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Fuel Injection: It Keeps Getting Better!

Federal Way auto owners know that engines need to burn fuel to operate. Fuel is pumped from your fuel tank to your Audi engine where it is squirted—or injected—into your engine’s cylinders. This is the function of the fuel injectors. There are two different ways to inject fuel into an engine. Fuel requires air to burn, so in the first method, fuel is injected into a port and allowed to mix with air and before it is drawn into the cylinders. In the second method, fuel is injected directly into the cylinders and mixes with air after it enters the Audi engine. Direct fuel injection engines burn fuel more efficiently than conventional Audi engines. Some models can deliver the power of a V8 with the economy of a V6. For example, the conventional version (a V6) delivers about 250 horsepower. The direct injection version delivers over 300 horsepower and gets about the same gas mileage. The turbocharged version delivers 350 horsepower. Why the difference in power? Direct fuel injection systems allow fuel to be squirted into the Audi engine at hundreds of times the pressure of a conventional engine. This atomizes the fuel better (breaks it down into tinier droplets), which means more of it gets burned, which translates to more power for your engine. It also results in cleaner emissions. Fuel injectors are precision devices. They have to deliver the right amount of fuel at exactly the time the Audi engine needs it. They are also engineered to inject fuel with a specific spray pattern. This spray pattern allows for maximum fuel efficiency and proper atomization. Direct injection engines...