Systems and methods for grouping hydraulic functions for an agricultural implement

Patent metadata

Field	Value
Publication number	US-12313092-B2
Application number	US-202318222137-A
Country	US
Kind code	B2
Filing date	Jul 14, 2023
Priority date	Jul 14, 2023
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A method for grouping hydraulic functions associated with an agricultural implement includes accessing parameter data associated with hydraulic fluid used to drive a plurality of hydraulic functions of the implement, the hydraulic fluid being supplied from one of at least two pumps. The method also includes determining delivery pump pressures for the pumps for each of a plurality of different pump/function combinations based at least in part on the hydraulic parameter data and determining a power parameter requirement for the pumps for each of the different pump/function combinations based at least in part on the delivery pump pressures. In addition, the method includes selecting a desired pump/function combination based at least in part on the power parameter requirement, and controlling an operation of a plurality of switching valves such that the hydraulic fluid is supplied for driving the hydraulic functions in accordance with the desired pump/function combination.

First claim

What is claimed is:

1. A method for grouping hydraulic functions associated with an agricultural implement, the method comprising:
accessing, with a computing system, hydraulic parameter data associated with hydraulic fluid used to drive a plurality of hydraulic functions of the agricultural implement, the hydraulic fluid driving each hydraulic function of the plurality of hydraulic functions being supplied from one of at least two pumps;
determining, with the computing system, delivery pump pressures for the at least two pumps for each of a plurality of different pump/function combinations based at least in part on the hydraulic parameter data;
determining, with the computing system, a power parameter requirement for the at least two pumps for each of the plurality of different pump/function combinations based at least in part on the delivery pump pressures;
selecting, with the computing system, a desired pump/function combination of the plurality of different pump/function combinations based at least in part on the power parameter requirement; and
controlling, with the computing system, an operation of a plurality of switching valves such that the hydraulic fluid is supplied for driving the plurality of hydraulic functions in accordance with the desired pump/function combination, wherein each of the plurality of switching valves is configured to control which of the at least two pumps supplies the hydraulic fluid for driving a respective hydraulic function of the plurality of hydraulic functions.

2. The method of claim 1 , wherein accessing the hydraulic parameter data comprises accessing pressure data and flow rate data associated with the hydraulic fluid being supplied to drive the plurality of hydraulic functions.

3. The method of claim 1 , further comprising controlling an operation of the at least two pumps based on the delivery pump pressures associated with the desired pump/function combination.

4. The method of claim 1 , wherein the at least two pumps comprises a first pump and a second pump and wherein determining the anticipated delivery pump pressures comprises, for each respective pump/function combination of the plurality of different pump/function combinations:
determining a first maximum pressure for a first group of hydraulic functions of the plurality hydraulic functions associated with the first pump for the respective pump/function combination and a second maximum pressure for a second group of hydraulic functions of the plurality of hydraulic functions associated with the second pump for the respective pump/function combination;
determining a first pressure margin for the first pump to supply the hydraulic fluid to drive the first group of hydraulic functions and a second pressure margin for the second pump to supply the hydraulic fluid to drive the second group of hydraulic functions; and
determining a first delivery pump pressure for the first pump based on the first maximum pressure and the first pressure margin and a second delivery pump pressure for the second pump based on the second maximum pressure and the second pressure margin.

5. The method of claim 4 , wherein determining the first and second pressure margins comprises:
determining a first flow rate requirement for the first group of hydraulic functions;
determining a second flow rate requirement for the second group of hydraulic functions; and
determining the first pressure margin as a function of the first flow rate requirement and second pressure margin as a function of the second flow rate requirement.

6. The method of claim 1 , wherein the at least two pumps comprises a first pump and a second pump and wherein determining the power parameter requirement comprises, for each respective pump/function combination of the plurality of different pump/function combinations:
determining a first torque requirement for the first pump based at least in part on the delivery pump pressure for the first pump;
determining a second torque requirement for the second pump based at least in part on the delivery pump pressure for the second pump; and
determining the power parameter requirement based on the first and second torque requirements.

7. The method of claim 1 , wherein selecting the desired pump/function combination comprises:
identifying which pump/function combination of the plurality of different pump/function combinations is associated with a lowest power parameter requirement; and
selecting the pump/function combination with the lowest power parameter requirement as the desired pump/function combination.

8. The method of claim 1 , further comprising determining whether any of the at least two pumps will experience flow saturation while supplying the hydraulic fluid to drive the plurality of hydraulic functions in accordance with the desired pump/function combination.

9. The method of claim 8 , further comprising, when it is determined that one of the at least two pumps will experience flow saturation, selecting a new desired pump/function combination of the plurality of different pump/function combinations based at least in part on the power parameter requirement.

10. The method of claim 1 , further comprising comparing the power parameter requirement for the desired pump/function combination to a power parameter requirement associated with maintaining a previously implemented pump/function combination of the plurality of different pump/function combinations,
wherein controlling the operation of the plurality of switching valves comprises controlling the operation of the plurality of switching valves such that the hydraulic fluid is supplied to drive the plurality of hydraulic functions in accordance with the desired pump/function combination only when the power parameter requirement for the desired pump/function exceeds the power parameter requirement associated with maintaining the previously implemented pump/function combination by a threshold amount.

11. A system for grouping hydraulic functions associated with agricultural implements, the system comprising:
an agricultural implement configured to execute a plurality of hydraulic functions;
a work vehicle configured to tow the agricultural implement and supporting a hydraulic sub-system, the hydraulic sub-system including at least two pumps configured to supply pressurized hydraulic fluid and a plurality of valve assemblies, each valve assembly of the plurality of valve assemblies being configured to regulate the supply of the pressurized hydraulic fluid used to drive a respective hydraulic function of the plurality of functions, the hydraulic sub-system further including a plurality of switching valves, with each of the plurality of switching valves being configured to control which of the at least two pumps supplies the pressurized hydraulic fluid to a respective valve assembly of the plurality of valve assemblies; and
a computing system provided in association with at least one of the work vehicle or the agricultural implement, the computing system being configured to:
access hydraulic parameter data associated with the pressurized hydraulic fluid used to drive the plurality of hydraulic functions of the agricultural implement;
determine delivery pump pressures for the at least two pumps for each of a plurality of different pump/function combinations based at least in part on the hydraulic parameter data;
determine a power parameter requirement for the at least two pumps for each of the plurality of different pump/function combinations based at least in part on the delivery pump pressures;
select a desired pump/function combination of the plurality of different pump/function combinations based at least in part on the power parameter require

Assignees

• Cnh Ind Italia Spa
• Cnh Ind America Llc

Inventors

• Pintore Francesco
• Fiorati Stefano
• Vacca Andrea
• Tian Xin

Classifications

• F15B13/022

  Flow-dividers; Priority valves · CPC title

• E02F9/2239

  using two or more pumps with cross-assistance · CPC title

• F15B11/163

  for sharing the pump output equally amongst users or groups of users, e.g. using anti-saturation, pressure compensation · CPC title

• F15B13/02

  Fluid distribution or supply devices characterised by their adaptation to the control of servomotors · CPC title

• A01C19/00

  Arrangements for driving working parts of fertilisers or seeders {(A01C17/005 takes precedence)} · CPC title