Internal-combustion engines – High tension ignition system – Having a specific ignition coil
Reexamination Certificate
2006-03-21
2006-03-21
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
High tension ignition system
Having a specific ignition coil
C123S1690PA
Reexamination Certificate
active
07013883
ABSTRACT:
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 coil3is positioned at an inner side of a primary coil5and between a secondary bobbin2and a center core1a soft epoxy resin17is filled up. In the secondary bobbin2, a secondary coil low voltage side is a potting side of the soft epoxy resin17and 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 resin17has a dent17′ 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.
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Anzo Yoichi
Kobayashi Kazutoshi
Kondo Eiichiro
Kosai Takahide
Shimada Jun'ichi
Gimie Mahmoud
Hitachi , Ltd.
Hitachi Car Engineering Co. Ltd.
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