Diaphragm carburettor with single pump and meter block for internal combustion engines

Abstract

A diaphragm carburettor (1) for internal combustion engines, comprising: a carburettor body (2,2′) provided with a feed duct (3) of an air/fuel mixture to the engine, said duct (3) being intercepted by at least one butterfly valve (20); pumping means comprising a diaphragm pump (6) communicating on one side with the engine and on the other side with a fuel tank, said diaphragm pump (6) being driven by the pulses coming from the engine; metering means comprising a diaphragm meter (7) adapted to keep a first chamber (13) and a second chamber (12) separate, with said meter (7) interposed, said first chamber (13) being at environmental pressure, and said second chamber (12) communicating both with said diaphragm pump (6), on the side which communicates with the tank, through a line intercepted by a valve controlled by the meter (7) itself, and with said feed duct (3) of the mixture, where said pumping means and said metering means are integrally made on a single block (5) fixed directly on one side of the carburettor body (2).

Dependencies are inferred from the claim text.