Spark plug for internal combustion engine and method of manufacturing the spark plug
    53.
    发明授权
    Spark plug for internal combustion engine and method of manufacturing the spark plug 有权
    用于内燃机的火花塞和制造火花塞的方法

    公开(公告)号:US08638029B2

    公开(公告)日:2014-01-28

    申请号:US13641611

    申请日:2011-04-15

    IPC分类号: H01T13/20

    CPC分类号: H01T13/39 H01T13/32 H01T21/02

    摘要: A spark plug includes a center electrode, a ground electrode, and a noble metal tip. The noble metal tip is joined to an object member of at least one of two electrodes via a fusion zone. A projected overlap region of the noble metal tip and the fusion zone accounts for 70% or more of a projected region of the noble metal tip. The object member contains at least Si out of Al and Si such that the amount of Si is 0.4% by mass or higher and such that the total amount of Al and Si is 0.5% by mass. Multi-fusion spots exist on the surface of the fusion zone. Segments of a baseline which pass through the respective multi-fusion spots have a total length of a predetermined percentage of the length of the baseline. Joining strength to the noble metal tip can thereby be greatly improved when the member to be joined contains Si.

    摘要翻译: 火花塞包括中心电极,接地电极和贵金属电极头。 贵金属端头通过熔融区域与两个电极中的至少一个的目标构件接合。 贵金属端头和熔融区域的突出重叠区域占贵金属电极头的投影区域的70%以上。 目标构件至少包含Al和Si中的Si,使得Si的量为0.4质量%以上,并且使Al和Si的总量为0.5质量%。 融合区表面存在多个融合点。 通过相应的多融合点的基线段具有基线长度的预定百分比的总长度。 因此,当待接合部件含有Si时,能够大大提高与贵金属电极头的接合强度。

    Spark plug
    54.
    发明授权
    Spark plug 有权
    火花塞

    公开(公告)号:US08476817B2

    公开(公告)日:2013-07-02

    申请号:US13146816

    申请日:2010-01-27

    IPC分类号: H01T13/20

    CPC分类号: H01T13/39 H01T13/32

    摘要: The present invention provides a spark plug which is capable of suppressing a occurrence of crack and separation by determining a structural configuration of a melting portion formed in a junction portion between a discharge portion and a pedestal portion which form an ignition portion that protrudes from a ground electrode. In a profile line shape of a cross section including a center axis P of an ignition portion 80, an exposure surface 88 of a melting portion 83 connects a side surface 82 of a discharge portion 81 and a side surface 85 of a pedestal portion 84. Further, an exterior angle θ formed between an imaginary line Q, which passes through a boundary position X1 between the melting portion 83 and the pedestal portion 84 and a boundary position X2 between the melting portion 83 and the discharge portion 81, and the center axis P at a node C, satisfies 135°≦θ≦175°. Furthermore, a proportion T/S of a forming depth T of the melting portion 83 to an outside diameter S of the discharge portion 81 satisfies T/S≧0.5.

    摘要翻译: 本发明提供一种火花塞,其能够通过确定在形成从地面突出的点火部的排出部和基座部之间的接合部中形成的熔融部的结构构造来抑制裂纹和分离的发生 电极。 在包括点火部分80的中心轴线P的截面的轮廓线形状中,熔化部分83的暴露表面88连接排出部分81的侧表面82和基座部分84的侧表面85。 此外,在通过熔融部83和基座部84之间的边界位置X1的虚拟线Q与熔化部83与排出部81之间的边界位置X2之间形成的外角θ和中心轴 P在节点C处满足135°@ @ @ 175°。 此外,熔融部83的成形深度T与排出部81的外径S的比例T / S满足T /S≥0.5。

    Spark plug having a ground electrode of specific alloy composition to which a noble metal tip is joined
    55.
    发明授权
    Spark plug having a ground electrode of specific alloy composition to which a noble metal tip is joined 有权
    具有接合有贵金属电极头的特定合金组成的接地电极的火花塞

    公开(公告)号:US08410673B2

    公开(公告)日:2013-04-02

    申请号:US13062571

    申请日:2009-09-09

    IPC分类号: H01T13/28

    摘要: A spark plug having a center electrode and a ground electrode including a ground electrode main body part having an end thereof facing the center electrode and a noble metal tip joined to the ground electrode main body part at a position facing a leading end of the center electrode, a spark discharge gap being formed between the leading end of the center electrode and the noble metal tip, wherein at least a portion of the ground electrode main body part, to which the noble metal tip is joined, is made of an Ni alloy containing 12 to 45 mass % of Cr, 7 mass % or less of Fe, 0.5 to 5 mass % of Al, 0.3 to 5 mass % of Si and 50 mass % or more of the balance, and wherein the joined portion and the noble metal tip are joined by laser welding or electron beam welding.

    摘要翻译: 一种火花塞,其具有中心电极和接地电极,该火花塞具有接地电极主体部分,该接地电极主体部分的端部面向中心电极;以及贵金属电极头,其在面向中心电极前端的位置处接合到接地电极主体部分 在中心电极的前端和贵金属电极头之间形成有火花放电间隙,其中与贵金属电极头接合的接地电极主体部分的至少一部分由含有 12〜45质量%的Cr,7质量%以下的Fe,0.5〜5质量%的Al,0.3〜5质量%的Si和50质量%以上的余量,其中,接合部和贵金属 尖端通过激光焊接或电子束焊接连接。

    Spark plug
    56.
    发明授权
    Spark plug 有权
    火花塞

    公开(公告)号:US08378560B2

    公开(公告)日:2013-02-19

    申请号:US12743022

    申请日:2008-11-14

    IPC分类号: H01T13/20

    CPC分类号: H01T13/39 C22C5/04

    摘要: An ignition part (80) of a ground electrode (30) includes a fused part (85) in which construction materials of a base portion (82) and a noble metal member (81) are fused and mixed by performing laser welding on the two. In the fused part (85), an average ratio P of components originated from the noble metal member (81) at points K1, L1, and M1 is equal to or greater than 80%, and an average ratio Q of components originated from the base portion at points K3, L3, and M3 is equal to or higher than 20%, and P+Q is equal to or higher than 160%. Accordingly, it is possible to obtain joining strength in the parts in the ignition part (80), thereby sufficiently preventing the generation of cracks, separation, and the like due to thermal stress.

    摘要翻译: 接地电极(30)的点火部(80)包括:熔融部(85),其中基部(82)和贵金属部件(81)的构造材料通过在两者上进行激光焊接而熔融混合 。 在熔融部(85)中,在点K1,L1,M1处,来自贵金属构件(81)的成分的平均比例P为80%以上,来自 点K3,L3,M3处的基极部分等于或高于20%,P + Q等于或高于160%。 因此,可以获得点火部(80)的各部分的接合强度,从而充分防止由于热应力而产生裂纹,分离等。

    Spark plug and weld metal zone
    57.
    发明授权
    Spark plug and weld metal zone 有权
    火花塞和焊缝金属带

    公开(公告)号:US08294344B2

    公开(公告)日:2012-10-23

    申请号:US12810767

    申请日:2008-12-25

    IPC分类号: H01T13/20

    CPC分类号: H01T13/39

    摘要: A spark member (70) is formed by joining a noble metal member (71) and an intermediate member (75) and is provided in a spark discharge gap between a center electrode and a ground electrode (30). A bottom surface (80) of the intermediate member (75) is resistance-welded to an inner surface (33) of the ground electrode (30), and a weld metal zone (73) is formed in the region of joint therebetween. As viewed on the section of the spark member (70) which contains a centerline (Q), the weld metal zone (73) is reliably formed within the range of the length (D) of a columnar portion (76) as measured along a direction orthogonal to the projecting direction of the spark member (70) and has a length (d) of at least 0.1 times (10% of) the length (D).

    摘要翻译: 通过将贵金属构件(71)和中间构件(75)接合而形成火花构件(70),并且设置在中心电极和接地电极(30)之间的火花放电间隙中。 中间构件(75)的底表面(80)被电阻焊接到接地电极(30)的内​​表面(33),并且在它们之间的接合区域中形成焊接金属区域(73)。 如在包含中心线(Q)的火花部件(70)的部分观察的,焊接金属区域(73)可以沿着沿着柱状部分(76)的长度(D)的范围被可靠地形成, 具有与火花部件(70)的突出方向垂直的方向,并且长度(d)为长度(D)的至少0.1倍(10%)。

    Spark plug for use in an internal-combustion engine with a bilayer ground electrode
    58.
    发明授权
    Spark plug for use in an internal-combustion engine with a bilayer ground electrode 有权
    用于具有双层接地电极的内燃机的火花塞

    公开(公告)号:US08072125B2

    公开(公告)日:2011-12-06

    申请号:US11687828

    申请日:2007-03-19

    IPC分类号: H01T13/32 H01T13/39

    摘要: A spark plug 100 comprised of a metal shell 1, an insulator 2, a center electrode 3 and a ground electrode 4. A rear-end face of the ground electrode 4 is welded to a front-end face of the metal shell 1, and a bent portion 5 located at the intermediated position in the longitudinal direction is bent toward the center of the spark plug 100. The ground electrode 4 assumes a circular-shape with a diameter of 2 mm or less whereby an inflow of an air-fuel mixture is not disturbed even when the air-fuel mixture directly flows into a back face of the ground electrode 4. The ground electrode 4 is comprised of an outer layer 4A made of a nickel alloy and an inner layer 4B made of pure copper with an excellent thermal conductivity, in which a ratio of a cross-sectional area of the inner layer 4B to the entire cross-sectional area of the ground electrode 4 is 10% or more to 35% or less. Thus, the spark plug 100 which is excellent in heat sinking ability and can prevent a spring back phenomenon due to a difference in a coefficient of thermal expansion.

    摘要翻译: 由金属壳1,绝缘体2,中心电极3和接地电极4构成的火花塞100.接地电极4的后端面焊接在金属壳1的前端面上, 位于中间位置的弯曲部分5朝向火花塞100的中心弯曲。接地电极4呈直径为2mm或更小的圆形,由此空气 - 燃料混合物 即使当空气 - 燃料混合物直接流入接地电极4的背面时也不会受到干扰。接地电极4包括由镍合金制成的外层4A和由纯铜制成的内层4B,其具有优异的 内层4B的截面积与接地电极4的整个横截面积的比率为10%以上且35%以下的导热率。 因此,具有散热能力优异且能够防止由于热膨胀系数的差异引起的弹回现象的火花塞100。

    SPARK PLUG
    59.
    发明申请
    SPARK PLUG 有权
    SPARK插头

    公开(公告)号:US20100253203A1

    公开(公告)日:2010-10-07

    申请号:US12743022

    申请日:2008-11-14

    IPC分类号: H01T13/39

    CPC分类号: H01T13/39 C22C5/04

    摘要: An ignition part (80) of a ground electrode (30) includes a fused part (85) in which construction materials of a base portion (82) and a noble metal member (81) are fused and mixed by performing laser welding on the two. In the fused part (85), an average ratio P of components originated from the noble metal member (81) at points K1, L1, and M1 is equal to or greater than 80%, and an average ratio Q of components originated from the base portion at points K3, L3, and M3 is equal to or higher than 20%, and P+Q is equal to or higher than 160%. Accordingly, it is possible to obtain joining strength in the parts in the ignition part (80), thereby sufficiently preventing the generation of cracks, separation, and the like due to thermal stress.

    摘要翻译: 接地电极(30)的点火部(80)包括:熔融部(85),其中基部(82)和贵金属部件(81)的构造材料通过在两者上进行激光焊接而熔融混合 。 在熔融部(85)中,在点K1,L1,M1处,来自贵金属构件(81)的成分的平均比例P为80%以上,来自 点K3,L3,M3处的基极部分等于或高于20%,P + Q等于或高于160%。 因此,可以获得点火部(80)的各部分的接合强度,从而充分防止由于热应力而产生裂纹,分离等。

    SPARK PLUG FOR INTERNAL COMBUSTION ENGINE
    60.
    发明申请
    SPARK PLUG FOR INTERNAL COMBUSTION ENGINE 有权
    火花塞用于内燃机

    公开(公告)号:US20100242888A1

    公开(公告)日:2010-09-30

    申请号:US12743092

    申请日:2008-11-13

    IPC分类号: H01T13/20

    CPC分类号: H01T13/39

    摘要: In a spark plug having a precious metal tip joined to the front end portion of a ground electrode, the stable junction state of the precious metal tip is guaranteed for a long time. A precious metal tip 32 on the side of a ground electrode 27 is not directly joined to the front end portion of the ground electrode 27 but indirectly joined with a mounting part 51 interposed therebetween. The mounting part 51 includes a base part 53 which has a disc shape and is provided with a flange part 52 on its outer periphery and a protruding part 54 which protrudes from the base part 53 and has a columnar shape. First, in the state where the precious metal tip 32 is in contact with the protruding part 54 of the mounting part 51, laser welding or the like is performed thereon to form a fused part 42 and obtain a complex, and the base part 53 of the mounting part 51 is joined to a flat surface of the ground electrode 27 by resistance welding. The grain size of the grains of the mounting part 51 in the vicinity of the fused part 42 is smaller than the grain size of the grains thereof in the vicinity of the ground electrode 27, and the grain size of the grains of the flange part 52 of the mounting part 51 is smaller than the grain size of the grains of the protruding part 54.

    摘要翻译: 在具有与接地电极的前端部连接的贵金属端头的火花塞中,能够长时间保证贵金属电极头的稳定连接状态。 接地电极27一侧的贵金属电极头32不直接接合到接地电极27的前端部,而是与插入其间的安装部51间接接合。 安装部51包括具有圆盘形状的基部53,并且在其外周上设置有凸缘部52,以及从基部53突出并具有柱状的突出部54。 首先,在贵金属端头32与安装部51的突出部54接触的状态下,进行激光焊接等来形成熔融部42并获得复合体,并且将基部53 安装部51通过电阻焊接与接地电极27的平坦面接合。 在熔接部42附近,安装部51的晶粒的粒径小于接地电极27附近的晶粒的粒径,凸缘部52的晶粒的粒径 的尺寸小于突出部54的晶粒的粒径。