Systems and methods for monitoring a level of hydraulic fluid in an agricultural sprayer

Patent metadata

Field	Value
Publication number	US-11951971-B2
Application number	US-202117330069-A
Country	US
Kind code	B2
Filing date	May 25, 2021
Priority date	Feb 22, 2021
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

In one aspect, a system for monitoring a level of hydraulic fluid in an agricultural sprayer includes a drive system, a hydraulic fluid system, and a fill level sensor. The system also includes a computing system communicatively coupled to both the drive system and the fill level sensor. The computing system is configured to monitor the level of hydraulic fluid within the hydraulic fluid reservoir based on data received from the fill level sensor. The computing system is further configured to detect a leak condition in the hydraulic fluid system based at least in part on the monitored level of the hydraulic fluid within the hydraulic fluid reservoir and control an operation of the drive system to reduce the ground speed of the agricultural sprayer in response to detecting the leak condition.

First claim

What is claimed is:

1. A system for monitoring a level of hydraulic fluid in an agricultural sprayer, the system comprising:
a drive system configured to control a ground speed of the agricultural sprayer;
a hydraulic fluid system having a hydraulic fluid reservoir;
a fill level sensor configured to provide data indicative of the level of hydraulic fluid within the hydraulic fluid reservoir;
a computing system communicatively coupled to both the drive system and the fill level sensor, the computing system being configured to:
monitor the level of hydraulic fluid within the hydraulic fluid reservoir based on data received from the fill level sensor;
detect a leak condition in the hydraulic fluid system based at least in part on the monitored level of the hydraulic fluid within the hydraulic fluid reservoir; and
control an operation of the drive system to reduce the ground speed of the agricultural sprayer in response to detecting the leak condition.

2. The system of claim 1 , wherein the leak condition is detected when the computing system determines that the level of hydraulic fluid within the hydraulic fluid reservoir has dropped at a first rate over a first time period that exceeds a threshold rate value.

3. The system of claim 2 , wherein the computing system is further configured to:
continue to monitor the level of the hydraulic fluid within the hydraulic fluid reservoir upon reducing the ground speed of the agricultural sprayer;
determine that the level of the hydraulic fluid within the hydraulic fluid reservoir has dropped at a second rate over a second time period that exceeds the threshold rate value; and
control the operation of the drive system to reduce the ground speed of the agricultural sprayer to zero.

4. The system of claim 1 , wherein the leak condition is detected when the computing system determines that the level of hydraulic fluid within the hydraulic fluid reservoir has dropped below a threshold level value.

5. The system of claim 1 , wherein the computing system is configured to:
control the operation of the drive system to reduce one or more engine parameters of the drive system in response to detecting the leak condition.

6. The system of claim 1 , wherein the computing system is communicatively coupled to a user interface of the agricultural sprayer.

7. The system of claim 6 , wherein the computing system is configured to provide notification instructions to the user interface when the leak condition is detected.

8. The system of claim 1 , wherein the hydraulic fluid system includes a hydraulic fluid pump disposed in fluid communication with a hydraulic fluid line, the hydraulic fluid pump configured to supply a flow of the hydraulic fluid from the hydraulic fluid reservoir to at least one hydraulic component of the agricultural sprayer.

9. The system of claim 8 , wherein the at least one hydraulic component comprises a component of the drive system.

10. The system of claim 8 , wherein the ground speed of the agricultural sprayer is proportional to a pump speed of the hydraulic fluid pump.

11. A method for monitoring a level of hydraulic fluid in an agricultural sprayer, the agricultural sprayer including a drive system, a hydraulic fluid system having a hydraulic fluid reservoir, and a fill level sensor, the method comprising:
monitoring, with a computing system, the level of hydraulic fluid within the hydraulic fluid reservoir based on data received from the fill level sensor;
detecting, with the computing system, a leak condition in the hydraulic fluid system based at least in part on the monitored level of the hydraulic fluid within the hydraulic fluid reservoir; and
controlling, with the computing system, an operation of the drive system to reduce a ground speed of the agricultural sprayer in response to detecting the leak condition.

12. The method of claim 11 , wherein detecting the leak condition comprises determining that the level of hydraulic fluid within the hydraulic fluid reservoir has dropped at a first rate over a first time period that exceeds a threshold rate value.

13. The method of claim 11 , further comprising:
continuing, with the computing system, to monitor the level of the hydraulic fluid within the hydraulic fluid reservoir after reducing the ground speed of the agricultural sprayer;
determining, with the computing system, that the level of hydraulic fluid within the hydraulic fluid reservoir has dropped at a second rate over a second time period that exceeds the threshold rate value; and
controlling the operation of the drive system to reduce the ground speed of the agricultural sprayer to zero.

14. The method of claim 11 , wherein detecting the leak condition comprises determining that the level of hydraulic fluid within the hydraulic fluid reservoir has dropped below a threshold level value.

15. The method of claim 11 , wherein controlling the operation of the drive system comprises controlling an operation of the drive system to reduce one or more engine parameters in response to detecting the leak condition.

16. The method of claim 11 , further comprising:
providing, with the computing system, notification instructions to a user interface of the agricultural sprayer when the leak condition is detected.

17. The method of claim 11 , further comprising:
controlling, with the computing system, an operation of a hydraulic fluid pump to supply a flow of the hydraulic fluid from the hydraulic fluid reservoir to at least one hydraulic component of the agricultural sprayer.

18. The method of claim 17 , further comprising:
proportionally reducing a pump speed of the hydraulic fluid pump as a result of reducing the ground speed of the agricultural sprayer.

19. The method of claim 11 , wherein reducing the ground speed comprises reducing the ground speed to between 5 miles per hour and 15 miles per hour in response to detecting the leak condition.

Assignees

• Cnh Ind America Llc

Inventors

• Hafvenstein David
• Croydon Timothy Patrick
• Greifzu John Patrick

Classifications

• B60W10/103 Primary

  of fluid type · CPC title

• A01B59/002

  Details, component parts · CPC title

• A01C23/007

  Metering or regulating systems · CPC title

• A01C23/008

  Tanks, chassis or related parts · CPC title

• A01C23/047

  Spraying of liquid fertilisers · CPC title