Carburetor with vapor purge pump
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United States of America Patent
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-
Jul 30, 2002
Grant Date -
N/A
app pub date -
Apr 7, 2000
filing date -
Apr 13, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A membrane fuel pump (A) is driven by the pulsating pressure of intake air of an engine. Fuel in the fuel tank (80) is supplied to a constant-pressure fuel chamber (30) through valve (22), and further to an intake passage through a fuel nozzle (16). A membrane purge pump (B) is also driven by the pulsating pressure of the intake air of the engine. A plurality of vapor reservoir chambers (62a-62c) are provided in a ceiling of the fuel chamber (30). The fuel vapor in the vapor reservoirs (62a-62c) is discharged from the fuel chamber (30) and back into the fuel tank (80) by the membrane purge pump (B).
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