OPEN-CENTER HYDRAULIC SYSTEM WITH MACHINE INFORMATION-BASED FLOW CONTROL

摘要

A work vehicle is provided including at least one work tool and an open-center hydraulic circuit that supplies hydraulic fluid to operate the at least one work tool. The hydraulic circuit includes a variable displacement pump and a controller in electrical communication with the pump, the controller receiving an electrical input from the work vehicle to control the flow of hydraulic fluid from the pump.

主权项

1. A work vehicle including:
a chassis; a plurality of traction devices positioned to support the chassis on the ground; a power source; a variable displacement pump that is driven by the power source to supply hydraulic fluid; a pump control valve operably coupled to the pump and configured to adjust the displacement of the pump; at least one work tool moveably coupled to the chassis; at least one hydraulic actuator configured to move the at least one work tool relative to the chassis; an open-center actuator control valve in communication with the pump and the at least one hydraulic actuator, the open-center actuator control valve directing hydraulic fluid away from the at least one hydraulic actuator when in a neutral position and directing hydraulic fluid to the at least one hydraulic actuator when in an actuated position to move the at least one work tool relative to the chassis; and a controller in electrical communication with the pump control valve, the controller receiving an electrical input from the work vehicle and sending an electrical control signal to the pump control valve based on the electrical input to adjust the flow rate of hydraulic fluid supplied to the open-center actuator control valve.