METHOD FOR OPERATING A MOTOR VEHICLE, CONTROL UNIT FOR A DRIVE SYSTEM, AND A DRIVE SYSTEM

• US 20190001959A1
• Filed: 12/23/2016
• Published: 01/03/2019
• Est. Priority Date: 12/23/2015
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: SCHLUMPP, Florian, RITZERT, Jens, RADKE, Tobias
• Granted Patent: US 10,737,684 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 6/20 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
• CPC Class Codes: B60K 6/48 Parallel type
• 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 20/12 using control strategies taking into account route information estimation or calculation of non-directly measurable driving parameters B60W40/00
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2555/40 Altitude
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 2710/244 Charge state
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: Y02T 10/40 Engine management systems
• 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
• CPC Class Codes: Y02T 10/84 Data processing systems or methods, management, administration
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A method for operating a hybrid drive system for a motor vehicle having an internal combustion engine and an electrical drive, which is supplied by an electrical energy store, the required powers of the internal combustion engine and/or of the electrical drive being set in accordance with a specified load distribution, including: regulating the load distribution between the electrical drive and the internal combustion engine based on a current setpoint state of charge of the electrical energy store; and determining the current setpoint state of charge from a specified linear setpoint state of charge curve between a current position of the motor vehicle and a destination.

Claims

1-12. -12. (canceled)

13. A method for operating a hybrid drive system for a motor vehicle having an internal combustion engine and an electrical drive, the method comprising:

regulating a load distribution between the electrical drive, which is supplied by an electrical energy store, and the internal combustion engine based on a current setpoint state of charge of the electrical energy store, wherein required power of the internal combustion engine and/or of the electrical drive is set in accordance with a specified load distribution; and

determining the current setpoint state of charge from a specified setpoint state of charge curve between a current position of the motor vehicle and a destination.

14. The method of claim 13, further comprising:

ascertaining information about a current state of the motor vehicle, and

updating the specified setpoint state of charge curve as a function of the ascertained information.

15. The method of claim 14, further comprising:

ascertaining an energy differential of the motor vehicle between the current position of the motor vehicle and the destination from the ascertained information,

calculating a correction value for a current setpoint state of charge based on the ascertained energy differential; and

applying the correction value on the current setpoint state of charge.

16. The method of claim 15, further comprising:

ascertaining a current driving speed and/or a current elevation coordinate of the vehicle and/or an absolute elevation at the destination, and

ascertaining the energy differential from a kinetic energy of the vehicle and/or a potential energy of the vehicle with respect to the destination.

17. The method of claim 15, further comprising:

calculating an expected recuperation energy based on an ascertained positive energy differential of the motor vehicle with respect to the destination, the expected recuperation power being converted into a reduction of a current setpoint state of charge, and/or

calculating an additional energy requirement of the motor vehicle based on an ascertained negative energy differential of the motor vehicle with respect to the destination, the calculated additional energy requirement being converted into an increase of a current setpoint state of charge.

18. The method of claim 13, wherein the linear setpoint state of charge curve is determined over a distance between the current position of the motor vehicle and the destination by calculating a linear curve of the setpoint state of charge with respect to the distance between the current position of the motor vehicle and the destination as a function of a state of charge at the current position of the motor vehicle and a specified discharge threshold value, which indicates a maximum admissible discharge.

19. The method of claim 13, wherein an ECMS process based on a current setpoint state of charge is used to regulate the state of charge.

20. The method of claim 13, wherein the method is repeated cyclically.

26. The method of claim 13, wherein the specified linear setpoint state of the charge curve is a specified linear setpoint state of the charge curve.

21. A control unit for operating a hybrid drive system for a motor vehicle having an internal combustion engine and an electrical drive, comprising:

a control device configured to perform the following;

regulating the load distribution between the electrical drive, which is supplied by an electrical energy store, and the internal combustion engine based on a current setpoint state of charge of the electrical energy store, wherein required powers of the internal combustion engine and/or of the electrical drive are set in accordance with a specified load distribution; and

determining the current setpoint state of charge from a specified setpoint state of charge curve between a current position of the motor vehicle and a destination.

27. The control unit of claim 21, wherein the specified linear setpoint state of the charge curve is a specified linear setpoint state of the charge curve.

22. A drive system, comprising:

an internal combustion engine;

an electrical drive, which is supplied by an electrical energy store; and

a control unit for operating a hybrid drive system for a motor vehicle having an internal combustion engine and an electrical drive, including;

a control device configured to perform the following;

regulating the load distribution between the electrical drive, which is supplied by an electrical energy store, and the internal combustion engine based on a current setpoint state of charge of the electrical energy store, wherein required powers of the internal combustion engine and/or of the electrical drive are set in accordance with a specified load distribution; and

determining the current setpoint state of charge from a specified setpoint state of charge curve between a current position of the motor vehicle and a destination.

28. The control unit of claim 22, wherein the specified linear setpoint state of the charge curve is a specified linear setpoint state of the charge curve.

23. A non-transitory computer readable medium having a computer program, which is executable by a processor, comprising:

a program code arrangement having program code for operating a hybrid drive system for a motor vehicle having an internal combustion engine and an electrical drive, by performing the following;

regulating a load distribution between the electrical drive, which is supplied by an electrical energy store, and the internal combustion engine based on a current setpoint state of charge of the electrical energy store, wherein required power of the internal combustion engine and/or of the electrical drive is set in accordance with a specified load distribution; and

determining the current setpoint state of charge from a specified setpoint state of charge curve between a current position of the motor vehicle and a destination.

24. The computer readable medium of claim 23, further comprising:

ascertaining information about a current state of the motor vehicle, and

updating the specified setpoint state of charge curve as a function of the ascertained information.

25. The computer readable medium of claim 23, wherein the specified linear setpoint state of the charge curve is a specified linear setpoint state of the charge curve.