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公开(公告)号：US20150207299A1
公开(公告)日：2015-07-23
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: H01T13/32
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
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公开(公告)号：US20180041013A1
公开(公告)日：2018-02-08
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：US20160369764A1
公开(公告)日：2016-12-22
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.
Abstract translation: 在火花塞中，从金属壳突出到前侧的绝缘体的一部分的体积V1等于或大于45mm 3; 并且满足表达式0.18≤V2/V1≤0.37，其中H是绝缘体从金属壳向轴向突出到前侧的长度，V2是绝缘体的一部分的体积，其突出 从绝缘体的前端沿轴向的长度H / 2。
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公开(公告)号：US20210399532A1
公开(公告)日：2021-12-23
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：US20200287358A1
公开(公告)日：2020-09-10
申请号：US16801497
申请日：2020-02-26
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Tatsuya GOZAWA , Kenji BAN
IPC: H01T13/16
Abstract: A spark plug that can suppress pre-ignition of a combustible air-fuel mixture that has flowed into the sub-chamber. The spark plug includes a ground electrode that joins to a metal shell and forms a spark gap; and a cap member that covers a center electrode and the ground electrode and forms a sub-chamber. A first fused portion that joins the metal shell and the cap member is located on the front-end side relative to the spark gap. At least a part of a first facing portion at which the metal shell and the cap member face each other is located on the sub-chamber side relative to the first fused portion. The first fused portion is not formed in an inner peripheral surface of the metal shell and an inner peripheral surface of the cap member.
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Patent Agency Ranking
公开(公告)号：US20180301877A1
公开(公告)日：2018-10-18
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
CPC classification number: H01T13/32 , F02B23/08 , F02P3/01 , F02P5/145 , F02P13/00 , F02P15/10 , F02P23/04 , H01T13/34 , H01T13/467 , H01T13/50 , H01T13/52 , H01T13/54 , H01T19/04 , H05H1/2406 , H05H2001/2412 , H05H2001/2418
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.
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公开(公告)号：US20210359495A1
公开(公告)日：2021-11-18
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：US20210013704A1
公开(公告)日：2021-01-14
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：US20200335949A1
公开(公告)日：2020-10-22
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：US20150180215A1
公开(公告)日：2015-06-25
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
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。 当通过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，满足关系表达式0.9＆nlE; A / B＆nlE; 2.4。
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