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    • 31. 发明专利
    • Spark plug
    • SPARK插头
    • JP2010113917A
    • 2010-05-20
    • JP2008284705
    • 2008-11-05
    • Ngk Spark Plug Co Ltd日本特殊陶業株式会社
    • KAMEDA HIROYUKIKATO TOMOAKI
    • H01T13/32H01T13/20H01T13/46
    • H01T13/467H01T13/32
    • PROBLEM TO BE SOLVED: To provide a spark plug improving start-up performance and smoldering prevention performance of an internal combustion engine in a low temperature environment. SOLUTION: The spark plug 1 includes a central electrode 5, an insulator 2, a main fitting 3, a main ground electrode 30, and at least two sub ground electrodes 40, wherein (i) the main electrode 30 is arranged such that the tip thereof faces a side of the tip of the central electrode 5 to form a spark discharge main gap 38 between the tip of the main ground electrode and the tip of the central electrode 5, (ii) the sub ground electrodes 40 are each arranged such that part of the end surface of the tip thereof faces the outer peripheral surface of the tip of the insulator 2, and (iii), when the main ground electrode 30 and the central electrode 5 are projected in the radial direction of the central electrode 5, the sum of the areas S of the projection regions, which are superposed on each other, of the tip of the main ground electrode 30 and the tip of the central electrode 5 satisfies the relationship of S/Av COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种在低温环境中提高内燃机的起动性能和防止闷燃性能的火花塞。 火花塞1包括中心电极5,绝缘体2,主配件3,主接地电极30和至少两个子接地电极40,其中(i)主电极30布置成 其尖端面对中心电极5的前端侧,以在主接地电极的前端与中心电极5的前端之间形成火花放电主间隙38,(ii)副接地电极40各自 其前端的一部分面向绝缘体2的前端的外周面,(iii)当主接地电极30和中心电极5沿着中心部的径向突出时 电极5,主接地电极30的尖端和中心电极5的尖端彼此叠置的投影区域的面积S之和满足S / Av <1.3的关系,其中Av 是火花放电主间隙的平均间隙距离。 版权所有(C)2010,JPO&INPIT
    • 34. 发明专利
    • Spark plug for internal combustion engine
    • 火花塞用于内燃机
    • JP2006049206A
    • 2006-02-16
    • JP2004231138
    • 2004-08-06
    • Denso CorpNippon Soken Inc株式会社デンソー株式会社日本自動車部品総合研究所
    • HORI KOENOKABE SHINICHI
    • H01T13/20H01T13/32H01T13/39
    • H01T13/32H01T13/467
    • PROBLEM TO BE SOLVED: To provide a spark plug for an internal combustion engine excellent in smoldering resistance and durability. SOLUTION: The spark plug 1 comprises an insulator 2 with a center through-hole 21, a center electrode 3 retained by the center through-hole 21, a metal fitting 4 retaining the insulator 2, a first grounding electrode 51 forming a first gap A between the tip of the center electrode 3, and the first grounding electrode and a second grounding electrode 52 forming a second gap G between the side face of the center electrode 3 the second grounding electrode. With the first gap as A, the shortest distance between the second grounding electrode 52 and the insulator 2 as B, a distance in an axial direction between the corner 522 of the grounding electrode 2 and the tip face of the insulator 2 as C, and the tip thickness of the insulator 2 as T, provided the axial direction distance C is + in the case the corner 522 of the second grounding electrode 52 is further protruded toward a tip end side from the tip face 22 of the insulator 2, following relations are satisfied: 0.4mm≤A≤1.0mm, 0.3mm≤T≤0.8mm, 0.2mm≤B≤0.9mm, -1.0mm≤C≤0.5mm. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供一种耐闷燃性和耐久性优异的内燃机用火花塞。 火花塞1包括具有中心通孔21的绝缘体2,由中心通孔21保持的中心电极3,保持绝缘体2的金属配件4,形成第一接地电极51的第一接地电极51 中心电极3的尖端与第一接地电极之间的第一间隙A和形成第二接地电极的中心电极3的侧面之间的第二间隙G的第二接地电极52。 在第一间隙为A的情况下,第二接地电极52与绝缘体2之间的最短距离为B,接地电极2的角部522与绝缘体2的前端面之间的轴向距离为C, 绝缘子2的端部厚度为T,在第二接地电极52的拐角522从绝缘体2的前端面22朝向前端侧进一步突出的情况下,轴向距离C为+ 满足:0.4mm≤A≤1.0mm,0.3mm≤T≤0.8mm,0.2mm≤B≤0.9mm,-1.0mm≤C≤0.5mm。 版权所有(C)2006,JPO&NCIPI