METHOD AND SYSTEM FOR CALCULATING AND DISPLAYING TRAVEL RANGE INFORMATION
First Claim
1. A display system for a vehicle, the display system comprising:
- a display screen; and
host machine in communication with a geospatial mapping database, wherein the geospatial mapping database provides a map of road segments, the host machine being operable for;
calculating a maximum theoretical range for a predetermined criterion;
formulating a value function which summarizes the minimum cost to travel from a predetermined location to each of a set of sampled points on the map within one of the maximum theoretical range and a displayable subset of the maximum theoretical range;
calculating a solution to the value function for each point in the set of sampled points using a cost which is a function of attributes of each road segment appearing on the map;
forming a closed curve from the mathematical hull of all points in the maximum theoretical range having a value function solution less than a corresponding limit; and
displaying at least a perimeter of the closed curve via the display screen to thereby indicate the effective range of the vehicle for the predetermined criterion with respect to the predetermined location.
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Accused Products
Abstract
A display system for a vehicle includes a display screen and host machine operable for calculating a maximum theoretical range for a predetermined criterion, formulating a value function for each point in the maximum theoretical range, and calculating a solution to each of the value functions. The method also includes forming a polygon or a closed curve from the mathematical hull of all points in the maximum theoretical range having a value function solution less than corresponding limit, and displaying a perimeter of the closed curve via the display screen to indicate the effective range of the vehicle for the criterion. A vehicle includes an energy storage system, a motor/generator unit for propelling the vehicle in an electric-only (EV) mode, the display screen, and host machine, wherein the criterion is the EV mode. A method of operating the display system is also disclosed herein.
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Citations
18 Claims
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1. A display system for a vehicle, the display system comprising:
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a display screen; and host machine in communication with a geospatial mapping database, wherein the geospatial mapping database provides a map of road segments, the host machine being operable for; calculating a maximum theoretical range for a predetermined criterion; formulating a value function which summarizes the minimum cost to travel from a predetermined location to each of a set of sampled points on the map within one of the maximum theoretical range and a displayable subset of the maximum theoretical range; calculating a solution to the value function for each point in the set of sampled points using a cost which is a function of attributes of each road segment appearing on the map; forming a closed curve from the mathematical hull of all points in the maximum theoretical range having a value function solution less than a corresponding limit; and displaying at least a perimeter of the closed curve via the display screen to thereby indicate the effective range of the vehicle for the predetermined criterion with respect to the predetermined location. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicle comprising:
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an energy storage system; a motor/generator unit which is electrically connected to the energy storage system and adapted for generating torque for propelling the vehicle in an electric-only (EV) mode; a display screen; and host machine in communication with a geospatial mapping database, wherein the geospatial mapping database provides a map of road segments, the host machine being operable for; calculating a maximum theoretical range for the EV mode; formulating a value function which summarizes the minimum cost to travel from a predetermined location to each of a set of sampled points on the map within one of the maximum theoretical range and a displayable subset of the maximum theoretical range; calculating a solution to the value function for each point in the set of sampled points using a cost which is a function of the attributes of each road segment appearing on the map; forming a closed curve from the mathematical hull of all points in the maximum theoretical range having a value function solution less than a corresponding limit; and displaying at least a perimeter of the closed curve via the display screen to thereby indicate the effective EV range of the vehicle with respect to the predetermined location. - View Dependent Claims (9, 10, 11, 12)
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13. A method of operating a display system for a vehicle, the display system having a display screen and a host machine which is in communication with a geospatial mapping database that provides a map of road segments, the method comprising:
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formulating a value function which summarizes the minimum cost to travel from a predetermined location to each of a set of sampled points on the map within one of the maximum theoretical range and a displayable subset of the maximum theoretical range; calculating a solution to the value function for each point in the set of sampled points using a cost which is a function of the attributes of each road segment appearing on the map; forming a closed curve from the mathematical hull of all points in the maximum theoretical range having a value function solution less than a corresponding limit; and displaying at least a perimeter of the closed curve via the display screen to thereby indicate the effective EV range of the vehicle with respect to the predetermined location. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification