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1. WO2020117798 - COMMANDES DE GROUPE MOTOPROPULSEUR POUR UN MOTEUR ÉLECTRIQUE ET UNE TRANSMISSION MANUELLE AUTOMATISÉE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A vehicle system comprising:

a powertrain including an electric motor operatively coupled with an automated manual transmission; and

an electronic control system including a gear shift control module, a transmission control module, and a motor control module operative communication with one another over one or more controller area networks;

wherein the electronic control system includes supervisory controls configured to:

arbitrate between a plurality of motor operation requests received over the one or more controller area networks to select a winning motor operation request, the plurality of motor operation requests including an operator torque request,

evaluate one or more shift inhibit conditions, and

command the electric motor to provide the winning motor operation request when none of the one or more shift inhibit conditions evaluate as true.

2. The vehicle system of claim 1 wherein the supervisory controls are configured to command the electric motor to provide the winning motor operation request by ramping up or down from current motor torque, speed, and power values to new motor torque, speed and torque values corresponding to the winning motor operation request.

3. The vehicle system of claim 1 wherein the supervisory controls are configured to (a) in response to a gear shift request, suspend a non-shifting response of the motor control module to an operator torque request, and (b) terminate the suspension of the non-shifting response of the motor control module in response to the completion of a gear shift.

4. The vehicle system of claim 1 wherein the one or more inhibit conditions comprise one or more of:

a battery state of charge (SOC) being below an SOC limit,

a battery contactor being open,

a key switch being off,

one or more system power limits being below a system power limit,

a battery charging system being connected,

one or more system faults being active,

service brakes being inactive and an operator command to drive being true,

an operator requested vehicle direction changes while the vehicle system is not stationary, and

look-ahead information indicating that a gear shift should be inhibited.

5. The vehicle system of claim 1 wherein at least one of the one or more controller area networks is provided by a low voltage wiring harness.

6. The vehicle system of claim 1 wherein the one or more controller area networks include a vehicle controller area network, a powertrain controller area network, a service controller area network, and a private controller area network.

7. The vehicle system of claim 6 wherein at least one of the one or more controller area networks is provided by a low voltage wiring harness.

8. The vehicle system of claim 1 wherein the supervisory controls are implemented in the motor control module.

9. The vehicle system of claim 1 wherein one of (a) the powertrain includes one of an engine and a fuel cell, (b) the powertrain is configured as a range-extended electric drive system including an engine configured to drive a generator to provide electrical power to the motor, and (c) the powertrain is configured as a parallel hybrid drive system wherein either or both of an engine and the electric motor are operable to provide torque to propel the vehicle system.

10. The vehicle system of claim 1 wherein the supervisory controls are provided in a supervisory control module, the supervisory control module and the motor control module being physically separate devices.

11. The vehicle system of any of claims 1-10 wherein the powertrain does not have a physical reverse gear, and reverse operation of the vehicle system is provided by reverse rotation of the electric motor.

12. The vehicle system of any of claims 1-10 wherein a direction of vehicle operation is determined by one or more acts of coordination among the supervisory controls, the transmission control module, and the gear shift control module.

13. The vehicle system of claim 12 wherein the one or more acts of coordination include the supervisory controls comparing a first vehicle direction state internal to the supervisory controls with a second internal vehicle direction state of one of the transmission control module and the gear shift control module.

14. The vehicle system of any of claims 1-10 wherein the supervisory controls and the transmission control module assume the same internal vehicle direction state once the vehicle system direction request from the driver has been accepted by the system

15. The vehicle system of any of claims 1-10 wherein the supervisory controls are configured to spin the motor in a reverse direction once the vehicle system direction request has been accepted and the selected reverse gear has been engaged.

16. The vehicle system of any of claims 1-10 wherein the supervisory controls prevent erroneous vehicle operation in the direction not requested by a vehicle operator.

17. The vehicle system of any of claims 1-10 wherein the supervisory controls prevent erroneous vehicle operation by comparing a first internal vehicle direction state with a second internal vehicle direction state of the transmission control module.

18. The vehicle system of any of claims 1-10 wherein the supervisory controls are configured to transmit signals for at least one of torque, speed, and other rotational engine parameters with a sign convention indicating one of a forward state, a reverse state, and a neutral state.

19. The vehicle system of any of claims 1-10 wherein the supervisory controls are configured to at least one of initialize into a neutral state after a key-on event, and move into a neutral state after a key-off event and prior to completing a system power down.

20. The vehicle system of any of claims 1-10 wherein the supervisory controls are configured to maintain zero vehicle speed for a configurable period of time by providing torque commands to the motor while the vehicle system is positioned on a grade greater than a predetermined magnitude.

21. The vehicle system of claim 1 wherein the gear shift control module is configured to generate a message indicating a requested transmission mode in response to an operator command and to transmit the message to the transmission control module and the supervisory controls via the one or more controller area networks.

22. The vehicle system of claim 21 wherein the supervisory controls evaluate whether a transmission mode change inhibit request is true and, if the transmission shift inhibit request is true, generate a message indicating that transmission mode changes are inhibited and transmit the message to the transmission control module via the one or more controller area networks

23. The vehicle system of claim 21 wherein the supervisory controls evaluate whether a transmission mode change inhibit request is true and, if the transmission mode change inhibit request is not true, the supervisory controls generate a message indicating that gear shifts are not inhibited and transmits the message to the transmission control module over via the one or more controller area networks and, in response to the message the transmission control module evaluates whether an internal shift inhibit condition is true.

24. The vehicle system of claim 21 wherein the supervisor control module receives via the or more controller area networks one or more signals indicating the current gear of the

transmission, the selected gear for the shift event, an indication whether a shift event is in progress, and a requested torque and speed of the motor for execution of the shift event and, in response, the supervisory controls evaluate whether the requested torque and speed of the motor for execution of the shift event can be provided.

25. The vehicle system of claim 24 wherein, one of (a) if the supervisory controls evaluate that the requested torque and speed of the motor for execution of the shift event cannot be provided, the supervisory controls inhibit gear shifting and generates and transmit a message to the gear shift control module via the one or more controller area networks indicating that an operator perceptible indication that the gear shift is inhibited should be provided, and (b) if the supervisory controls evaluate that the requested torque and speed of the motor for execution of the shift event can be provided, the supervisory controls generate and send a message to the motor control module to provide the commanded motor torque and speed, and generate and send a message to the transmission control module indicating the commanded motor torque and speed.

26. A method of controlling the operation of a vehicle powertrain, the method comprising: operating an electronic control system to control an electric motor of the vehicle system powertrain to provide torque to an automated manual transmission, the electronic control system including a gear shift control module, a transmission control module, and a motor control module in operative communication with one or more controller area networks, the electronic control system including supervisory controls implemented in one or both of the motor control module and a supervisory control module in operative communication with the one or more controller area networks;

operating the supervisory controls to arbitrate between a plurality of motor operation requests received over the one or more controller area networks to select a winning motor operation request, the plurality of motor operation requests including an operator torque request, operating the supervisory controls to evaluate one or more shift inhibit conditions, and operating the supervisory controls to command the electric motor to provide the winning motor operation request when none of the one or more shift inhibit conditions evaluate as true.

27. The method of claim 26 comprising: operating the supervisory controls to command the electric motor to provide the winning motor operation request by ramping up or down from current motor torque, speed, and power values to new motor torque, speed and torque values

corresponding to the winning motor operation request.

28. The method of claim 26 comprising operating the supervisory controls to (a) suspend a non-shifting response of the motor control module to an operator torque request in response to a gear shift request, and (b) terminate the suspension of the non-shifting response of the motor control module in response to the completion of a gear shift.

29. The method of claim 26 wherein the one or more inhibit conditions comprise one or more of:

a battery state of charge (SOC) being below an SOC limit,

a battery contactor being open,

a key switch being off,

one or more system power limits being below a system power limit,

a battery charging system being connected,

one or more system faults being active,

service brakes being inactive and an operator command to drive being true,

an operator requested vehicle direction changes while the vehicle system is not stationary, and

look-ahead information indicating that a gear shift should be inhibited.

30. The method of claim 26 wherein at least one of the one or more controller area networks is provided by a low voltage wiring harness.

31. The method of claim 26 wherein the one or more controller area networks include a vehicle controller area network, a powertrain controller area network, a service controller area network, and a private controller area network.

32. The method of claim 31 wherein at least one of the one or more controller area networks is provided by a low voltage wiring harness.

33. The method of claim 36 wherein the supervisory controls are implemented in the motor control module.

34. The method of claim 33 wherein one of (a) the powertrain includes one of an engine and a fuel cell, (b) the powertrain is configured as a range-extended electric drive system wherein an engine is configured to drive a generator to provide electrical power to the motor, and (c) the powertrain is configured as a parallel hybrid drive system wherein either or both of an engine and the electric motor are operable to provide torque to propel the vehicle system.

35. The method of claim 33 wherein the motor control module and the supervisory control module are provided in physically separate devices and the supervisory controls are implemented in the supervisory control module.

36. The method of any of claims 26-35 wherein the powertrain does not have a physical reverse gear, and reverse operation of the vehicle system is provided by reverse rotation of the electric motor.

37. The method of any of claims 26-35 wherein a direction of vehicle operation is determined by one or more acts of coordination among the supervisory controls, transmission control module, and gear shift control module coordinate.

38. The method of claim 37 wherein the one or more acts of coordination include the supervisory controls comparing a first vehicle direction state internal to the supervisory controls with a second vehicle direction state internal to one or both of the transmission control module and the gear shift control module.

39. The method of any of claims 26-35 wherein the supervisory controls and the transmission control module assume the same internal vehicle direction state once the vehicle system direction request from the driver has been accepted by the system.

40. The method of any of claims 26-35 wherein the supervisory controls spin the motor in the reverse direction once the vehicle system direction request has been accepted and the selected reverse gear has been engaged.

41. The method of any of claims 26-35 wherein the supervisory controls prevent erroneous vehicle operation in the direction not requested by a vehicle operator.

42. The method of any of claims 26-35 wherein the supervisory controls prevent erroneous vehicle operation by comparing its internal vehicle direction state with an internal vehicle direction state of the transmission control module.

43. The method of any of claims 26-35 wherein the supervisory controls transmit signals for one or more of torque and speed with a sign convention indicating one of a forward state, a reverse state, and a neutral state.

44. The method of any of claims 26-35 wherein the supervisory controls at least one of initialize into a neutral state after a key-on event, and move into a neutral state after a key-off event and prior to completing a system power down.

45. The vehicle system of any of 26-35 wherein the supervisory controls maintain zero vehicle speed for a configurable period of time by providing torque commands to the motor while the vehicle system is positioned on a grade greater than a predetermined magnitude.

46. The method of claim 26 wherein the gear shift control generates a message indicating a requested transmission mode in response to an operator command and to transmits the message to the transmission control module and the supervisory controls via the one or more controller area networks.

47. The method of claim 46 wherein the supervisory controls evaluate whether a transmission shift inhibit request is true and one of (a) if the shift inhibit request is true, generate a message indicating that shifting is inhibited and transmit the message to the transmission control module via the one or more controller area networks, and (b) if shift inhibit request is not true, generate a message indicating that gear shifts are not inhibited and transmit the message to the transmission control module via the one or more controller area networks, wherein, in response to the message, the transmission control module evaluates whether an internal shift inhibit condition is true.

48. The method of claim 46 wherein the supervisor control module receives via the or more controller area networks one or more signals indicating the current gear of the transmission, the selected gear for the shift event, an indication whether a shift event is in progress, and a requested torque and speed of the motor for execution of the shift event and, in response, the supervisory controls evaluate whether the requested torque and speed of the motor for execution of the shift event can be provided.

49. The method of claim 48 wherein, if the supervisory controls evaluate that the requested torque and speed of the motor for execution of the shift event cannot be provided, the supervisory controls inhibits gear shifting and generates and transmits a message to the gear shift control module via the one or more controller area networks indicating that an operator perceptible indication that the gear shift is inhibited should be provided.

50. The method of claim 48 wherein, if the supervisory controls evaluate that the requested torque and speed of the motor for execution of the shift event can be provided, supervisory controls generate and sends a message to the motor control module to provide the commanded motor torque and speed, and generates and sends a message to the transmission control module indicating the commanded motor torque and speed.