What is the relationship between throttle position and fuel delivery?

The correct relationship between throttle position and fuel delivery is that throttle position directly affects the amount of air drawn into the engine, which in turn modulates fuel delivery. When the throttle is opened, more air enters the engine, creating a need for increased fuel to maintain the correct air-fuel mixture for combustion. This relationship is critical for ensuring that the engine operates efficiently and effectively.

The fuel metering system is designed to compensate for varying air intake, providing the necessary amount of fuel based on the throttle position. This is crucial because the air-fuel mixture must remain at an optimal ratio to maximize performance and minimize harmful emissions. As the throttle opens wider, the engine control unit (ECU) signals the fuel injectors to deliver more fuel, ensuring the engine receives the correct mixture for acceleration or power demands.

Understanding this relationship helps clarify how fuel delivery is not solely about the fuel injectors but also involves the airflow into the engine.