What is the purpose of an ignition coil in a gasoline engine?

The ignition coil plays a crucial role in the operation of a gasoline engine by converting the lower voltage from the battery into a significantly higher voltage. This high voltage is essential for generating a spark at the spark plugs, which ignites the air-fuel mixture in the engine's combustion chamber.

This function is vital for ensuring that the combustion process occurs effectively and consistently, allowing the engine to run smoothly. Without the ignition coil's capability to produce this high voltage spark, the engine would not be able to start or operate correctly, as the necessary ignition of the fuel could not take place. The other options address different components and functions that do not pertain to the ignition system and its role in engine operation.