Granted Patent B2

US 8,255,140 · App. 12/424,220 · Granted Aug 28, 2012

Abstract

Claims (27)

1. An engine control module comprising:

a power module that controls engine power output based on a turbine temperature; and

a turbine temperature module that determines said turbine temperature based on a turbine inlet temperature,

wherein said power module decreases said engine power output when said turbine temperature is greater than or equal to a predetermined threshold temperature.

2. The engine control module of claim 1 wherein said turbine temperature module determines said turbine temperature based on a steady-state engine calibration.

3. The engine control module of claim 2 wherein said steady-state engine calibration includes operating an engine and a turbine in a thermally saturated and stable state.

4. The engine control module of claim 1 wherein said turbine inlet temperature is sensed by a turbine inlet temperature sensor.

5. The engine control module of claim 1 wherein said turbine temperature module determines said turbine inlet temperature based on a turbine inlet temperature sensor model.

6. The engine control module of claim 5 wherein said turbine inlet temperature sensor model is based on a steady-state engine calibration.

7. The engine control module of claim 6 wherein said steady-state engine calibration includes operating an engine and a turbine at a thermally saturated and stable state.

8. The engine control module of claim 1 wherein said power module increases said engine power output by increasing fuel injection when said turbine temperature is less than said predetermined threshold temperature.

9. The engine control module of claim 1 wherein said power module decreases said engine power output by decreasing fuel injection when said turbine temperature is greater than or equal to said predetermined threshold temperature.

10. The engine control module of claim 1 wherein said power module controls said engine power output by controlling a speed of a turbine.

11. The engine control module of claim 10 wherein said turbine includes a variable nozzle turbine.

12. A method comprising:

controlling engine power output based on a turbine temperature;

determining said turbine temperature based on a turbine inlet temperature; and

decreasing said engine power output when said turbine temperature is greater than or equal to a predetermined threshold temperature.

13. The method of claim 12 further comprising determining said turbine temperature based on a steady-state engine calibration.

14. The method of claim 13 further comprising determining said turbine temperature based on operating an engine and a turbine at a thermally saturated and stable state.

15. The method of claim 12 further comprising sensing said turbine inlet temperature using a turbine inlet temperature sensor.

16. The method of claim 12 further comprising determining said turbine inlet temperature based on a turbine inlet temperature sensor model.

17. The method of claim 16 further comprising determining said turbine inlet temperature based on a steady-state engine calibration.

18. The method of claim 17 further comprising determining said turbine inlet temperature based on operating an engine and a turbine at a thermally saturated and stable state.

19. The method of claim 12 further comprising increasing said engine power output by increasing fuel injection when said turbine temperature is less than said predetermined threshold temperature.

20. The method of claim 12 further comprising decreasing said engine power output by decreasing fuel injection when said turbine temperature is greater than or equal to said predetermined threshold temperature.

21. The method of claim 12 further comprising controlling said engine power output by controlling a speed of a turbine.

Assignments (8)