Patent ID: 8239127
Filing Date: 2012-08-07
Classification: G01C

Abstract:
1. A car navigation system for predicting a fuel consumption rate along a found route using the fuel consumption rate information under a predetermined running condition, the system comprising: a test cycle characteristic value storage means for storing a test cycle characteristic value as a theoretical value of energy consumption of selected one of a fuel and an electric energy of an automotive vehicle under the predetermined running condition; a basic vehicle specification setting means for accepting input of basic vehicle specifications including at least a weight and the fuel consumption rate of the vehicle involved under the predetermined running condition; a vehicle energy consumption characteristic calculation means for estimating a vehicle energy consumption parameter in selected one of an engine and a motor of the vehicle, using the test cycle characteristic value and the basic vehicle specifications; an energy consumption prediction means for predicting the energy consumption in each road link using the basic vehicle specifications, the vehicle energy consumption parameter, road link information; and a route search means for seeking a route using, as a link cost, the predicted energy consumption for each road link calculated.