Method for setting the operating point of a drive train

• US 20060060397A1
• Filed: 07/25/2003
• Published: 03/23/2006
• Est. Priority Date: 12/07/2002
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Bischoff, Claus, Schulz, Marcus
• Application Number:
  US10/532,380
• Publication Number:
  US 20060060397A1
• Time in Patent Office: Days
• US Class Current: 180/65.280
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/04 including control of propulsion units
• 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 10/26 for electrical energy, e.g. batteries or capacitors
• 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 20/20 Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
• CPC Class Codes: B60W 2510/24 Energy storage means
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 30/188 Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• 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
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility

Abstract

A method for setting the operating point of a drive train whose purpose is to provide a mechanical and an electrical power output. The appropriate characteristic map is selected from a plurality of characteristic maps on the basis of the required electrical power, and, from this characteristic map, the operating point is selected on the basis of a plurality of kinematic and/or dynamic degrees of freedom.

Claims

1-11. -11. (canceled)

12. A method for setting an operating point of a drive train whose purpose is to provide a mechanical and an electrical power output, the method comprising:

selecting an appropriate characteristic map from a plurality of characteristic maps on the basis of a required electrical power; and

as a function of the characteristic map, selecting the operating point on the basis of a plurality of at least one of kinematic and dynamic degrees of freedom.

13. The method according to claim 12, wherein a control for an energy storage device of an on-board electrical system supplies a parameter which is indicative of a condition of the energy storage device, and the appropriate characteristic map is additionally selected on the basis of the parameter.

14. The method according to claim 13, wherein, in order to determine the required electrical power of the on-board electrical system, an electrical power required by power consumers and an electrical power one of demanded from and deliverable by the energy storage device are taken into consideration.

15. The method according to claim 14, further comprising one of charging and discharging the energy storage device as a function of the characteristic map.

16. The method according to claim 13, further comprising assigning the required electrical power of the on-board electrical system to a power stage, on whose basis the appropriate characteristic map is selected.

17. The method according to claim 16, wherein the power stage is additionally selected on the basis of at least one of the condition of the energy storage device of the on-board electrical system and a level of an available voltage.

18. The method according to claim 12, wherein the method is performed in a motor vehicle.

19. The method according to claim 18, wherein a first degree of freedom is constituted of a variable that represents a speed of the motor vehicle.

20. The method according to claim 12, wherein a second degree of freedom is constituted of a setpoint torque.

21. The method according to claim 12, wherein the drive train has a transmission, and a ratio of the transmission is controlled.

22. The method according to claim 12, wherein the drive train has an electric drive and an internal combustion drive, at least one of a torque and a speed of the internal combustion drive is specified, and at least one of a torque and a speed of the electric drive is specified.