Carburettors comprising a main fuel circuit and an auxiliary circuit

摘要

A carburettor for an internal combustion engine comprises a main fuel supply system for normal running, opening into a venturi in the induction passage of the carburettor, and at least one auxiliary circuit for supplying a flow of air/fuel mixture for low speed and low-load operation of the engine. The mixture control means for the circuits are carried by a distribution block arranged to be inserted and removably fixed in the part of the induction passage situated in the vicinity of the venturi.