System and method for recovering energy in a machine

• US 9,719,498 B2
• Filed: 05/29/2015
• Issued: 08/01/2017
• Est. Priority Date: 05/29/2015
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Ge, Xinyu
• Primary Examiner(s): Dolak, James M
• Application Number:
  US14/724,960
• Publication Number:
  US 20160348653A1
• Time in Patent Office: 795 Days
• CPC Class Codes: B60G 13/14 having dampers accumulating utilisable energy, e.g. compressing air fluid springs with an accumulator B60G11/30
• CPC Class Codes: B60G 2300/60 Vehicles using regenerative power
• CPC Class Codes: E02F 3/437 providing automatic sequences of movements, e.g. linear excavation, keeping dipper angle constant
• CPC Class Codes: E02F 9/2207 for reducing or compensating oscillations
• CPC Class Codes: E02F 9/2217 with energy recovery arrangements, e.g. using accumulators, flywheels
• CPC Class Codes: F03G 7/08 recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine

Abstract

An energy recovery system for a first machine includes a cylinder member, and a piston slidably disposed in the cylinder member and operatively coupled to a frame of the first machine. The piston and the cylinder member together define a chamber configured to receive a hydraulic fluid. The energy recovery system includes an accumulator in fluid communication with the chamber and a first valve assembly for regulating a flow of the hydraulic fluid from the chamber to the accumulator. The energy recovery system includes a controller configured to receive a signal indicative of a parameter of a payload that is to be received from a second machine during a work cycle thereof. The controller is configured to control the first valve assembly, during the work cycle of the second machine, to at least partially open the fluid communication between the chamber and the accumulator based on the received signal.

Claims

1. An energy recovery system for a first machine in communication with a second machine, the energy recovery system comprising:

a cylinder assembly comprising;

a cylinder member; and

a piston slidably disposed in the cylinder member, the piston operatively coupled to a frame of the first machine, wherein the piston and the cylinder member together defines a chamber receiving a hydraulic fluid therein;

an accumulator disposed in fluid communication with the chamber to receive the hydraulic fluid, wherein the accumulator stores a pressurized hydraulic fluid therein;

a first valve assembly disposed in fluid communication with the accumulator and the chamber, the first valve assembly regulating a flow of the hydraulic fluid from the chamber to the accumulator; and

a controller configured to communicate with the second machine and control the first valve assembly, the controller configured to;

receive a signal indicative of a parameter of a payload that is to be received by the first machine from the second machine during a work cycle of the second machine; and

control the first valve assembly, during the work cycle of the second machine, to at least partially open the fluid communication between the chamber and the accumulator based on the received signal,

wherein an amount of opening of the fluid communication is based on the parameter of the payload.

2. The energy recovery system of claim 1 further comprising a fluid reservoir that supplies the hydraulic fluid to the chamber, wherein the first valve assembly regulates a flow of the hydraulic fluid between the fluid reservoir and the chamber.

3. The energy recovery system of claim 2, wherein the chamber defines a first orifice disposed in fluid communication with the first valve assembly.

4. The energy recovery system of claim 3 further comprising a second valve assembly disposed in communication with the chamber and the fluid reservoir, the second valve assembly configured to regulate a flow of the hydraulic fluid from the chamber to the fluid reservoir.

5. The energy recovery system of claim 4, wherein the chamber further defines a second orifice disposed adjacent to the first orifice, wherein the second orifice is configured to fluidly communicate the chamber with the second valve assembly.

6. The energy recovery system of claim 5, wherein the controller is further configured to control the second valve assembly to restrict the fluid communication between the chamber and the fluid reservoir during the work cycle of the second machine.

7. The energy recovery system of claim 5, wherein a diameter of the first orifice is greater than a diameter of the second orifice.

8. The energy recovery system of claim 1, wherein the controller is configured to receive the signal via a wireless network between the first machine and the second machine.

9. The energy recovery system of claim 1 further comprising a hydraulic motor in fluid communication with the accumulator to receive the pressurized hydraulic fluid, wherein the hydraulic motor is driven by the pressurized hydraulic fluid.

10. A machine system comprising:

a first machine; and

a second machine in communication with the first machine, the second machine providing a payload to the first machine during a work cycle of the second machine,

wherein the first machine comprises;

a frame; and

an energy recovery system comprising;

a cylinder assembly comprising;

a cylinder member; and

a piston slidably disposed in the cylinder member, the piston operatively coupled to the frame of the first machine, wherein the piston and the cylinder member together define a chamber receiving a hydraulic fluid therein;

an accumulator disposed in fluid communication with the chamber to receive the hydraulic fluid, wherein the accumulator stores the pressurized hydraulic fluid;

a first valve assembly disposed in fluid communication with the accumulator and the chamber, the first valve assembly regulating a flow of the hydraulic fluid from the chamber to the accumulator; and

a controller configured to be in communication with the second machine and control the first valve assembly, the controller configured to;

receive a signal indicative of a parameter of a payload that is to be received by the first machine from the second machine during a work cycle of the second machine; and

control the first valve assembly, during the work cycle of the second machine, to at least partially open the fluid communication between the chamber and the accumulator based on the received signal,

wherein an amount of opening of the fluid communication is based on the parameter of the payload.

11. The machine system of claim 10, wherein the energy recovery system further comprises a fluid reservoir supplying the hydraulic fluid to the chamber, wherein the first valve assembly regulates a flow of the hydraulic fluid between the fluid reservoir and the chamber.

12. The machine system of claim 11, wherein the chamber defines a first orifice disposed in fluid communication with the first valve assembly.

13. The machine system of claim 12, wherein the energy recovery system further comprises a second valve assembly disposed in communication with the chamber and the fluid reservoir, the second valve assembly regulates a flow of the hydraulic fluid from the chamber to the fluid reservoir.

14. The machine system of claim 13, wherein the chamber further defines at least one second orifice disposed adjacent to the first orifice, wherein the at least one second orifice is configured to fluidly communicate the chamber with the second valve assembly.

15. The machine system of claim 13, wherein the controller is further configured to control the second valve assembly to restrict the fluid communication between the chamber and the fluid reservoir during the work cycle of the second machine.

16. The machine system of claim 13, wherein a diameter of the first orifice is greater than a diameter of the second orifice.

17. The machine system of claim 10, wherein the second machine includes a control module communicably coupled to the controller via a communication network.