion formed on a tip end side of an outer periphery of the metal shell; a seat portion formed on a rear end side of the externally threaded portion in the axial direction and protruding radially outward; and a nickel layer provided on an outer surface of the metal shell, wherein the nickel layer contains phosphorus, and a phosphorus concentration in a portion in which a nickel concentration is 50 at % in a thickness direction of the nickel layer itself is 6 at % or more and 20 at % or less.

Abstract translation: 火花塞包括沿轴向延伸的管状金属壳，其中所述金属壳包括：形成在所述金属壳的外周的末端侧的外螺纹部; 座部，其形成在所述外螺纹部的轴向的后端侧，并且径向向外突出; 以及设置在所述金属壳的外表面上的镍层，其中，所述镍层含有磷，镍层本身的厚度方向的镍浓度为50原子％的部分的磷浓度为6原子％ 以上且20at％以下。