DEFINED INTERNAL COMBUSTION ENGINE OPERATION IN VEHICLES HAVING A HYBRID DRIVE

• US 20090173557A1
• Filed: 03/22/2007
• Published: 07/09/2009
• Est. Priority Date: 04/10/2006
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Mann, Karsten, Schenk, Rene, Huber, Thomas, Baeuerle, Peter, Streib, Martin, Wehmeier, Kersten, Tumback, Stefan, Joos, Klaus, Schnaibel, Eberhard, Kesch, Bernd
• Granted Patent: US 8,167,066 B2
• Time in Patent Office: Days
• US Class Current: 180/65.265
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2260/26 Transition between different drive modes
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• 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 20/11 using model predictive control [MPC] strategies, i.e. control methods based on models predicting performance utilising navigation and traffic information in the control strategy B60W20/12
• CPC Class Codes: B60W 2510/085 Power
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

A method for setting operating states of an internal combustion engine, in particular an internal combustion engine of a hybrid drive. In addition to the internal combustion engine, the hybrid drive includes at least one electric drive, a hybrid coordinator and a control unit assigned to the internal combustion engine in which functions are implemented. The functions request operating states favorable to their running ability from the hybrid coordinator which performs a commensurate modification of the distribution of power between the internal combustion engine and the at least one electric drive.

Claims

1-10. -10. (canceled)

11. A method for setting operating states of an internal combustion engine of a hybrid drive, including at least one electric drive, a hybrid coordinator, a control unit for the internal combustion engine and a control unit including functions running in it, the method comprising:

requesting, from the hybrid coordinator by the functions of the control unit of the internal combustion engine, operating states favorable to a running ability of the functions, the hybrid coordinator performing a commensurate modification of a distribution of power between the internal combustion engine and the at least one electric drive.

12. The method as recited in claim 11, wherein during the modification of the distribution of power between the internal combustion engine and the at least one electric drive, a requested transmission output torque is generated and a requested vehicle speed is maintained.

13. The method as recited in claim 11, wherein the hybrid coordinator constantly sends possible operating states or operating ranges of the internal combustion engine to a coordinator of the internal combustion engine or a scheduler.

14. The method as recited in claim 13, wherein each of the functions or the scheduler for each of the functions checks compatibility of the requests with the possible operating states or possible operating ranges of the internal combustion engine.

15. The method as recited in claim 13, wherein each of the functions sends its operating readiness to the scheduler via a signal or its operating readiness at a specific operating point or operating range via a signal.

16. The method as recited in claim 14, wherein the scheduler selects the functions having the highest priority from those compatible with the possible operating states or the possible operating ranges of the internal combustion engine.

17. The method as recited in claim 16, wherein the selected function sends its operating state request to the hybrid coordinator.

18. The method as recited in claim 14, wherein the scheduler determines those functions having the highest priority and sends at least one of their possible operating points and possible operating states, to the hybrid coordinator.

19. The method as recited in claim 11, wherein a maximum time duration for at least one of an operating state and an operating range, of the internal combustion engine is determined in the hybrid coordinator, the maximum time duration being sent either to the coordinator for the functions or to the scheduler.

20. The method as recited in claim 18, wherein in the event of a modification of the driving state, the hybrid coordinator adjusts the possible operating states of the internal combustion engine, and a change occurs between at least one of various operating states, thrust, idling, normal operation, engine stop, and operating points of the internal combustion engine, without changing the transmission output torque and without changing a transmission output rotational speed.