Extension of DOD operation in torque control system

• US 7,198,029 B1
• Filed: 02/27/2006
• Issued: 04/03/2007
• Est. Priority Date: 02/27/2006
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (Motors Liquidation Co. GUC Trust)
• Inventors: Wong, Kevin C., Spitza, Alfred E. Jr.
• Primary Examiner(s): HUYNH, HAI H
• Application Number:
  US11/362,673
• Time in Patent Office: 400 Days
• Field of Search: 123/399, 123/350, 123/332, 123/481, 123/90.15, 123/198.DB, 123/198.DC, 123/198.F, 701/112
• US Class Current: 123/350
• CPC Class Codes: F02D 13/06 Cutting-out cylinders
• CPC Class Codes: F02D 17/02 Cutting-out cutting-out engines in multiple engine arrangements F02D25/04
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

An engine control system for regulating a torque output of a variable displacement engine includes a first module that calculates a torque modification term based on an engine operating parameter and a second module that determines a desired engine torque and an estimated engine torque. A third module modifies the desired engine torque based on the torque modification term to provide a modified desired engine torque and a fourth module regulates an engine torque output based on the modified desired engine torque and the estimated engine torque when the engine is operating in a deactivated mode.

Claims

1. An engine control system for regulating a torque output of a variable displacement engine, comprising:

a first module that calculates a torque modification term based on an engine operating parameter;

a second module that determines a desired engine torque and an estimated engine torque;

a third module that modifies said desired engine torque based on said torque modification term to provide a modified desired engine torque; and

a fourth module that regulates an engine torque output based on said modified desired engine torque and said estimated engine torque when said engine is operating in a deactivated mode.

2. The engine control system of claim 1 wherein said third module modifies said estimated engine torque to provide a modified estimated engine torque, wherein fourth module regulates said engine torque output based on said modified estimated engine torque.

3. The engine control system of claim 1 wherein said torque modification term includes one of a torque gain and a torque offset.

4. The engine control system of claim 1 wherein said engine operating parameter includes one of a spark timing and a cam phaser position.

5. The engine control system of claim 1 wherein said fourth module regulates said engine torque output based on said desired engine torque and said estimated engine torque when said engine is operating in an activated mode.

6. The engine control system of claim 1 further comprising a fifth module that regulates operation of a vehicle system based on said estimated engine torque while said fourth module regulates said engine output torque based on said modified desired engine torque and a modified estimated engine torque during engine operation in said deactivated mode.

7. The engine control system of claim 6 wherein said vehicle system includes a transmission.

8. The engine control system of claim 1 wherein said desired engine torque is determined based on an accelerator pedal input.

9. The engine control system of claim 1 wherein said estimated engine torque is determined based on engine operating parameters.

10. A method of regulating a torque output of a variable displacement engine, comprising:

calculating a torque modification term based on an engine operating parameter;

determining a desired engine torque and an estimated engine torque;

modifying said desired engine torque based on said torque modification term to provide a modified desired engine torque; and

regulating an engine torque output based on said modified desired engine torque and said estimated engine torque when said engine is operating in a deactivated mode.

11. The method of claim 10 further comprising modifying said estimated engine torque to provide a modified estimated engine torque, wherein said engine torque output is regulated based on said modified estimated engine torque.

12. The method of claim 10 wherein said torque modification term includes one of a torque gain and a torque offset.

13. The method of claim 10 wherein said engine operating parameter includes one of a spark timing and a cam phaser position.

14. The method of claim 10 further comprising regulating said engine torque output based on said desired engine torque and said estimated engine torque when said engine is operating in an activated mode.

15. The method of claim 10 further comprising regulating operation of a vehicle system based on said estimated engine torque while regulating said engine output torque based on said modified desired engine torque and a modified estimated engine torque during engine operation in said deactivated mode.

16. The method of claim 15 wherein said vehicle system includes a transmission.

17. The method of claim 10 wherein said desired engine torque is determined based on an accelerator pedal input.

18. The method of claim 10 wherein said estimated engine torque is determined based on engine operating parameters.

19. A method of regulating a torque output of a variable displacement engine to extend engine operation in a deactivated mode, comprising:

determining a desired engine torque and an estimated engine torque;

determining whether said engine is operating in said deactivated mode;

calculating a torque modification term based on an engine operating parameter when said engine is operating in said deactivated mode;

modifying said desired engine torque based on said torque modification term to provide a modified desired engine torque; and

regulating an engine torque output based on said modified desired engine torque and said estimated engine torque when said engine is operating in a deactivated mode.

20. The method of claim 19 further comprising modifying said estimated engine torque to provide a modified estimated engine torque, wherein said engine torque output is regulated based on said modified estimated engine torque.

21. The method of claim 19 wherein said torque modification term includes one of a torque gain and a torque offset.

22. The method of claim 19 wherein said engine operating parameter includes one of a spark timing and a cam phaser position.

23. The method of claim 19 further comprising regulating said engine torque output based on said desired engine torque and said estimated engine torque when said engine is operating in an activated mode.

24. The method of claim 19 further comprising regulating operation of a vehicle system based on said estimated engine torque while regulating said engine output torque based on said modified desired engine torque and a modified estimated engine torque during engine operation in said deactivated mode.

25. The method of claim 24 wherein said vehicle system includes a transmission.

26. The method of claim 19 wherein said desired engine torque is determined based on an accelerator pedal input.

27. The method of claim 19 wherein said estimated engine torque is determined based on engine operating parameters.