Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1996-03-12
2000-05-16
Raevis, Robert
Measuring and testing
With fluid pressure
Dimension, shape, or size
G01M 302
Patent
active
060620668
ABSTRACT:
A method is provided for determining, prior to initiating filling of a fuel tank, the volume of the fuel tank that does not contain liquid, the method comprising the steps of: placing a vapor supply conduit in sealing relationship to the fuel tank; injecting a known volume of vapor through the vapor supply conduit into the fuel tank; measuring the amount the known volume of vapor increases the pressure of the fuel tank; and determining the volume of the tank that does not contain liquid from the known volume of vapor, and the measured amount of pressure increase. In preferred embodiments this method also determines if the fuel tank is equipped with a canister for removal of hydrocarbons from vapors displaces by fuel, and if the fuel tank has a leak by analysis of the rate at which pressure decreases after injection of the vapor. The method is also preferably used as a step in a method of automated refuelling of a vehicle.
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Christensen Del S.
Raevis Robert
Shell Oil Company
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