Hybrid drive for hydraulic power

• US 7,900,724 B2
• Filed: 03/20/2008
• Issued: 03/08/2011
• Est. Priority Date: 03/20/2008
• Status: Active Grant

• Current Assignee: Terex South Dakota, Inc. (Terex Corporation)
• Original Assignee: Terex-Telelect, Inc. (Terex Corporation)
• Inventors: Promersberger, Jon, Pantzke, John
• Primary Examiner(s): Shriver, II; J. Allen
• Assistant Examiner(s): Gurari; Erez
• Application Number:
  US12/052,157
• Publication Number:
  US 20090236156A1
• Time in Patent Office: 1,083 Days
• Field of Search: 604/13, 604/14, 180 531- 537
• US Class Current: 180/53.4
• CPC Class Codes: B60K 25/06 from the transmission power take-off transmissions having power-take-off B60K17/28
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: F04B 17/03 driven by electric motors
• CPC Class Codes: F04B 17/05 driven by internal-combustion engines
• CPC Class Codes: F04B 9/02 the means being mechanical
• CPC Class Codes: H01M 16/006 of fuel cells with rechargeable batteries
• CPC Class Codes: H01M 2250/20 Fuel cells in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/50 Fuel cells
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 90/40 Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

A power supply for powering a hydraulic implement includes: an electric storage unit; an electric motor, an electric generator, a hydraulic pump and a control unit; the electric motor adapted for receiving electric power and driving the hydraulic pump to power the hydraulic implement; the electric generator adapted for translating mechanical energy into the electric power; the electric storage unit also being adapted for providing the electric power; and the control unit for selecting a source of the electric power from one of the generator and the electric storage unit. A method for operating the power supply and a vehicle are also provided.

Claims

1. A power supply for powering a hydraulic implement, the power supply comprising:

an electric storage unit, an electric motor, an electric generator, a hydraulic pump and a control unit, the electric motor, the electric generator and the hydraulic pump abut against one another in direct contact;

the electric motor adapted for receiving electric power and driving the hydraulic pump to power the hydraulic implement;

the electric generator adapted for translating mechanical energy from a power take off into the electric power;

the electric storage unit also being adapted for providing the electric power; and

the control unit configured for automatically switching between electric power from the generator driven by an engine coupled to the power take off and electric power from the electric storage unit coupled to the electric motor, the electric motor driving the hydraulic pump unassisted by the engine.

2. The power supply as in claim 1, wherein the control unit is adapted for directing at least a portion of the electric power from the generator to the electric storage unit.

3. The power supply as in claim 1, wherein the control unit is adapted for automatically starting the engine to provide the mechanical energy based on the charge in the electric storage unit.

4. The power supply as in claim 3, wherein the control unit is adapted for automatically shutting down the engine based on the charge in the electric storage unit.

5. The power supply as in claim 1, further comprising an electrical connection for coupling to at least one of another separate electrical generator and an external power supply.

6. The power supply as in claim 1, wherein the electric storage unit comprises at least one of a battery and a fuel cell.

7. The power supply as in claim 1 wherein the electric generator is adapted for coupling with a power take off.

8. The power supply as in claim 1, wherein a single unit comprises the electric motor and the electric generator.

9. The power supply as in claim 1, wherein the control unit comprises at least one of a processor, a memory, a storage, an interface, a wireless interface, a remote interface, a user input device, a display, an auditory input and an audible output.

10. A method for powering a hydraulic implement, the method comprising:

driving a hydraulic pump with an electric motor, the electric motor powered by electric power from an electric storage unit, the electric motor and the hydraulic pump abut against each other in direct contact, the hydraulic pump configured for driving the electric motor;

upon depletion of the electric storage unit, starting an engine to drive a power take off unit;

driving a generator with the power take off unit; and

charging the electric storage unit and powering the hydraulic pump from the power take off unit coupled to the engine.

11. The method as in claim 10, further comprising shutting down the generator when the electric storage unit is adequately charged.

12. The method as in claim 10, further comprising continuously monitoring the depletion.

13. The method as in claim 10, further comprising at least one of tracking performance, obtaining diagnostic information and governing a setpoint for indication of at least one of depletion and adequate charge.

14. The method as in claim 10, wherein starting the generator further comprises starting at least one of the engine and a separate electrical generator.

15. A vehicle comprising at least one hydraulic system for powering a hydraulic implement, the vehicle comprising:

a hybrid power supply for powering the hydraulic system, the hybrid power supply comprising an electric storage unit;

an electric motor, an electric generator, a hydraulic pump and a control unit, the electric motor, the electric generator and the hydraulic pump abut against one another in direct contact;

the electric motor adapted for receiving electric power and driving the hydraulic pump to power the hydraulic implement;

the electric generator adapted for translating mechanical energy from a power take off of the vehicle into the electric power;

the electric storage unit also being adapted for providing the electric power; and

the control unit for automatically switching between electric power from the generator driven by an engine coupled to the power take off and electric power from the electric storage unit coupled to the electric motor, the electric motor driving the hydraulic pump unassisted by the engine.

16. The vehicle as in claim 15, wherein the hybrid power supply is adapted for at least one of assisting an engine of the vehicle and braking the vehicle.

17. A power supply for powering a hydraulic implement, the power supply comprising:

a hydraulic pump hydraulically connected to the hydraulic implement;

an electric motor/generator and the hydraulic pump abut against one another in direct contact, the electric motor/generator configured to drive the hydraulic pump;

an electric storage unit coupled to the electric motor/generator for delivery of electric power thereto for driving the hydraulic pump;

a power take-off mechanically coupled to the electric motor/generator for delivery of mechanical power thereto and generation of electric power thereby for driving the hydraulic pump; and

a control unit configured to automatically switch the operation of the electric motor/generator between electric power from the electric storage unit and mechanical power from the power-take off, wherein the electric motor/generator is configured to drive the hydraulic pump unassisted by the power take-off, the control unit is adapted for automatically shutting down the engine based on the charge in the electric storage unit.