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公开(公告)号：US20170187170A1
公开(公告)日：2017-06-29
申请号：US15315105
申请日：2015-05-26
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Daisuke SUMOYAMA , Tatsuya GOZAWA , Magoki SHIMADATE , Yusuke KAWASHIMA
Abstract: An electrode tip for a spark plug, wherein Pt is contained as a main component, 7% by mass or more of Rh is contained, and a total content of Pt and Rh is greater than or equal to 95% by mass. The electrode tip includes: a narrow portion having the same cross-sectional shape in a direction of an axis; and a wide portion which is adjacent to the narrow portion and has a cross-sectional area, in a radial direction, which is greater than the narrow portion.
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公开(公告)号：US20170054274A1
公开(公告)日：2017-02-23
申请号：US15118954
申请日：2015-01-13
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Daisuke SUMOYAMA , Tomonori KANEMARU
CPC classification number: H01T13/39 , B22F3/16 , B22F2998/10 , C22C5/04 , C22C30/00 , C22C32/001 , C22C32/0031 , H01T13/20 , H01T13/32 , H01T21/02 , C22C1/1084 , B22F3/02 , B22F3/04 , B22F3/20 , B22F3/225 , B22F3/007 , B22F3/24
Abstract: An object of the present invention is to provide a spark plug which includes, at at least one of a center electrode and a ground electrode, a tip having excellent spark wear resistance in a high temperature environment, thereby having excellent durability. A spark plug includes a center electrode and a ground electrode disposed with a gap provided between the center electrode and the ground electrode. At least one of the center electrode and the ground electrode includes a tip which defines the gap. The tip includes a metal base material containing Ir as a main component, and oxide particles containing at least one of oxides having a perovskite structure represented by general formula ABO3 (A is at least one element selected from elements in group 2 in a periodic table, and B is at least one element selected from metal elements). When a cross section of the tip is observed, an area proportion of the oxide particles is not lower than 1% and not higher than 13%.
Abstract translation: 本发明的目的在于提供一种火花塞，其在中心电极和接地电极中的至少一个中包括在高温环境下具有优异的耐火花耐磨性的尖端，从而具有优异的耐久性。 火花塞包括中心电极和设置在中心电极和接地电极之间的间隙的接地电极。 中心电极和接地电极中的至少一个包括限定间隙的尖端。 尖端包括含有Ir作为主要成分的金属基材，以及包含至少一种具有由通式ABO 3表示的钙钛矿结构的氧化物的氧化物颗粒（A是选自元素周期表2中的元素中的至少一种元素， 和B是选自金属元素中的至少一种元素）。 当观察到尖端的横截面时，氧化物颗粒的面积比例不低于1％且不高于13％。
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公开(公告)号：US20140097739A1
公开(公告)日：2014-04-10
申请号：US14045998
申请日：2013-10-04
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Daisuke SUMOYAMA , Tomonori KANEMARU
IPC: H01T13/20
Abstract: In a spark plug, at least either of a center electrode and a ground electrode has a tip which defines a gap, a tip provided on at least either of a center electrode and a ground electrode contains Ir, Rh and Ru in a total amount of 95 mass % or more with respect to the whole mass amount thereof, and the contents (Rh, Ru) of Rh and Ru (mass %) lie within an area which is surrounded by a line which connects point A (6, 1), point B (6, 15), point C (33, 18), point D (33, 4) and the point A (6, 1) in this order or lie on the line. The tip satisfies 1.5≦Has/Han≦2.2.
Abstract translation: 在火花塞中，中心电极和接地电极中的至少一个具有限定间隙的尖端，设置在中心电极和接地电极中的至少一个上的尖端包含Ir，Rh和Ru的总量 相对于其整体质量为95质量％以上，Rh和Ru的含量（Rh，Ru）（质量％）位于被连接点A（6,1）， 点B（6,15），点C（33,18），点D（33,4）和点A（6,1）。 尖端满足1.5＆nlE; Has / Han＆nlE; 2.2。
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公开(公告)号：US20210036493A1
公开(公告)日：2021-02-04
申请号：US16966093
申请日：2019-09-03
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Daisuke SUMOYAMA , Kazuki ITO
Abstract: A spark plug capable of avoiding a discharge member bonded to a base material from peeling off easily is provided. The spark plug includes: a first electrode including a base material and a discharge member having at least a portion thereof bonded to the base material with a diffusing layer interposed therebetween; and a second electrode facing the discharge member with a spark gap interposed therebetween. The base material contains 50 mass % or more of Ni, 8 mass % or more and 40 mass % or less of Cr, 0.05 mass % or more and 2 mass % or less of Si, 0.01 mass % or more and 2 mass % or less of Al, 0.01 mass % or more and 2 mass % or less of Mn, 0.01 mass % or more and 0.1 mass % or less of C, and 0.001 mass % or more and 0.04 mass % or less of Fe.
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公开(公告)号：US20170063048A1
公开(公告)日：2017-03-02
申请号：US15245583
申请日：2016-08-24
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Tatsuya GOZAWA , Daisuke SUMOYAMA , Tsutomu SHIBATA
Abstract: A spark plug comprising a center electrode, a ground electrode disposed on the center electrode across a gap, and a tip joined to an opposed surface of the ground electrode that is opposed to the center electrode, the tip has a discharge layer and a relieving layer, the relieving layer is formed from a Pt—Ni alloy and joined to the opposed surface via a diffusion layer, the discharge layer is formed from a Pt—Rh alloy and joined via a clad diffusion layer to a side of the relieving layer opposite to a side of the relieving layer at which the ground electrode is joined, and 0.81≦A/B≦1.21 is satisfied when an average cross-sectional area of the discharge layer is A mm2 and an average cross-sectional area of the relieving layer is B mm2, and a method for producing the spark plug.
Abstract translation: 一种火花塞，包括中心电极，设置在中心电极上的间隙的接地电极以及与所述接地电极的与所述中心电极相对的相对表面接合的尖端，所述尖端具有放电层和释放层 缓冲层由Pt-Ni合金形成，并通过扩散层与相对表面接合，放电层由Pt-Rh合金形成，并通过包层扩散层与缓冲层的相反侧相接合 在放电层的平均截面积为Amm2且缓和层的平均截面积为（平均）截面积为...的情况下，满足接地电极的缓和层的一侧为0.81≤A/B≤1.21 Bmm2，以及火花塞的制造方法。
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Patent Agency Ranking
公开(公告)号：US20160276811A1
公开(公告)日：2016-09-22
申请号：US15030718
申请日：2014-09-02
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Tomonori KANEMARU , Daisuke SUMOYAMA , Osamu YOSHIMOTO
Abstract: A spark plug having a tip provided on at least one of a center electrode and a ground electrode. The spark plug includes a center electrode and a ground electrode disposed providing a gap with the center electrode. At least one of the center electrode and the ground electrode includes a tip forming the gap. The tip has a main constituent of Ir. The tip contains Rh of 7 mass % or more to 31 mass % or less, Ru of 5 mass % or more to 20 mass % or less, and Pt of one-twentieth or more to one-half or less of a Ru content.
Abstract translation: 一种火花塞，其具有设置在中心电极和接地电极中的至少一个上的尖端。 火花塞包括中心电极和设置成与中心电极间隙的接地电极。 中心电极和接地电极中的至少一个包括形成间隙的尖端。 尖端具有Ir的主要成分。 尖端包含7质量％以上至31质量％以下的Rh，5质量％以上至20质量％以下的Ru，Ru含量的二十分之一以上至二分之一以下的Pt。
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公开(公告)号：US20210036492A1
公开(公告)日：2021-02-04
申请号：US16965752
申请日：2019-09-03
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Daisuke SUMOYAMA , Kazuki ITO
Abstract: In a spark plug, a base material contains 50 mass % or more of Ni, 8 mass % or more and 40 mass % or less of Cr, 0.01 mass % or more and 2 mass % or less of Si, 0.01 mass % or more and 2 mass % or less of Al, 0.01 mass % or more and 2 mass % or less of Mn, 0.01 mass % or more and 0.1 mass % or less of C, and 0.001 mass % or more and 5 mass % or less of Fe. A discharge member contains at least Pt of a P group (Pt, Rh, Ir, and Ru) and Ni. The atomic concentration K of the P group of the discharge member, the atomic concentration L of the P group of the base material, the atomic concentration M of Ni of the discharge member, and the atomic concentration N of Ni of the base material satisfy (K+L)/(M+N)≤1.14.
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公开(公告)号：US20170033539A1
公开(公告)日：2017-02-02
申请号：US15102310
申请日：2014-12-16
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Masayuki SEGAWA , Daisuke SUMOYAMA
IPC: H01T13/39
Abstract: A spark plug wherein least one of a center electrode and ground electrode includes a shaft portion and an electrode tip joined to one surface of the shaft portion. The shaft portion includes a first core formed of a material containing copper and a first outer layer that is formed of a material having higher corrosion resistance than the first core and covers at least part of the first core. The electrode tip includes a second outer layer that is formed of a material containing a noble metal and forms the outer surface of the electrode tip and a second core that is formed of a material having a higher thermal conductivity than the second outer layer and is at least partially covered with the second outer layer.
Abstract translation: 一种火花塞，其中中心电极和接地电极中的至少一个包括轴部和连接到所述轴部的一个表面的电极末端。 轴部包括由包含铜的材料形成的第一芯和由具有比第一芯更高的耐腐蚀性的材料形成的第一外层，并且覆盖第一芯的至少一部分。 电极末端包括第二外层，其由含有贵金属的材料形成并形成电极末端的外表面，第二外层由第二外层由与第二外层相比具有较高热导率的材料形成，并且位于 最少部分地被第二外层覆盖。
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公开(公告)号：US20160294164A1
公开(公告)日：2016-10-06
申请号：US15036572
申请日：2014-09-10
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Daisuke SUMOYAMA , Tsutomu SHIBATA
IPC: H01T13/39
CPC classification number: H01T13/39 , B32B15/01 , B32B15/018 , C22C5/04 , C22C19/03 , C22C19/05 , C22C19/058
Abstract: A spark plug that includes a center electrode and a ground electrode. The center electrode is disposed providing a gap with the center electrode. At least one of the center electrode and the ground electrode includes a tip forming the gap. The tip includes a main body portion and a front surface layer. A composition of the main body portion is Pt as a main constituent and Rh of 5 mass % or more and Ni of 0 mass % or more to less than 8 mass %. The front surface layer is disposed at least at a surface radially outside of an axial line extending in a direction from a center of the main body portion to the gap. The front surface layer contains Ni of 8 mass % or more and has a thickness of 2 μm or more.
Abstract translation: 一种包括中心电极和接地电极的火花塞。 中心电极设置成与中心电极间隙。 中心电极和接地电极中的至少一个包括形成间隙的尖端。 尖端包括主体部分和前表面层。 主体部分的组成为Pt为主要成分，Rh为5质量％以上，Ni为0质量％以上且小于8质量％。 前表面层至少设置在从主体部的中心向间隙延伸的轴线的径向外侧的表面。 前表面层含有8质量％以上的Ni，其厚度为2μm以上。
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公开(公告)号：US20190296526A1
公开(公告)日：2019-09-26
申请号：US16353294
申请日：2019-03-14
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takaaki KIKAI , Daisuke SUMOYAMA , Takuto NAKADA
Abstract: A spark plug comprising: a first electrode including a tip containing Ir as a main material, and a base member to which the tip is joined; and a second electrode opposed to the tip with a spark gap therebetween. The number of crystal grains appearing in a range of 0.25 mm2 on an arbitrary cross-section of the tip in a first direction connecting the tip and the second electrode within the spark gap, is not less than 20. When a length of each of the crystal grains in the first direction is denoted by Y, and a length of each of the crystal grains in a second direction perpendicular to the first direction is denoted by X, 5 μm≤X≤100 μm and Y/X≥1.5 are satisfied.
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