Carburator – Auxiliary System of Rapid Acceleration

This animation tried to be as realistic to demonstrate the role of the auxiliary system of rapid acceleration in the carburetor.

The function of this system is to immediately increase the engine power when accelerating rapidly. An extra amount of fuel is injected directly into the primary air flow, enriching the mixture and extracting an extra engine power.

System animation help quickly carburetor throttle

The rotation of the throttle shaft, which occurs when the throttle is actuated, moves a system of levers that drives the injector piston of the auxiliary acceleration system of the carburetor. The piston, as it moves through the cylinder, pushes the fuel into the throttle channel of the throttle. Along the way, the fuel opens a valve to pass, flows into the carburetor body and is injected into the main stream of air, enriching the mixture.

When the engine is decelerated and the accelerator throttle lever returns to its starting position, the piston no longer presses on the fuel, which stops acting on the throttle valve that closes, restricting fuel return and preventing entry Of air in the system. At the same time, the duct valve connecting the injector piston cylinder to the carburetor tub opens, allowing the cylinder to fill with the aspirated fuel from the tub.


– Changing the color arrow represents the ratio of the air-fuel mixture;

– Cooler colors represent poorer mixtures

– More quantes colors represent richer mixtures

– The size of the arrows represents the volume of air or mixture admitted per unit time (flow rate)

Eduardo Stefanelli

Engenheiro por profissão, professor por vocação