System and method for energy rate balancing in hybrid automatic transmissions

• US 10,166,971 B2
• Filed: 01/30/2017
• Issued: 01/01/2019
• 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:
  US15/419,221
• Publication Number:
  US 20170137015A1
• Time in Patent Office: 701 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:

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;

determining a target drive train output power using the controller, wherein the target drive train output power is determined using a command input; and

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;

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; and

wherein the loss parameters include a clutch power loss for a clutch, wherein the drive train has at least one clutch, wherein the clutch has a plurality of clutch plates, and wherein the clutch power loss is calculated as a function of clutch loss parameters.

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 clutch loss parameters include a torque transmitted between the plurality of clutch plates during engagement of the clutch.

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

5. The method of claim 1, wherein the clutch loss parameters include a power dissipated during engagement of the plurality of clutch plates.

6. The method of claim 1, wherein the drivetrain includes a transmission configured to provide multiple output gear ratios, wherein the clutch is part of the transmission, and wherein the clutch power loss occurs when the transmission changes output gear ratios.

7. The method of claim 1, wherein the clutch power loss is represented by the equation:

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

9. A method, comprising:

determining a target drive train output power profile using a control module, wherein the target drive train output power profile is determined using a command input;

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

controlling a hybrid vehicle according to the output power profile using a control module, wherein the hybrid vehicle has a power source and a drive train, and wherein the control module controls the drive train and the power source;

wherein the control module establishes the input power using one or more loss parameters and the target drive train output power profile;

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;

wherein the loss parameters include a clutch power loss for a clutch;

wherein the drive train has at least one clutch;

wherein the clutch has a plurality of clutch plates; and

wherein the clutch power loss is calculated as a function of clutch loss parameters.

10. The method of claim 9, further comprising:

determining a current state of the vehicle using the control module;

calculating a power loss within the drive train using the control module, the control module calculating the power loss using the one or more loss parameters; and

controlling the power source to provide the input power to the drive train using the control module.

11. The method of claim 9, wherein the clutch loss parameters include a torque transmitted between the plurality of clutch plates during engagement of the clutch.

12. The method of claim 9, wherein the clutch loss parameters include a rotational speed of each clutch plate in the plurality of clutch plates.

13. The method of claim 9, wherein the clutch loss parameters include a power dissipated during engagement of the plurality of clutch plates.

14. The method of claim 9, wherein the drivetrain includes a transmission configured to provide multiple output gear ratios, wherein the clutch is part of the transmission, and wherein the clutch power loss occurs when the transmission changes output gear ratios.

15. The method of claim 9, wherein the clutch power loss is represented by the equation:

16. The method claim 9, wherein the power source includes an engine and a hybrid module, wherein the hybrid module includes an electric motor.

17. A method for operating a vehicle having a controller and a drive train including an engine, a hybrid module having an electric motor, and a transmission and, the controller arranged and configured to:

determine a target drive train output power using a command input;

determine hydraulic power loss of the drive train as a function of hydraulic loss parameters within the transmission, wherein the hydraulic power loss is calculated as a function of a pressure, temperature, and flow rate of hydraulic fluid in the drive train;

determining kinetic power loss of the drive train as a function of rotational inertia loss parameters within the drive train;

determining clutch power loss of the drive train as a function of clutch loss parameters within the transmission;

establishing the input power needed to reach the target drive train output power as a function of the hydraulic loss parameters, the rotational inertia loss parameters, and the clutch loss parameters; and

adjusting the power supplied by the power source to reach the target drive train output power.

18. The method of claim 17, wherein the clutch loss parameters include a torque transmitted between the plurality of clutch plates during engagement of the clutch.

19. The method of claim 17, wherein the clutch loss parameters include a rotational speed of each clutch plate in the plurality of clutch plates.

20. The method of claim 17, wherein the clutch loss parameters include a power dissipated during engagement of the plurality of clutch plates.

21. The method of claim 17, wherein the transmission is configured to provide multiple output gear ratios, wherein the clutch is part of the transmission, and wherein the clutch power loss occurs when the transmission changes output gear ratios.