HYBRID POWER TRAIN FLEXIBLE CONTROL INTEGRATION

• US 20120158225A1
• Filed: 12/20/2010
• Published: 06/21/2012
• Est. Priority Date: 12/20/2010
• Status: Active Grant

• Current Assignee: Cummins Incorporated
• Original Assignee: Cummins Incorporated
• Inventors: Books, Martin T., Dollmeyer, Thomas, Rich, Jean Patrick
• Granted Patent: US 9,187,100 B2
• Time in Patent Office: Days
• US Class Current: 701/22
• 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 2050/0008 Feedback, closed loop systems or details of feedback error signal
• CPC Class Codes: B60W 2050/0045 using databus protocols
• CPC Class Codes: B60W 2710/105 Output torque
• CPC Class Codes: B60W 50/00 Details of control systems for road vehicle drive control not related to the control of a particular sub-unit , e.g. process diagnostic or vehicle driver interfaces
• CPC Class Codes: B60W 50/045 Monitoring control system parameters
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A system includes a hybrid power train having an internal combustion engine and an electrical torque provider that combine to provide a total machine torque. The system includes a controller that functionally executes operations to control the hybrid power train. The controller interprets a total machine torque target value and determines a torque contribution for each of the internal combustion engine and the electrical torque provider in response. The controller interprets a supplemental torque contribution value, and controls the internal combustion engine and the electrical torque provider in response to the torque contributions and the supplemental torque contribution value. The supplemental torque contribution value is applied as a limiting value, a target value, or a prescribed ratio for one or both of the torque contributions.

Claims

1. An apparatus, comprising:

a torque demand module structured to interpret a total machine torque target value;

a primary torque contribution module structured to determine a first torque contribution corresponding to a first torque provider and a second torque contribution corresponding to a second torque provider;

a supplemental torque contribution module structured to interpret at least one supplemental torque contribution value; and

a torque provider control module structured to control the first torque provider and the second torque provider in response to the first torque contribution, the second torque contribution, and the supplemental torque contribution value.

2. The apparatus of claim 1, further comprising a datalink interposed between the supplemental torque contribution module and the torque provider control module.

3. The apparatus of claim 1, wherein the supplemental torque contribution value comprises at least one torque value selected from the torque values consisting of:

a minimum torque limit for one of the first torque provider and the second torque provider, a maximum torque limit for one of the first torque provider and the second torque provider, a minimum torque slew limit for one of the first torque provider and the second torque provider, a maximum torque slew limit for one of the first torque provider and the second torque provider, a torque target value for one of the first torque provider and the second torque provider, and a torque division description for the first torque provider and the second torque provider.

4. The apparatus of claim 1, wherein the primary torque contribution module comprises real-time feedback control responsive to the total machine torque target value, the apparatus further comprising an elastic limit module structured to interpret a plurality of torque limit values and to adjust at least one of the first torque contribution and the second torque contribution in response to the torque limit values, and wherein the supplemental torque contribution value is received as one or more of the plurality of torque limit values.

5. The apparatus of claim 4, wherein each of the torque limit values corresponds to one of a plurality of limit priority values, wherein the elastic limit module is further structured to adjust at least one of the first torque contribution and the second torque contribution in response to the limit priority values.

6. The apparatus of claim 1, wherein the primary torque contribution module comprises real-time feedback control responsive to the total machine torque target value, the apparatus further comprising a protective limit module structured to interpret a plurality of protective torque limit values and to adjust at least one of the first torque contribution and the second torque contribution in response to the protective torque limit values, and wherein the supplemental torque contribution value is received as one or more of the protective torque limit values.

7. The apparatus of claim 6, wherein each of the protective torque limit values corresponds to one of a plurality of protective limit priority values, wherein the protective limit module is further structured to adjust at least one of the first torque contribution and the second torque contribution in response to the protective limit priority values.

8. The apparatus of claim 1, wherein the primary torque contribution module comprises real-time feedback control responsive to the total machine torque target value and wherein the torque provider control module adjusts the first torque contribution and the second torque contribution in response to the supplemental torque contribution value, wherein the adjusting is downstream of the real-time feedback control.

9. A system, comprising:

a hybrid power train providing a total machine torque, the hybrid power train comprising an internal combustion engine (ICE) and an electrical torque provider;

a controller, comprising;

a torque demand module structured to interpret a total machine torque target value;

a primary torque contribution module structured to determine an ICE torque contribution and an electrical torque contribution;

a supplemental torque contribution module structured to interpret at least one supplemental torque contribution value; and

a torque provider control module structured to control the ICE and the electrical torque provider in response to the ICE torque contribution, the electrical torque contribution, and the supplemental torque contribution value.

10. The system of claim 9, wherein the torque demand module is further structured to interpret the total machine torque target value in response to a signal provided by a first operator controlled input device.

11. The system of claim 10, wherein the first operator controlled input device comprises an input device selected from the devices consisting of:

an accelerator pedal sensor, a cruise control device, a PTO control device, and a load request device.

12. The system of claim 10, wherein the supplemental torque contribution module is further structured to interpret the supplemental torque contribution value in response to a signal provided by a second load input device.

13. The system of claim 12, wherein the second load input device comprises a load input device selected from the devices consisting of:

a second accelerator pedal sensor, a second cruise control device, a second PTO control device, a second load request device, and a transmission controller.

14. The system of claim 9, wherein the primary torque contribution module comprises real-time feedback control responsive to the total machine torque target value and wherein the torque provider control module adjusts the ICE torque contribution and the electrical torque contribution in response to the supplemental torque contribution value, wherein the adjusting is downstream of the real-time feedback control.

15. The system of claim 9, wherein the electrical torque provider comprises one of a motor/generator within one device and a motor with a generator as two devices, wherein the electrical torque contribution further includes a battery charging generator torque contribution.

16. The system of claim 9, wherein the electrical torque provider comprises a plurality of electrical motors, wherein the electrical torque contribution further comprises a torque contribution corresponding to each of the electrical motors.

17. A method, comprising:

interpreting a total machine torque target value for a hybrid power train comprising a first torque provider and a second torque provider;

determining a first torque contribution corresponding to the first torque provider;

determining a second torque contribution corresponding to the second torque provider;

receiving a supplemental torque contribution value over a datalink; and

controlling the first torque provider and the second torque provider in response to the first torque contribution, the second torque contribution, and the supplemental torque contribution value.

18. The method of claim 17, further comprising limiting one of the first and second torque contributions to a minimum value in response to the supplemental torque contribution value.

19. The method of claim 17, further comprising limiting one of the first and second torque contributions to a maximum value in response to the supplemental torque contribution value.

20. The method of claim 17, further comprising adjusting the first and second torque contributions to reflect a ratio specified in response to the supplemental torque contribution value.

21. The method of claim 17, further comprising limiting one of the first and second torque contributions to a rate of change specified in response to the supplemental torque contribution value.

22. The method of claim 17, wherein the receiving the supplemental torque contribution value is performed downstream of any real-time feedback control elements used to determine the first torque contribution and the second torque contribution.

23. The method of claim 17, wherein the supplemental torque contribution value is provided as one of an elastic limit and a protective limit.

24. The method of claim 23, wherein the supplemental torque contribution value further comprises a priority value, the method further comprising controlling the first torque provider and the second torque provider further in response to the priority value.

25. The method of claim 17, wherein the supplemental torque contribution value further comprises a battery state-of-charge target, the method further comprising controlling the first torque provider and the second torque provider further in response to the battery state-of-charge target.