Method for determining empty volume of fuel tank

Details Method for determining empty volume of fuel tank Method for determining empty volume of fuel tank

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.

REFERENCES:
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patent: 3580414 (1971-05-01), Ginsburgh et al.
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patent: 4971121 (1990-11-01), Guertin
patent: 5001924 (1991-03-01), Walter et al.
patent: 5121777 (1992-06-01), Leininger et al.
patent: 5131441 (1992-07-01), Simpson et al.
patent: 5245870 (1993-09-01), Hartel et al.
patent: 5355863 (1994-10-01), Yamanaka et al.

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