Patent ID: 8280619

Claim:
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.