Patent ID: 6591185
Filing Date: 2003-07-08
Classification: G01C

Abstract:
A method for determining fuel usage for a vehicle in a vehicle navigation system comprising the steps ofentering a destination in the vehicle navigation system; calculating a first route to reach the destination; identifying a fuel filling station closest to the destination; calculating approximate fuel usage required for the vehicle to reach the destination by the first route plus fuel usage to reach the fuel filling station closest to the destination after reaching the destination; comparing the calculated fuel usage required for the vehicle to reach the destination by the first route plus fuel usage to reach the fuel filling station closest to the destination after reaching the destination with a quantity of fuel remaining in the vehicle; and displaying a message that the destination and the fuel filling station closest to the destination cannot be reached when the fuel remaining is less than said calculated fuel usage required for the vehicle to reach the destination by the first route plus fuel usage to reach the fuel filling station closest to the destination after reaching the destination.