Refuse vehicle

Patent metadata

Field	Value
Publication number	US-11926474-B2
Application number	US-202117530715-A
Country	US
Kind code	B2
Filing date	Nov 19, 2021
Priority date	Nov 24, 2020
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

A refuse vehicle includes a body defining a storage compartment, a packer, a hydraulic system, a pressure sensor, and a controller. The hydraulic system includes a first pump and a second pump are configured to supply fluid power to a packer actuator. The packer actuator is coupled to the packer and the body and is positioned to move the packer to compact refuse within the storage compartment. The pressure sensor indicates a measured pressure a first fluid associated with the first pump or a second fluid associated with the second pump. The controller is configured to control the hydraulic system to supply fluid power to the packer actuator to move the packer. The controller is further configured to determine that (a) one or more other vehicle functions are active or (b) the measured pressure exceeds a threshold pressure. The controller is further configured to reduce the fluid power supplied to the packer actuator in response to the determination.

First claim

What is claimed is:

1. A refuse vehicle comprising:
a body defining a storage compartment;
a packer coupled to the body;
a hydraulic system comprising a first pump, a second pump, and a packer actuator, the first pump and the second pump configured to supply fluid power to the packer actuator and to one or more components of the refuse vehicle that are configured to perform one or more other vehicle functions, wherein the packer actuator is coupled to the packer and the body and positioned to move the packer in a compacting direction to compact refuse within the storage compartment;
a pressure sensor fluidly coupled to the packer actuator and configured to indicate a measured pressure of at least one of a first fluid associated with the first pump or a second fluid associated with the second pump; and
a controller operatively coupled to the packer actuator, the hydraulic system, and the pressure sensor and configured to:
control the hydraulic system to supply fluid power to the packer actuator such that the packer actuator moves the packer, at a first rate, in the compacting direction;
determine that (a) the one or more other vehicle functions are active and (b) the measured pressure exceeds a threshold pressure; and
reduce, with the packer in a partially extended position, the fluid power supplied to the packer actuator while maintaining an amount of fluid power supplied to the one or more components, to adjust a load applied to at least one of the first pump or the second pump, wherein the fluid power provided to the packer actuator is reduced by an amount such that the packer actuator moves the packer, at a second rate, in the compacting direction without impacting a performance of the one or more components;
wherein a determination that (c) the one or more other vehicle functions are inactive or (d) the measured pressure is less than the threshold pressures results in an increase to the fluid power supplied to the packer actuator.

2. The refuse vehicle of claim 1 , wherein the first pump is fluidly coupled to one of a grabber arm actuator, a lift arm actuator, or a fork actuator, wherein the one or more other vehicle functions are associated with the grabber arm actuator, the lift arm actuator, or the fork actuator.

3. The refuse vehicle of claim 1 , wherein the first pump configured to supply the first fluid to the packer actuator, the second pump configured to supply the second fluid to the packer actuator and wherein reducing the fluid power to the packer actuator comprises reducing one of (a) a pressure of the first fluid or (b) a flow rate of the first fluid.

4. The refuse vehicle of claim 3 , wherein the pressure of the first fluid is reduced by actuating a displacement actuator of the first pump.

5. The refuse vehicle of claim 1 , wherein the first pump configured to supply the first fluid to the packer actuator, the second pump configured to supply the second fluid to the packer actuator and wherein reducing the fluid power to the packer actuator comprises preventing flow of the first fluid to the packer actuator.

6. The refuse vehicle of claim 1 , wherein the threshold pressure is based on a mode of operation of the refuse vehicle.

7. The refuse vehicle of claim 1 , wherein the controller is further configured to:
determine that the packer actuator is fully extended; and
control the hydraulic system to supply fluid power to the packer actuator such that the packer actuator moves the packer in a retracting direction.

8. A refuse packing system, comprising:
a packer coupled to a body, wherein the body defines a storage compartment;
a hydraulic system comprising a first pump, a second pump, and a packer actuator, the first pump and the second pump configured to supply fluid power to the packer actuator and to one or more components of the refuse vehicle that are configured to perform one or more other vehicle functions, wherein the packer actuator is coupled to the packer and the body and positioned to move the packer in a first direction;
a pressure sensor fluidly coupled to the packer actuator and configured to indicate a measured pressure of at least one of a first fluid associated with the first pump or a second fluid associated with the second pump; and
a controller operatively coupled to the packer actuator, the hydraulic system, and the pressure sensor and configured to:
control the hydraulic system to supply fluid power to the packer actuator such that the packer actuator moves the packer, at a first rate, in the first direction;
determine that (a) the one or more other vehicle functions are active and (b) the measured pressure exceeds a threshold pressure; and
reduce, with the packer in a partially extended position, the fluid power supplied to the packer actuator while maintaining an amount of fluid power supplied to the one or more components, to adjust a load applied to at least one of the first pump or the second pump, wherein the fluid power provided to the packer actuator is reduced by an amount such that the packer actuator moves the packer, at a second rate, in the first direction without impacting a performance of the one or more components;
wherein a determination that (c) the one or more other vehicle functions are inactive or (d) the measured pressure is less than the threshold pressures results in an increase to the fluid power supplied to the packer actuator.

9. The refuse packing system of claim 8 , wherein the first pump is fluidly coupled to one of a grabber arm actuator, a lift arm actuator, or a fork actuator, wherein the one or more other vehicle functions are associated with the grabber arm actuator, the lift arm actuator, or the fork actuator.

10. The refuse packing system of claim 8 , wherein the first pump configured to supply the first fluid to the packer actuator, the second pump configured to supply the second fluid to the packer actuator and wherein reducing the fluid power to the packer actuator comprises reducing one of (a) a pressure of the first fluid or (b) a flow rate of the first fluid.

11. The refuse packing system of claim 10 , wherein the pressure of the first fluid is reduced by actuating a displacement actuator of the first pump.

12. The refuse packing system of claim 8 , wherein the first pump configured to supply the first fluid to the packer actuator, the second pump configured to supply the second fluid to the packer actuator and wherein reducing the fluid power to the packer actuator comprises preventing flow of the first fluid to the packer actuator.

13. The refuse packing system of claim 8 , wherein the threshold pressure is based on a mode of operation of the refuse vehicle.

14. The refuse packing system of claim 8 , wherein the controller is further configured to:
determine that the packer actuator is fully extended; and
control the hydraulic system to supply fluid power to the packer actuator such that the packer actuator moves the packer in a retracting direction.

Assignees

• Oshkosh Corp

Inventors

• Turner Ross
• Nelson Joseph

Classifications

• B65F3/06 Primary

  Arrangement and disposition of fluid actuators · CPC title

• B65F3/041

  Pivoted arms or pivoted carriers · CPC title

• B65F2003/023

  Gripper arms for embracing the receptacle · CPC title

• B65F2003/0279

  the discharging means mounted at the front of the vehicle · CPC title

• B65F3/10 Primary

  Arrangement and disposition of fluid actuators · CPC title