System and method for energy rate balancing in hybrid automatic transmissions

• US 10,029,672 B2
• Filed: 01/31/2017
• Issued: 07/24/2018
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Allison Transmission Incorporated (Allison Transmission Holdings Incorporated)
• Original Assignee: Allison Transmission Incorporated (Allison Transmission Holdings Incorporated)
• Inventors: West, Stephen T., Runde, Jeffrey K., Kresse, John P.
• Primary Examiner(s): Troost, Aaron L
• Application Number:
  US15/420,123
• Publication Number:
  US 20170137019A1
• Time in Patent Office: 539 Days
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 10/115 with planetary gears
• CPC Class Codes: B60W 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 20/16 for reducing engine exhaust emissions
• CPC Class Codes: B60W 20/30 Control strategies involving selection of transmission gear ratio control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H
• CPC Class Codes: B60W 2050/0041 of the drive line
• CPC Class Codes: B60W 2510/0241 Clutch slip, i.e. difference between input and output speeds
• CPC Class Codes: B60W 2510/0275 Clutch torque
• CPC Class Codes: B60W 2510/0283 Clutch input shaft speed
• CPC Class Codes: B60W 2510/0666 Engine power
• CPC Class Codes: B60W 2510/085 Power
• CPC Class Codes: B60W 2510/1005 Transmission ratio engaged
• CPC Class Codes: B60W 2510/104 Output speed
• CPC Class Codes: B60W 2510/1045 Output speed change rate
• CPC Class Codes: B60W 2510/106 Output power
• CPC Class Codes: B60W 2510/107 Temperature
• CPC Class Codes: B60W 2510/1075 : fluid pressure, e.g. oil pressure
• CPC Class Codes: B60W 2510/108 : pressure of control fluid
• CPC Class Codes: B60W 2510/1085 : pressure of working fluid
• CPC Class Codes: B60W 2510/1095 : Inertia
• CPC Class Codes: B60W 2510/244 : Charge state
• CPC Class Codes: B60W 2510/305 : Power absorbed by auxiliaries
• CPC Class Codes: B60W 2540/10 : Accelerator pedal position
• CPC Class Codes: B60W 2540/12 : Brake pedal position
• CPC Class Codes: B60W 2540/215 : Selection or confirmation of options
• CPC Class Codes: B60W 2710/0677 : Engine power
• CPC Class Codes: B60W 2710/086 : Power
• CPC Class Codes: B60W 2710/1061 : Output power
• CPC Class Codes: B60W 30/188 : Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: B60W 50/082 : Selecting or switching between different modes of propelling
• CPC Class Codes: B60Y 2200/92 : Hybrid vehicles
• CPC Class Codes: B60Y 2300/188 : Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y10S 903/93 : Conjoint control of different elements

Abstract

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver'"'"'s input.

Claims

1. A method, comprising:

determining a target drive train output power using the controller, wherein the target drive train output power is determined using a command input and a user preference selectable by a user of the drive train;

determining the power source output power using the controller, wherein the target drive train output power is derived from the power source output power; and

wherein the controller determines the power source output power using one or more loss parameters and the target drive train output power; and

controlling a power source output power of a vehicle using a controller, wherein the vehicle has a drive train and a power source, and wherein the controller controls the power source and the drive train;

wherein the loss parameters include a kinetic power loss, and wherein the kinetic power loss is calculated as a function of rotational inertia loss parameters within the drive train.

2. The method of claim 1, further comprising:

calculating a power loss within the drive train using the controller, the controller calculating the power loss using the one or more loss parameters, and

controlling the power source output power provided to the drive train using the controller.

3. The method of claim 1, wherein the user preference includes a fuel economy preference.

4. The method of claim 1, wherein the user preference includes an emissions minimization preference.

5. The method of claim 1, wherein the user preference includes an output power maximization preference.

6. The method of claim 1, wherein the user preference includes a driver comfort preference.

7. The method of claim 1, wherein the power source includes an engine and a hybrid module, wherein the hybrid module includes an electric motor.

8. The method of claim 1, wherein the kinetic power loss includes a rotational inertia of at least one body in the drive train.

9. The method of claim 1, wherein the kinetic power loss includes a rotational speed of at least one body in the drive train.

10. The method of claim 1, wherein the kinetic power loss includes a rotational acceleration of at least one body in the drive train.

11. The method of claim 1, wherein the drive train has at least one clutch, wherein the loss parameters include a clutch power loss for the at least one clutch, wherein the at least one clutch has a plurality of clutch plates.

12. The method of claim 1, wherein the loss parameters include a torque transmitted between a plurality of clutch plates during engagement of a clutch in the drive train.

13. The method of claim 1, wherein the loss parameters include a rotational speed of a clutch plate in a plurality of clutch plates in the drive train.

14. The method of claim 1, wherein the loss parameters include a power dissipated during engagement of a plurality of clutch plates in a clutch that is part of the drive train.

15. The method of claim 1, wherein the loss parameters include a pressure of a hydraulic fluid in the drive train.

16. The method of claim 1, wherein the loss parameters include a temperature of a hydraulic fluid in the drive train.

17. The method of claim 1, wherein the loss parameters include a flow rate of a hydraulic fluid in the drive train.

18. A method, comprising:

determining a target power profile using the controller, wherein the target power profile defines a target power output that is determined using a command input and a user preference;

calculating a power loss within a vehicle drive train using the controller, the controller calculating the power loss using the one or more loss parameters of the vehicle drive train, the vehicle drive train having a power source;

determining a power source output power using the controller, wherein the controller determines the power source output power using the power loss and the one or more loss parameters and the target power output;

determining an input power using the control module, wherein the input power is sufficient to supply the target power output defined by the target power profile; and

controlling the vehicle drive train to provide the target output power;

wherein the loss parameters include a kinetic power loss, and wherein the kinetic power loss is calculated as a function of rotational inertia loss parameters within the drive train.

19. The method of claim 18, wherein the user preference includes a fuel economy preference.

20. The method of claim 18, wherein the user preference includes an emissions minimization preference.

21. The method of claim 18, wherein the user preference includes an output power maximization preference.

22. The method of claim 18, wherein the user preference includes a driver comfort preference.

23. The method of claim 18, wherein the user selects the user preference from an interface configured to present one or more user preferences.

24. The method of claim 18, wherein the power source includes an engine and a hybrid module, wherein the hybrid module includes an electric motor.

25. The method of claim 18, wherein the kinetic power loss includes a rotational inertia, a rotational speed, or a rotational acceleration of at least one body in the drive train.

26. The method of claim 18, wherein the loss parameters include a power dissipated during engagement of a plurality of clutch plates in a clutch that is part of the drive train.

27. The method of claim 18, wherein the loss parameters include a pressure of a hydraulic fluid in the drive train.

28. The method of claim 18, wherein the loss parameters include a temperature of a hydraulic fluid in the drive train.

29. The method of claim 18, wherein the loss parameters include a flow rate of a hydraulic fluid in the drive train.