Range marker for a navigation system

摘要

Devices, methods and systems are disclosed herein to describe a range marker for a navigation system. The range marker may delineate a bounded area within a navigation map that a vehicle may travel based on the amount of fuel remaining. As the fuel continues to decrease during operation of the vehicle, the range marker may become smaller and smaller indicating a shrinking range since the fuel remaining decreases, thereby allowing the driver to easily identify which gas stations may be within a range of the vehicle (based on a current vehicle fuel level) and which gas stations might not be within the range of the vehicle.

主权项

1. A navigation unit for a vehicle, the navigation unit configured to provide turn-by-turn directions, the navigation unit comprising:
a processor configured to:
receive or determine a current location of the vehicle and vehicle energy information indicating at least one of remaining fuel or electrical energy for the vehicle,determine a distance-to-empty value based on the vehicle energy information, andgenerate range marker data based on the distance-to-empty value, the range maker data representing a closed boundary for defining a closed area of a navigation map where the vehicle can travel from the current location of the vehicle using the remaining fuel or electrical energy; a memory coupled to the processor, the memory configured to retrieve a location of an energy station within the closed boundary; and a display configured to receive the range marker data generated by the processor and the location of the energy station, the display further configured to:
display the closed boundary, the closed area of the navigation map and the energy station within the closed boundary, anditeratively update the display of the closed boundary based on an updated current location of the vehicle and an updated distance-to-empty value received from the processor.