3.0 Fuel Injection 121

Today, we're diving into the fascinating world of Fuel Injection, a crucial system in modern engines.Let's explore the specifics of Direct Fuel Injection, a technology that's revolutionizing engine performance.In direct cylinder fuel injection, air enters through the intake valve, while fuel is injected separately, preventing backfiring.However, direct cylinder fuel injection systems are prone to afterfiring and kickback during start.Conversely, continuous cylinder fuel injection systems discharge fuel into the intake port, not directly into the cylinders.Some continuous-flow systems, especially in aircraft engines, mix fuel and air in the intake port before entering the cylinder.The RSA fuel injection system includes a venturi housing, fuel metering unit, regulator, flow divider, and fuel nozzles.Here's a look at an RSA fuel injector, a key component in this advanced system.A typical venturi housing is a single piece of cast aluminum with a venturi and throttle valve.In the RSA fuel metering unit, fuel flows through a strainer, then a mixture control valve, regulating flow to the metering jets.