초록 ▼

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 m

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.

대표청구항 ▼

For use in combination with an internal combustion engine having an exhaust port, an exhaust conduit wherein resistance to the flow of exhaust gas creates back-pressure to said engine, and an air-intake conduit containing a fuel discharge nozzle, a fuel supply and metering system relying upon exhaus

For use in combination with an internal combustion engine having an exhaust port, an exhaust conduit wherein resistance to the flow of exhaust gas creates back-pressure to said engine, and an air-intake conduit containing a fuel discharge nozzle, a fuel supply and metering system relying upon exhaust pressure obtained from said exhaust port, comprising: an exhaust pressure tapping means placed in proximity to and facing toward said exhaust port, thereby resulting in higher exhaust pressure obtainable therefrom than the exhaust back-pressure existing at distances further away from said exhaust port within said exhaust conduit, and, a fuel tank containing a liquid fuel, said fuel tank includes a pressurization/venting tubing line in fluid connection with said exhaust pressure tapping means and a fuel outlet line tubing in fluid connection with said fuel discharge nozzle of the engine, whereby said liquid fuel is fed to said engine under a pressure that varies generally in proportion with variation in rate of exhaust gas production of said engine.