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Car Navigation System

  • US 20120019204A1
  • Filed: 07/20/2011
  • Published: 01/26/2012
  • Est. Priority Date: 07/22/2010
  • Status: Abandoned Application
First Claim
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1. A car navigation apparatus adaptable to an electric vehicle, comprising:

  • positioning means for positioning a present position of an electric vehicle to specify a road where the vehicle is being driven;

    a map database for storing thereinto road information which includes a sort of roads;

    a charging station database for storing thereinto a position of a charging station for the electric vehicle;

    a drive history database for accumulating a drive history;

    a battery remaining charged amount monitoring means for calculating a vehicle-drivable distance based upon a remaining charged amount of a battery mounted on the vehicle;

    display means for displaying information;

    specific crossing detecting means for judging whether or not a crossing located ahead of the road specified by said positioning means along a driving direction is a specific crossing for which a charging station should be guided; and

    charging station guiding means for guiding the charging station;

    wherein;

    in the case that said specific crossing detecting means judges that a forward crossing is the specific crossing,said charging station guiding means reads a road which is connected to said forward crossing from said map database;

    retrieves a charging station located along each of the read roads from said charging station database to calculate a distance up to each of said charging stations;

    compares the distance up to each of said charging stations with the vehicle-drivable distance calculated by said battery remaining charged amount monitoring means to judge whether or not the vehicle can reach the charging station; and

    displays a symbol for indicating whether or not the vehicle can reach the charging station on said display means based upon said judgement result in correspondence with a direction along which said charging station is present.

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