Method for assistance of a driving maneuver, and assistance system for a driving maneuver

Patent metadata

Field	Value
Publication number	US-11260757-B2
Application number	US-201916655049-A
Country	US
Kind code	B2
Filing date	Oct 16, 2019
Priority date	Apr 20, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A method for assisting a power-intensive driving maneuver of an ego vehicle propelled by an electric motor fed from an energy-storage device includes predicting a power-intensive driving maneuver of the ego vehicle, ascertaining a peak-power profile that is needed for a complete execution of the predicted driving maneuver, and determining an available propulsive power of the ego vehicle. The method further includes ascertaining whether the available propulsive power is sufficient for the peak-power profile and, if the available propulsive power is sufficient for the peak-power profile, indicating a recommendation for execution of the predicted driving maneuver. If the available power is not sufficient for the peak-power profile, the method further includes ascertaining whether the available propulsive power is sufficient for a restricted peak-power profile that is needed for a restricted execution of the predicted driving maneuver, indicating a recommendation for restricted execution of the predicted driving maneuver if the available propulsive power is sufficient for the restricted peak-power profile, and indicating a recommendation for non-execution of the predicted driving maneuver if the available propulsive power is not sufficient for the restricted peak-power profile.

First claim

What is claimed is:

1. A method for assisting a power-intensive driving maneuver of an ego vehicle propelled by an electric motor fed from an energy-storage device, the method comprising:
predicting a power-intensive driving maneuver of the ego vehicle;
ascertaining a peak-power profile that is needed for a complete execution of the predicted driving maneuver;
determining an available propulsive power of the ego vehicle;
ascertaining whether the available propulsive power is sufficient for the peak-power profile, and
wherein if the available propulsive power is sufficient for the peak-power profile the method further comprises indicating a recommendation for execution of the predicted driving maneuver,
wherein if the available power is not sufficient for the peak-power profile, the method further comprises:
ascertaining whether the available propulsive power is sufficient for a restricted peak-power profile that is needed for a restricted execution of the predicted driving maneuver,
indicating a recommendation for restricted execution of the predicted driving maneuver if the available propulsive power is sufficient for the restricted peak-power profile, and
indicating a recommendation for non-execution of the predicted driving maneuver if the available propulsive power is not sufficient for the restricted peak-power profile.

2. The method according to claim 1 , wherein ascertaining the peak-power profile comprises:
ascertaining a duration of the predicted driving maneuver; and
ascertaining a temporal progression of the available propulsive power over a predicted period.

3. The method according to claim 1 , wherein the available propulsive power includes at least the electrical power of the energy-storage device and the power of the electric motor.

4. The method according to claim 2 , wherein the available propulsive power includes at least the electrical power of the energy-storage device and the power of the electric motor.

5. The method according to claim 3 , wherein determining an available propulsive power comprises at least one of the following:
ascertaining a state of charge of the energy-storage device,
ascertaining a thermal state of the energy-storage device,
ascertaining a power-consumption history over a certain time-interval, and
ascertaining an operating limit of the electric motor.

6. The method according to claim 4 , wherein determining an available propulsive power comprises at least one of the following:
ascertaining a state of charge of the energy-storage device,
ascertaining a thermal state of the energy-storage device,
ascertaining a power-consumption history over a certain time-interval, and
ascertaining an operating limit of the electric motor.

7. The method according to claim 1 , wherein determining the available propulsive power comprises determining the available propulsive power for the complete execution of the predicted driving maneuver and determining the available propulsive power after the complete execution of the predicted driving maneuver.

8. The method according to claim 1 , wherein indicating the recommendation for restricted execution of the predicted driving maneuver comprises indicating a forecast temporal progression of the available propulsive power.

9. An assistance system for a power-intensive driving maneuver of an ego vehicle propelled by an electric motor fed from an energy-storage device, the assistance system comprising:
a detection unit configured to predict a power-intensive driving maneuver of the ego vehicle;
a control unit coupled with the detection unit and with the energy-storage device; and
an indicating device coupled with the control unit,
wherein the control unit is configured to:
ascertain a peak-power profile that is needed for a complete execution of the predicted driving maneuver,
determine an available propulsive power of the ego vehicle, and
ascertain whether the available propulsive power is sufficient for the peak-power profile,
wherein if the available propulsive power is not sufficient for the peak-power profile, the control unit is further configured to ascertain whether the available propulsive power is sufficient for a restricted peak-power profile that is needed for a restricted execution of the predicted driving maneuver,
wherein the indicating device is configured to indicate a recommendation for execution of the predicted driving maneuver if the available propulsive power is sufficient for the peak-power profile,
wherein the indicating device is configured to indicate a recommendation for a restricted execution of the predicted driving maneuver if the available propulsive power is sufficient for the restricted peak-power profile, or to indicate a recommendation for non-execution of the predicted driving maneuver if the available propulsive power is not sufficient for the restricted peak-power profile.

10. The assistance system according to claim 9 , wherein the control unit is configured to ascertain the peak-power profile by:
ascertaining a duration of the predicted driving maneuver; and
ascertaining a temporal progression of the available propulsive power over a predicted period.

11. The assistance system according to claim 9 , wherein the available propulsive power includes at least the electrical power of the energy-storage device and the power of the electric motor.

12. The assistance system according to claim 10 , wherein the available propulsive power includes at least the electrical power of the energy-storage device and the power of the electric motor.

13. The assistance system according to claim 11 , wherein the control unit is configured to determine the available propulsive power by:
ascertaining a state of charge of the energy-storage device,
ascertaining a thermal state of the energy-storage device,
ascertaining a power-consumption history over a certain time-interval, and/or
ascertaining an operating limit of the electric motor.

14. The assistance system according to claim 12 , wherein the control unit is configured to determine the available propulsive power by:
ascertaining a state of charge of the energy-storage device,
ascertaining a thermal state of the energy-storage device,
ascertaining a power-consumption history over a certain time-interval, and/or
ascertaining an operating limit of the electric motor.

15. The assistance system according to claim 9 , wherein the control unit is configured to determine the available propulsive power by determining the available propulsive power for the complete execution of the predicted driving maneuver and the determining the available propulsive power after complete execution of the predicted driving maneuver.

16. The assistance system according to claim 10 , wherein the control unit is configured to determine the available propulsive power by determining the available propulsive power for the complete execution of the predicted driving maneuver and the determining the available propulsive power after complete execution of the predicted driving maneuver.

17. The assistance system according to claim 11 , wherein the control unit is configured to determine the available propulsive power by determining the available propulsive power for the complete execution of the predicted driving maneuver and the determining the available propulsive power after complete execution of the predicted driving maneuver.

18. The assistance system according to claim 9 , wherein the indication device is configured to indicate the recommendation for restricted execution of the predicted drivi

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Degand Christoph
• Fritzsche Pablo
• Kowallik Alexander
• Zuev Boris

Classifications

• B60W2556/10

  Historical data · CPC title

• B60L58/10

  for monitoring or controlling batteries · CPC title

• B60L2240/42

  related to electric machines · CPC title

• B60L2250/16

  by display · CPC title

• B60L58/12

  responding to state of charge [SoC] · CPC title