Method for Operating a Combustion Engine

• US 20090211825A1
• Filed: 09/18/2006
• Published: 08/27/2009
• Est. Priority Date: 10/25/2005
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Hernier, Markus, Mann, Karsten
• Application Number:
  US12/084,071
• Publication Number:
  US 20090211825A1
• Time in Patent Office: Days
• US Class Current: 180/65.275
• 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 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• 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 2710/0616 Position of fuel or air injector
• CPC Class Codes: B60W 30/1882 characterised by the working point of the engine, e.g. by using engine output chart
• CPC Class Codes: F02D 41/3035 a mode being the premixed charge compression-ignition mode
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A method for operating a combustion engine, in which at least one electric motor for providing drive assistance is activated at least intermittently in a normal driving mode having a requested drive power. It is provided that the combustion engine is operated selectively in steady-state or dynamic fashion as a function of a selected combustion process.

Claims

1-11. -11. (canceled)

12. A method for operating a combustion engine, the method comprising:

activating at least one electric motor for providing drive assistance at least intermittently in a normal driving mode having a requested drive power; and

selectively operating the combustion engine in a steady-state, a quasi steady-state or dynamically as a function of a selected combustion process.

13. The method of claim 12, wherein during a steady-state operation of the combustion engine, a dynamic power component of the requested drive power is provided by an electric motor.

14. The method of claim 12, wherein in a dynamic operation, the combustion engine generates at least a portion of a dynamic power component.

15. The method of claim 12, wherein the combustion process is selected as a function of emissions of the combustion engine.

16. The method of claim 12, wherein in a steady-state operation, a total fuel quantity needed for a specific engine cycle is injected directly into a combustion chamber of the combustion engine, and thereupon ignited.

17. The method of claim 16, wherein in a dynamic operation, fuel is injected into the combustion chamber even after ignition has begun.

18. The method of claim 12, wherein to set an increased power output in a steady-state operation, the combustion engine is not fired for a brief time, and is pulled by the electric motor to a new operating point.

19. The method of claim 18, wherein while the combustion engine is being pulled, an air-side charge cycle of the combustion air of the combustion engine is optimized for the new operating point.

20. The method of claim 12, wherein the steady-state operation of the combustion engine is set in a part-load range of the combustion engine.

21. The method of claim 12, wherein the dynamic operation of the combustion engine is set in at least one of a high-load range, a full-load range, and at high speeds of the combustion engine.

22. A hybrid vehicle having at least one combustion engine, comprising:

at least one electric motor for providing drive assistance, and which is activatable at least intermittently in a normal driving mode having a requested drive power; and

setting a dynamic operation of the combustion engine in at least one of a high-load range, a full-load range, and at high speeds of the combustion engine.