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公开(公告)号：US20150349498A1
公开(公告)日：2015-12-03
申请号：US14723506
申请日：2015-05-28
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Katsuya TAKAOKA , Kazuhiro KUROSAWA , Kuniharu TANAKA , Haruki YOSHIDA , Hirokazu KURONO , Toshitaka HONDA
IPC: H01T13/04
Abstract: A spark plug including an insulator having an axial hole, a center electrode held at one end side and a terminal electrode held at the other end side of the axial hole, an electrical connection portion electrically connecting the center electrode and the terminal electrode inside the axial hole, wherein the electrical connection portion includes a conductor including a ceramic phase and a metal wire having a spiral structure portion, wherein the metal wire has a wire diameter of 0.1 mm or greater and 0.5 mm or smaller, and wherein the spiral structure portion of the metal wire is configured such that an outer diameter thereof is 1.0 mm or greater and 3 mm or smaller, a pitch thereof is 0.3 mm or greater and 1 mm or smaller, and a height thereof is 8 mm or greater and 30 mm or smaller.
Abstract translation: 一种火花塞，其包括具有轴孔的绝缘体，一端保持的中心电极和保持在所述轴孔的另一端侧的端子电极，在所述轴向孔内电连接所述中心电极和所述端子电极的电连接部 其特征在于，所述电连接部包括具有陶瓷相的导体和具有螺旋结构部的金属线，所述金属线的线径为0.1mm以上且0.5mm以下，其特征在于， 金属线的外径为1.0mm以上且3mm以下，间距为0.3mm以上且1mm以下，高度为8mm以上且30mm以下 。
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公开(公告)号：US20190131776A1
公开(公告)日：2019-05-02
申请号：US16095788
申请日：2017-05-25
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Jumpei ISASA , Seiji NAKANO , Hirokazu KURONO , Kuniharu TANAKA , Yutaka YOKOYAMA , Haruki YOSHIDA , Shun KONDO
Abstract: Provided is a spark plug capable of ensuring fouling resistance with a simple configuration. An insulator includes a step portion formed on an outer circumferential surface thereof. A center electrode is arranged in an axial hole of the insulator. A cylindrical metal shell having a shelf portion formed on an inner circumferential surface thereof is arranged radially outside the insulator. The insulator further includes a front end portion located frontward of the step portion. An outer circumferential surface of the front end portion has an arithmetic average roughness of 0.5 μm or smaller in a circumferential direction. A recess is formed with a depth of 3 to 20 μm in at least part of an end surface and the outer circumferential surface of the front end portion so as to extend from the front toward the rear.
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公开(公告)号：US20190067914A1
公开(公告)日：2019-02-28
申请号：US16106103
申请日：2018-08-21
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kazuhiro KUROSAWA , Katsuya TAKAOKA , Kota YOKOYAMA , Kuniharu TANAKA , Hirokazu KURONO , Hironori UEGAKI
IPC: H01T13/05
Abstract: A spark plug having a connection portion disposed between a metal terminal and a center electrode. The connection portion includes: a magnetic substance formed from a Fe-containing oxide; a conductor which is a wire helically disposed on an outer periphery of the magnetic substance and electrically connected to the metal terminal and the center electrode; and an intermediate member which is in contact with the magnetic substance, the conductor, and an inner peripheral surface of the insulator, is disposed between the magnetic substance and the conductor, and the inner peripheral surface of the insulator, and has lower electrical conductivity than the conductor. The conductor is made of one or more of an oxide conductor, carbon, and a carbon compound.
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公开(公告)号：US20180048126A1
公开(公告)日：2018-02-15
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
CPC classification number: H01T13/38 , C04B35/10 , C04B35/111 , C04B35/62655 , C04B35/63416 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3222 , C04B2235/3418 , C04B2235/3481 , C04B2235/5436 , C04B2235/5445 , C04B2235/6565 , C04B2235/6567 , C04B2235/85 , H01B3/12
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.
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公开(公告)号：US20160322789A1
公开(公告)日：2016-11-03
申请号：US15108075
申请日：2014-12-25
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Katsuya TAKAOKA , Kazuhiro KUROSAWA , Kuniharu TANAKA , Toshitaka HONDA , Hirokazu KURONO , Haruki YOSHIDA , Hironori UEGAKI
Abstract: A connection portion connecting a center electrode and a terminal metal fixture together in a through hole of the insulator includes a resistor and a magnetic substance structure including a magnetic substance and a conductor The connection portion further includes a first conductive sealing portion, a second conductive sealing portion and a third conductive sealing portion. The first conductive sealing portion is disposed on a leading end side of a first member and is in contact therewith. The second conductive sealing portion is disposed between the first member and a second member and is in contact with the first member and the second member. The third conductive sealing portion is disposed on a rear end side of the second member and is in contact therewith.
Abstract translation: 在绝缘子的通孔中连接中心电极和端子金属固定器的连接部分包括电阻器和包括磁性物质和导体的磁性物质结构。连接部分还包括第一导电密封部分，第二导电密封部分 部分和第三导电密封部分。 第一导电密封部分设置在第一构件的前端侧并与其接触。 第二导电密封部分设置在第一构件和第二构件之间并与第一构件和第二构件接触。 第三导电密封部分设置在第二构件的后端侧并与其接触。
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Patent Agency Ranking
公开(公告)号：US20190067915A1
公开(公告)日：2019-02-28
申请号：US16106187
申请日：2018-08-21
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kazuhiro KUROSAWA , Katsuya TAKAOKA , Kota YOKOYAMA , Kuniharu TANAKA , Hirokazu KURONO , Hironori UEGAKI
Abstract: A spark plug having a connection portion disposed in the axial hole and between a metal terminal and a center electrode. The connection portion includes: a magnetic substance formed from a Fe-containing oxide; a conductor helically disposed on an outer periphery of the magnetic substance and electrically connected to the metal terminal and the center electrode; and an intermediate member disposed between the magnetic substance and the conductor, and an inner peripheral surface of the insulator and having lower electrical conductivity than the conductor. The conductor includes a base and a conductive layer disposed on an outer periphery of the base and having higher electrical conductivity than the base, and the conductive layer has a thickness of larger than 0.1 μm and equal to or smaller than 25 μm.
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公开(公告)号：US20180166861A1
公开(公告)日：2018-06-14
申请号：US15580903
申请日：2016-05-25
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kazuhiro KUROSAWA , Katsuya TAKAOKA , Kuniharu TANAKA , Toshitaka HONDA , Hirokazu KURONO , Hironori UEGAKI
CPC classification number: H01T13/05 , C01G49/0063 , C01G49/02 , C01G51/04 , C01G53/006 , C01G53/04 , C01P2004/61 , C01P2004/62 , C01P2006/42 , H01T13/20 , H01T13/41
Abstract: A connection structure between a center electrode and a metal terminal of a spark plug having a composite part that contains a plurality of secondary particles each formed of a plurality of primary particles of iron-containing oxide as a magnetic substance, and a conductive material coating the plurality of secondary particles. The iron-containing oxide includes at least one of an oxide represented by M1+AOFe2−AO3 (where −0.5≤A≤0.5; and M is at least one kind of element selected from the group consisting of Mn, Fe, Co, Ni, Cu, Mg, Zn and Ca) and an oxide represented by Q3Fe5O12 (where Q is at least one kind of element selected from the group consisting of Y, Lu, Yb, Tm, Er, Ho, Dy, Tb, Gd and Sm). In cross section, an average particle size of the primary particles is 0.5 μm to 100 μm, an average particle size of the secondary particles is 0.5 mm to 2.0 mm, and a porosity of the inside of the secondary particles is 5% or lower.
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公开(公告)号：US20170353013A1
公开(公告)日：2017-12-07
申请号：US15607714
申请日：2017-05-30
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Haruki YOSHIDA , Kuniharu TANAKA , Yutaka YOKOYAMA , Shun KONDO , Hirokazu KURONO , Toshimasa SAJI
Abstract: A spark plug having an insulator with a leg portion whose outer circumferential surface has an arithmetic mean roughness Ra of 0.5 μm or less. The leg portion has a first section, a second section, and a third section. The first section has an outer diameter that decreases toward the forward end of the first section. The second section is located forward of and adjacent to the first section and its outer diameter decreases toward the forward end of the second section. The outer circumferential surface of the second section is located inward of a first straight line passing through the base and forward ends of the outer circumferential surface of the first section. The third section is located forward of and adjacent to the second section. The outer diameter of the third section is equal to or less than a forward end outer diameter Ds of the second section over the entire third section.
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公开(公告)号：US20140336035A1
公开(公告)日：2014-11-13
申请号：US14273026
申请日：2014-05-08
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Katsuya TAKAOKA , Yutaka YOKOYAMA , Kengo FUJIMURA , Hironori UEGAKI , Hiroki TAKEUCHI , Hirokazu KURONO , Toshitaka HONDA , Kuniharu TANAKA , Takeshi MITSUOKA
IPC: H01T13/38 , C04B35/50 , C04B35/505
CPC classification number: H01T13/38 , C04B35/111 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3241 , C04B2235/3244 , C04B2235/3251 , C04B2235/3262 , C04B2235/3272 , C04B2235/3418 , C04B2235/786 , C04B2235/85
Abstract: An insulator for spark plug with a main constituent of alumina and containing silicon includes a grain boundary phase positioned between alumina particles. The grain boundary phase contains: a group 2A element; a rare earth element; and at least one kind of zirconium, titanium, chrome, niobium, manganese, and iron (a first element). Assuming that a total amount of the rare earth element is X (mass %), a total amount of the group 2A element is Y (mass %), and a total amount of the first element is Z (mass %), the following are met: 0.40≦Y/X≦2.00 0.10≦Z/X≦0.40.
Abstract translation: 具有主要成分为氧化铝和含硅的火花塞的绝缘体包括位于氧化铝颗粒之间的晶界相。 晶界相包含：2A族元素; 稀土元素; 和至少一种锆，钛，铬，铌，锰和铁（第一元素）。 假设稀土元素的总量为X（质量％），则2A族元素的总量为Y（质量％），第一元素的总量为Z（质量％），以下为 满足：0.40＆nlE; Y / X＆nlE; 2.00 0.10＆nlE; Z / X＆lt;
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公开(公告)号：US20140091707A1
公开(公告)日：2014-04-03
申请号：US14042836
申请日：2013-10-01
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Toshimasa SAJI , Hirokazu KURONO , Toshitaka HONDA
IPC: H01T13/41
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。
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