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公开(公告)号：US20140210336A1
公开(公告)日：2014-07-31
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：US11515690B2
公开(公告)日：2022-11-29
申请号：US17292898
申请日：2020-04-27
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kenji Ban , Tatsuya Gozawa
Abstract: A spark plug capable of generating a sufficient volume of jet with an increased range is provided. The spark plug includes a metal shell having a tubular shape; a center electrode retained in the metal shell in an insulated manner; a ground electrode that is electrically connected to the metal shell and that defines a spark gap between the center electrode and an end portion of the ground electrode; and a cap portion 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. The cap portion includes a plurality of projections on an inner surface of the through hole. The projections extend in an extending direction in which the through hole extends.
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公开(公告)号：US10971901B2
公开(公告)日：2021-04-06
申请号：US16911723
申请日：2020-06-25
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kenji Ban
Abstract: A spark plug that improves the heat resistance performance of an ignition plug.
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公开(公告)号：US10811851B1
公开(公告)日：2020-10-20
申请号：US16877897
申请日：2020-05-19
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Tatsuya Gozawa , Kenji Ban
Abstract: A spark plug includes: a center electrode; a ground electrode that is provided such that a gap for spark discharge is formed between the center electrode and the ground electrode; and a plug cover covering the center electrode and the ground electrode from a front side. The plug cover has a through hole, wherein the plug cover includes a diameter reduction portion formed in a range of 0.1 mm or less from an outer open end of the through hole in a direction along a central axis of the through hole and having a diameter gradually decreasing from the outer open end toward an inner open end of the through hole. A relationship of 0 mm
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公开(公告)号：US10777976B1
公开(公告)日：2020-09-15
申请号：US16848289
申请日：2020-04-14
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Tatsuya Gozawa , Kenji Ban , Daiki Goto
Abstract: A spark plug wherein the occurrence of pre-ignition and misfires is suppressed. The spark plug includes a cover portion that covers a front end portion of a center electrode and a facing portion of a ground electrode from a front end side of the spark plug to form a pre-chamber space. The cover portion has injection holes that are through-holes. A total area A (mm2) of inner peripheral surfaces of the injection holes and a thermal conductivity B (W/mK) of a material of the cover portion satisfy a formula (1): 10
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Patent Agency Ranking
公开(公告)号：US10714908B1
公开(公告)日：2020-07-14
申请号：US16843977
申请日：2020-04-09
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Tatsuya Gozawa , Kenji Ban
Abstract: A spark plug includes a center electrode; a metal shell that retains the center electrode at an outer periphery of the center electrode in an insulating 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 connected to the metal shell, the plug cap covering the center electrode and the end portion of the ground electrode from front and having a through hole in a region in front of the ground electrode. An inner surface of the plug cap has at least one ridge in a first region that is in front of an inner open end of the through hole.
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公开(公告)号：US09780535B2
公开(公告)日：2017-10-03
申请号：US15298287
申请日：2016-10-20
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kenji Ban , Kohei Usami
Abstract: A spark plug having a ground electrode, a noble metal tip having a front end that projects forward of a front end portion of the ground electrode, and a center electrode. When S1 represents an area of an overlap region in which a region onto which the center electrode is projected overlaps a region onto which the noble metal tip is projected when the center electrode and the noble metal tip are projected onto an imaginary plane perpendicular to a center line of the center electrode, and S2 represents an area of an overlap region in which a region onto which the noble metal tip is projected overlaps a region onto which the ground electrode is projected when the noble metal tip and the ground electrode are projected onto the imaginary plane, 0.22≦S1/S2≦0.68 is satisfied.
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28.发明授权公开(公告)号：US09775227B2
公开(公告)日：2017-09-26
申请号：US14948910
申请日：2015-11-23
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kenji Ban , Hiroyuki Kameda , Kohei Usami
Abstract: A non-thermal equilibrium plasma ignition plug including a tubular metallic shell having an axial hole extending along an axial line, an insulator disposed in such a manner as to form a gap in cooperation with a wall surface of the axial hole at a forward end portion of the metallic shell, and a center electrode held at the center of the insulator, and generates nonequilibrium plasma in response to voltage applied thereto from a power supply. The insulator has a plurality of depressions or protrusions formed on a surface thereof which faces a discharge space therearound.
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公开(公告)号：US08928212B2
公开(公告)日：2015-01-06
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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公开(公告)号：US20140226251A1
公开(公告)日：2014-08-14
申请号：US14173867
申请日：2014-02-06
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Tatsunori Yamada , Kenji Ban , Tomokatsu Kashima
IPC: H01T13/32
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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