Back to basics: How an ignition coil works | DENSO
https://www.denso-am.eu/news/deneur21_04_ignition-coil-basic-principles
WEBFeb 16, 2021 · In an ignition coil, the primary and secondary windings are wrapped around an iron core, which helps concentrate and enhance the strength of the magnetic field and flux, thus making the ignition coil more efficient. DENSO is a long-standing leader in direct ignition technology, and DENSO’s ignition coils are available to the aftermarket.
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