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公开(公告)号：EP3621165A1
公开(公告)日：2020-03-11
申请号：EP19206497.0
申请日：2011-09-22
摘要： In a spark plug, a fusion zone where a ground electrode and a noble metal tip are fused together is formed in at least a portion of an interfacial region between the ground electrode and the noble metal tip. When the fusion zone is projected in the axial direction, the projected fusion zone overlaps 70% or more of the area of the noble metal tip. As viewed on a section which passes through the center of gravity of the noble metal tip and is perpendicular to the longitudinal direction of the ground electrode, the relational expression 1.3 ≤ B/A is satisfied, where A is the greatest thickness of the fusion zone along the axial direction, and B is the length from a portion having the greatest thickness of the fusion zone to the inner end of the fusion zone.
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公开(公告)号：EP2790281A2
公开(公告)日：2014-10-15
申请号：EP14169825.8
申请日：2010-03-25
摘要： In order to improve the welding strength between a ground electrode and a noble metal tip, a spark plug is equipped with an insulating body having an axial hole that penetrates in the axial direction, a center electrode disposed at the tip of the axial hole, a substantially tubular main fitting that holds the insulating body, a ground electrode having one end attached to the end of the main fitting and the other end facing the tip of the center electrode, and a noble metal tip that is disposed on the surface of the ground electrode facing the tip of the center electrode and that forms a spark discharge gap between the tip and the center electrode. The melting of the ground electrode and the noble metal tip forms a fused section on at least one portion of the area between the ground electrode and the noble metal tip. If the thickness of the part of the fused section that is the thickest in the axial direction is set as (A) and the length of the part of the fused section that is the longest in the longitudinal direction of the ground electrode is set as (B), the spark plug satisfies the following relationship: 1.5 ≤ B/A.
摘要翻译： 为了提高接地电极和贵金属电极头之间的焊接强度，火花塞配备有具有沿轴向贯通的轴向孔的绝缘体，设置在轴孔前端的中心电极， 保持绝缘体的基本上管状的主配件，接地电极，其一端连接到主配件的端部，另一端面对中心电极的前端，以及设置在地面的贵金属电极头 电极面对中心电极的尖端并且在尖端和中心电极之间形成火花放电间隙。 接地电极和贵金属电极尖端的熔化在接地电极和贵金属电极头之间的区域的至少一部分上形成熔融部分。 如果将在轴向上最厚的熔融部的部分的厚度设定为（A），将熔融部的在接地电极的长度方向最长的部分的长度设为（ B），火花塞满足以下关系：1.5‰¤B/ A。
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公开(公告)号：EP2814124B1
公开(公告)日：2017-03-22
申请号：EP14171407.1
申请日：2014-06-05
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公开(公告)号：EP2421103B1
公开(公告)日：2017-02-01
申请号：EP11006686.7
申请日：2011-08-16
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公开(公告)号：EP2073328B1
公开(公告)日：2015-05-20
申请号：EP08022176.5
申请日：2008-12-19
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公开(公告)号：EP2800215A3
公开(公告)日：2015-01-21
申请号：EP14166663.6
申请日：2014-04-30
发明人： Ban, Kenji , Nakayama, Katsutoshi
IPC分类号： H01T13/20
CPC分类号： H01T13/20
摘要： An ignition plug includes a center electrode (20); a tubular insulator (30) which holds the center electrode (20) such that a forward end portion of the center electrode (20) projects therefrom; a tubular metallic shell (50) which holds the insulator (30); and a ground electrode (10) whose one end (11) is joined to the metallic shell (50) and whose other end (12) is a free end. The ground electrode (10) has a bent portion (13) formed between the one end (11) and the other end (12), and a facing end surface (S2) which faces a forward end surface (S1) of the forward end portion of the center electrode (20). When the forward end surface (S1) and the facing end surface (S2) are projected onto a plane orthogonal to the axial direction of the center electrode (20), the projection of the center of the forward end surface (S1) and the projection of the facing end surface (S2) overlap with each other, and the projection of a remote-side edge portion of the facing end surface (S2) which is located on the side remote from the bent portion (13) is located within the projection of the forward end surface (S1).
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7.发明授权
公开(公告)号：EP2063508B1
公开(公告)日：2014-04-23
申请号：EP08020257.5
申请日：2008-11-20
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公开(公告)号：EP2555353A2
公开(公告)日：2013-02-06
申请号：EP12179249.3
申请日：2012-08-03
IPC分类号： H01T13/34
摘要： [Objective] To provide a technique for lowering power loss involved in supply of high-frequency electric power to an ignition plug.
[Means for Solution] An ignition plug includes a tubular insulator having an axial bore extending therethrough in the direction of an axis; a center electrode disposed in a forward end portion of the axial bore; a metal terminal disposed rearward of the center electrode in the axial bore, electrically connected to the center electrode, and supplied with high-frequency electric power from an external source; a metallic shell disposed in such a manner as to circumferentially surround the insulator; and a ground electrode electrically connected to the metallic shell and adapted to generate plasma in cooperation with the center electrode through supply of high-frequency electric power to the metal terminal.
At least a portion of the inner surface of the axial bore is coated with metal coating; the center electrode is in electrical contact with the metal coating; and the metal terminal is in electrical contact with the metal coating at a position located rearward of the center electrode.-
9.发明公开Spark plug for internal combustion engine and method for producing the spark plug 有权ZündkerzefürVerbrennungsmotoren und Verfahren zur Herstellung derZündkerze
公开(公告)号：EP2063508A2
公开(公告)日：2009-05-27
申请号：EP08020257.5
申请日：2008-11-20
摘要： A spark plug including: a center electrode; a substantially cylindrical insulator; a cylindrical metal shell; a ground electrode having a base end joined to a leading end portion of the metal shell and a distal end bent toward the axis line. The ground electrode includes: a thick portion provided on a base end side, a thin portion provided on a distal end side, and a stepped portion provided on an inner peripheral surface between the thick portion and the thin portion. A noble metal tip is joined to and partially embedded in the inner peripheral surface of the thin portion and disposed to form a gap between the noble metal tip and the leading end portion of the center electrode.
摘要翻译： 一种火花塞，包括：中心电极; 基本上圆柱形的绝缘体; 圆柱形金属外壳; 接地电极，其具有接合到所述金属壳的前端部的基端和朝向所述轴线弯曲的远端。 接地电极包括：设置在基端侧的厚壁部，设置在前端侧的薄壁部和设置在厚壁部与薄壁部之间的内周面的台阶部。 贵金属端头接合并部分地嵌入在薄壁的内周面中，并且设置成在贵金属端头和中心电极的前端部之间形成间隙。
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公开(公告)号：EP2790281B1
公开(公告)日：2020-07-08
申请号：EP14169825.8
申请日：2010-03-25
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