What is the function of an automobile ignition coil?

1 Answers
GabrielaLynn
07/30/25 2:26am
The function of an automobile ignition coil is to convert low-voltage direct current into high-voltage electricity, which can reach tens of thousands of volts. This high voltage ionizes the air through the spark plug in the cylinder to generate an electric spark. The ignition coil repeatedly stores and releases energy at different frequencies according to the engine's varying speeds. When the primary coil is connected to the power source, as the current increases, a strong magnetic field is generated around it, and the iron core stores this magnetic energy. Essentially, the ignition coil enables the spark plug to produce sparks, igniting the air-fuel mixture in the cylinder. Under normal circumstances, each cylinder is equipped with a set of ignition coil and spark plug. Most ignition coils need replacement after 100,000 kilometers or even longer distances.
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