Which type of fuel system is commonly found in modern vehicles?

The electronic fuel injection (EFI) system is commonly found in modern vehicles due to its efficiency and performance benefits. EFI systems utilize electronic controls to optimize fuel delivery, allowing for precise measurement of fuel based on various engine parameters such as air intake, temperature, and engine speed. This results in better fuel atomization and a more complete combustion process, which enhances engine performance, reduces emissions, and improves fuel economy.

EFI systems also offer advanced features such as closed-loop operation, where the system adjusts fuel delivery based on feedback from oxygen sensors, ensuring the optimal air-fuel ratio in real-time. This adaptability significantly contributes to the overall efficiency and reliability of modern engines, making EFI the preferred choice in contemporary automotive design.

Other fuel systems like carbureted systems, mechanical fuel injection, and diesel fuel systems are still in use but are less common in today's passenger vehicles. Carbureted systems are largely considered outdated due to their inefficiency and the lack of precision compared to EFI. Mechanical fuel injection systems are typically found in older diesel engines and some high-performance vehicles but lack the versatility and control of electronic systems. Diesel fuel systems are specifically designed for diesel engines and are not applicable to the majority of gasoline-fueled modern vehicles.