Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Reexamination Certificate
2011-08-30
2011-08-30
Vo, Hieu T (Department: 3747)
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
Reexamination Certificate
active
08006674
ABSTRACT:
A valve is disposed between a fuel tank and an engine intake manifold in a small engine fuel system equipped to recapture running loss evaporative emissions. The valve includes a resilient diaphragm that blocks the flow path When vapor pressure in the fuel tank reaches a predetermined level, the diaphragm opens and allows the vacuum forces in the manifold to purge the vapors in the fuel tank by drawing the vapors into the manifold to be burned in the engine. The diaphragm isolates the fuel tank vapor dome from the vacuum pressure generated in the manifold, thereby preventing the engine from being starved of fuel. The valve may be integrated with a liquid discriminating valve to form a valve assembly.
REFERENCES:
patent: 6354280 (2002-03-01), Itakura et al.
patent: 6874484 (2005-04-01), Benjey
patent: 6951209 (2005-10-01), Yanase et al.
patent: 7325577 (2008-02-01), Devall
Mills Vaughn K.
Spink Kenneth M.
Castro Arnold
Eaton Corporation
Hinman Kevin M.
Shih Anna M.
Vo Hieu T
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