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公开(公告)号：EP3086422A1
公开(公告)日：2016-10-26
申请号：EP14872151.7
申请日：2014-12-16
摘要： A spark plug includes a center electrode and a ground electrode that forms a gap with the center electrode. At least one of the center electrode and the ground electrode includes a shaft portion and an electrode tip joined to one surface of the shaft portion. The shaft portion includes a first core formed of a material containing copper and a first outer layer that is formed of a material having higher corrosion resistance than the first core and covers at least part of the first core. The electrode tip includes a second outer layer that is formed of a material containing a noble metal and forms the outer surface of the electrode tip and a second core that is formed of a material having a higher thermal conductivity than the second outer layer and is at least partially covered with the second outer layer.
摘要翻译： 火花塞包括中心电极和与中心电极形成间隙的接地电极。 中心电极和接地电极中的至少一个包括轴部分和连接到轴部分的一个表面的电极尖端。 轴部包括由含铜材料形成的第一芯体和由耐腐蚀性比第一芯体高的材料形成并覆盖第一芯体的至少一部分的第一外层。 电极头包括：第二外层，其由包含贵金属的材料形成并形成电极头的外表面;以及第二芯，其由导热率高于第二外层的材料形成并且处于 至少部分地被第二外层覆盖。
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公开(公告)号：EP2383848A1
公开(公告)日：2011-11-02
申请号：EP10733363.5
申请日：2010-01-21
发明人： TANAKA, Tomoo , SUMOYAMA, Daisuke
CPC分类号： H01T13/39
摘要： A spark plug 100 has a center electrode tip 90, 95 at an end portion of an electrode. The electrode tip 90, 95 contains Pd as a main component in an amount greater than 40% by weight and contains at least one element of Ir, Ni, Co, and Fe such that Ir, if contained, is contained in an amount of 0.5% by weight to 20% by weight inclusive and at least one element of Ni, Co, and Fe, if contained, is contained in an amount of 0.5% by weight to 40% by weight inclusive on an element basis.
摘要翻译： 火花塞100在电极的端部具有中心电极头90,95。 电极头90,95以大于40重量％的量含有作为主要成分的Pd，并且含有Ir，Ni，Co和Fe中的至少一种元素，使得如果含有Ir，则其含量为0.5 以重量百分比计为20％以上，并且以元素换算含有0.5重量％以上且40重量％以下的Ni，Co及Fe中的至少1种元素（含有）。
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公开(公告)号：EP2554690A1
公开(公告)日：2013-02-06
申请号：EP11765169.5
申请日：2011-01-18
摘要： [Objective] An objective of the present invention is to provide a technique which can improve resistance to spark ablation of an electrode tip whose predominant component is Pd and restrains occurrence of separation and cracking of the electrode tip.
[Means for solution] The electrode tip located at an distal end of an electrode of a spark plug contains Pd as a predominant component in an amount of 40 wt.% or more; at least one element of Ir, Ni, Co, and Fe, wherein, when the tip contains Ir, the amount of Ir is 0.5 wt.% to 20 wt.%, and when the tip contains at least one element of Ni, Co, and Fe, the amount of the at least one element is 0.5 wt.% to 40 wt.%; and at least one element of Pt, Re, Rh, and Ru in a total amount of 5 wt.% to 40 wt.%, wherein when the tip contains at least one element of Re, Rh, and Ru, the amount of the at least one element is 10 wt.% or less, and when the tip contains Pt, the amount of Pt is 16 wt.% to 40 wt.%.摘要翻译： [目的]本发明的目的在于提供一种技术，其能够提高以Pd为主要成分的电极头的电火花烧蚀抵抗性，抑制电极头发生分离，破裂。 [解决手段]位于火花塞的电极的前端的电极头以40重量％以上的量含有作为主要成分的Pd， Ir，Ni，Co和Fe中的至少一种元素，其中当尖端包含Ir时，Ir的量为0.5重量％至20重量％，并且当尖端包含至少一种Ni元素时，Co 和Fe，所述至少一种元素的量为0.5重量％至40重量％; 以及总量为5重量％至40重量％的Pt，Re，Rh和Ru中的至少一种元素，其中当所述尖端含有Re，Rh和Ru中的至少一种元素时，所述 至少一种元素为10重量％或更少，并且当尖端含有Pt时，Pt的量为16重量％至40重量％。
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公开(公告)号：EP3113307A1
公开(公告)日：2017-01-04
申请号：EP15752403.4
申请日：2015-01-13
CPC分类号： H01T13/39 , B22F3/16 , B22F2998/10 , C22C5/04 , C22C30/00 , C22C32/001 , C22C32/0031 , H01T13/20 , H01T13/32 , H01T21/02 , C22C1/1084 , B22F3/02 , B22F3/04 , B22F3/20 , B22F3/225 , B22F3/007 , B22F3/24
摘要： An object of the present invention is to provide a spark plug which includes, at at least one of a center electrode and a ground electrode, a tip having excellent spark wear resistance in a high temperature environment, thereby having excellent durability. A spark plug includes a center electrode and a ground electrode disposed with a gap provided between the center electrode and the ground electrode. At least one of the center electrode and the ground electrode includes a tip which defines the gap. The tip includes a metal base material containing Ir as a main component, and oxide particles containing at least one of oxides having a perovskite structure represented by general formula ABO 3 (A is at least one element selected from elements in group 2 in a periodic table, and B is at least one element selected from metal elements). When a cross section of the tip is observed, an area proportion of the oxide particles is not lower than 1% and not higher than 13%.
摘要翻译： 本发明的目的在于提供一种火花塞，其在中心电极和接地电极中的至少一方具有在高温环境下耐火花磨损性优异的焊嘴，耐久性优异。 火花塞包括中心电极和接地电极，该中心电极和接地电极在中心电极和接地电极之间设置有间隙。 中心电极和接地电极中的至少一个包括限定间隙的尖端。 尖端包括含有Ir作为主要组分的金属基材和含有至少一种具有由通式ABO3表示的钙钛矿结构的氧化物的氧化物颗粒（A是选自元素周期表第2族中的至少一种元素， B是选自金属元素中的至少一种元素）。 当观察尖端的横截面时，氧化物颗粒的面积比例不低于1％且不高于13％。
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公开(公告)号：EP2738892A1
公开(公告)日：2014-06-04
申请号：EP12819925.4
申请日：2012-04-17
摘要： An object of the present invention is to provide a spark plug including a tip provided on at least one of a center electrode and a ground electrode, which spark plug, even when the noble metal content of the tip is reduced as compared with conventional cases, exhibits erosion resistance and durability, since a spark discharge gap is maintained between the center electrode and the ground electrode. The spark plug of the present invention includes a center electrode; a ground electrode provided so as to form a gap between the ground electrode and the center electrode; and a tip provided on at least one of a distal end portion of the ground electrode and a front end portion of the center electrode, the end portions facing each other, characterized in that the tip contains an element group M (M consists of at least one species of Pt and Rh) in an amount of 3 mass% to 35 mass%, and an element group L (L consists of at least one species of Ir, Ru, and Pd) in an amount of 0 mass% to 15 mass%; the total amount of the element group M and the element group L is at most 35 mass%; and the total amount of Ni, the element group M, and the element group L is at least 94 mass%.
摘要翻译： 本发明的目的在于提供一种火花塞，该火花塞具备设置在中心电极和接地电极中的至少一方上的火花塞，该火花塞即使在与以往相比尖端的贵金属含量减少的情况下， 由于在中心电极和接地电极之间保持火花放电间隙，所以具有耐腐蚀性和耐久性。 本发明的火花塞包括中心电极; 接地电极，设置成在接地电极和中心电极之间形成间隙; 以及设置在所述接地电极的远端部和所述中心电极的前端部中的至少一个上的端部，所述端部彼此面对，其特征在于，所述端部包含元件组M（M至少由 1质量％的Pt和Rh）和3质量％〜35质量％的元素组L（0质量％〜15质量％的元素组L（L由Ir，Ru和Pd中的至少一种构成） ％; 元素组M和元素组L的总量为35质量％以下， Ni，元素组M和元素组L的合计量为94质量％以上。
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公开(公告)号：EP2383848B1
公开(公告)日：2018-05-30
申请号：EP10733363.5
申请日：2010-01-21
发明人： TANAKA, Tomoo , SUMOYAMA, Daisuke
CPC分类号： H01T13/39
摘要： A spark plug 100 has a center electrode tip 90, 95 at an end portion of an electrode. The electrode tip 90, 95 contains Pd as a main component in an amount greater than 40% by weight and contains at least one element of Ir, Ni, Co, and Fe such that Ir, if contained, is contained in an amount of 0.5% by weight to 20% by weight inclusive and at least one element of Ni, Co, and Fe, if contained, is contained in an amount of 0.5% by weight to 40% by weight inclusive on an element basis.
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公开(公告)号：EP3073591A1
公开(公告)日：2016-09-28
申请号：EP14863887.7
申请日：2014-09-10
CPC分类号： H01T13/39 , B32B15/01 , B32B15/018 , C22C5/04 , C22C19/03 , C22C19/05 , C22C19/058
摘要： This invention solves a problem by providing a spark plug featuring excellent durability. The spark plug includes a tip at least one of a center electrode and a ground electrode. The spark plug with excellent durability can be achieved by reducing abnormal erosion of the tip. The spark plug includes the center electrode and the ground electrode. The center electrode is disposed providing a gap with the center electrode. At least one of the center electrode and the ground electrode includes a tip forming the gap. The tip includes a main body portion and a front surface layer. A composition of the main body portion is Pt as a main constituent and Rh of 5 mass% or more and Ni of 0 mass% or more to less than 8 mass%. The front surface layer is disposed at least at a surface radially outside of an axial line extending in a direction from a center of the main body portion to the gap. The front surface layer contains Ni of 8 mass% or more and has a thickness of 2 µm or more.
摘要翻译： 本发明通过提供具有优异耐久性的火花塞解决了问题。 火花塞包括中心电极和接地电极中的至少一个的尖端。 通过减少尖端的异常腐蚀可以实现具有优异耐久性的火花塞。 火花塞包括中心电极和接地电极。 中心电极设置为与中心电极之间提供间隙。 中心电极和接地电极中的至少一个包括形成间隙的尖端。 尖端包括主体部分和前表面层。 主体部分的组成以Pt为主成分，Rh为5质量％以上，Ni为0质量％以上且小于8质量％。 前表面层至少设置在沿着从主体部分的中心到间隙的方向延伸的轴线的径向外侧的表面处。 表面层含有8质量％以上的Ni，并且具有2μm以上的厚度。
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公开(公告)号：EP2581999A1
公开(公告)日：2013-04-17
申请号：EP11792064.5
申请日：2011-02-03
摘要： An object of the present invention is to provide a spark plug including a noble metal tip exhibiting intended durability; specifically, a noble metal tip exhibiting excellent erosion resistance, separation resistance, and breakage resistance. The spark plug of the present invention is characterized in that (1) the noble metal tip contains Mp (Mp is Pt or Pt and Pd, and the amount of Pd is 20 mass% or less with respect to the mass of the noble metal tip), Cu, and M (M is at least one element selected from the element group consisting of Rh, Ir, Ru, Re, and W) in a total amount of 95 mass% or more, and the proportions by mass of Mp, Cu, and M fall within specific ranges, or (2) the proportions by mass of Mp, Cu, and M (Mp, Cu, M) fall within specific ranges, and welding area S (mm 2 ), tip protrusion height H (mm), covering length L (mm), and tip-welded portion distance h (mm) satisfy the following relations: (a) H ≤ 0.13S + 1.18, (b) S ≤ 5, and (c) 0.1 ≤ h or 0.03 ≤ L.
摘要翻译： 本发明的目的是提供一种火花塞，其包括具有预期耐久性的贵金属电极头; 具体而言，表现出优异的耐腐蚀性，耐剥离性和耐破损性的贵金属电极头。 本发明的火花塞的特征在于，（1）贵金属电极头包含Mp（Mp是Pt或Pt和Pd，Pd的量相对于贵金属电极头的质量为20质量％以下 ），Cu和M（M是选自由Rh，Ir，Ru，Re和W构成的元素组中的至少一种元素）合计量为95质量％以上，并且质量比Mp， （2）Mp，Cu和M的质量比（Mp，Cu，M）在特定范围内，焊接面积S（mm2），焊嘴突出高度H（mm ），覆盖长度L（mm）和焊接部距离h（mm）满足以下关系：（a）H≤0.13S+ 1.18，（b）S≤5，和（c）0.1≤h或0.03 ≤L.
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