Engine having carburetor with bridge circuit

Details Engine having carburetor with bridge circuit Engine having carburetor with bridge circuit

F - Mech Eng,Light,Heat,Weapons

02

M

F02M 7/02 (2006.01) F02M 3/12 (2006.01) F02M 11/00 (2006.01) F02D 9/02 (2006.01)

Patent

CA 2324771

An internal combustion engine including a cylinder, a crankshaft, a reciprocating piston disposed in the cylinder and operably coupled to said crankshaft, and a carburetor. The carburetor includes an airflow passage through which varying amounts of air flows; a variably positioned throttle valve located in the airflow passage, the amount of air flowing through the airflow passage being varied in response to the position of the throttle valve; a source of stored liquid fuel; a well containing liquid fuel and in independent fluid communication with the source of stored liquid fuel; a nozzle extending between the liquid fuel contained in the well and the airflow passage, the nozzle having an outlet located upstream of the throttle valve in the airflow passage, a variable amount of the liquid fuel contained in the well being conveyed through the nozzle to the airflow passage in response to the amount of air flowing through the airflow passage; and an idle circuit in independent fluid communication with both the source of stored liquid fuel and the well, the idle circuit containing liquid fuel and having at least one fuel outlet located in the airflow passage downstream of the throttle valve, a variable amount of the liquid fuel contained in the idle circuit being conveyed to the fuel outlet in response to the amount of air flowing through the airflow passage. The engine may also include a governor mechanism by which the throttle valve is positioned in response to the speed of the crankshaft.

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