Evaporative fuel processing device

Details Evaporative fuel processing device Evaporative fuel processing device

1996-10-11

1998-09-29

Michalsky, Gerald A.

Fluid handling

Systems

System with plural openings, one a gas vent or access opening

137202, F16K 2404

Patent

active

058134344

ABSTRACT:
An on-off valve 30 is mounted in an intermediate portion of a first evaporative fuel conduit 24 for passing an evaporative fuel within a fuel tank 21 to a canister C. The on-off valve 30 is opened when refueling. A float valve 28 is mounted at a lower end of the first evaporative fuel conduit 24 and closed by rising of the liquid level in the fuel tank 21. A two-way valve 40 and a second float valve 29 are mounted in an intermediate portion and a lower end of a second evaporative fuel conduit 25 which permits the fuel tank 21 and the canister C to be put into communication with each other during non-refueling. By putting the first and second evaporative fuel conduits 24 and 25 into communication with each other by a communication passage 27, the internal pressure in a portion 24a of the first evaporative fuel conduit 24, between the on-off valve 30 and the second float valve 28, is equalized to the internal pressure in the fuel tank 21, thereby preventing the first float valve 28 from being stuck in a closed position.

REFERENCES:
patent: 5443561 (1995-08-01), Sakata et al.
patent: 5462100 (1995-10-01), Covert et al.
patent: 5474048 (1995-12-01), Yamazaki et al.
patent: 5529086 (1996-06-01), Kasugai et al.
patent: 5584278 (1996-12-01), Satoh et al.
patent: 5647334 (1997-07-01), Miller
patent: 5669361 (1997-09-01), Weissinger et al.

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