Internal-combustion engines – Charge forming device – Auxiliary air or gas used to inject fuel
Patent
1994-02-14
1996-02-06
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Auxiliary air or gas used to inject fuel
123676, 123DIG3, F02M 2300
Patent
active
054889332
ABSTRACT:
Exhaust pressure of an air-cooled miniature internal combustion engine is used for fuel metering and fuel delivery to the engine under higher pressure than previously obtainable from muffler back-pressure in the prior art even though the back-pressure in the exhaust system is kept to near zero for maximum engine power and cooling. This is accomplished by tapping on to the engine's exhaust stream right at and facing the exhaust port. As the engine unloads, the muffler's exhaust is further aspirated outward by a faster-moving cooling airstream hence a further reduction muffler's back-pressure causing a decrease in fuel pressurization thus a decrease in fuel flow to the engine in corresponding with a known decrease in fuel requirement at high speed as it unloads, and vice-versa. Special fuel tanks designs for this fuel system are disclosed, as well as additional means for further boosting fuel pressure.
REFERENCES:
patent: 2138301 (1938-11-01), Howie
patent: 2391380 (1945-12-01), Barker
patent: 2404833 (1946-07-01), Forster
patent: 2445715 (1948-07-01), Jennings
patent: 2463933 (1949-03-01), Adkins
patent: 2764139 (1956-09-01), Gordon
patent: 3734072 (1973-05-01), Yamda
patent: 3980067 (1976-09-01), Remington
patent: 5215068 (1993-06-01), Kato
patent: 5239965 (1993-08-01), Ninomiya
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