Kütusepritsimine

Kütusepritsimine, also known as fuel injection, is a fuel delivery system for internal combustion engines. It atomizes fuel and injects it directly into the engine's intake manifold or combustion chamber. This system replaced carburetors in most modern gasoline engines due to its superior efficiency and performance.

The primary advantage of fuel injection is precise fuel control. Sensors monitor engine conditions like throttle position, engine speed, temperature, and oxygen levels in the exhaust. An engine control unit (ECU) then calculates the optimal amount of fuel needed for each cylinder and injects it at the precise moment. This leads to more complete combustion, resulting in better fuel economy, lower emissions, and improved power output compared to carburetors.

There are several types of fuel injection systems. Port fuel injection (PFI) injects fuel into the intake manifold runners, just before the intake valve. Direct injection (DI) injects fuel directly into the combustion chamber. Other variations include multi-point injection (MPI), where each cylinder has its own injector, and single-point injection (SPI), which uses a single injector for the entire engine.

The transition from carburetors to fuel injection began in the late 20th century, with most manufacturers adopting the technology by the early 2000s. This technological advancement has been crucial in meeting increasingly stringent emissions regulations and improving the overall performance and efficiency of vehicles.