Distributed pump architecture for multifunctional machines

Patent metadata

Field	Value
Publication number	US-12366053-B2
Application number	US-202117922293-A
Country	US
Kind code	B2
Filing date	Apr 29, 2021
Priority date	May 1, 2020
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

At least some embodiments of the present disclosure are directed to distributed pump architectures used in control systems for multifunctional machines. In some cases, a control system for a multifunctional machine includes three or more control circuits. At least two of the control circuits each has a hydraulic fluid pump and each of the pumps is controlled by a different control circuit. At least two of the hydraulic fluid pump have different flow rates.

First claim

What is claimed is:

1. A control system for a fuel power system, comprising:
a first control circuit comprising a first pump and configured to control a first hydraulic fluid flow from the first pump to a first discrete set of one or more functional devices,
a second control circuit comprising a second pump and configured to control a second hydraulic fluid flow from the second pump to a second discrete set of one or more functional devices, and
a third control circuit comprising a third pump and a hydraulic motor and configured to control a third hydraulic fluid flow from the third pump to a third discrete set of one or more functional devices, the hydraulic motor configured to control a rotation movement,
wherein a first flow rate of the first hydraulic fluid flow is different from a second flow rate of the second hydraulic fluid flow,
wherein the first flow rate of the first hydraulic fluid flow is different from a third flow rate of the third hydraulic fluid flow, and
wherein the second flow rate of the second hydraulic fluid flow is different from the third flow rate of the third hydraulic fluid flow.

2. The control system of claim 1 , wherein the first flow rate is higher than the second flow rate and the first flow rate is higher than the third flow rate.

3. The control system of claim 1 , wherein the third flow rate is lower than the first flow rate and the third flow rate is lower than the second flow rate.

4. The control system of claim 1 , wherein the second control circuit is configured to feed the second hydraulic fluid flow from the second pump into a plurality of cylinders.

5. The control system of claim 4 , wherein the second control circuit is configured to feed the second hydraulic fluid flow from the second pump into a plurality of cylinders via a main valve.

6. The control system of claim 1 , wherein the first discrete set of one or more functional devices includes a boom cylinder of an excavator.

7. The control system of claim 1 , wherein the third discrete set of one or more functional devices includes a swing cylinder of an excavator.

8. The control system of claim 1 , wherein at least one of the first pump, the second pump, and the third pump is a variable displacement pump.

9. The control system of claim 1 , wherein the first discrete set of one or more functional devices has a first load demand and the second discrete set of one or more functional devices has a second load demand, and wherein the first load demand is higher than the second load demand.

10. The control system of claim 9 , wherein the second discrete set of one or more functional devices comprises a plurality of functional devices.

11. A control system for an electric power system, comprising:
a first control circuit comprising a first electric motor and a first pump and configured to control a first hydraulic fluid flow from the first pump to a first discrete set of one or more functional devices,
a second control circuit comprising a second electric motor and a second pump and configured to control a second hydraulic fluid flow from the second pump to a second discrete set of one or more functional devices, and
a third control circuit comprising an electric motor/generator and configured to control an electric power generated from the electric motor/generator,
wherein a first flow rate of the first hydraulic fluid flow is different from a second flow rate of the second hydraulic fluid flow.

12. The control system of claim 11 , further comprising:
an electric storage component electrically coupled to the first electric motor, the second electric motor, and the electric motor/generator,
wherein the electric storage component is configured to provide power to the first electric motor, the second electric motor, and the electric motor/generator.

13. The control system of claim 11 , wherein the electric motor/generator is configured to supply power to the electric storage component.

14. The control system of claim 11 wherein the third control circuit is configured to control a swing motor of an excavator.

15. The control system of claim 11 , wherein the first flow rate is higher than the second flow rate.

16. The control system of claim 11 , wherein the second discrete set of one or more functional devices includes a plurality of cylinders.

17. The control system of claim 16 , wherein the second control circuit is configured to feed the second hydraulic fluid flow from the second pump into a plurality of cylinders via a main valve.

18. The control system of claim 11 , wherein the first discrete set of one or more functional devices includes a boom cylinder of an excavator.

19. The control system of claim 11 , wherein the first discrete set of one or more functional devices has a first load demand and the second discrete set of one or more functional devices has a second load demand, and wherein the first load demand is higher than the second load demand.

20. The control system of claim 19 , wherein the second discrete set of one or more functional devices comprises a plurality of functional devices.

Assignees

• Cummins Inc

Inventors

• Saha Rohit

Classifications

• F15B2211/426

  electrically or electronically · CPC title

• F15B11/17

  using two or more pumps · CPC title

• E02F9/2296

  Systems with a variable displacement pump · CPC title

• E02F9/2292

  Systems with two or more pumps · CPC title

• E02F9/2217

  with energy recovery arrangements, e.g. using accumulators, flywheels · CPC title