How Does a Carburetor Work?

[JohnnyFitz]

The working principle of a carburetor is as follows: 1. Air from the outside is filtered and then enters the carburetor, with the amount of air intake controlled by the position of the choke valve. 2. The air rushes through the venturi inside the carburetor, creating suction that draws fuel from the float chamber through the nozzle and atomizes it. 3. The atomized fuel mixes with air and is then drawn into the cylinder through the intake manifold. The amount of the air-fuel mixture is controlled by the throttle pedal, which operates the throttle inside the carburetor. 4. The amount of fuel pumped into the float chamber by the fuel pump is controlled by the float inside the float chamber. The float rises and falls with the fuel level in the float chamber. When the float chamber is filled with gasoline, the float rises and uses its needle valve to block the fuel inlet.