| 摘要 |
PROBLEM TO BE SOLVED: To provide a car navigation device for improving customer satisfaction of a user sticking to the quality of fuel to be fed. SOLUTION: When the residue of fuel is predicted to become a predetermined amount Qr or less on a motorway, a service station treating fuel of a specific oil company previously registered by the user is retrieved before a vehicle approaches the motorway. Therefore, the user is urged to feed oil so that the vehicle does not cause fuel shortages on the motorway and so that the fuel of the oil company which the user uses by choice can be fed. Thus, the customer satisfaction of the user sticking to the quality of fuel to be fed can be improved. COPYRIGHT: (C)2009,JPO&INPIT |
