Empty fuel level detection cross-check

Details Empty fuel level detection cross-check Empty fuel level detection cross-check

2006-08-01

2009-12-15

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

Reexamination Certificate

active

07631556

ABSTRACT:
A fuel level monitoring system for a fuel system having a primary fuel tank and a secondary fuel tank includes a fuel level sensor that is disposed within the secondary fuel tank and that generates a first signal. An empty switch is disposed within the secondary fuel tank and generates a second signal. A control module determines a condition of one of the fuel level sensor and the empty switch based on the first signal, the second signal and a plurality of signal thresholds.

REFERENCES:
patent: 5752409 (1998-05-01), Lippmann et al.
patent: 5812060 (1998-09-01), DeSpain et al.
patent: 6002328 (1999-12-01), Wallrafen
patent: 6401533 (2002-06-01), Gier et al.

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