What is the function of fuel injectors?

Fuel injectors play a crucial role in the engine's operation by delivering fuel directly into the combustion chamber under high pressure. This process is essential for achieving an optimal air-fuel mixture, which is crucial for efficient combustion and overall engine performance. The fuel injector atomizes the fuel, allowing it to mix thoroughly with air, facilitating more complete combustion. This results in improved engine power, fuel efficiency, and reduced emissions.

The other options describe functions that are not related to the purpose of fuel injectors. Cooling the engine, for example, is typically handled by the engine's cooling system, while lubrication is managed by the oil system. Filtering impurities is the job of the fuel filter, ensuring that only clean fuel reaches the injectors. By delivering fuel effectively, the injectors ensure that the engine runs smoothly and efficiently.