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1. WO2020193695 - A METHOD FOR CONTROLLING A VEHICLE

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. A method for controlling a vehicle (1) comprising a drivetrain comprising at least one drive device (2) adapted to generate mechanical power, the method comprising

controlling the vehicle to perform a mission comprising a plurality of stages (MS1-MS12),

collecting operational data relevant to the operation of the drivetrain, wherein the operational data indicate a de-rate of a component of the drivetrain, a fault of a component of the drivetrain, and/or an environmental condition which influences the drivetrain operation, and

determining an expected mission stage (MS1-MS12),

determining, in dependence on the operational data, the propulsive capacity (CA1-CA3) in at least two different operational areas (A1-A3) of the drive device (2),

mapping the operational area propulsive capacities (CA1-CA3) to the expected mission stage (MS1-MS12), and controlling the vehicle (1) in dependence on said mapping.

2. A method according to claim 1 , characterized in that the operational data, relevant to the operation of the drivetrain, is collected during the mission.

3. A method according to any one of the preceding claims, characterized in that mapping the operational area propulsive capacities (CA1-CA3) to the expected mission stage (MS1-MS12) comprises comparing the operational area propulsive capacities to respective capacity threshold values (Ta-Tak) of the operational area propulsive capacities in the expected mission stage.

4. A method according to any one of the preceding claims, characterized by selecting a plurality of capacity threshold values (Ta-Tak), each capacity threshold value providing a lower limit of an operational area propulsive capacity (CA1-CA3) in a mission stage (MS1-MS12).

5. A method according to claim 4, characterized in that mapping the operational area propulsive capacities (CA1-CA3) to the expected mission stage (MS1-MS12)

comprises comparing an operational area propulsive capacity to the capacity threshold value (Ta-Tak) of the operational area propulsive capacity (CA1-CA3) and the expected mission stage (MS1-MS12).

6. A method according to any one of the preceding claims, characterized in that the operational areas (A1-A3) are defined by respective different intervals of a rotational speed of the drive device.

7. A method according to any one of the preceding claims, characterized in that the step of determining, in dependence on the operational data, the propulsive capacity (CA1-CA3) in at least two different operational areas (A1-A3) of the drive device, comprises determining the propulsive capacity (CA1-CA3) in no more than ten, preferably no more than five, more preferably no more than three, operational areas (A1-A3) of the drive device.

8. A method according to any one of the preceding claims, characterized in that the step of determining, in dependence on the operational data, the propulsive capacity (CA1-CA3) in at least two different operational areas (A1-A3) of the drive device, comprises determining no more than ten, preferably no more than five, more preferably no more than three, propulsive capacities.

9. A method according to any one of the preceding claims, characterized in that the step of determining, in dependence on the operational data, the propulsive capacity (CA1-CA3) in at least two different operational areas (A1-A3) of the drive device, comprises determining for each of the operational areas, a single respective propulsive capacity.

10. A method according to any one of the preceding claims, characterized in that determining the operational area propulsive capacities (CA1-CA3) comprises sampling a propulsive capacity at one or more sampling points (MP1-MP8) within an operational spectrum of the drive device.

11. A method according to claim 10, characterized by calculating a value of the

respective operational area propulsive capacity (CA1-CA3) in dependence on one or more of the sampled propulsive capacities.

12. A method according to any one of the preceding claims, characterized in that the collected operational data indicate a de-rate triggered by a software, wherein the step of determining the propulsive capacity in the at least two different operational areas of the drive device, comprises running the de-rate triggering software.

13. A method according to any one of the preceding claims, characterized by

performing one or more simulations of operations of the drivetrain with one or more simulated de-rates of one or more components of the drivetrain, one or more simulated faults of one or more components of the drivetrain, and/or one or more simulated environmental conditions which influence the drivetrain operation, the method further comprising determining, for each of the simulated drivetrain operations, respective virtual propulsive capacities in the at least two different operational areas of the drive device, wherein determining, in dependence on the operational data, the propulsive capacity (CA1-CA3) in at least two different operational areas (A1-A3) of the drive device comprises selecting the propulsive capacities from said virtual propulsive capacities.

14. A method according to claim 13, characterized by identifying from said simulated de-rates, simulated faults, and/or simulated environmental conditions, a simulated de-rate, a simulated fault, and/or a simulated environmental condition

corresponding to the de-rate, the fault, and/or the environmental condition indicated by the collected operational data, wherein determining, in dependence on the operational data, the propulsive capacity (CA1-CA3) in at least two different operational areas (A1-A3) of the drive device comprises selecting the virtual propulsive capacities of the identified simulated de-rate, the identified simulated fault, and/or the identified simulated environmental condition.

15. A method according to any one of claims 13-14, characterized in that the drivetrain operations simulations are done before controlling the vehicle to perform the mission.

16. A method according to any one of the preceding claims, characterized in that controlling the vehicle (1) in dependence on said mapping comprises defining a speed profile for the vehicle in dependence on said mapping.

17. A method according to any one of the preceding claims, characterized in that controlling the vehicle (1) in dependence on said mapping comprises moving the vehicle to a specified position ahead, and then stopping the vehicle.

18. A method according to any one of the preceding claims, characterized in that the propulsive capacity operational areas (A1-A3) comprise a first area (A1) within a drive device rotational speed interval including rotational speeds at take-off maneuvers of the vehicle (1).

19. A method according to claim 18, characterized in that the vehicle is a load carrying vehicle, and the mission includes a loading procedure, the method comprising selecting a first capacity threshold value (Ta) as a lower limit of the first area propulsive capacity (CA1) in the expected mission stage (MS1), which first capacity threshold value is at least partly based on an expected loading procedure of the vehicle in the expected mission stage (MS1), and, if the propulsive capacity (CA1) in the first area (A1) is below the first capacity threshold value (Ta), controlling the vehicle (1) in dependence on said mapping comprises avoiding the loading procedure.

20. A method according to any one of the preceding claims, characterized in that the propulsive capacity operational areas (A1-A3) comprise a second area (A2) within a drive device rotational speed interval including a maximum torque of the drive device (2).

21. A method according to claim 20, characterized by selecting a third capacity

threshold value (Te, Tk, Tq) as a lower limit of the second area propulsive capacity (CA2) in the expected mission stage (MS2, MS4, MS6), which third capacity threshold value is at least partly based on an expected vehicle load in the expected mission stage (MS2, MS4, MS6), and/or an uphill road gradient of the expected mission stage, and, if the propulsive capacity (CA2) in the second area (A2) is below the third capacity threshold value, controlling the vehicle (1) in dependence on said mapping comprises reducing the vehicle speed in the expected mission stage (MS2, MS4, MS6).

22. A method according to any one of the preceding claims, characterized in that the propulsive capacity operational areas (A1-A3) comprise a third area (A3) within a drive device rotational speed interval including a maximum power of the drive device (2).

23. A method according to any one of the preceding claims, characterized in that the propulsive capacity operational areas (A1-A3) comprise an area with engine braking of the drive device (2).

24. A method according to claim 23, characterized in that the propulsive capacity of the engine braking operational area is an engine braking capacity of the vehicle, wherein the method comprises selecting a fourth capacity threshold value as a lower limit of the engine braking capacity in the expected mission stage (MS3, MS8, MS10, MS12), which fourth capacity threshold value is at least partly based on an expected vehicle load in the expected mission stage, and/or a downhill road gradient of the expected mission stage, and the method comprising controlling the vehicle in dependence on the engine braking capacity and the fourth capacity threshold value.

25. A method of controlling a plurality of vehicles, characterized by controlling a first of the vehicles according to any one of the preceding claims, controlling the remaining vehicles to perform said mission, and controlling at least one of the remaining vehicles in dependence on said operational area propulsive capacities (CA1-CA3) and/or said mapping of the first vehicle.

26. A computer program comprising program code means for performing the steps of any one of claims 1-25 when said program is run on a computer, or a group of computers.

27. A computer readable medium carrying a computer program comprising program code means for performing the steps of any one of claims 1-25 when said program product is run on a computer, or a group of computers.

28. A control unit, or a group of control units (CUV, CUC), configured to perform the steps of the method according to any one of claims 1-25.