Granted Patent B2

US 8,116,954 · App. 12/019,921 · Granted Feb 14, 2012

Abstract

Claims (35)

1. An engine control module comprising:

a torque control module that determines a first desired torque based on a requested torque;

an engine speed (RPM) control module that selectively determines a second desired torque based on a desired RPM,

wherein the torque control module determines the first desired torque further based on the second desired torque when the engine control module is transitioning from an RPM control mode to a torque control mode,

wherein the RPM control module determines the second desired torque further based on the first desired torque when the engine control module is transitioning from the torque control mode to the RPM control mode; and

an actuator module that controls an actuator of an engine based on the first desired torque when the engine control module is in the torque control mode and based on the second desired torque when the engine control module is in the RPM control mode.

2. The engine control module of claim 1 further comprising a mode determination module that selects the RPM control mode when the first desired torque is less than a predetermined value and that selects the torque control mode when the first desired torque is greater than or equal to the predetermined value.

3. The engine control module of claim 1 wherein the torque control module determines the first desired torque further based on a delta torque.

4. The engine control module of claim 3 wherein the torque control module determines the delta torque based on the second desired torque and a predicted torque when the engine control module is transitioning from the RPM control mode to the torque control mode.

5. The engine control module of claim 3 wherein the torque control module decays the delta torque to zero when the engine control module is in the torque control mode.

6. The engine control module of claim 3 wherein the requested torque comprises a pedal position torque and a zero torque.

7. The engine control module of claim 6 wherein the torque control module determines the delta torque based on the second desired torque and the zero torque when the engine control module is transitioning from the RPM control mode to the torque control mode.

8. The engine control module of claim 1 wherein the RPM control module determines the second desired torque further based on a measured RPM, a reserve torque, and an RPM integral.

9. The engine control module of claim 8 wherein the desired RPM comprises a minimum torque.

10. The engine control module of claim 9 wherein the RPM control module determines the RPM integral based on the first desired torque and the minimum torque when the engine control module is transitioning from the torque control mode to the RPM control mode.

11. The engine control module of claim 8 wherein the RPM control module determines the RPM integral based on the desired RPM and the measured RPM when the engine control module is in the RPM control mode.

12. The engine control module of claim 1 wherein the actuator module comprises at least one of a throttle actuator module, a boost actuator module, and a phaser actuator module.

13. A method of operating an engine control module comprising:

determining a first desired torque based on a requested torque;

selectively determining a second desired torque based on a desired RPM;

determining the first desired torque further based on the second desired torque when the engine control module is transitioning from an RPM control mode to a torque control mode;

determining the second desired torque further based on the first desired torque when the engine control module is transitioning from the torque control mode to the RPM control mode; and

controlling an actuator of an engine based on the first desired torque when the engine control module is in the torque control mode and based on the second desired torque when the engine control module is in the RPM control mode.

14. The method of claim 13 further comprising:

selecting the RPM control mode when the first desired torque is less than a predetermined value; and

selecting the torque control mode when the first desired torque is greater than or equal to the predetermined value.

15. The method of claim 13 further comprising determining the first desired torque further based on a delta torque.

16. The method of claim 15 further comprising determining the delta torque based on the second desired torque and a predicted torque when the engine control module is transitioning from the RPM control mode to the torque control mode.

17. The method of claim 15 further comprising decaying the delta torque to zero when the engine control module is in the torque control mode.

18. The method of claim 15 wherein the requested torque comprises a pedal position torque and a zero torque.

19. The method of claim 18 further comprising determining the delta torque based on the second desired torque and the zero torque when the engine control module is transitioning from the RPM control mode to the torque control mode.

20. The method of claim 13 further comprising determining the second desired torque further based on a measured RPM, a reserve torque, and an RPM integral.

21. The method of claim 20 wherein the desired RPM comprises a minimum torque.

22. The method of claim 21 further comprising determining the RPM integral based on the first desired torque and the minimum torque when the engine control module is transitioning from the torque control mode to the RPM control mode.

23. The method of claim 20 further comprising determining the RPM integral based on the desired RPM and the measured RPM when the engine control module is in the RPM control mode.

Assignments (13)