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    • 1. 发明申请
    • SPARK PLUG FOR INTERNAL COMBUSTION ENGINES
    • 火花塞用于内燃机
    • WO1986007207A1
    • 1986-12-04
    • PCT/DE1986000198
    • 1986-05-10
    • ROBERT BOSCH GMBHBÄUERLE, AdalbertBARTHELMÄ, LudwigBENEDIKT, WalterHERDEN, WernerHOLL, WalterLIEBING, GerhardSCHMATZ, JürgenSCHWAB, SiegbertWÜRTH, Walter
    • ROBERT BOSCH GMBH
    • H01T13/38
    • H01T13/40H01T13/38
    • A spark plug (10) which is also suited for igniting lean vaporized fuel/air mixtures. This spark plug (10) surrounds, with its annular metal casing (11), an insulating body (17) which is separated into longitudinal sections and as usual contains, in the hole (20) which passes through it, an attachment bolt (31) and a central electrode (33). A longitudinal section (17/3) of the insulating body (17), surrounded by the metal casing (11), consists of dielectric material and forms, jointly with the metal casing (11) and the attachment bolt (31/2), a capacitor (18) having a capacity of 120 to 500 pF, and essentially 200 to 400 pF. In order to prevent, in the regions of the mating surfaces of the insulating body, flashovers between the attachment bolt (31/2) and the metal casing (11), and to economize costly sintering equipment for connecting the longitudinal sections of the insulating body, annular electrical insulating elements (17/2, 17/4) are arranged between the mating surfaces (24/1, 24,2), which have a rubber-like elasticity at all temperatures of the spark plug (e.g. silicon rubber, epoxy resin).
    • 火花塞(10),其也适于点燃贫气蒸发的燃料/空气混合物。 该火花塞(10)围绕其环形金属壳体(11)围绕分隔成纵向部分的绝缘体(17),并且通常在其穿过的孔(20)中包含一个安装螺栓(31) )和中心电极(33)。 由金属壳体(11)包围的绝缘体(17)的纵向部分(17/3)由电介质材料组成并与金属壳体(11)和安装螺栓(31/2)共同形成, 具有120至500pF的容量的电容器(18),并且基本上为200至400pF。 为了防止绝缘体的配合面的区域在安装螺栓(31/2)和金属壳体(11)之间闪络,并节省了用于连接绝缘体的纵向部分的昂贵的烧结设备 环形电气绝缘元件(17/2,17/4)设置在配合表面(24/1,24,2)之间,其在火花塞的所有温度(例如硅橡胶,环氧树脂)都具有橡胶状弹性 树脂)。