公开(公告)号：US08907552B2

公开(公告)日：2014-12-09

申请号：US14353699

申请日：2012-11-12

Applicant: NGK Spark Plug Co., Ltd.

Inventor： Kohei Katsuraya ,  Katsutoshi Nakayama

IPC: H01T13/20

CPC classification number: H01T13/20 ,  F02P3/01 ,  F02P13/00 ,  F02P23/04 ,  H01T13/16 ,  H01T13/50 ,  H05H1/52 ,  H05H2001/4682

Abstract: An ignition plug (1) includes a center electrode (5) extending in the direction of an axis (CL1), an insulator (2) having an axial hole (4) into which the center electrode (5) is inserted, a tip (31) joined to a forward end portion of the center electrode (5) by a fusion portion (35), and a ground electrode (27) forming a gap (33) in cooperation with the tip (31). The ignition plug generates high-frequency plasma at the gap (33) when high-frequency electric power is supplied to the gap (33). The forward end of the tip (31) is located forward of the forward end of the insulator (2) with respect to the direction of the axis (CL1). Also, at least a portion of the outer surface of the fusion portion (35) is located within the axial hole (4), and, the distance between a forward-end-side opening of the axial hole (4) and the rearmost end of the outer surface of the fusion portion (35), measured along the axis (CL1), is equal to or greater than 0.1 mm. Thus, in the ignition plug (1) which generates high-frequency plasma, corrosion of the fusion portion can be suppressed effectively, whereby durability is improved.

Abstract translation: 火花塞（1）包括沿着轴线（CL1）的方向延伸的中心电极（5），具有插入中心电极（5）的轴向孔（4）的绝缘体（2），尖端 31）通过熔接部（35）与中心电极（5）的前端部分接合，和与顶端（31）配合形成间隙（33）的接地电极（27）。 当向间隙（33）供给高频电力时，火花塞在间隙（33）产生高频等离子体。 尖端（31）的前端相对于轴线（CL1）的方向位于绝缘体（2）的前端的前方。 此外，熔融部（35）的外表面的至少一部分位于轴向孔（4）内，并且轴向孔（4）的前端侧开口与最后端 沿着轴线（CL1）测量的熔融部分（35）的外表面的厚度等于或大于0.1mm。 因此，在产生高频等离子体的火花塞（1）中，可以有效地抑制熔融部的腐蚀，提高耐久性。

公开(公告)号：US20140328001A1

公开(公告)日：2014-11-06

申请号：US14264102

申请日：2014-04-29

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kenji Ban ,  Katsutoshi Nakayama

IPC: H01T13/20

CPC classification number: H01T13/20

Abstract: An ignition plug that promotes expansion of flame and enhances spark corrosion resistance, said plug includes a center electrode; a tubular insulator holding the center electrode; a tubular metallic shell holding the insulator; and a ground electrode having a bent portion and a facing end surface. A plurality of peak voltages can be applied to the center electrode after application of a voltage for trigger discharge thereto. When a forward end surface of the center electrode and the facing end surface are projected onto a plane orthogonal to axial direction of the center electrode, the projection of the center of the forward end surface and the projection of the facing end surface overlap with each other, and the projection of a remote-side edge portion of the facing end surface which is located on the side remote from the bent portion is located within the projection of the forward end surface.

Abstract translation: 一种火花塞，其促进火焰膨胀并增强火花塞耐腐蚀性，所述塞子包括中心电极; 保持中心电极的管状绝缘体; 保持绝缘体的管状金属外壳; 以及具有弯曲部和面对端面的接地电极。 在施加用于触发放电的电压之后，可以向中心电极施加多个峰值电压。 当中心电极的前端表面和相对端面突出到与中心电极的轴向正交的平面上时，前端表面的中心和相对的端表面的突出部的突起彼此重叠 并且位于远离弯曲部分的一侧的相对端面的远侧边缘部分的突起位于前端表面的突起内。

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

IPC: H01T13/20 ,  H01T13/32 ,  H01T13/39

CPC classification number: H01T13/32 ,  H01T13/16 ,  H01T13/39

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。

公开(公告)号：US09263857B2

公开(公告)日：2016-02-16

申请号：US13782134

申请日：2013-03-01

Applicant: NGK Spark Plug Co., LTD.

Inventor： Katsutoshi Nakayama ,  Kohei Katsuraya

IPC: F02P3/05 ,  H01T13/40 ,  F02P1/00

CPC classification number: H01T13/40 ,  F02P1/00

Abstract: A superior ignitability is realized assuredly by specifying at least either of a relation in magnitude between absolute values of a plus-side voltage and a minus-side voltage and a relation in magnitude between absolute values of a plus-side current and a minus-side current when alternating current power is introduced. An ignition system includes a spark plug, a discharging power supply which applies a voltage to a spark gap of the spark plug to thereby generate an electric spark discharge and an alternating current power supply which introduces alternating current power to an electric spark generated by the electric spark discharge to generate an alternating current plasma.

Abstract translation: 通过确定正侧电压和负侧电压的绝对值与负侧电压的绝对值之间的关系以及正侧电流和负侧电流的绝对值之间的关系中的至少一个，可靠地实现优异的点火性 引入交流电时的电流。 点火系统包括火花塞，放电电源，其向火花塞的火花隙施加电压，从而产生电火花放电;以及交流电源，其将交流电力引入由电 火花放电产生交流等离子体。

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

IPC: H01T15/00 ,  F02P3/01 ,  F02P3/04 ,  F02P23/04

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。

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

IPC: H01T13/32 ,  H01T13/39

CPC classification number: H01T13/32 ,  H01T13/20 ,  H01T13/39

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

公开(公告)号：US09368942B2

公开(公告)日：2016-06-14

申请号：US14264102

申请日：2014-04-29

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kenji Ban ,  Katsutoshi Nakayama

IPC: F23Q3/00 ,  H01T13/20

CPC classification number: H01T13/20

Abstract: An ignition plug that promotes expansion of flame and enhances spark corrosion resistance, said plug includes a center electrode; a tubular insulator holding the center electrode; a tubular metallic shell holding the insulator; and a ground electrode having a bent portion and a facing end surface. A plurality of peak voltages can be applied to the center electrode after application of a voltage for trigger discharge thereto. When a forward end surface of the center electrode and the facing end surface are projected onto a plane orthogonal to axial direction of the center electrode, the projection of the center of the forward end surface and the projection of the facing end surface overlap with each other, and the projection of a remote-side edge portion of the facing end surface which is located on the side remote from the bent portion is located within the projection of the forward end surface.

Abstract translation: 一种火花塞，其促进火焰膨胀并增强火花塞耐腐蚀性，所述塞子包括中心电极; 保持中心电极的管状绝缘体; 保持绝缘体的管状金属外壳; 以及具有弯曲部和面对端面的接地电极。 在施加用于触发放电的电压之后，可以向中心电极施加多个峰值电压。 当中心电极的前端表面和相对端面突出到与中心电极的轴向正交的平面上时，前端表面的中心和相对的端表面的突出部的突起彼此重叠 并且位于远离弯曲部分的一侧的相对端面的远侧边缘部分的突起位于前端表面的突起内。

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

IPC: H01T13/32 ,  H01T13/39

CPC classification number: H01T13/32 ,  H01T13/16 ,  H01T13/39

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。

公开(公告)号：US20140175967A1

公开(公告)日：2014-06-26

申请号：US14235824

申请日：2012-06-08

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Tomoyuki Igarashi ,  Ryuichi Ohno ,  Tatsunori Yamada ,  Katsutoshi Nakayama

IPC: H01T13/16

CPC classification number: H01T13/16 ,  F02P13/00 ,  H01T13/20 ,  H01T13/39

Abstract: A spark plug has a center electrode having an electrode base member and a core material which is disposed in the electrode base member and which predominantly contains copper, and a noble metal tip disposed at a forward end of the center electrode, and a fusion portion formed between the noble metal tip, and the electrode base member and the core material. The fusion portion is in contact with the core material in a cross section which is parallel to the center axis of the center electrode and which passes through the center axis and the fusion portion. The fusion portion contains a component of the noble metal tip, a component of the electrode base member, and a copper component forming the core material.

Abstract translation: 火花塞具有中心电极，该中心电极具有设置在电极基体中并且主要包含铜的电极基体和芯材，以及设置在中心电极前端的贵金属电极头和形成的熔融部分 在贵金属端头与电极基体和芯材之间。 熔接部与芯材以与中心电极的中心轴平行且穿过中心轴和熔融部的横截面接触。 熔融部包含贵金属电极头的成分，电极基体的成分和形成芯材的铜成分。

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

IPC: H01T13/20 ,  H01T13/32 ,  H01T13/39

CPC classification number: H01T13/32 ,  H01T13/20 ,  H01T13/39

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