Pressurized fluid supply system for an agricultural vehicle
AssigneeAGCO International GmbH
InventorGabriel Reitemann
Life of this patent
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Abstract
In a hydraulic system, such as for a tractor or other agricultural vehicle, a main supply pump supplies fluid to a steering system through a steering circuit and a second pump supplies fluid to a cooling fan motor. The second pump is connected with the steering circuit to provide a second a source of fluid to the steering system when the main supply pump is unable to meet demand. A prioritization valve regulates the flow of fluid from the second pump to the motor. The second pump acts as a secondary pump for the steering system and drives a cooling fan.
Claims20
A pressurized fluid supply system for an agricultural vehicle, the system comprising:
- a main supply pump configured to provide a first source of pressurized fluid to a steering system of the vehicle through a steering circuit and to other consumers through a main circuit;
- a cooling fan pump configured to provide a source of pressurized fluid to a cooling fan motor driving a cooling fan through a cooling fan circuit;
- and
- a prioritization valve configured to regulate flow of fluid from the cooling fan pump to the cooling fan motor, the prioritization valve having at least two operative configurations and movable between the at least two operative configurations in dependence on a fluid pressure in the steering circuit;
- wherein the cooling fan pump is fluidly connectable with the steering circuit to provide a second a source of pressurized fluid to the steering system;
- wherein the prioritization valve is configured to adopt a first operative configuration in which fluid flow from the cooling fan pump to the cooling fan motor through the prioritization valve is substantially unrestricted when the fluid pressure in the steering circuit is at or above a first threshold value and to adopt a second operative configuration in which fluid flow from the cooling fan pump to the cooling fan motor through the prioritization valve is at least partially restricted when the fluid pressure in the steering circuit is below the first threshold value.
Dependencies are inferred from the claim text.