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公开(公告)号：US20170093133A1
公开(公告)日：2017-03-30
申请号：US15272561
申请日：2016-09-22
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Haruki YOSHIDA , Jumpei ISASA , Toshitaka HONDA , Yutaka YOKOYAMA , Kuniharu TANAKA , Nobuyoshi ARAKI , Toshiki KON
Abstract: A spark plug includes an insulator, a center electrode, a metallic shell, and a ground electrode. The insulator contains not less than 90.0 mass % and not greater than 98.1 mass % of Al2O3 with respect to a total mass of elements, as reduced to oxides, contained in the insulator, and has a porosity not greater than 5%. Assuming that a porosity of the insulator after a heat treatment is B, a difference (B−A) of the porosities before and after the heat treatment is not greater than 3.5%. In the heat treatment, the insulator is placed in a furnace, and a temperature in the furnace is increased from a room temperature to 1400° C. at a temperature increase rate of 7° C./min and is held at 1400° C. for 30 minutes, and thereafter, the temperature is decreased from 1400° C. to 400° C. at a temperature decrease rate of 10° C. or less per 5 minutes and is decreased to the room temperature.
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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：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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公开(公告)号：US20160204580A1
公开(公告)日：2016-07-14
申请号：US14912753
申请日：2014-08-08
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Haruki YOSHIDA , Takamitsu MIZUNO , Masaaki KUMAGAI , Jumpei KITA , Yoshitomo IWASAKI , Toshitaka HONDA
Abstract: A spark plug includes an insulator having an axial hole, a center electrode inserted into a forward portion of the axial hole, a terminal electrode inserted into a rear portion of the axial hole, and an interelectrode insert which contains glass and electrically conductive carbon and is disposed in the axial hole between the center electrode and the terminal electrode. The interelectrode insert has a resistance of 1.0 kΩ to 3.0 kΩ, and the interelectrode insert has a carbon content of 1.5% by mass to 4.0% by mass at a forward portion located forward of a center point between the rear end of the center electrode and the forward end of the terminal electrode. Furthermore, the forward portion is lower in resistance than a rear portion of the interelectrode insert located rearward of the center point.
Abstract translation: 火花塞包括具有轴向孔的绝缘体，插入到轴向孔的前部的中心电极，插入到轴向孔的后部的端子电极和包含玻璃和导电性碳的电极间插入件 设置在中心电极和端子电极之间的轴向孔中。 电极间插入物的电阻为1.0 k＆OHgr; 至3.0kΩ，并且电极间插入物在位于中心电极的后端和端子电极的前端之间的中心点的前部的碳含量为1.5质量％至4.0质量％。 此外，前部的电阻低于位于中心点后方的电极间插入件的后部。
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公开(公告)号：US20160204579A1
公开(公告)日：2016-07-14
申请号：US14913772
申请日：2014-06-02
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Haruki YOSHIDA , Jumpei KITA , Yoshitomo IWASAKI , Toshitaka HONDA
Abstract: A resistor element of a spark plug containing ZrO2, wherein a target region is defined by a rectangular region where the size in the direction perpendicular to an axial line is 1800 μm and the size in the direction of the axial line is 2400 μm. In the case where the target region is divided into a plurality of square regions having lengths of 200 μm on a side, a transverse line-shaped region is defined by a region in a line shape that is constituted of nine square regions arranged in the direction perpendicular to the axial line. A first type region is defined by the square region where a proportion of an area of ZrO2 is 25% or more, and a second type region is defined by the square region where a proportion of an area of ZrO2 is less than 25%.
Abstract translation: 包含ZrO 2的火花塞的电阻元件，其中，目标区域由与轴线垂直的方向的尺寸为1800μm，轴线方向的尺寸为2400μm的矩形区域限定。 在目标区域被分成多个长度为200μm的方形区域的情况下，横向线状区域由线状形状的区域限定，该区域由方向上排列的9个正方形区域 垂直于轴线。 第一类型区域由ZrO 2面积的比例为25％以上的正方形区域限定，第二类型区域由ZrO 2的面积比例小于25％的正方形区域构成。
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Patent Agency Ranking
公开(公告)号：US20170250523A1
公开(公告)日：2017-08-31
申请号：US15521740
申请日：2015-09-23
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Hironori UEGAKI , Hirokazu KURONO , Toshitaka HONDA , Hiroyuki HAZAMA
Abstract: A method for manufacturing an insulator for a spark plug includes a molding process of forming a cylindrical molded product having an axial hole that extends in a direction of an axial line, by means of injection molding using a mold that has a columnar cavity therein and a bar-shaped member disposed in the cavity and extending in the direction of the axial line. In this method, the molding process includes an injection step of injecting a material containing a ceramic. In the injection step, the material is injected into the cavity from a plurality of injection openings that are opened at an inner circumferential surface, of the mold, that forms the cavity. The plurality of injection openings include two or more injection openings located at different positions in the direction of the axial line, or two or more injection openings located at different positions in a circumferential direction.
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公开(公告)号：US20170214219A1
公开(公告)日：2017-07-27
申请号：US15315581
申请日：2015-06-02
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Katsuya TAKAOKA , Kazuhiro KUROSAWA , Kuniharu TANAKA , Hisashi KOZUKA , Toshitaka HONDA , Hirokazu KURONO , Haruki YOSHIDA , Hironori UEGAKI
Abstract: Disclosed is a spark plug capable of suppressing high-frequency noise by improving the material of an electrical connection part between a center electrode and a metal terminal within an axial hole of an insulator. A spark plug has an electrical connection part arranged in an axial hole of an insulator to establish electrical connection between a center electrode and a metal terminal. The electrical connection part includes a conductor having a first crystal phase formed of a Fe-containing oxide and a second crystal phase formed of a conductive metal oxide of perovskite crystal structure.
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公开(公告)号：US20150325982A1
公开(公告)日：2015-11-12
申请号：US14707344
申请日：2015-05-08
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 having an insulator with a through hole formed therein in a direction of an axis, a center electrode disposed in a front side of the through hole, a metal terminal disposed in a rear side of the through hole, an electrical connection part arranged in the through hole to establish electrical connection between the center electrode and the metal terminal and a metal shell holding therein the insulator. The electrical connection part has a conductor including a conductive material and at least one kind of Fe-containing oxide material. The Fe-containing oxide material contains at least FeO. The conductor satisfies a relationship of 0.06≦S1/(S1+S2)≦0.46 where, in a cross section taken along the axis, S1 is an area occupied by the conductive material and S2 is an area occupied by the Fe-containing oxide material.
Abstract translation: 一种火花塞，具有绝缘体，其沿着轴方向形成有贯通孔，设置在所述通孔的前侧的中心电极，设置在所述通孔的后侧的金属端子，布置在所述通孔的后侧的电连接部 在通孔中建立中心电极和金属端子之间的电连接以及保持绝缘体的金属壳。 电连接部分具有包括导电材料和至少一种含Fe氧化物材料的导体。 含Fe氧化物材料至少含有FeO。 导体满足0.06＆nlE; S1 /（S1 + S2）＆nlE; 0.46的关系，其中在沿着轴线截取的横截面中，S1是由导电材料占据的面积，S2是由含Fe 氧化物。
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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：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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