What does DFI stand for in fuel injection systems?

The term DFI stands for Direct Fuel Injection. This technology refers to a system where fuel is injected directly into the combustion chamber of an engine, rather than being mixed with air in the intake manifold before entering the chamber. This method of fuel delivery improves fuel efficiency, enhances performance, and reduces emissions by promoting a more complete combustion process.

Direct Fuel Injection allows for more precise control over the fuel-air mixture and enables higher compression ratios, which can lead to increased power output and improved thermal efficiency. This innovation is significant in modern automotive engineering, contributing to advancements in engine technology and environmental standards.

Other options, while they might seem plausible, do not correctly define DFI in the context of fuel injection systems, as they refer to different concepts or are not widely recognized in the industry.