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Automotive glossary: What is an Ignition Coil or Coil?

Definition of Ignition Coil: Petrol engines need a spark in order to ignite the gasoline air mixture. To engender it, a voltage of several 10.000 volts is necessary, so the vehicles conventional voltage of 12 volts has to be transformed to this high voltage by an appropriate circuit. A central component of it is the ignition coil. Basically it is an electrical winding. With later models frequently there is an ignition coil for each cylinder, to have a better prevention of breakdown.

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