Since the 1980s, fuel injectors have almost completely replaced carburetors. The main difference between fuel injection and carburetors is that fuel injection atomizes the fuel by forcibly pumping it through a small nozzle at high pressure, while a carburetor depends on low pressure created by intake air flowing rapidly through it to add the fuel to the airstream.
There are many advantages to the use of fuel injectors, among them are:
- Easier and more dependable engine starting.
- More dependable operation at very hot or cold temperatures.
- Longer periods without maintenance.
- Better fuel efficiency.
Fuel injection systems can react quickly to changing inputs such as sudden throttle movements, and control how much fuel is injected to match the engine’s dynamic needs across a broad range of operating conditions such as ambient air temperature, engine load, fuel octane level, engine temperature, and atmospheric pressure.