Acceleration circuit used in Solex Carburetor

ACCELERATION CIRCUIT :

For immediate pick-up of speed, we have to accelerate. During acceleration and sudden throttle opening, The engine requires some extra fuel supply. The extra fuel is supplied through a separate fuel passage by the accelerator pump.

Acceleration circuit consists of a pump chamber connected to float chamber. There is an accelerator pump in this circuit. It is a diaphragm type pump. The diaphragm is actuated by lever. The diaphragm is held in position by a compression spring.

When the lever is pressed, the diaphragm moves against the tension spring and forces the fuel through the acceleration jet.

The fuel is sprayed into Venturi through curved injector tube. When the pedal is released, the diaphragm will move back and suck the fuel from float chamber through pump inlet valve. Thus, the pump is ready for the next charge.

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