HYDRAULIC ELECTRIC HYBRID DRIVETRAIN

• US 20110198141A1
• Filed: 02/16/2010
• Published: 08/18/2011
• Est. Priority Date: 02/16/2010
• Status: Abandoned Application

• Current Assignee: Terex South Dakota, Inc. (Terex Corporation)
• Original Assignee: Genie Industries Incorporated (Terex Corporation)
• Inventors: Case, Mark, Clark, Brian M.
• Application Number:
  US12/706,324
• Publication Number:
  US 20110198141A1
• Time in Patent Office: Days
• US Class Current: 180/65.265
• CPC Class Codes: B60K 17/356 having fluid or electric motor, for driving one or more wheels disposition of motor in, or adjacent to, traction wheel B60K7/00
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/52 Driving a plurality of drive axles, e.g. four-wheel drive
• CPC Class Codes: B60K 7/0007 the motor being electric
• CPC Class Codes: B60K 7/0015 the motor being hydraulic
• CPC Class Codes: B60L 2200/40 Working vehicles
• CPC Class Codes: B60L 50/30 using propulsion power stored mechanically, e.g. in fly-wheels
• 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 10/103 of fluid type
• 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 30/18054 at stand still, e.g. engine in idling state hill holding B60W30/18118
• CPC Class Codes: B60W 30/18127 Regenerative braking
• CPC Class Codes: B60Y 2200/41 Construction vehicles, e.g. graders, excavators
• CPC Class Codes: B66F 11/04 for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations Working platforms on fork-lift trucks B66F9/127; vehicle aspects of service vehicles B60P3/14; platforms for cleaning windows A47L3/02; devices for rescuing persons from buildings A62B1/02; liftable or lowerable platforms for use on ladders E06C7/16; maintenance travellers for bridges E01D19/10; scaffolds on an extensible sub-structure E04G1/22
• 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 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A vehicle is provided with an engine connected to a hydraulic pump in fluid communication with a hydrostatic drive system and at least one of a plurality of traction devices connected to a hydrostatic drive motor. The vehicle also has a battery coupled to an electric machine coupled to at least one of the remaining plurality of traction devices. The electric machine acts as a motor to propel the vehicle or a generator to charge the battery. A vehicle is provided with a hydraulic drive system and an electric drive system each operably connected to a fraction device. Power may be transferable from the first drive system to the second drive system by way of ground coupling between the traction devices.

Claims

1. A vehicle comprising:

an engine operably connected to a hydraulic pump, the hydraulic pump in fluid communication with a hydrostatic drive system;

a plurality of traction devices, wherein at least one of the devices is operably connected to a hydrostatic drive motor of the hydrostatic drive system; and

an electric machine operably coupled to at least one of the remaining plurality of traction devices, the electric machine electrically coupled to a battery, the electric machine operable as a motor to output mechanical power to said traction device, and operable as a generator to output electrical power to the battery;

wherein the fraction devices support the vehicle upon a support surface.

2. The vehicle of claim 1 further comprising a system of hydraulic valves and actuators in fluid communication with the hydraulic pump to receive pressurized fluid therefrom and perform a function.

3. The vehicle of claim 1 further comprising a second hydrostatic drive motor operably connected to another one of the remaining plurality of traction devices, wherein the second hydrostatic drive motor is in fluid communication with the hydraulic pump to receive pressurized fluid therefrom.

4. The vehicle of claim 3 further comprising a second electric machine operably coupled another one of the remaining plurality of traction devices, the second electric machine electrically coupled to the battery, the electric machine operable as a motor to output mechanical power to said traction device, and operable as a generator to output electrical power to the battery.

5. The vehicle of claim 1 wherein the engine is operated within a desired output range by using the electric machines as one of motors and generators to stabilize the engine output.

6. The vehicle of claim 1, further comprising a charger configured to output power from an external electric power supply to the battery.

7. The vehicle of claim 1 further comprising a second hydraulic pump operatively coupled to the engine, the second hydraulic pump in fluid communication with a system of hydraulic valves and actuators to supply pressurized fluid thereto.

8. The vehicle of claim 1 operable in a first operating mode, wherein the engine is configured to power the hydraulic pump, thereby supplying pressurized fluid to the hydrostatic drive motor and driving the traction device connected to the hydrostatic drive motor to propel the vehicle across the support surface, and wherein the traction device coupled to the electric machine interacts with the support surface to power the electric machine as a generator to output electrical power to the battery.

9. The vehicle of claim 1 operable in a second operating mode, wherein the engine is configured to power the hydraulic pump, thereby supplying pressurized fluid to the hydrostatic drive motor and driving the traction device connected to the hydrostatic drive motor to propel the vehicle across the support surface, and wherein the battery is configured to power the electric machine as a motor to drive the traction device coupled to the first electric machine and additionally propel the vehicle across the support surface.

10. The vehicle of claim 1 operable in a third operating mode to propel the vehicle, wherein the electric machine is configured to act as a motor and uses battery power to drive the traction device coupled to the electric machine to propel the vehicle across the support surface;

and

wherein the vehicle is configured to operate using electricity with the engine inoperative.

11. The vehicle of claim 1 operable in a fourth operating mode wherein the engine is configured to power the hydraulic pump, thereby supplying pressurized fluid to the hydrostatic drive motor and driving the traction device connected to the hydrostatic drive motor to propel the vehicle across the support surface, and

wherein the electric machine is configured to freewheel.

12. The vehicle of claim 7 further comprising a fifth operating mode wherein the engine is configured to power the second hydraulic pump, thereby supplying pressurized fluid to the system of hydraulic valves and actuators to perform an function.

13. The vehicle of claim 1 further comprising a second battery operably connected to an engine starting circuit.

14. A vehicle comprising:

an engine connected to a hydraulic pump, the hydraulic pump in fluid communication with a first and second hydrostatic drive motor to supply pressurized fluid thereto;

a first pair of traction devices, each traction device operably connected to one of the hydrostatic drive motors;

a first and second electric machine electrically coupled to a battery, each electric machine operable as a motor to output mechanical power, and operable as a generator to output electrical power to the battery;

a second pair of traction devices, each traction device operably connected to one of the electric machines;

wherein the traction devices support the vehicle upon the support surface.

15. The vehicle of claim 14 wherein the first and second electric machines were configured on the vehicle during a retrofitting process on an existing hydraulic vehicle.

16. A vehicle comprising:

a hydraulic drive system having an engine connected to a hydraulic pump in fluid communication with at least one hydrostatic drive motor to provide pressurized fluid thereto, the hydrostatic drive motor operable coupled to a first traction device; and

an electric drive system having at least one electric machine electrically coupled to a battery, the electric machine operable as a motor to output mechanical power, and operable as a generator to output electrical power to the battery, the electric machine operably coupled to a second traction device;

wherein the first and second traction devices support the vehicle on a support surface.

17. The vehicle of claim 16 wherein power is transferable from the hydraulic drive system to the electric drive system by way of a ground coupling between the first and second traction devices.

18. The vehicle of claim 17 further comprising a system of hydraulic valves and actuators in fluid communication with the first hydraulic drive system.

19. The vehicle of claim 17 operable in a first operating mode, wherein the first hydraulic drive system is configured to propel the vehicle across the support surface, and wherein the second electric drive system is configured to output electrical power to the battery.

20. The vehicle of claim 17 operable in a second operating mode, wherein the first hydraulic drive system is configured to propel the vehicle across the support surface, and wherein the second electric drive system is configured to additionally propel the vehicle across the support surface.