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    • 38. 发明授权
    • Ignition coil for use in engine and engine having plastic cylinder head cover
    • 用于发动机和发动机的点火线圈,具有塑料气缸盖罩
    • US07013883B2
    • 2006-03-21
    • US10448128
    • 2003-05-30
    • Junichi ShimadaNoboru SugiuraYoichi AnzoEiichiro KondoKazutoshi KobayashiTakahide KosaiToshiaki Ueda
    • Junichi ShimadaNoboru SugiuraYoichi AnzoEiichiro KondoKazutoshi KobayashiTakahide KosaiToshiaki Ueda
    • F02P15/00
    • H01T13/44F02D2400/18F02P3/02F02P3/0435F02P11/00F02P13/00H01F27/022H01F27/29H01F27/325H01F27/327H01F27/40H01F38/12H01F41/064H01F2005/025H01F2038/122H01F2038/125H01F2038/127
    • To improve an anti-heat shock performance and an electric field concentration relaxation (an insulation performance) between a secondary coil and a center core, to attain a narrow diameter structure in an individual ignition type ignition coil and further to improve an assembling working of the ignition coil. The individual ignition type ignition coil is adopted to an engine having a plastic head cover. A secondary coil 3 is positioned at an inner side of a primary coil 5 and between a secondary bobbin 2 and a center core 1 a soft epoxy resin 17 is filled up. In the secondary bobbin 2, a secondary coil low voltage side is a potting side of the soft epoxy resin 17 and an inclination having a difference in an inner diameter is provided on the inner diameter in which the secondary coil low voltage side is formed large and secondary coil high voltage side is formed small. In the secondary bobbin, a thickness in the secondary coil low voltage side is formed thin and a thickness in the secondary coil high voltage side is formed thick. The soft epoxy resin 17 has a dent 17′ according to a compression molding and has a glass transition point Tg which satisfies a condition of [an allowable stress of the secondary bobbin > a generation stress at (from −40° C. to a glass transition point of an insulation resin)]. The secondary bobbin is formed by PPS and the primary bobbin is set to the primary coil at outer side of the secondary assembling body and under an assembling condition the winding is carried out.
    • 为了提高次级线圈和中心芯之间的抗热冲击性能和电场集中松弛(绝缘性能),在单个点火式点火线圈中获得窄直径结构,并且进一步改善了组装工作 点火线圈。 单个点火式点火线圈用于具有塑料盖罩的发动机。 次级线圈3位于初级线圈5的内侧,在次级线轴2和中心芯1之间,填充有软质环氧树脂17。 在次级绕线筒2中,次级线圈低压侧是软质环氧树脂17的灌封侧,在形成次级线圈低压侧的内径上设有内径差异的倾斜, 次级线圈高压侧形成较小。 在副绕线筒中,次级线圈低压侧的厚度形成得较薄,二次线圈高压侧的厚度形成得较厚。 软环氧树脂17根据压缩成型具有凹部17',并且具有玻璃化转变点Tg,该玻璃化转变点Tg满足[从副线轴的允许应力>(从-40℃到玻璃的发生应力)的条件 绝缘树脂的转变点)]。 次级绕线筒由PPS形成,并且主绕组被设定在次级组装体的外侧的初级线圈,并且在组装条件下进行绕组。