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Fuel-gauging systems

  • US 5,513,527 A
  • Filed: 05/03/1995
  • Issued: 05/07/1996
  • Est. Priority Date: 06/09/1994
  • Status: Expired due to Term
First Claim
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1. A fuel-gauging system for at least two fuel tanks comprising:

  • first and second processors associated with respective ones of the tanks;

    a fuel-gauging probe in each tank;

    connections between an output of each probe and said first and second processors such that said processors provide outputs indicative of fuel quantity in the respective tank;

    third and fourth processors;

    connections between each of said outputs of said first and second processors and said third and fourth processors such that said third and fourth processors both receive outputs from both of said first and second processors and provide nominally-identical outputs indicative of the fuel quantity in both tanks; and

    connections between inputs of said third and fourth processors and said probes without processing by the first or second processor such that, in the event of a failure of said first processor, said third processor is configured to perform in the same way as said first processor and to provide an output to said fourth processor indicative of fuel quantity in said first tank and, in the event of a failure of said second processor, said fourth processor is configured to perform in the same way as said second processor and provide an output to said third processor indicative of fuel quantity in said second tank.

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