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Portable navigation apparatus with refueling prompt function and method thereof

  • US 8,280,619 B2
  • Filed: 09/04/2009
  • Issued: 10/02/2012
  • Est. Priority Date: 09/04/2009
  • Status: Active Grant
First Claim
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1. A portable navigation apparatus with a refueling prompt function, comprising a display unit, an audio output unit, an input unit, a processing unit, an electronic map database, a memory and a GPS receiver for receiving satellite positioning data from a GPS satellite, the processing unit comprising a route navigation unit for generating a navigation route;

  • characterized in that;

    the memory comprising;

    a driving style table recording a plurality of road ranks and a plurality of corresponding average vehicle speeds in accordance with a driving style of a user; and

    a fuel consumption reference database storing relations between vehicle velocities and fuel consumption rates; and

    the processing unit further comprising;

    a fuel recording unit recording fuel quantity; and

    a refueling prompt unit automatically calculating forecasting fuel consumption required for traveling from a current location to a next gas station near the navigation route according to the navigation route, the driving style table and the fuel consumption reference database while the current location approaches a gas station near the navigation route, or while a new route or a re-planned route is generated, and prompting an alarm signal when the forecasting fuel consumption is greater than the fuel quantity.

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