What does "DFI" stand for in relation to fuel systems?

The term "DFI" stands for Direct Fuel Injection, which is a technology used in modern fuel systems to improve engine efficiency and performance. In direct fuel injection systems, fuel is injected directly into the combustion chamber at high pressure, allowing for more precise control over the fuel-air mixture and improved combustion. This results in better fuel economy, increased power output, reduced emissions, and enhanced engine responsiveness compared to traditional port fuel injection systems, where fuel is injected before the intake valves.

The advantages of direct fuel injection stem from its ability to optimize the air-fuel mixture, providing better atomization and combustion. This technology is commonly used in gasoline engines, as well as in some diesel engines, offering significant improvements in overall engine efficiency and emissions compliance.