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公开(公告)号：US08618725B2
公开(公告)日：2013-12-31
申请号：US13695721
申请日：2011-02-03
申请人： Daisuke Sumoyama , Tsutomu Shibata , Tomoo Tanaka
发明人： Daisuke Sumoyama , Tsutomu Shibata , Tomoo Tanaka
IPC分类号： H01T13/20
摘要： A spark plug includes a ceramic insulator, a center electrode, a metallic shell, and a ground electrode. The center electrode has a shoulder portion at a forward end portion, which tapers forward with respect to the axial direction. A noble metal tip is joined to the forward end portion of the center electrode through a fusion zone. A spark discharge gap is formed between the noble metal tip and the ground electrode. The shortest distance between the fusion zone and a forward end surface of the noble metal tip is 0.8-1.2 mm. The outside diameter of the fusion zone as measured at a forward end of the fusion zone is smaller than that as measured at a rear end of the fusion zone. An acute angle θ1 formed by a straight line L1 and a straight line L2 satisfies the relational expression θ1≦72°.
摘要翻译： 火花塞包括陶瓷绝缘体，中心电极，金属壳和接地电极。 中心电极在前端部具有相对于轴向向前变细的肩部。 贵金属端头通过熔接区域与中心电极的前端部接合。 在贵金属端头和接地电极之间形成火花放电间隙。 熔融区与贵金属端头的前端表面之间的最短距离为0.8-1.2mm。 在熔融区的前端处测量的熔融区的外径小于在熔融区的后端测量的外径。 由直线L1和直线L2形成的锐角θ1满足关系式θ1@ 72°。
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公开(公告)号：US20130069516A1
公开(公告)日：2013-03-21
申请号：US13695721
申请日：2011-02-03
申请人： Daisuke Sumoyama , Tsutomu Shibata , Tomoo Tanaka
发明人： Daisuke Sumoyama , Tsutomu Shibata , Tomoo Tanaka
IPC分类号： H01T13/39
摘要： A spark plug includes a ceramic insulator, a center electrode, a metallic shell, and a ground electrode. The center electrode has a shoulder portion at a forward end portion, which tapers forward with respect to the axial direction. A noble metal tip is joined to the forward end portion of the center electrode through a fusion zone. A spark discharge gap is formed between the noble metal tip and the ground electrode. The shortest distance between the fusion zone and a forward end surface of the noble metal tip is 0.8-1.2 mm. The outside diameter of the fusion zone as measured at a forward end of the fusion zone is smaller than that as measured at a rear end of the fusion zone. An acute angle θ1 formed by a straight line L1 and a straight line L2 satisfies the relational expression θ1≦72°.
摘要翻译： 火花塞包括陶瓷绝缘体，中心电极，金属壳和接地电极。 中心电极在前端部具有相对于轴向向前变细的肩部。 贵金属端头通过熔接区域与中心电极的前端部接合。 在贵金属端头和接地电极之间形成火花放电间隙。 熔融区与贵金属端头的前端表面之间的最短距离为0.8-1.2mm。 在熔融区的前端处测量的熔融区的外径小于在熔融区的后端测量的外径。 由直线L1和直线L2形成的锐角和角度1满足关系式：1＆nlE; 72°。
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公开(公告)号：US08878424B2
公开(公告)日：2014-11-04
申请号：US13369687
申请日：2012-02-09
申请人： Daisuke Sumoyama , Tomoo Tanaka , Tsutomu Shibata
发明人： Daisuke Sumoyama , Tomoo Tanaka , Tsutomu Shibata
IPC分类号： H01T13/39
CPC分类号： H01T13/39
摘要： A spark plug having an insulator that can be restrained from cracking in an environment of heating and cooling cycles. The spark plug includes an insulator having an axial bore extending in the direction of the axis, and a center electrode held in one end portion of the axial bore. The center electrode has an outer layer, and a core provided within the outer layer and formed from a material higher in thermal conductivity than the outer layer. After a heat treatment, the outer layer has a high-hardness region having a hardness of 190 Hv or higher and a thickness of 30 μm to 200 μm, and an element supply region having a thickness of 50 μm or more.
摘要翻译： 火花塞具有能够在加热和冷却循环的环境中被抑制的绝缘体。 火花塞包括具有在轴线方向上延伸的轴向孔的绝缘体和保持在轴向孔的一个端部中的中心电极。 中心电极具有外层，并且芯体设置在外层内，并且由比外层更高导热性的材料形成。 热处理后，外层具有硬度为190Hv以上，厚度为30μm〜200μm的高硬度区域，厚度为50μm以上的元件供给区域。
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公开(公告)号：US20120217864A1
公开(公告)日：2012-08-30
申请号：US13369687
申请日：2012-02-09
申请人： Daisuke Sumoyama , Tomoo Tanaka , Tsutomu Shibata
发明人： Daisuke Sumoyama , Tomoo Tanaka , Tsutomu Shibata
IPC分类号： H01T13/39
CPC分类号： H01T13/39
摘要： A spark plug having an insulator that can be restrained from cracking in an environment of heating and cooling cycles. The spark plug includes an insulator having an axial bore extending in the direction of the axis, and a center electrode held in one end portion of the axial bore. The center electrode has an outer layer, and a core provided within the outer layer and formed from a material higher in thermal conductivity than the outer layer. After a heat treatment, the outer layer has a high-hardness region having a hardness of 190 Hv or higher and a thickness of 30 μm to 200 μm, and an element supply region having a thickness of 50 μm or more.
摘要翻译： 火花塞具有能够在加热和冷却循环的环境中被抑制的绝缘体。 火花塞包括具有在轴线方向上延伸的轴向孔的绝缘体和保持在轴向孔的一个端部中的中心电极。 中心电极具有外层，并且芯体设置在外层内，并且由比外层更高导热性的材料形成。 热处理后，外层具有硬度为190Hv以上，厚度为30μm〜200μm的高硬度区域，厚度为50μm以上的元件供给区域。
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公开(公告)号：US20130026903A1
公开(公告)日：2013-01-31
申请号：US13638641
申请日：2011-01-18
IPC分类号： H01T13/39
摘要： An electrode tip located at an distal end of an electrode of a spark plug comprises Pd as a predominant component in an amount of 40 wt. % or more; at least one element of Ir, Ni, Co, and Fe, wherein, when the tip contains Ir, the amount of Ir is 0.5 wt. % to 20 wt. %, and when the tip contains at least one element of Ni, Co, and Fe, the amount of the at least one element is 0.5 wt. % to 40 wt. %; and at least one element of Pt, Re, Rh, and Ru in a total amount of 5 wt. % to 40 wt. %, wherein when the tip contains at least one element of Re, Rh, and Ru, the amount of the at least one element is 10 wt. % or less, and when the tip contains Pt, the amount of Pt is 16 wt. % to 40 wt. %. The electrode tip, which comprises Pd as the main component, has improved resistance to spark-caused wear and reduced occurrence of separation and cracking of the tip.
摘要翻译： 位于火花塞电极远端的电极末端包含Pd作为主要组分，其量为40wt。 ％ 或者更多; Ir，Ni，Co和Fe的至少一种元素，其中当尖端含有Ir时，Ir的量为0.5wt。 ％至20重量％ ％，并且当尖端含有Ni，Co和Fe中的至少一种元素时，至少一种元素的量为0.5wt。 ％至40重量％ ％; 以及总量为5重量％的Pt，Re，Rh和Ru中的至少一种元素。 ％至40重量％ ％，其中当尖端包含Re，Rh和Ru中的至少一种元素时，至少一种元素的量为10wt。 ％以下，当尖端含有Pt时，Pt的量为16重量％。 ％至40重量％ ％。 包含Pd作为主要成分的电极头具有提高的耐火花引起的磨损，减少了尖端分离和破裂的发生。
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公开(公告)号：US08283846B2
公开(公告)日：2012-10-09
申请号：US13259219
申请日：2010-10-15
CPC分类号： H01T13/39 , C22C19/058
摘要： The object of the invention is to provide a spark plug including a central electrode and/or a ground electrode with a gap, which can suppress generation of corrosion-like generated foreign substances while maintaining high thermal conductivity and high strength. The gap between the central electrode and the ground electrode with at least one of the central electrode and the ground electrode formed from an electrode material including 96% by mass or more of Ni, in which the electrode material includes a total content of from 0.05% by mass to 0.45% by mass of at least one selected from a group consisting of Y and rare earth elements, 0.05% by mass or more of Mn, and a total content of 0.01% by mass or more of at least one selected from a group consisting of Ti, V, and Nb, and the ratio (a/b) of the total content (a) of Ti, V, and Nb to the content (b) of Mn is from 0.02 to 0.40.
摘要翻译： 本发明的目的是提供一种火花塞，其包括具有间隙的中心电极和/或接地电极，其可以在保持高导热性和高强度的同时抑制腐蚀状产生的异物的产生。 中心电极和接地电极之间的间隙由中心电极和接地电极中的至少一个由包含96质量％以上的Ni的电极材料形成，其中电极材料的总含量为0.05％ 以质量计至0.45质量％的选自Y和稀土元素中的至少一种，Mn为0.05质量％以上，总含量为0.01质量％以上的至少一种选自 由Ti，V和Nb组成的组中，Ti，V和Nb的总含量（a）与Mn的含量（b）的比（a / b）为0.02〜0.40。
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公开(公告)号：US20130200774A1
公开(公告)日：2013-08-08
申请号：US13877352
申请日：2011-10-06
申请人： Takaaki Kikai , Tomoo Tanaka , Tsutomu Shibata , Kaori Suzuki , Takehito Kuno
发明人： Takaaki Kikai , Tomoo Tanaka , Tsutomu Shibata , Kaori Suzuki , Takehito Kuno
摘要： A spark plug includes a ceramic insulator having an axial hole formed in an axis direction of the spark plug, a center electrode inserted in a front side of the axial hole, a metal shell disposed around the ceramic insulator and a ground electrode joined to a front end portion of the metal shell, wherein the ground electrode has a cross-sectional area of 2.0 mm2 or smaller in any arbitrary cross section thereof taken in a direction perpendicular to a center line of the ground electrode; the ground electrode is made of a metal material containing 93 mass % or more of nickel; and the ground electrode has a Vickers hardness of 130 to 260 Hv.
摘要翻译： 火花塞包括陶瓷绝缘体，其具有形成在火花塞的轴线方向的轴向孔，插入在轴向孔的前侧的中心电极，设置在陶瓷绝缘体周围的金属壳和接合到前面的接地电极 所述金属壳的端部，其中所述接地电极在与所述接地电极的中心线垂直的方向上的任意截面中的截面面积为2.0mm 2以下; 接地电极由含有93质量％以上的镍的金属材料制成; 接地电极的维氏硬度为130〜260Hv。
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公开(公告)号：US20120013241A1
公开(公告)日：2012-01-19
申请号：US13259219
申请日：2010-10-15
IPC分类号： H01T13/39
CPC分类号： H01T13/39 , C22C19/058
摘要： The object of the invention is to provide a spark plug including a central electrode and/or a ground electrode, which can suppress generation of corrosion-like generated foreign substances while maintaining high thermal conductivity and high strength.The spark plug according to the invention is a spark plug including a central electrode and a ground electrode provided to have a gap between the central electrode and the ground electrode with at least one of the central electrode and the ground electrode formed from an electrode material including 96% by mass or more of Ni, in which the electrode material includes a total content of from 0.05% by mass to 0.45% by mass of at least one selected from a group consisting of Y and rare earth elements, 0.05% by mass or more of Mn, and a total content of 0.01% by mass or more of at least one selected from a group consisting of Ti, V, and Nb, and the ratio (a/b) of the total content (a) of Ti, V, and Nb to the content (b) of Mn is from 0.02 to 0.40.
摘要翻译： 本发明的目的是提供一种包括中心电极和/或接地电极的火花塞，其能够在保持高导热性和高强度的同时抑制腐蚀状产生的异物的产生。 根据本发明的火花塞是火花塞，其包括中心电极和接地电极，设置成在中心电极和接地电极之间具有间隙，中心电极和接地电极中的至少一个由电极材料形成，包括 96质量％以上的Ni，其中电极材料的总含量为0.05质量％至0.45质量％的选自Y和稀土元素中的至少一种，0.05质量％或 更多的Mn，以及选自Ti，V和Nb中的至少一种的0.01质量％以上的总含量，Ti的总含量（a）的比（a / b） V和Nb相对于Mn的含量（b）为0.02〜0.40。
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公开(公告)号：US08664842B2
公开(公告)日：2014-03-04
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
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。
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公开(公告)号：US09768588B2
公开(公告)日：2017-09-19
申请号：US13877352
申请日：2011-10-06
申请人： Takaaki Kikai , Tomoo Tanaka , Tsutomu Shibata , Kaori Suzuki , Takehito Kuno
发明人： Takaaki Kikai , Tomoo Tanaka , Tsutomu Shibata , Kaori Suzuki , Takehito Kuno
摘要： A spark plug includes a ceramic insulator having an axial hole formed in an axis direction of the spark plug, a center electrode inserted in a front side of the axial hole, a metal shell disposed around the ceramic insulator and a ground electrode joined to a front end portion of the metal shell, wherein the ground electrode has a cross-sectional area of 2.0 mm2 or smaller in any arbitrary cross section thereof taken in a direction perpendicular to a center line of the ground electrode; the ground electrode is made of a metal material containing 93 mass % or more of nickel; and the ground electrode has a Vickers hardness of 130 to 260 Hv.
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