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公开(公告)号：EP3624279A1
公开(公告)日：2020-03-18
申请号：EP19206491.3
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：EP2790281B1
公开(公告)日：2020-07-08
申请号：EP14169825.8
申请日：2010-03-25
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公开(公告)号：EP2330701B1
公开(公告)日：2016-03-30
申请号：EP10015103.4
申请日：2010-11-29
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公开(公告)号：EP2790281A3
公开(公告)日：2014-10-29
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穿的轴向孔的绝缘体，设置在轴向孔的尖端处的中心电极， 保持绝缘体的大致管状的主配件;一端与主配件的端部连接，另一端与中心电极的前端相对的接地电极;以及配置在地面的贵金属端头 面向中心电极尖端的电极，并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头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断部。 如果将沿轴向厚度最厚的熔融部分的厚度设为（A），将接地电极的长度方向上最长的熔融部分的长度设为（ B）时，火花塞满足以下关系：1.5≤B/ A。
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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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