Navigation system and method of using vehicle state information for route modeling

摘要

A vehicle includes a powertrain controller, an energy storage system (ESS), a traction motor, an electrical device such as an HVAC system and/or auxiliary system, and a navigation system. The navigation system generates a recommended eco-route or other travel route. The navigation system receives vehicle state information including a current powertrain state from the controller and a power load value from the device(s), including a state of charge of the ESS. The vehicle state information is used to select between a charge-depleting and a charge-sustaining costing model. The route is generated using the selected model, and then displayed. The navigation system includes a host machine which selects the model and generates the route, and a display screen for displaying the route. A method for generating the route includes receiving the current powertrain state and power load values, and using the state information to select between the charge-depleting and charge-sustaining models.

主权项

1. A vehicle comprising:
a powertrain controller; an energy storage system (ESS) having a maximum state of charge (SOC); a traction motor that is energized via the ESS, and that is configured to propel the vehicle; at least one electrical device, including a heating, ventilation, and air conditioning (HVAC) system and an auxiliary system; and a navigation system in communication with a geospatial database, and configured to generate a recommended travel route for a trip between a route origin and a route destination using mapping data from the geospatial database, wherein the navigation system includes a display screen; wherein the navigation system is configured to:
receive, as vehicle state information, a current powertrain state from the powertrain controller and a current power load from the at least one electrical device, wherein the current powertrain state includes a state of charge of the ESS;determine an expected power load for a duration of the trip using the current power load;estimate a remaining charge depleting range of the vehicle using the vehicle state information and the expected power load;estimate a minimum route distance for the trip using the route origin, the route destination, the expected power load, and the estimated remaining charge depleting range;select, using the vehicle state information, a charge-depleting costing model when the minimum route distance is less than the estimated remaining charge depleting range, wherein the charge-depleting costing model uses the traction motor in a manner that depletes the ESS substantially below a calibrated threshold state of charge of at least 15% of the maximum state of charge of the ESS;select, using the vehicle state information, a charge-sustaining costing model that uses the traction motor in a manner that maintains the state of charge of the ESS above the calibrated threshold state of charge when the minimum route distance is greater than the estimated remaining charge depleting range;generate the recommended travel route via the navigation system using the selected charge-deleting or charge-sustaining costing model; anddisplay the recommended travel route via the display screen.