CONTROL SYSTEMS AND METHODS FOR SUPER TURBO-CHARGED ENGINES

• US 20130174545A1
• Filed: 01/09/2012
• Published: 07/11/2013
• Est. Priority Date: 01/09/2012
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Kalebjian, Christopher J., Xiao, Yun, Kuieck, Bryan A., Andrasko, Steven J.
• Granted Patent: US 8,925,316 B2
• Time in Patent Office: Days
• US Class Current: 60/602
• CPC Class Codes: F02B 37/04 Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
• CPC Class Codes: F02B 37/12 Control of the pumps
• CPC Class Codes: F02B 37/14 Control of the alternation between or the operation of exhaust drive and other drive of a pump, e.g. dependent on speed
• CPC Class Codes: F02B 37/16 by bypassing charging air
• CPC Class Codes: F02B 37/162 by bypassing, e.g. partially, intake air from pump inlet to pump outlet
• CPC Class Codes: F02D 2200/0406 Intake manifold pressure
• CPC Class Codes: F02D 23/00 Controlling engines characterised by their being supercharged
• CPC Class Codes: F02D 41/0007 for control of turbo-charged or super-charged engines control of the pumps per se F02B37/12
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A method of controlling airflow of an engine system is provided. The method includes determining a supercharger operating mode and a turbocharger operating mode based on engine load; selectively generating a control signal to a turbocharger based on the turbocharger operating mode; and selectively generating a control signal to a supercharger bypass valve based on the supercharger operating mode.

Claims

1. A method of controlling airflow of an engine system, comprising:

determining a supercharger operating mode and a turbocharger operating mode based on engine load;

selectively generating a control signal to a turbocharger based on the turbocharger operating mode; and

selectively generating a control signal to a supercharger bypass valve based on the supercharger operating mode.

2. The method of claim 1, wherein the turbocharger operating mode is determined to be at least one of a closed loop mode, and an open loop mode.

3. The method of claim 2, wherein when the turbocharger operating mode is the closed loop mode, the control signal to the turbocharger controls a compression of air by the turbocharger based on at least one of an engine airflow requirement and a pressure requirement.

4. The method of claim 2, wherein when the turbocharger operating mode is the open loop mode, the control signal to the supercharger restricts the compression of air by the turbocharger based on engine load and engine speed.

5. The method of claim 1, further comprising determining an engine load status to be at least one of a low load status, a high load status, and a transient load status based on the engine load, and wherein the determining the supercharger operating mode and the turbocharger operating mode is based on the engine load status.

6. The method of claim 1, wherein the supercharger operating mode is determined to be at least one of a closed loop mode, and an open loop mode.

7. The method of claim 5, wherein when the supercharger operating mode is the closed loop mode, the control signal to the supercharger bypass valve controls a compression of air by the supercharger based on at least one of an engine airflow requirement and a pressure requirement.

8. The method of claim 5, wherein when the operating mode is the open loop mode, the control signal to the supercharger bypass valve restricts the compression of air by the supercharger based on engine load and engine speed.

9. The method of claim 1, wherein the turbocharger operating mode and the supercharger operating mode are determined to be at least one of an open loop mode and a closed loop mode.

10. The method of claim 9, wherein the supercharger operating mode is determined to be the open loop mode and the turbocharger operating mode is determined to be the closed loop mode.

11. The method of claim 9, wherein the supercharger operating mode is determined to be the closed loop mode and the turbocharger operating mode is determined to be the open loop mode.

12. A system for controlling airflow within an engine system, comprising:

a first module that determines a turbocharger operating mode and a supercharger operating mode based on engine load; and

a second module that selectively generates control signals to a turbocharger and a supercharger bypass valve based on the turbocharger operating mode and the supercharger operating mode.

13. The system of claim 12, wherein the first module determines the turbocharger operating mode to be at least one of a closed loop mode, and an open loop mode.

14. The system of claim 13, wherein when the turbocharger operating mode is the closed loop mode, the second module generates a control signal to the turbocharger based on at least one of an engine airflow requirement and a pressure requirement.

15. The system of claim 13, wherein when the turbocharger operating mode is the open loop mode, the second module generates a control signal to the turbocharger based on engine load and engine speed.

16. The system of claim 12, further comprising a third module that determines an engine load status to be at least one of a low load status, a high load status, and a transient status, and wherein the first module determines the turbocharger operating mode and the supercharger operating mode based on the load status.

17. The system of claim 12, wherein the first module determines the supercharger operating mode to be at least one of a closed loop mode, and an open loop mode.

18. The system of claim 17, wherein when the supercharger operating mode is the closed loop mode, the second module generates a control signal to the supercharger bypass valve based on at least one of an engine airflow requirement and a pressure requirement.

19. The system of claim 17, wherein when the supercharger operating mode is the open loop mode, the second module generates a control signal to the super charger bypass valve based on engine speed and engine load.

20. The system of claim 12, wherein the first module determines the turbocharger operating mode and the supercharger operating mode to be at least one of an open loop mode and a closed loop mode.