Evaporative emission control apparatus for a combustion engine
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United States of America Patent
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Nov 4, 2003
Grant Date -
Apr 10, 2003
app pub date -
Oct 4, 2001
filing date -
Oct 4, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A fuel evaporative emission control apparatus in a carburetor which prevents diurnal evaporation to the atmosphere of fuel from a remote fuel tank through a fuel bowl or fuel chamber of a float-type carburetor. One or more shut-off valves in the carburetor are yieldably biased to a shut-off position. Only upon engine operation or user intervention will the fuel shut-off valve move to an open or on position. In this way, reliance upon the engine user is not required to reduce evaporative emissions.
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