公开(公告)号：US10250016B2

公开(公告)日：2019-04-02

申请号：US15461576

申请日：2017-03-17

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Yuichi Yamada ,  Kenji Ban

IPC: F02P13/00 ,  H01T15/00 ,  H01T13/05 ,  H01T13/41

Abstract: An ignition system that uses a technique capable of restraining radiation of noise caused by discharge of a spark plug in the ignition system. The ignition system includes a spark plug and a power supply section. The spark plug is attached to an engine head. The power supply section has a battery having a ground terminal, and an ignition coil which transforms a voltage of the battery and supplies a transformed voltage to the spark plug. In the ignition system, a metallic shell of the spark plug is fixed to the engine head while being electrically insulated from the engine head through an insulator; an electrically conductive path is connected to the metallic shell; and the electrically conductive path is electrically connected to the ground terminal of the battery while being electrically insulated from the engine head.

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：US20140239797A1

公开(公告)日：2014-08-28

申请号：US14349476

申请日：2012-12-06

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kenji Ban

IPC: H01T13/32

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

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. The center is located at a front end side in a direction of the axis with respect to a front end of the center electrode. L/X≦1.28 is satisfied, where L (mm) represents a length of the ground electrode along a central axis of the ground electrode and X (mm) represents a projection length of the ground electrode relative to a metallic shell. 8.4≦(S1/S2)/A is satisfied, where S1 (mm2) represents a cross section area of a portion at a base end side with respect to a portion where the tip is joined to the ground electrode in cross section perpendicular to a central axis, S2 (mm2) represents a cross section area of the tip in cross section perpendicular to a projection direction of the tip, and A (mm) represents a projection length of the tip relative to the front end face.

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。 中心位于相对于中心电极的前端的轴线方向的前端侧。 L / X＆nlE; 1.28，其中L（mm）表示接地电极沿着接地电极的中心轴的长度，X（mm）表示接地电极相对于金属壳的突出长度。 8.4＆nlE;（S1 / S2）/ A，其中S1（mm2）表示相对于尖端接合到接地电极的部分的基端侧部分的横截面垂直于 中心轴S2（mm2）表示与尖端的投影方向垂直的截面的截面积，A（mm）表示尖端相对于前端面的突出长度。

公开(公告)号：US11715933B2

公开(公告)日：2023-08-01

申请号：US17425522

申请日：2020-11-19

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kenji Ban ,  Tatsuya Gozawa

IPC: H01T13/32 ,  H01T13/08 ,  H01T13/34

CPC classification number: H01T13/08 ,  H01T13/32 ,  H01T13/34

Abstract: A spark plug includes a center electrode, a tubular metallic shell which holds the center electrode therein in an insulated state, and a ground electrode which faces a forward end portion of the center electrode. The metallic shell has a penetration hole which penetrates the metallic shell in a direction intersecting an axial direction. The ground electrode has a press-fitted portion inserted into the penetration hole and fixed to the metallic shell, a projecting portion projecting toward an inner side of the metallic shell, and an insertion portion disposed between the press-fitted portion and the projecting portion, inserted into the penetration hole, and forming a space between the insertion portion and an inner surface of the penetration hole. An angle α formed between the inner surface of the penetration hole and an outer surface of the insertion portion falls within a range of 0°

公开(公告)号：US10944244B2

公开(公告)日：2021-03-09

申请号：US16815390

申请日：2020-03-11

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kenji Ban ,  Tatsuya Gozawa

IPC: H01T13/06 ,  H01T13/32 ,  H01T21/02 ,  H01T13/39

Abstract: A spark plug includes a plug cap having a plurality of through holes. In a cross section including an axial line, the plug cap includes an enlarging portion in a portion of a region between a first imaginary straight line and a second imaginary straight line, the first imaginary straight line extending through a front end of the end portion of a ground electrode and being perpendicular to the axial line, the second imaginary straight line extending through a back end of one of inner open ends of the through holes that is closest to a front end of the spark plug and being perpendicular to the axial line. The enlarging portion being a portion in which a minimum distance from an outer surface to an inner surface of the plug cap increases with increasing distance in a direction from back to front.

公开(公告)号：US10178751B2

公开(公告)日：2019-01-08

申请号：US15938368

申请日：2018-03-28

Applicant: NGK Spark Plug Co., LTD.

Inventor： Kohei Usami ,  Kenji Ban

IPC: H01T13/32 ,  H01T13/52 ,  H01T13/20 ,  H01T13/34 ,  H05H1/52

Abstract: An ignition plug includes a center electrode; a cylindrical insulator that surrounds at least the circumference of a front end portion of the center electrode and that includes a bottom portion at the front side; and a cylindrical metal shell that holds the insulator from the outer circumference side. The center electrode includes a shaft portion that extends along an axial line and a head portion disposed at a front end of the shaft portion. The head portion has a width greater than that of the shaft portion in the radial direction. The insulator includes a first and second insulator. The first insulator has an axial hole and a diameter smaller than the maximum diameter of the head portion. The second insulator is joined to the first insulator. The shaft portion is disposed in the axial hole of the first insulator. The second insulator encloses the head portion.

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：US09325156B2

公开(公告)日：2016-04-26

申请号：US14590075

申请日：2015-01-06

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kenji Ban ,  Yoshikazu Kataoka ,  Magoki Shimadate ,  Tomoaki Kato

IPC: H01T13/20 ,  H01T13/32

CPC classification number: H01T13/32 ,  H01T13/16 ,  H01T13/20

Abstract: A spark plug wherein an outer diameter of a first face that is a gap foliating face of the center electrode tip is denoted as R1, an outer diameter of a second face that is a gap forming face of the ground electrode tip is denoted as R2, a length of the gap is denoted as G1, and an average distance of a distance between an end in the first direction of the first face and an end in the first direction of the second face and a distance between an end in the second direction of the first face and an end in the second direction of the second face is denoted as G2, R1

Abstract translation: 将作为中心电极头的间隙面的第一面的外径表示为R1的火花塞，作为接地电极头的间隙形成面的第二面的外径表示为R2， 间隔的长度表示为G1，第一面的第一方向的端部与第二面的第一方向的端部之间的距离与第二面的端部的距离之间的距离的平均距离 第二面的第一面和第二方向的端部表示为G2，R1

公开(公告)号：US10522978B2

公开(公告)日：2019-12-31

申请号：US15769120

申请日：2016-10-07

Applicant: Mitsubishi Electric Corporation ,  NGK SPARK PLUG CO., LTD.

Inventor： Taichiro Tamida ,  Takahiro Inoue ,  Takashi Hashimoto ,  Akira Nakagawa ,  Tomokazu Sakashita ,  Takayoshi Nagai ,  Kimihiko Tanaya ,  Hiroyuki Kameda ,  Yuichi Yamada ,  Kenji Ban

IPC: H01T13/32 ,  F02P3/01 ,  F02B23/08 ,  F02P13/00 ,  F02P5/145

Abstract: In an ignition plug, since a ground electrode is formed in a thin-rod-shape or a mesh-like shape, sufficiently strong radicals are locally generated by a barrier discharge, an anti-inflammation effect by the electrode is small, and the growth of a flame is hardly hindered. Furthermore, by making the thickness dimension of a second dielectric facing a discharge region uniform, the barrier discharge is spread over the surface of the second dielectric, the generation of the radicals is maintained, and combustibility after ignition is promoted. Furthermore, because an end portion of a high voltage electrode and a ground electrode are disposed to face each other within a combustion chamber, a fuel gas introduced into the combustion chamber is liable to flow into the discharge region, and is easily ignited by the radicals generated due to the discharge.

公开(公告)号：US09548592B2

公开(公告)日：2017-01-17

申请号：US14582801

申请日：2014-12-24

Applicant: NGK Spark Plug Co., LTD.

Inventor： Tadatoshi Fujino ,  Kenji Ban ,  Yuichi Yamada

IPC: H01T13/39 ,  H01T13/16 ,  H01T13/20

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

Abstract: A sparkplug includes: an insulator with an axial hole extending along an axial line; a metal shell covering the insulator; and a shelf part inside the metal shell. The insulator includes a second column part formed in the front end side of a tapering part. When a volume surrounded by a first plane that passes through the front end of the shelf part of the metal shell and is orthogonal to the axial line, a curved surface extending from an outer circumference of the second column part, and an outer circumferential surface of the insulator is defined as A, and a volume surrounded by the first plane, the curved surface, a second plane that passes through the front end of the metal shell and is orthogonal to the axial line, and the axial hole of the insulator is defined as B, a relational expression 0.9≦A/B≦2.4 is satisfied.

Abstract translation: 火花塞包括：具有沿轴线延伸的轴向孔的绝缘体; 覆盖绝缘体的金属壳; 和金属外壳内的搁板部分。 绝缘体包括形成在锥形部的前端侧的第二柱部。 当由第一平面包围的体积通过金属壳的搁架部分的前端并且与轴线正交时，从第二柱部分的外圆周延伸的弯曲表面和 绝缘体被定义为A，由第一平面，弯曲表面，穿过金属壳的前端并与轴线正交并与绝缘体正交的第二平面所围绕的体积和绝缘体的轴向孔被限定 作为B，满足关系式0.9≤A/B≤2.4。