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公开(公告)号：US08912715B2
公开(公告)日：2014-12-16
申请号：US14349476
申请日：2012-12-06
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Kenji Ban
Abstract: A spark plug having a center electrode, a ground electrode, and a ground electrode side tip. The tip partially projects from a front end face and an inner circumference-side side surface of the ground electrode. The ground electrode has a center of the front end face, which center is located at a front end side in a direction of the axis with respect to a front end of the center electrode.
Abstract translation: 具有中心电极，接地电极和接地电极侧端的火花塞。 尖端从接地电极的前端面和内周侧面侧部分地突出。 接地电极具有前端面的中心，该中心位于相对于中心电极的前端的轴线方向的前端侧。
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公开(公告)号：US08853930B2
公开(公告)日：2014-10-07
申请号：US14154215
申请日：2014-01-14
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Tatsunori Yamada , Naofumi Yamamura , Kenji Ban
Abstract: An ignition plug that reliably restrains generation of corona discharge for enhancing accuracy in detection of ionic current and method of manufacturing same. The ignition plug is configured such that a metallic shell and an insulator are fixed together by means of a crimped portion provided at a rear end portion of the metallic shell and bent radially inward. An electrically insulative filling member fills a space formed between the crimped portion and the insulator. The filling member covers at least a portion of an outer circumferential surface of a rear trunk portion of the insulator along the entire circumference and the entirety of a rear end surface of the metallic shell, which is a portion of the outer surface of the crimped portion and is visible from the rear side with respect to the direction of an axial line CL1.
Abstract translation: 一种可靠地抑制电晕放电产生以提高离子电流检测精度的火花塞及其制造方法。 火花塞被构造成使得金属壳和绝缘体通过设置在金属壳的后端部并径向向内弯曲的卷曲部分固定在一起。 电绝缘填充构件填充形成在压接部分和绝缘体之间的空间。 填充构件覆盖绝缘子的后主体部分的外周面的至少一部分沿着整个圆周和金属壳的后端表面的整体，该后端表面是卷曲部分的外表面的一部分 并且从相对于轴线CL1的方向的后侧可见。
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公开(公告)号：US11431155B2
公开(公告)日：2022-08-30
申请号：US17283203
申请日：2020-06-23
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kenji Ban , Tatsuya Gozawa
IPC: H01T13/54
Abstract: A spark plug includes a metal shell and a cap member joined to the metal shell to define a pre-chamber. The cap member includes an overlapping surface that overlaps the metal shell along the axial line direction, an inner facing surface positioned closer to the pre-chamber than is the overlapping surface, the inner facing surface facing the metal shell in the axial line direction, and an outer facing surface positioned closer to an outer periphery than is the overlapping surface, the outer facing surface facing the metal shell in the axial line direction. A portion of the cap member that is closer to the pre-chamber than is the overlapping surface s spaced from the metal shell. The metal shell and the cap member are joined together at at least one of the outer facing surface and the overlapping surface.
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公开(公告)号：US10833486B1
公开(公告)日：2020-11-10
申请号：US16814126
申请日：2020-03-10
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Tatsuya Gozawa , Kenji Ban , Daiki Goto
Abstract: A spark plug having excellent ignitability including a rod-shaped center electrode; a ground electrode that includes a facing portion facing a front end portion of the center electrode and forms a discharge gap between the facing portion and the front end portion of the center electrode; an insulator; a metal shell; and a cover portion that covers, from a front end side of the spark plug, the front end portion of the center electrode and the facing portion of the ground electrode to form a pre-chamber and includes injection holes that are through holes.
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公开(公告)号：US10714906B1
公开(公告)日：2020-07-14
申请号：US16843200
申请日：2020-04-08
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Kenji Ban
Abstract: A spark plug capable of facilitating the growth of a flame kernel. The spark plug including a metal shell; a center electrode retained in the metal shell in an insulated manner; a ground electrode disposed such that a spark gap is formed between the center electrode and an end portion of the ground electrode; and a plug cap that covers the center electrode and the end portion of the ground electrode from the front in a region in front of the metal shell and in which a through hole is formed. An inner surface of the plug cap in a region in front of a back end of the end portion of the ground electrode and an inner surface of the through hole each have an arithmetical mean roughness of less than or equal to 6.3 μm.
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Patent Agency Ranking
公开(公告)号：US10107252B2
公开(公告)日：2018-10-23
申请号：US15168801
申请日：2016-05-31
Applicant: NGK Spark Plug Co., LTD.
Inventor： Kenji Ban , Kohei Usami
Abstract: In an ignition plug, the volume V1 of a portion of an insulator, which projects from a metallic shell to a front side, is equal to or greater than 45 mm3; and an expression 0.18≤V2/V1≤0.37 is satisfied, where H is a length along which the insulator projects from the metallic shell to the front side in an axial direction, and V2 is a volume of a portion of the insulator, which projects from a front end of the insulator along a length H/2 in the axial direction.
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公开(公告)号：US09929541B2
公开(公告)日：2018-03-27
申请号：US15658794
申请日：2017-07-25
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Hirotaka Saito , Kohei Usami , Kenji Ban
Abstract: An ignition plug capable of improving ignition performance while preventing pre-ignition includes a center electrode, a bottomed cylindrical insulator enclosing a front end portion of the center electrode and a cylindrical metal shell holding therein the insulator. The insulator has, on a front end side thereof, a protruding portion protruding from and located frontward of a front end of the metal shell. In the ignition plug, a difference between an outer diameter of the center electrode and an inner diameter of the insulator is 0.01 mm or more; an axial length of the protruding portion is 6.7 mm to 12.7 mm; and the following condition is satisfied: 1.07≤S/V1≤1.35 where S is an outer surface area of the protruding portion; and V1 is a volume of the protruding portion.
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公开(公告)号：US09246313B2
公开(公告)日：2016-01-26
申请号：US14087412
申请日：2013-11-22
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kenji Ban , Tatsunori Yamada , Tomokatsu Kashima , Katsutoshi Nakayama
CPC classification number: H01T15/00 , F02P3/01 , F02P3/04 , F02P23/04 , F02P23/045
Abstract: An ignition system includes an ignition plug, a discharge power supply for applying a high voltage to the gap of the ignition plug, a high-frequency power supply for supplying a high-frequency current to the gap, a matching unit provided between the ignition plug and the high-frequency power supply, and a mixer through which currents output from the two power supplies flow. An oscillation frequency fs (Hz) which maximizes the current flowing between the matching unit and the mixer when spark discharge is generated and an oscillation frequency fo (Hz) which maximizes the current flowing between the matching unit and the mixer when spark discharge is not generated satisfy a relation fs/fo≧0.85. Thus, a current whose oscillation frequency is equal to the oscillation frequency fs flows between the matching unit and the mixer when spark discharge is not generated.
Abstract translation: 点火系统包括火花塞，用于向火花塞的间隙施加高电压的放电电源，用于向间隙提供高频电流的高频电源;设置在火花塞之间的匹配单元 和高频电源以及从两个电源输出的电流流过的混频器。 当不产生火花放电时，使匹配单元和混合器之间流动的电流最大化的振荡频率fs（Hz），以及当不产生火花放电时使匹配单元和混合器之间的电流最大化的振荡频率fo（Hz） 满足关系fs /fo≥0.85。 因此，当不产生火花放电时，其振荡频率等于振荡频率fs的电流在匹配单元和混合器之间流动。
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公开(公告)号：US09124075B2
公开(公告)日：2015-09-01
申请号：US14173867
申请日：2014-02-06
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Tatsunori Yamada , Kenji Ban , Tomokatsu Kashima
CPC classification number: H01T13/32 , F02P3/0435 , H01T13/20
Abstract: An ignition system that sufficiently utilizes the energy output from a power supply, to thereby realize excellent ignition performance. The ignition system includes an ignition plug having a spark discharge gap formed between a center electrode and a ground electrode, and a power supply for supplying electric energy to the spark discharge gap. Electric energy output from the power supply for producing spark discharge of one unit is set to 100 mJ or greater. S1≧[{−30 (mm−1)×G1+60}/100]×S2 and G1
Abstract translation: 一种充分利用从电源输出的能量的点火系统，从而实现优异的点火性能。 点火系统包括具有形成在中心电极和接地电极之间的火花放电间隙的火花塞和用于向火花放电间隙提供电能的电源。 用于产生一个单元的火花放电的电源的电能输出设定为100mJ以上。 S1≥[{ - 30（mm-1）×G1 + 60} / 100]×S2和G1 <2.0，其中G1表示火花放电的尺寸（mm），S1表示由 通过从中心电极的投影区域移除突出区域与接地电极的突出区域重叠的区域，S2表示由中心电极的突出区域限定的面积（mm2）而获得的区域。
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公开(公告)号：US20140361676A1
公开(公告)日：2014-12-11
申请号：US14299026
申请日：2014-06-09
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kenji Ban , Tatsunori Yamada , Tomokatsu Kashima , Katsutoshi Nakayama
Abstract: A ground electrode includes a main body portion and a projecting portion having a width smaller than a width of the main body portion. A spark discharge gap is formed between a discharging surface of the projecting portion and a front end surface of a center electrode. When the front end surface and the ground electrode are projected on a first plane, at least a part of the projection region of the projecting portion overlaps the projection region of the front end surface. A width Le (mm), a width Lc (mm), a cross-sectional area Sg (mm2), a cross-sectional area Sc (mm2), an angle θ1(°), an angle θ2(°), an angle θ3(°), and an angle θ4(°) satisfy expressions Le
Abstract translation: 接地电极包括主体部分和具有小于主体部分的宽度的宽度的突出部分。 在突出部分的排出表面和中心电极的前端表面之间形成火花放电间隙。 当前端面和接地电极突出在第一平面上时，突出部分的突出区域的至少一部分与前端面的突出区域重叠。 宽度Le（mm），宽度Lc（mm），横截面积Sg（mm2），横截面积Sc（mm2），角度θ（1），角度θ ），角度和角度; 3（°）和角度角; 4（°）满足表达式Le
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