Car Navigation System
First Claim
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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Accused Products
Abstract
If a route has not yet been set in a car navigation apparatus, and when a vehicle approaches a specific crossing or a charging station located ahead of a current-driving road, or when remaining charge of a battery becomes less, the navigation apparatus retrieves and displays information about charging stations of the respective branching directions. When the vehicle approaches a specific crossing, the navigation apparatus guides information for indicating whether or not a charging station is present, a distance, and whether or not the vehicle can reach the charging station with respect to each of directions branched from the specific crossing. Also, when a charging station is located ahead of the road, the navigation apparatus retrieves charging stations of the respective branching destinations at a specific crossing located in front of the road, and judges whether or not the vehicle can be driven up to the respective retrieved charging stations.
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Citations
5 Claims
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1. A car navigation apparatus adaptable to an electric vehicle, comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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Specification