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公开(公告)号：US10804682B2
公开(公告)日：2020-10-13
申请号：US16742977
申请日：2020-01-15
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takashi Sekizawa , Tomokatsu Kashima , Yasushi Sakakura
Abstract: A spark plug including a ground electrode including a base material, a tip having a discharge surface, and a melt portion interposed over an entire area between the tip and the base material and joining the tip to the base material; and a center electrode with a spark gap formed between the center electrode and the discharge surface. The tip has, in an inner area surrounded by an outer peripheral portion of the tip, a thin portion in which a distance between the discharge surface and the melt portion is shorter than a distance between the discharge surface and the melt portion in the outer peripheral portion. The thin portion extends from a part of the outer peripheral portion to a part other than the part of the outer peripheral portion.
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公开(公告)号：US12009639B2
公开(公告)日：2024-06-11
申请号：US17437679
申请日：2020-11-17
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takashi Sekizawa , Tomokatsu Kashima , Yuya Ono , Yuki Toumatsu , Yudai Kawaguchi , Kazuyoshi Torii
Abstract: A spark plug that can reduce variation in a discharge point. The spark plug includes: a center electrode; a metal shell insulating and holding the center electrode; and a ground electrode including a base material having one end portion connected to the metal shell, and a tip connected to another end portion of the base material. The tip has a discharge surface opposed to the center electrode with a spark gap therebetween. The discharge surface has a quadrangular shape and is chamfered at four sides thereof. Only a first side which is one of the four sides is provided with a C chamfer.
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公开(公告)号：US20150222096A1
公开(公告)日：2015-08-06
申请号：US14419313
申请日：2013-08-09
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Katsutoshi Nakayama , Tomokatsu Kashima , Tatsunori Yamada
Abstract: A spark plug having a metal shell, center electrode and a ground electrode. The ground electrode includes an electrode base portion extending from a front end portion of the metal shell toward the front, a bent portion connected at one end thereof to a front end of the electrode base portion and an electrode distal end portion extending from the other end of the bent portion and forming a spark discharge gap with a center electrode. The ground electrode has a base material and a coating layer applied to the base material. The coating layer is formed on at least a front end face and an outer circumferential surface other than a center-electrode-side surface of the electrode distal end portion of the ground electrode. The base material of the ground electrode is exposed at least at a part of the electrode base portion.
Abstract translation: 具有金属壳，中心电极和接地电极的火花塞。 接地电极包括从金属壳的前端部朝向前方延伸的电极基部，在其一端连接到电极基部的前端的弯曲部分和从另一端延伸的电极远端部 并与中心电极形成火花放电间隙。 接地电极具有基材和涂覆在基材上的涂层。 在除了接地电极的电极前端部的中心电极侧面以外的至少前端面和外周面上形成有涂层。 至少在电极基部的一部分露出接地电极的基材。
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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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Patent Agency Ranking
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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公开(公告)号：US09306374B2
公开(公告)日：2016-04-05
申请号：US14419313
申请日：2013-08-09
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Katsutoshi Nakayama , Tomokatsu Kashima , Tatsunori Yamada
Abstract: A spark plug having a metal shell, center electrode and a ground electrode. The ground electrode includes an electrode base portion extending from a front end portion of the metal shell toward the front, a bent portion connected at one end thereof to a front end of the electrode base portion and an electrode distal end portion extending from the other end of the bent portion and forming a spark discharge gap with a center electrode. The ground electrode has a base material and a coating layer applied to the base material. The coating layer is formed on at least a front end face and an outer circumferential surface other than a center-electrode-side surface of the electrode distal end portion of the ground electrode. The base material of the ground electrode is exposed at least at a part of the electrode base portion.
Abstract translation: 具有金属壳，中心电极和接地电极的火花塞。 接地电极包括从金属壳的前端部朝向前方延伸的电极基部，在其一端连接到电极基部的前端的弯曲部分和从另一端延伸的电极远端部 并与中心电极形成火花放电间隙。 接地电极具有基材和涂覆在基材上的涂层。 在除了接地电极的电极前端部的中心电极侧面以外的至少前端面和外周面上形成有涂层。 至少在电极基部的一部分露出接地电极的基材。
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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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