What does the abbreviation EFI stand for?

The abbreviation EFI stands for Electronic Fuel Injection. This system is used in automobiles to deliver fuel directly to the engine's combustion chamber in a precisely controlled manner, improving fuel efficiency, performance, and reducing emissions compared to older carbureted systems. EFI uses sensors to determine the optimal amount of fuel needed based on various operating conditions, such as engine temperature, air intake, and throttle position. This technology plays a critical role in modern engines, ensuring they operate smoothly and efficiently while meeting environmental regulations.

In comparison, the other options relate to different concepts or technologies that do not accurately represent the system responsible for electronically managing fuel delivery in vehicles.