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    • 8. 发明申请
    • SPARK PLUG WITH TAPERED FIRED-IN SUPPRESSOR SEAL
    • SPARK插头带有切割式防喷器密封
    • WO2007147030A2
    • 2007-12-21
    • PCT/US2007/071174
    • 2007-06-14
    • FEDERAL-MOGUL CORPORATIONHOFFMAN, John, W.LYKOWSKI, James, D.
    • HOFFMAN, John, W.LYKOWSKI, James, D.
    • H01T13/20
    • H01T13/41
    • A spark plug (10) for a spark ignited internal combustion engine includes a suppressor seal pack (54) interposed between an upper terminal stud (46) and a lower center electrode (60). The suppressor seal pack (54) includes a top layer of conductive glass (52) surrounding the bottom end (50) of the terminal stud (46) and a lower glass seal layer (58) surrounding a head (62) of the center electrode (60). A resistor layer (56) fills the space between the conductive glass layers (52, 58). The resistor layer (56) has a larger first cross-sectional area (76) at its upper end and a smaller second crosssectional area (78) at its lower end. A reducing taper (80) establishes a progressive transition between the greater and lesser cross-sectional areas (76, 78). The reducing taper (80) is located in a large shoulder region (LS) which is defined as the longitudinal dimension between the theoretical reference point (70) at the filleted transition (26) and the theoretical reference point (68) at the upper seat (17). The suppressor seal pack (54) is of the fired-in variety in which each layer (54, 56, 58) is separately filled as a granular material, tamped and then cold pressed using the terminal stud (46). The assembly is then heated in a furnace, then removed so that the terminal stud (46) can be used to hot press the suppressor seal pack (54) into a final, operative condition. The suppressor seal pack (54) has a length (SL) which is maximized by use of a positive "A" dimension (+A) defined as the longitudinal distance between the center electrode head (62) seat and the theoretical location (72) of the lower seat (19).
    • 用于火花点火式内燃机的火花塞(10)包括插在上端子柱(46)和下中心电极(60)之间的抑制密封组件(54)。 抑制密封组件(54)包括围绕端子柱(46)的底端(50)的导电玻璃(52)的顶层和围绕中心电极头部(62)的下玻璃密封层(58) (60)。 电阻层(56)填充导电玻璃层(52,58)之间的空间。 电阻层(56)在其上端具有较大的第一横截面面积(76),在其下端具有较小的第二横截面积(78)。 减小锥度(80)建立在较大和较小横截面积(76,78)之间的逐渐过渡。 减速锥(80)位于大的肩部区域(LS)中,该大肩部区域(LS)被定义为在切割过渡处的理论参考点(70)和上座椅的理论参考点(68)之间的纵向尺寸 (17)。 抑制密封组件(54)具有烧制品种,其中每个层(54,56,58)分别被填充为粒状材料,被夯实然后使用端子柱(46)进行冷压。 然后将组件在炉中加热,然后除去,使得端子螺柱(46)可用于将抑制器密封组件(54)热压到最终的操作状态。 抑制密封组件54的长度(SL)通过使用被定义为中心电极头(62)座与理论位置(72)之间的纵向距离的正“A”尺寸(+ A)最大化, 的下座(19)。