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Fuel consumption measurement system

  • US 5,205,161 A
  • Filed: 05/10/1991
  • Issued: 04/27/1993
  • Est. Priority Date: 12/14/1990
  • Status: Expired due to Fees
First Claim
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1. A frequency based fuel consumption measuring system arranged for use with an engine or combustion device having a fuel supply means in which a portion of the fuel fed thereto is unburned and including a return line from the engine arranged to return fuel back to the fuel supply means, said compensated measuring system comprising volumetric measuring means having means for connection in the fuel supply means of an engine and arranged to measure fuel supplied to the engine, temperature sensing means associated with said fuel supply measured means, volumetric measuring means having means for connection in the return line of an engine and arranged to measure return flow in the return line, temperature sensing means associated with said return fuel measuring means, each of said fuel flow measuring means and temperature sensing means having an output, means responsive to said two fuel flow measuring means outputs and at least one of said temperature sensing means outputs compensating the fuel flow measurements for variations in the temperature of the fuel and means determining an output which comprises the differential of the compensated measurements, adjustable means modifying the differential output frequency for various engine calibrations, and means responsive to the output of the modified fuel flow differential producing a single pulse output interface signal related to fuel flow rate.

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