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公开(公告)号：US10522978B2
公开(公告)日：2019-12-31
申请号：US15769120
申请日：2016-10-07
发明人： Taichiro Tamida , Takahiro Inoue , Takashi Hashimoto , Akira Nakagawa , Tomokazu Sakashita , Takayoshi Nagai , Kimihiko Tanaya , Hiroyuki Kameda , Yuichi Yamada , Kenji Ban
摘要： 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：US09478947B2
公开(公告)日：2016-10-25
申请号：US14811160
申请日：2015-07-28
摘要： A plasma jet plug has a cavity defined by a surface of a center electrode, an inner surface of an insulator, and a surface of a ground electrode. When a volume of a portion of the cavity on a front side of a front portion of the center electrode is a first volume V1 and a volume of a portion of the cavity on a rear side of the front end of the center electrode is a second volume V2, the following expression is satisfied: V1/V2≧0.20.
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公开(公告)号：US10153618B2
公开(公告)日：2018-12-11
申请号：US15630224
申请日：2017-06-22
发明人： Naoyuki Mukoyama , Hiroyuki Kameda
IPC分类号： H01T13/32 , H01T13/08 , H01T13/38 , H01T13/39 , H01T13/16 , H01T13/20 , H01T13/34 , H01T13/36 , H01T13/41
摘要： A spark plug having an insulator with a front end portion having an annular groove opened to a front side around an axial line. The groove has a width of greater than or equal to 0.2 mm in a radial direction. In a cross section including the axial line, a value D/L obtained by dividing, by a length L, a creepage distance D, from a position P on the frontmost side of a region in which a clearance distance between an outer surface of a front end portion and an inner circumferential surface of a metal shell is less than or equal to 0.1 mm to a connection position between an outer surface of the front end portion and the axial hole, is greater than or equal to 1.1.
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公开(公告)号：US09466952B2
公开(公告)日：2016-10-11
申请号：US14719828
申请日：2015-05-22
发明人： Hiroyuki Kameda
CPC分类号： H01T13/462 , H01T13/32 , H01T13/467
摘要： A spark plug having an insulator, a metallic shell disposed around the insulator, a first ground electrode having a first surface facing a side surface of a center electrode in a radial direction so as to form a first gap, and a second ground electrode having a second surface facing the side surface of the center electrode in the radial direction so as to form a second gap. A relation 60°≦θ≦150° is satisfied, where θ is a smaller one of angles formed between a first line connecting an axial line of the center electrode and the center of the first surface and a second line connecting the axis and a center of the second surface when viewed from a forward end side toward a rear end side in the direction of the axis.
摘要翻译： 一种具有绝缘体的火花塞，设置在所述绝缘体周围的金属壳，具有在半径方向上与中心电极的侧面对置的第一面的第一接地电极，以形成第一间隙，以及第二接地电极， 第二表面在径向方向上面对中心电极的侧表面，以形成第二间隙。 满足60°≤θ≤150°的关系，其中θ是在连接中心电极的轴线和第一表面的中心的第一线和连接轴的第二线和中心之间形成的角度中的较小的一个 当从轴线的方向从前端朝向后端侧观察时。
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5.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
发明人： Kenji Ban , Hiroyuki Kameda , Kohei Usami
摘要： 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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