Evaporative emissions controls in a fuel system
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United States of America Patent
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Aug 14, 2012
Grant Date -
N/A
app pub date -
Aug 19, 2009
filing date -
Sep 30, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method, fuel system, and components for facilitating the delivery of liquid fuel from a fuel tank in fluid communication with a float bowl carburetor of an internal combustion engine, wherein evaporative emissions of the fuel from the fuel tank and float bowl carburetor are mitigated. During operation of the engine, fluid communication is permitted between the fuel tank and the carburetor, and fuel vapors at a predetermined threshold superatmospheric pressure are permitted to vent outwardly from the fuel tank. During inoperation of the engine, fluid communication is prevented between the fuel tank and the carburetor, and fuel vapors at a predetermined threshold superatmospheric pressure are permitted to vent outwardly from the fuel tank.
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