Three position fuel line check valve for relief of diurnal...

Details Three position fuel line check valve for relief of diurnal... Three position fuel line check valve for relief of diurnal...

2007-07-24

2007-07-24

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel flow regulation between the pump and the charge-forming...

C123S510000, C123S495000, C123S467000, C137S517000

Reexamination Certificate

active

11263013

ABSTRACT:
Prior art fuel line check valves remain closed after engine off and cool down. Diurnal heating and the resultant pressure increase in the fuel line causes fuel vapor emissions through small openings in the fuel line (e.g., at the injector tips). The invention provides a check valve for a vehicle fuel line which opens in response to engine cooling and remains open while the engine is off to relieve subsequent increasing pressure in the fuel line due to diurnal heating thereof.

REFERENCES:
patent: 3664368 (1972-05-01), Sweeney
patent: 5477829 (1995-12-01), Hassinger et al.
patent: 6067963 (2000-05-01), Oi et al.
patent: 6668802 (2003-12-01), Kiowsky et al.
patent: 6988488 (2006-01-01), Pursifull et al.
patent: 7066152 (2006-06-01), Stroia et al.

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