What is the main function of an ignition coil in a vehicle?

The main function of an ignition coil in a vehicle is to convert low voltage from the battery into high voltage. This high voltage is essential for creating a spark at the spark plugs, which ignites the air-fuel mixture in the engine's combustion chamber. The ignition coil operates on the principle of electromagnetic induction, where a magnetic field is generated when current flows through a primary winding. This magnetic field then induces a much higher voltage in a secondary winding, which allows the spark plug to generate a spark strong enough to ignite the fuel-air mixture.

This process is vital for the engine's performance, as a strong and reliable spark is necessary for efficient combustion. Without the ignition coil functioning correctly, the engine may experience misfires, poor performance, or failure to start. Hence, understanding the ignition coil's role highlights its critical importance in the ignition system of the vehicle.