What is the purpose of a fuel injector in an internal combustion engine?

The fuel injector plays a crucial role in the operation of an internal combustion engine by mixing fuel with air in the correct ratio for efficient combustion. Its primary function is to spray a fine mist of fuel directly into the engine's combustion chamber or intake manifold, where it mixes with air. This precise atomization of fuel is essential for achieving optimal combustion, leading to the production of power as the engine operates.

A well-functioning fuel injector ensures that the engine runs smoothly and efficiently by providing the necessary amount of fuel at the right time, which is especially important for maintaining fuel economy and reducing emissions. Without a properly functioning fuel injector, the engine may experience issues such as rough idling, poor performance, and increased emissions, demonstrating its integral role in engine operation.

The other options pertain to different functions not fulfilled by the fuel injector, making it clear that mixing fuel and air for combustion is the correct purpose of this component.