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    Ignition plug
    2.
    发明授权
    Ignition plug 有权
    点火塞

    公开(公告)号：US08928214B2

    公开(公告)日：2015-01-06

    申请号：US14042836

    申请日：2013-10-01

    Applicant: NGK Spark Plug Co., Ltd.

    Inventor： Toshimasa Saji ,  Hirokazu Kurono ,  Toshitaka Honda

    IPC: H01T13/38 ,  H01T13/20 ,  H01T13/41

    CPC classification number: H01T13/41 ,  H01T13/20 ,  H01T13/38

    Abstract: An ignition plug, wherein, when a relative density of a portion of an insulator, which is positioned between a radial virtual plane including a front end of the insulator and a radial virtual plane including a front end of a portion of the insulator which is in contact with a metal shell or the plate packing, is referred to as A (%), and a relative density of a portion of the insulator, which is positioned between the radial virtual plane including the front end of the portion of the insulator which is in contact with the metal shell or the plate packing and a radial virtual plane including a center of a resistor in an axial direction, is referred to as B (%), the following equations are satisfied: 93.90≦A, and 0.10≦A−B≦0.90.

    Abstract translation: 一种火花塞，其中当位于包括绝缘体的前端的径向虚拟平面和包括位于绝缘体的部分的前端的径向虚拟平面之间的绝缘体的一部分的相对密度时 与金属壳体或板状填料接触，称为A（％），绝缘子的一部分的相对密度位于包含绝缘子部分的前端的径向虚拟平面之间 与金属壳或板状填料接触，将包含电阻体的轴向中心的径向虚拟平面称为B（％），满足以下等式：93.90＆nlE; A，0.10＆nlE; A-B＆nlE; 0.90。

    INSULATOR AND SPARK PLUG
    3.
    发明申请
    INSULATOR AND SPARK PLUG 有权
    绝缘子和火花塞

    公开(公告)号：US20140243184A1

    公开(公告)日：2014-08-28

    申请号：US14185952

    申请日：2014-02-21

    Applicant: NGK Spark Plug Co., Ltd.

    Inventor： Kengo Fujimura ,  Toshimasa Saji ,  Hirokazu Kurono ,  Toshitaka Honda

    IPC: H01T13/38

    CPC classification number: H01T13/38 ,  C04B35/111 ,  C04B35/6263 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3227 ,  C04B2235/3418 ,  C04B2235/5436 ,  C04B2235/5463 ,  C04B2235/77 ,  C04B2235/96 ,  H01B3/12

    Abstract: An insulator used in a spark plug having improved strength and dielectric strength performance. The insulator comprises a sintered compact whose main constituent is alumina. In the sintered compact, a content ratio of a rare earth element (R. E.) and a group 2 element (2A) satisfies 0.1≦R. E./2A≦1.4, and the content ratio of the R. E. and barium oxide (BaO) satisfies 0.2≦BaO/R. E.≦0.8. At least one virtual rectangular frame of 7.5 μm×50 μm surrounding crystals containing the rare earth element lies within a region of 630 μm×480 μm in any cross section of the sintered compact.

    Abstract translation: 用于具有改善的强度和介电强度性能的火花塞中的绝缘体。 绝缘体包括主要成分为氧化铝的烧结体。 在烧结体中，稀土元素（R.E）和第2族元素（2A）的含量比满足0.1＆lt; nlE; R。 E.2A≦̸ 1.4，并且R.E和氧化钡（BaO）的含量比满足0.2＆amp; nEE; BaO / R。 E.＆nlE; 0.8。 包含稀土元素的围绕晶体的7.5μm×50μm的至少一个虚拟矩形框架位于烧结体的任何横截面中的630μm×480μm的区域内。

    Spark plug
    4.
    发明授权
    Spark plug 有权

    公开(公告)号：US10193311B2

    公开(公告)日：2019-01-29

    申请号：US15669536

    申请日：2017-08-04

    Applicant: NGK Spark Plug Co., LTD.

    Inventor： Yutaka Yokoyama ,  Kuniharu Tanaka ,  Nobuyoshi Araki ,  Hirokazu Kurono ,  Toshimasa Saji ,  Yusuke Nomura ,  Jumpei Isasa

    IPC: C04B35/10 ,  H01T13/18 ,  H01T13/38 ,  H01B3/12 ,  C04B35/111 ,  C04B35/626 ,  C04B35/634

    Abstract: An alumina-based sintered body includes 92 mass % to 96 mass % of Al in terms of an oxide, and at least three elements selected from Group II elements, one of the at least three elements being 1.90 mass % or more of Ba in terms of an oxide. The alumina-based sintered body includes the following phases in a grain boundary phase present between alumina crystal grains: a first crystal phase containing Si and at least one of the Group II elements, and a second crystal phase containing Al and at least one of the Group II elements. In X-ray diffraction of the alumina-based sintered body, the maximum relative intensity of the first crystal phase and the maximum relative intensity of the second crystal phase are both 2 or above relative to the maximum diffraction intensity of the alumina crystal.

    Ignition plug
    6.
    发明授权
    Ignition plug 有权
    点火塞

    公开(公告)号：US08970098B1

    公开(公告)日：2015-03-03

    申请号：US14491262

    申请日：2014-09-19

    Applicant: NGK Spark Plug, Co., Ltd.

    Inventor： Toshimasa Saji ,  Hirokazu Kurono ,  Toshitaka Honda

    IPC: H01T13/20 ,  H01T13/38

    CPC classification number: H01T13/38 ,  H01T13/36

    Abstract: An ignition plug includes an insulator having an axial hole extending therethrough in the direction of an axis, a center electrode inserted into a forward end portion of the axial hole, and a metallic shell disposed externally of the insulator. The insulator includes a step portion engaged with an inner circumferential portion of the metallic shell and a leg portion extending forward from the forward end of the step portion. The porosity of the leg portion is 3.0% or less. Among three regions of the leg portion that are radially trisected in a cross section perpendicular to the axis, the outermost region is defined as a first region and the innermost region is defined as a second region. The porosity of the first region is equal to or more than 1.20 times the porosity of the second region.

    Abstract translation: 火花塞包括：绝缘体，其具有沿轴向延伸穿过的轴向孔，插入到轴向孔的前端部的中心电极和设置在绝缘体外部的金属壳。 绝缘体包括与金属壳的内周部接合的台阶部和从台阶部的前端向前延伸的脚部。 腿部的孔隙率为3.0％以下。 在垂直于轴线的横截面中径向三分的脚部分的三个区域中，最外侧区域被定义为第一区域，最内区域被定义为第二区域。 第一区域的孔隙率等于或大于第二区域的孔隙率的1.20倍。

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