Conventional ignition refers to the traditional method of starting an internal combustion engine using a spark plug. In this system, a battery provides electrical energy to the ignition coil, which transforms the low voltage into a high voltage. This high voltage creates a spark at the spark plug, igniting the air-fuel mixture in the engine's combustion chamber. This ignition process is crucial for the engine's operation, as it initiates the combustion cycle that powers the vehicle. Conventional ignition systems are commonly found in many older vehicles and are often simpler and easier to repair compared to modern ignition technologies like distributor-less ignition systems or coil-on-plug systems.