Method and system for calculating an energy efficient route

摘要

A method and system for calculating an energy efficient route is disclosed. A route calculation application calculates one or more routes from an origin to a destination. For each of the routes, the route calculation application uses segment cost data associated with each segment in the route. The segment cost is calculated by adjusting an energy consumption value by subtracting a bias term for each segment with known slope data. The bias term causes segment costs associated with segments having a slope that can be traveled with typical efficiency, a zero slope, and an unknown slope to be substantially the same. The bias term also causes the segment cost associated with a segment with a slope that can be traveled efficiently to be less than the segment cost associated with a segment with unknown slope, and the segment cost associated with a segment with a slope that causes inefficient travel to be greater than the segment cost associated with a segment with unknown slope.

主权项

1. A method comprising:
receiving data indicative of a destination and an origin; and displaying, by a navigation system, an energy efficient route from the origin to the destination, wherein the energy efficient route is generated using a plurality of road segment costs for a plurality of road segments; and wherein one or more road segments of the plurality of road segments has an unknown slope; wherein the plurality of road segment costs are calculated by subtracting a bias amount from an energy consumption value of a road segment, wherein the bias amount is equal to the road segment's altitude difference multiplied by an energy factor; wherein the segment cost of the one or more road segments with the unknown slope is equal to the energy consumption value of the one or more road segments.