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Fuel economy display for vehicles

  • US 5,693,876 A
  • Filed: 05/31/1996
  • Issued: 12/02/1997
  • Est. Priority Date: 05/31/1996
  • Status: Expired due to Fees
First Claim
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1. An improved fuel economy device for a vehicle comprising:

  • a speed measuring device operable to measure speed of the vehicle;

    a fuel rate measuring device operable to measure fuel rate;

    a control unit in communication with the speed measuring device and the fuel rate measuring device, the control unit operable to receive the speed and fuel rate, and operable to compute and repetitively update a filtered rate of change of instantaneous fuel economy using at least a first predefined filter coefficient; and

    a display device in communication with the control unit, the display device operable to graphically display the filtered rate of change of instantaneous fuel economy;

    wherein the display device includes a bar graph display with a first and second region and a reference point between the first and second region, the bar graph display being operable to display a portion of the first region to reflect a positive change in the filtered rate of change in instantaneous fuel economy, and being operable to display a portion of the second region to reflect a negative filtered rate of change in the instantaneous fuel economy.

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