Patent ID: 6499726
Filing Date: 2002-12-31
Classification: F02D,F02M

Abstract:
An internal combustion engine comprising:a cylinder, a crankshaft, a reciprocating piston disposed in said cylinder, said piston operably coupled to said crankshaft; and a carburetor in fluid communication with said cylinder, said carburetor having an airflow passage through which varying amounts of air flows, a variably positioned throttle valve located in said airflow passage, the amount of air flowing through said airflow passage being varied in response to the position of said throttle valve, a source of stored liquid fuel, a well containing liquid fuel and in independent fluid communication with said source of stored liquid fuel, a nozzle extending between the liquid fuel contained in said well and said airflow passage, said nozzle having an outlet located upstream of said throttle valve in said airflow passage, a variable amount of the liquid fuel contained in said well being conveyed through said nozzle to said airflow passage in response to the amount of air flowing through said airflow passage, and an idle circuit in independent fluid communication with both said source of stored liquid fuel and said well, said idle circuit containing liquid fuel and having at least one idle fuel outlet located in said airflow passage downstream of said throttle valve, a variable amount of the liquid fuel contained in said idle circuit being conveyed to said at least one idle fuel outlet in response to the amount of air flowing through said airflow passage, wherein liquid fuel is conveyed to said airflow passage during engine operation solely in response to air being flowed over at least one of said nozzle outlet and said idle fuel outlet.