IGNITION COIL FOR INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Apr 15, 2015
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Apr 15, 2015
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Abstract
An ignition coil for an internal combustion engine includes: a center core arranged on an inner side of a primary coil and an inner side of a secondary coil; a side core arranged on an outer side of the primary coil and an outer side of the secondary coil, and combined with the center core to form a closed magnetic circuit; one or a plurality of gaps provided between the center core and the side core, or in the side core; and a magnet arranged in each of the one or a plurality of gaps, in which a sum of cross-sectional areas of the respective magnets is set to be three times or more and less than seven times of a cross-sectional area of the center core.
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