ACCESSORY DRIVE CONFIGURATION

• US 20120167857A1
• Filed: 05/10/2011
• Published: 07/05/2012
• Est. Priority Date: 12/31/2010
• Status: Active Grant

• Current Assignee: Cummins Incorporated
• Original Assignee: Cummins Incorporated
• Inventors: Barnes, David M., Augustin, Kevin Sr.
• Granted Patent: US 8,678,116 B2
• Time in Patent Office: Days
• US Class Current: 123/198.R
• CPC Class Codes: B60K 2025/005 driven by electric motors forming part of the propulsion unit
• CPC Class Codes: B60K 6/48 Parallel type
• 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 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• 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 2710/305 target power to auxiliaries
• CPC Class Codes: F02B 67/04 of mechanically-driven auxiliary apparatus
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

An apparatus for an accessory drive configuration includes an internal combustion engine having a crankshaft which is structured to provide traction power. A torque-transmitting shaft extends through a portion of an internal combustion engine assembly, and the torque-transmitting shaft provides mechanical power to an accessory drive system. The internal combustion engine and an electric motor are operably coupled to the torque-transmitting shaft to selectively provide torque to the torque-transmitting shaft.

Claims

1. A system, comprising:

a torque-transmitting shaft extending through at least a portion of an internal combustion engine assembly, wherein the internal combustion engine assembly includes a crankshaft mechanically coupled to a load;

a controller including an accessory drive selection module structured to select one of an electric motor and an internal combustion engine as a torque-transmitting shaft power source; and

an accessory drive system mechanically powered by the torque-transmitting shaft.

2. The system of claim 1, wherein the at least a portion of the internal combustion engine assembly comprises one of an engine block and a cylinder head.

3. The system of claim 1, wherein the internal combustion engine is a diesel engine having at least one overhead camshaft.

4. The system of claim 3, wherein the torque-transmitting shaft extends through at least a portion of a through block cam bore.

5. The system of claim 1, wherein the torque-transmitting shaft extends coaxially with a camshaft, wherein the camshaft and the torque-transmitting shaft are structured for independent rotation.

6. The system of claim 1, wherein the accessory drive system includes at least one accessory selected from the group of accessories consisting of:

a pump, a fan, and a compressor.

7. The system of claim 1, further comprising:

a rear accessory drive system selectively coupled to the internal combustion engine and the electric motor; and

the controller further comprising a rear accessory drive selection module structured to select a rear accessory power source, the rear accessory power source comprising at least one of the internal combustion engine and the electric motor.

8. The system of claim 7, wherein the rear accessory drive system includes at least one accessory selected from the group of accessories consisting of:

an air compressor, a refrigeration compressor, and a pump.

9. The system of claim 1, wherein the electric motor is a traction motor/generator electrically coupled to an electrical energy storage device selected from the group of electrical energy storage devices consisting of:

a nickel metal hydride battery, a lithium ion battery, and a fuel cell.

10. The system of claim 9, wherein the traction motor/generator, the internal combustion engine, and the electrical energy storage device are operably coupled in a series hybrid configuration.

11. The system of claim 1, wherein the controller further comprises an accessory power determination module structured to determine a target torque for driving the accessory drive system, wherein the accessory drive selection module is further structured to select the torque-transmitting shaft power source in response to the target torque.

12. An apparatus, comprising:

an internal combustion engine having a crankshaft structured to provide traction power;

a torque-transmitting shaft extending through a portion of an internal combustion engine assembly, the torque-transmitting shaft providing mechanical power to an accessory drive system; and

wherein the internal combustion engine and an electric motor are selectively coupled to the torque-transmitting shaft to provide torque to the torque-transmitting shaft.

13. The apparatus of claim 12, wherein the portion of the internal combustion engine assembly is external to an engine block.

14. The apparatus of claim 12, further comprising:

an accessory power determination module structured to determine a target torque for driving the accessory drive system; and

an accessory drive selection module structured to select one of the internal combustion engine and the electric motor to provide torque to the torque-transmitting shaft in response to the target torque.

15. The apparatus of claim 14, further comprising a clutch interposed between the internal combustion engine and the electric motor;

wherein the accessory drive selection module is further structured to select the one of the internal combustion engine and the electric motor by providing a clutch command; and

wherein the clutch is responsive to the clutch command.

16. The apparatus of claim 14, wherein the accessory drive selection module is further structured to select the internal combustion engine by providing an internal combustion engine command.

17. The apparatus of claim 14, wherein the accessory drive selection module is further structured to select the electric motor by providing an electric motor command.

18. The apparatus of claim 12, wherein the internal combustion engine is a diesel engine having at least one overhead camshaft and wherein the torque-transmitting shaft extends through a through block cam bore.

19. The apparatus of claim 12, further comprising:

a rear accessory drive system operably coupled to the internal combustion engine, the internal combustion engine providing power to the rear accessory drive system.

20. A system, comprising:

an internal combustion engine having a crankshaft, the crankshaft structured to provide traction power;

means for selecting between the internal combustion engine and an electric motor to provide torque to an accessory drive system;

means for transferring torque from the internal combustion engine and the electric motor to the accessory drive system.

21. The system of claim 20, further comprising means for powering a rear accessory drive system.

22. The system of claim 20, further comprising:

means for determining a target torque required to drive the accessory drive system; and

means for providing torque to the accessory drive system in response to the target torque.

23. A method, comprising:

extending a torque-transmitting shaft through at least a portion of an engine assembly, the engine assembly having an internal combustion engine;

extending a crankshaft through the internal combustion engine;

mechanically coupling the torque-transmitting shaft to an accessory drive system;

providing torque to a load through the crankshaft; and

selectively coupling the torque-transmitting shaft to one of the internal combustion engine and an electric motor.

24. The method of claim 23, wherein the selectively coupling the torque-transmitting shaft to one of the internal combustion engine and the electric motor is further performed in response to determining a target torque required for driving the accessory drive system.

25. The method of claim 23, further comprising selectively coupling the torque-transmitting shaft to power a rear accessory drive system.