Fuel evaporation gas transpiration prevention system

Details Fuel evaporation gas transpiration prevention system Fuel evaporation gas transpiration prevention system

1995-04-26

1997-02-11

Miller, Carl S.

Internal-combustion engines

Charge forming device

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

123198D, F02M 3704

Patent

active

056010656

ABSTRACT:
When refueling is started, a purge valve is closed, and power is supplied to a coil of a solenoid so that a constant pressure operating valve of an atmospheric escape valve is opened. When the temperature of the fuel tank rises while an engine is at a stop, fuel evaporation gas generates and the pressure within the fuel tank increases. When the differential pressure between the in-tank pressure and the atmospheric pressure increases, a first communication passage is opened, and the pressure is released to the outside. Thus, the pressure within the fuel tank can be maintained at an appropriately high pressure level while the vehicle is at a stop, and the quantity of the fuel evaporation gas generating while the vehicle is at a stop can be controlled.

REFERENCES:
patent: 4872439 (1989-10-01), Sonoda
patent: 5067468 (1991-11-01), Otowa
patent: 5193512 (1993-03-01), Steinbrenner et al.
patent: 5209210 (1993-05-01), Ikeda
patent: 5280775 (1994-01-01), Tanamura
patent: 5317909 (1994-06-01), Yamada et al.
patent: 5375529 (1994-12-01), Mukai
patent: 5445133 (1995-08-01), Nemoto

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