Leak detection method and associated valve and fuel system

Details Leak detection method and associated valve and fuel system Leak detection method and associated valve and fuel system

2011-03-15

2011-03-15

Dunn, Drew A (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

Reexamination Certificate

active

07908099

ABSTRACT:
Method of detecting a leak in a fuel system comprising a fuel tank and an orifice with a controlled section between the tank and the atmosphere, according to whicha) the controlled section is set to a value Alat a time T1and a pressure differential Δp1between the inside of the tank and the atmosphere is measured at least after an interval of time ΔT from T1, for a constant fuel flow out of the tank;b) the controlled section is set to a value A2at a time T2and a pressure differential Δp2between the inside of the tank and the atmosphere is measured at least after the same interval of time ΔT from T2, for the same constant fuel flow;c) a ratio of the pressure differentials Δp1and Δp2is computed and is compared to a reference pressure differential ratio ΔpLobtained with the same fuel system but comprising a calibrated leak.

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