Method for estimating the range of a motor vehicle

• US 8,594,918 B2
• Filed: 10/29/2010
• Issued: 11/26/2013
• Est. Priority Date: 11/11/2009
• Status: Active Grant

• Current Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Original Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Inventors: Meyer-Ebeling, Joerg, Roth, Martin
• Primary Examiner(s): Algahaim, Helal A
• Application Number:
  US12/915,137
• Publication Number:
  US 20110112710A1
• Time in Patent Office: 1,124 Days
• Field of Search: 701/22, 701/123, 701/414, 701/532, 701/533
• US Class Current: 701/123
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 2240/622 by satellite navigation
• CPC Class Codes: B60L 2240/64 Road conditions
• CPC Class Codes: B60L 2240/642 Slope of road
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2250/18 by enquiring driving style
• CPC Class Codes: B60L 2260/52 drive range estimation, e.g. of estimation of available travel distance
• CPC Class Codes: B60L 2260/54 Energy consumption estimation
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2530/209 Fuel quantity remaining in tank
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 40/12 related to parameters of the vehicle itself , e.g. tyre models
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: B60W 50/082 Selecting or switching between different modes of propelling
• CPC Class Codes: G01C 21/3469 Fuel consumption; Energy use; Emission aspects
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A method is provided for estimating the range of a motor vehicle based on a quantity of energy carried in the motor vehicle. The method enables a driver to limit a maximum permissible velocity and/or a maximum permissible acceleration and/or a maximum performance level for a comfort system. The method also detects the route profiles surrounding the motor vehicle, in particular an altitude profile and/or a road category. A computer device calculates and displays a still possible range at least on the basis of the limitation which has been carried out, the detected route profiles and the still available quantity of energy.

Claims

1. A method for estimating a range of a motor vehicle, comprising:

detecting a quantity of energy carried in the motor vehicle;

identifying route profiles for each of a plurality of routes surrounding the motor vehicle;

selecting a maximum permissible amount for at least one driver-controllable vehicle performance characteristic that affects an energy consumption rate;

calculating a still possible range for each of the plurality of routes at least on the basis of the detected quantity of energy carried in the motor vehicle, the identified route profiles surrounding the motor vehicle and the selected maximum permissible amount for at least one driver-controllable vehicle performance characteristic;

displaying in the motor vehicle the calculated still possible range on each of the plurality of routes.

2. The method of claim 1, wherein the step of identifying route profiles surrounding the motor vehicle comprises identifying at least one of an altitude profile and road categories.

3. The method of claim 1, wherein the step of selecting a maximum permissible amount for at least one driver-controllable vehicle performance characteristic that affects an energy consumption rate comprises selecting at least one of a maximum velocity, a maximum acceleration, a maximum permissible torque and a maximum performance level for a comfort system.

4. The method of claim 3, wherein the step of calculating a still possible range and the step of displaying the calculated still possible range are carried out using a computer device in the motor vehicle.

5. The method of claim 1, wherein the step of selecting a maximum permissible amount for at least one driver-controllable vehicle performance characteristic comprises selecting a desired driving style from gentle, normal and sporty.

6. The method of claim 1, further comprising detecting weather conditions in proximity to the vehicle and wherein the step of calculating a still possible range is based partly on the weather conditions.

7. The method of claim 6, wherein the step of detecting weather conditions comprises selecting at least one of external temperature, precipitation and wind.

8. The method of claim 1, further comprising detecting a state of an energy accumulator in the motor vehicle and wherein the step of calculating a still possible range is based partly on the state of the energy accumulator.

9. The method of claim 1, further comprising detecting an operating state of at least one vehicle comfort system and wherein the step of calculating a still possible range is based partly on the detected operating state of the at least one vehicle comfort system.

10. The method of claim 9, wherein the step of detecting an operating state of at least one vehicle comfort system comprises detecting an operating state of at least one of a radio, an air-conditioning system, a heating system and a lighting system.

11. The method of claim 1, further comprising detecting at least one characteristic of a state of the motor vehicle that affects energy efficiency, and wherein the step of calculating a still possible range is based partly on the detected characteristic of the state of the motor vehicle that affects energy efficiency.

12. The method of claim 11, wherein the step of detecting at least one characteristic of a state of the motor vehicle that affects energy efficiency comprises detecting at least one of:

a wear state of tires on the motor vehicle, aerodynamic characteristic values, temperature of an engine of the motor vehicle, temperature of a transmission of the motor vehicle, conformance with a maintenance schedule for the motor vehicle, a load carried by the motor vehicle and a presence or absence of roof extensions.

13. The method of claim 1, further comprising indicating visually, acoustically or haptically whether the maximum permissible amount of the vehicle performance characteristic selected by the driver has been reached.

14. The method of claim 1, wherein the step of displaying the calculated still possible range comprises detecting the still possible range on a navigation device of the vehicle.

18. The method of claim 1, wherein the step of displaying in the motor vehicle the calculated still possible range on each of the plurality of routes comprises simultaneously displaying on a GPS map the possible ranges on each of the plurality of routes to define an outer boundary of possible ranges.

19. The method of claim 1, further comprising inputting a destination into a GPS, and displaying the destination simultaneously with the step of displaying the calculated still possible range on each of the plurality of routes.

20. The method of claim 19, further comprising calculating a still possible range for each of a second plurality of routes from the destination, if the destination can be reached with the detected quantity of energy carried in the motor vehicle, and displaying in the motor vehicle the calculated still possible range on each of the second plurality of routes from the destination.

21. The method of claim 19, further comprising inputting a request for a fastest route to the destination and displaying in the motor vehicle one of the plurality of routes that will achieve the fastest time to the destination.

22. The method of claim 19, further comprising inputting a request for a most fuel efficient route to the destination and displaying in the motor vehicle one of the plurality of routes that will use a least amount of energy to reach the destination.

23. The method of claim 5, further comprising changing the selected driving style, recalculating the still possible range for each of the plurality of routes based on the changed selected driving style and presenting a new display in the motor vehicle of the recalculated still possible range on each of the plurality of routes.

15. A motor vehicle having a device for estimating range, comprising

a detection device for detecting a quantity of energy carried in a motor vehicle;

an input device operative to permit a driver to input at least one limitation on a driving performance;

a navigation device that detects route profiles for a plurality of routes in proximity to the motor vehicle; and

a computer device that calculates a still possible range on each of the plurality of routes at least on the basis of the limitation on driving performance that has been inputted by the driver, the detected road profiles and the quantity of energy carried in the motor vehicle.

16. The motor vehicle of claim 15, wherein the motor vehicle is an electric vehicle, a motor vehicle driven by internal combustion engine or a hybrid vehicle.

17. The motor vehicle of claim 15, wherein the navigation device is configured to display the still possible range on each of the plurality of routes calculated by the computer device.