What is the function of the discharge nozzle in a fuel injected engine?

The discharge nozzle in a fuel-injected engine is designed to deliver fuel continuously into the inlet manifold, ideally as close to the inlet valve as feasible. This particular delivery location is crucial because it ensures that the atomized fuel mixes thoroughly with air before it enters the combustion chamber. By positioning the nozzle close to the inlet valve, the engine can achieve better fuel atomization and distribution, which leads to more efficient combustion and improved overall engine performance.

Injecting fuel continuously into the inlet manifold helps maintain a consistent air-fuel mixture ratio, which is important for optimal engine operation. This setup allows for a more gradual buildup of fuel vapor and provides better control over the combustion process, ultimately enhancing engine responsiveness and throttle performance.

Other options suggest that fuel is injected only during certain strokes or when the inlet valve is open. However, these methods would not facilitate continuous fuel atomization and could result in poor mixing and combustion efficiency.