Patent ID: 6240982
Filing Date: 2001-06-05
Classification: B67D

Abstract:
A controller for a fuel vapor recovery system, the controller comprising:an input reflecting a volume of liquid fuel transported from a storage tank to a nozzle for dispensing into a fuel tank of a car; andan output controlling a vapor recovery device that transports air/fuel vapor through the fuel line from the nozzle to the storage tank and that delivers a volume of the air/fuel vapor (V.sub.delivered) to the storage tank; this output being set so that when the temperature of the storage tank is greater than the temperature of the car's fuel tank, the volume of air/fuel vapor delivered to the storage tank (V.sub.delivered) is less than the volume of liquid gasoline (V.sub.liquid) but expands upon saturation within the storage tank to be approximately equal to the volume of liquid gasoline (V.sub.liquid);wherein the controller determines the volume of vapor to be delivered to the storage tank (V.sub.delivered) based on the fuel vapor saturation pressure at the temperature of the storage tank (p.sub.sat (T.sub.storage)).