What is the function of the ignition system in a vehicle?

The ignition system in a vehicle is primarily responsible for starting the engine and maintaining its operation while running. When the ignition system is activated, it generates a high-voltage spark that ignites the air-fuel mixture in the engine's cylinders. This ignition process is crucial because it initiates the combustion cycle, allowing the engine to produce power. Without a functioning ignition system, the engine would not start, and even if it did, it would not be able to continue running efficiently.

The other functions mentioned in the other options are not part of the ignition system's primary role. While controlling the speed of the vehicle is managed by the transmission and the throttle system, air intake management is the responsibility of the intake system and engine management systems. Monitoring battery status falls under the domain of the electrical system and the vehicle's onboard computer, ensuring that the electrical components receive the necessary voltage for operation. Thus, the ignition system's main focus is on initiating and sustaining engine operation through ignition.