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

Abstract

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

Dependencies are inferred from the claim text.