Carburant
In short
A device used in older petrol engines to mix air and fuel in the correct amounts for combustion.
In plain words
It acts like a mixer for an engine. It takes air from the outside and sprays a fine mist of fuel into it so the engine can burn it to create power.
A simple example
When you press the accelerator in an old car, the device opens up to let more air and fuel into the engine, making the car go faster.
Why it matters
It was the main way to control engine power for decades. Most modern cars now use electronic fuel injection instead because it is more efficient.
Easy to mix up
Do not confuse it with a fuel pump, which simply moves liquid fuel from the tank to the engine.