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AssigneeDeere & Company
InventorsJustin Sticksel, Aaron R. Kenkel, Jeffery Dobchuk, Bryan J. Rausch, Madeline T. Oglesby
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A work machine and method for a work machine with an open center hydraulic system for controlling actuation of an implement includes an implement control valve, an electro-hydraulically controlled pump, a hydraulic circuit coupled to the implement actuator, and a pressure transducer positioned for measuring a pressure in the hydraulic circuit between the pump and the implement control valve. A calibration system for calibrating the pump includes a controller having a non-transitory computer readable medium having a program instruction for causing a processor to calibrate a first pump threshold for the pump in a pump-flow curve wherein the first pump threshold including a minimum pump control signal to actuate the pump; determine a hysteresis band in the pump-flow curve; and calibrate a second pump threshold for the pump in the pump-flow curve wherein the second pump threshold including a maximum pump control signal to actuate the pump below a relief setpoint.
A work machine with an open center hydraulic system for actuating an implement coupled to the work machine, the work machine comprising:
A computer readable medium for calibrating an electro-hydraulically controlled pump on a work machine with an open center hydraulic system for actuating an implement coupled to the work machine, the open center hydraulic system including an implement control valve configured to control a flow ratio of a fluid through a hydraulic circuit between a reservoir and an implement actuator in response to a valve control signal, the pump for controlling an outlet flow of the fluid through the hydraulic circuit in response to a pump control signal, a pressure transducer positioned for measuring a flow pressure in the hydraulic circuit between the pump and the implement control valve, the computer readable medium comprising a program instruction for causing a processor of a controller to:
A method of calibrating an electro-hydraulically controlled pump on a work machine with an open center hydraulic system for actuating an implement coupled to the work machine, the open center hydraulic system including an implement control valve configured to control a flow ratio of a fluid through a hydraulic circuit between a reservoir and an implement actuator in response to a valve control signal, the pump for controlling an outlet flow of the fluid through the hydraulic circuit in response to a pump control signal, a pressure transducer positioned for measuring a flow pressure in the hydraulic circuit between the pump and the implement control valve, the method comprising:
Dependencies are inferred from the claim text.