HYBRID DRIVE FOR HYDRAULIC POWER

• US 20090236156A1
• Filed: 03/20/2008
• Published: 09/24/2009
• 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
• Granted Patent: US 7,900,724 B2
• Time in Patent Office: Days
• US Class Current: 180/53.400
• 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 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 selecting a source of the electric power from one of the generator and the electric storage unit.

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 starting an engine to provide the mechanical energy.

4. The power supply as in claim 3, wherein the control unit is adapted for shutting down the engine.

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;

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 electric motor from the generator.

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 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 selecting a source of the electric power from one of the generator and the electric storage unit.

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. The vehicle as in claim 15, further comprising at least one separate electrical generator for powering the generator of the hybrid power supply.