公开(公告)号：US20090309474A1

公开(公告)日：2009-12-17

申请号：US12482021

申请日：2009-06-10

申请人： Kenji NUNOME

发明人： Kenji NUNOME

IPC分类号： H01T13/20

CPC分类号： H01T13/20 ,  H01T13/38 ,  H01T13/52

摘要： A spark plug has a center electrode, a ceramic insulator having an axial hole to support the center electrode therein, a metal shell holding the ceramic insulator, and a ground electrode, one end portion of which is fixedly connected with the metal shell, the other end portion of which is located apart from an outer circumferential surface of a top end portion of the center electrode for defining a spark discharge gap therebetween. The ceramic insulator is provided with recesses at an edge portion between a top end surface of the ceramic insulator and an inner circumferential surface of the axial hole. When defining first and second imaginary circles with the axis being their respective centers as circles passing through portions of the recesses whose radial distances from the axis are a maximum and a minimum respectively, a difference of diameters of the first and second imaginary circles is 0.08 mm or less.

摘要翻译： 火花塞具有中心电极，具有用于支撑中心电极的轴向孔的陶瓷绝缘体，保持陶瓷绝缘体的金属壳和一个端部与金属壳固定连接的接地电极，另一端与金属壳固定连接 其端部与中心电极的顶端部分的外圆周表面分开，以限定它们之间的火花放电间隙。 陶瓷绝缘体在陶瓷绝缘体的顶端面与轴孔的内周面之间的边缘部分设置有凹部。 当定义第一和第二假想圆时，轴为其各自的中心，如圆形通过凹槽的径向距离分别为最大和最小的部分，第一和第二假想圆的直径差为0.08毫米 或更少。

公开(公告)号：US20070222351A1

公开(公告)日：2007-09-27

申请号：US11686128

申请日：2007-03-14

申请人： Kenji Nunome

发明人： Kenji Nunome

IPC分类号： H01T13/20

CPC分类号： H01T13/38 ,  B28B1/30 ,  B28B3/003 ,  B28B11/0863 ,  H01T13/20 ,  H01T21/02

摘要： A plurality of insulator samples of different dimensions are subjected to multiple regression analysis to thereby induce an expression for estimating the amount of unevenness in wall thickness of an insulator; specifically, 0.01 (17.527+0.141A−0.285B−6.124C−0.14D+1.105E), where A is an overall length of the insulator, B is the outside diameter of a rear trunk portion of the insulator, C is the diameter of a large diameter portion of the axial bore of the insulator, D is the length of the large diameter portion of the bore, and E is the diameter of a small diameter portion of the axial bore. The insulator is designed such that the amount of unevenness in wall thickness thereof estimated through calculation by this expression is less than 0.07 mm.

摘要翻译： 将多个不同尺寸的绝缘体样品进行多元回归分析，从而引起用于估计绝缘体的壁厚不均匀量的表达式; 具体地，0.01（17.527 + 0.141A-0.285B-6.124C-0.14D + 1.105E），其中A是绝缘子的总长度，B是绝缘体的后主体部分的外径，C是直径 绝缘体的轴向孔的大直径部分，D是孔的大直径部分的长度，E是轴向孔的小直径部分的直径。 绝缘子被设计成使得通过该表达式的计算估计出的壁厚不均匀量小于0.07mm。

公开(公告)号：US20120293061A1

公开(公告)日：2012-11-22

申请号：US13515627

申请日：2011-01-11

申请人： Tomoo Tanaka ,  Tsutomu Shibata ,  Osamu Yoshimoto ,  Takaaki Kikai ,  Takehito Kuno ,  Kenji Nunome

发明人： Tomoo Tanaka ,  Tsutomu Shibata ,  Osamu Yoshimoto ,  Takaaki Kikai ,  Takehito Kuno ,  Kenji Nunome

IPC分类号： H01T13/39

CPC分类号： H01T13/39 ,  H01T13/32

摘要： A spark plug including a center electrode and a ground electrode having a gap between the center electrode and the ground electrode, the ground electrode has an outer layer which is formed from an Ni-based alloy and a core portion which is covered by the outer layer and formed from a material having a thermal conductivity higher than that of the outer layer. Further, the melting point of the Ni-based alloy forming the outer layer is 1150° C. or more and 1350° C. or less.

摘要翻译： 一种火花塞，其包括中心电极和接地电极，所述接地电极在所述中心电极和所述接地电极之间具有间隙，所述接地电极具有由Ni基合金形成的外层和被所述外层覆盖的芯部分 并且由具有高于外层的热导率的材料形成。 此外，形成外层的Ni系合金的熔点为1150℃以上且1350℃以下。

公开(公告)号：US08164243B2

公开(公告)日：2012-04-24

申请号：US12474558

申请日：2009-05-29

申请人： Kenji Nunome ,  Yoshikuni Sato

发明人： Kenji Nunome ,  Yoshikuni Sato

IPC分类号： H01T13/20

CPC分类号： H01T13/39 ,  H01T21/02

摘要： A spark plug having a center electrode; an insulator having an axial hole extending in the direction of an axis; a metallic shell; a ground electrode extending from a front end portion of the metallic shell; a center-electrode-side noble metal chip joined to a distal end surface of the center electrode; and a ground-electrode-side noble metal chip joined to a distal end surface of the ground electrode, the ground-electrode-side noble metal chip having a distal end surface facing toward a side surface portion of the center-electrode-side noble metal chip, and the ground electrode being bent at an angle that falls within a range of 120° to 140° inclusive.

摘要翻译： 具有中心电极的火花塞; 具有沿轴线方向延伸的轴向孔的绝缘体; 金属壳; 从所述金属壳的前端部延伸的接地电极; 接合到所述中心电极的远端表面的中心电极侧贵金属芯片; 以及与接地电极的前端面接合的接地电极侧贵金属芯片，具有与中心电极侧贵金属的侧面部相对的前端面的接地电极侧贵金属芯片 芯片，并且接地电极以包含120°至140°的范围内的角度弯曲。

公开(公告)号：US20110043093A1

公开(公告)日：2011-02-24

申请号：US12989586

申请日：2009-04-23

申请人： Kenji Nunome

发明人： Kenji Nunome

IPC分类号： H01T13/20

CPC分类号： H01T13/39

摘要： A spark plug (100) including a noble metal tip (80) disposed on a distal end portion (31) of a ground electrode (30). The noble metal tip (80) is joined to the top surface of an intermediate member (81), which is a member separate from the ground electrode (30). The bottom surface of the intermediate member (81) is joined to the ground electrode (30), whereby the noble metal tip (80) is fixed to the ground electrode (30). The intermediate member (81) is formed such that its average hardness is higher than the average hardness of a portion of the ground electrode (30), excluding an intermediate portion (33) to be bent.

摘要翻译： 一种火花塞（100），包括设置在接地电极（30）的远端部分（31）上的贵金属端头（80）。 贵金属端头（80）与作为与接地电极（30）分离的部件的中间部件（81）的顶面接合。 中间部件（81）的底面与接地电极（30）接合，由此将贵金属电极头（80）固定在接地电极（30）上。 中间构件81形成为除了被弯曲的中间部33以外，其平均硬度比接地电极30的一部分的平均硬度高。

公开(公告)号：US20090289540A1

公开(公告)日：2009-11-26

申请号：US12521206

申请日：2008-04-17

申请人： Kenji Nunome ,  Yoshikuni Sato

发明人： Kenji Nunome ,  Yoshikuni Sato

IPC分类号： H01T13/20

CPC分类号： H01T13/32 ,  C22C5/04 ,  H01T13/39

摘要： A spark plug comprising a center electrode, a first noble metal tip joined to the center electrode, an insulator, a metallic shell, a ground electrode joined to the metallic shell and including an outer layer and an inner layer, and a second noble metal tip joined to the ground electrode by way of a melted portion, wherein in a cross section of the ground electrode, the protrusion height A of the second noble metal tip is 0.4 mm or more, the ground electrode includes a substantially flat joining surface to which the second noble metal tip is joined and an outwardly curved surface, the inner layer has at the joining surface side a substantially flat surface or recessed surface, and the minimum distance F between the melted portion and the inner layer is 0.1 mm or more.

摘要翻译： 一种火花塞，包括中心电极，连接到中心电极的第一贵金属电极头，绝缘体，金属壳体，与金属壳体接合并包括外层和内层的接地电极和第二贵金属电极头 通过熔融部分接合到接地电极，其中在接地电极的横截面中，第二贵金属电极头的突出高度A为0.4mm或更大，接地电极包括基本平坦的接合表面， 第二贵金属端头接合并且向外弯曲的表面，内层在接合表面侧具有基本上平坦的表面或凹陷表面，并且熔化部分和内层之间的最小距离F为0.1mm以上。

公开(公告)号：US07432641B2

公开(公告)日：2008-10-07

申请号：US11686128

申请日：2007-03-14

申请人： Kenji Nunome

发明人： Kenji Nunome

IPC分类号： H01T13/20

CPC分类号： H01T13/38 ,  B28B1/30 ,  B28B3/003 ,  B28B11/0863 ,  H01T13/20 ,  H01T21/02

摘要： A plurality of insulator samples of different dimensions are subjected to multiple regression analysis to thereby induce an expression for estimating the amount of unevenness in wall thickness of an insulator; specifically, 0.01 (17.527+0.141A−0.285B−6.124C−0.14D+1.105E), where A is an overall length of the insulator, B is the outside diameter of a rear trunk portion of the insulator, C is the diameter of a large diameter portion of the axial bore of the insulator, D is the length of the large diameter portion of the bore, and E is the diameter of a small diameter portion of the axial bore. The insulator is designed such that the amount of unevenness in wall thickness thereof estimated through calculation by this expression is less than 0.07 mm.

摘要翻译： 将多个不同尺寸的绝缘体样品进行多元回归分析，从而引起用于估计绝缘体的壁厚不均匀量的表达式; 具体地，0.01（17.527 + 0.141A-0.285B-6.124C-0.14D + 1.105E），其中A是绝缘子的总长度，B是绝缘体的后主体部分的外径，C是直径 绝缘体的轴向孔的大直径部分，D是孔的大直径部分的长度，E是轴向孔的小直径部分的直径。 绝缘子被设计成使得通过该表达式的计算估计出的壁厚不均匀量小于0.07mm。

公开(公告)号：US07279827B2

公开(公告)日：2007-10-09

申请号：US10519075

申请日：2004-03-22

申请人： Kenji Nunome ,  Osamu Yoshimoto ,  Wataru Matsutani ,  Yoshihiro Matsubara

发明人： Kenji Nunome ,  Osamu Yoshimoto ,  Wataru Matsutani ,  Yoshihiro Matsubara

IPC分类号： H01T13/20

CPC分类号： H01T13/39 ,  B22F2998/10 ,  C22C1/0466 ,  B22F3/02 ,  B22F3/15

摘要： An object of the invention is to provide a higher-durability spark plug provided with a center electrode and a side electrode. At least one of the center electrode and the side electrode includes a precious metal member facing a spark discharge gap between the electrodes. A sweating phenomenon of the precious metal member can be suppressed while spark abrasion, oxidation abrasion and abnormal abrasion of the precious metal member are suppressed. The precious metal member contains Ir as a main component, and smaller amounts of Rh, Ru, and Ni.

摘要翻译： 本发明的目的是提供一种设置有中心电极和侧面电极的耐久性更高的火花塞。 中心电极和侧面电极中的至少一个包括面对电极之间的火花放电间隙的贵金属构件。 可以抑制贵金属构件的出汗现象，同时抑制贵金属构件的火花磨损，氧化磨损和异常磨损。 贵金属构件含有Ir作为主要成分，较少量的Rh，Ru，Ni。