Self-adjusting PTO clutch engagement method based on real-time inertial load estimation
AssigneeCNH Industrial America LLC
InventorsKushan Vora, Haibo Guo, Brian Allen Hartman
Life of this patent
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Abstract
A method for controlling PTO clutch engagement includes determining a first change in clutch speed based on an inertial load of a PTO implement. The method also includes determining a second change in clutch speed based on a threshold amount of energy of a PTO clutch. The method further includes determining a third change in clutch speed between the first change in clutch speed and the second change in clutch speed. The method also includes adjusting a clutch current based on the third change in clutch speed.
Claims20
A system of a work vehicle, comprising:
- a power takeoff (PTO) system comprising:
- a PTO clutch comprising a clutch control solenoid valve configured to regulate supply of hydraulic fluid to the PTO clutch and control engagement and disengagement of the PTO clutch based on a clutch current;
- and
- a PTO output shaft coupled to the PTO clutch, wherein the PTO output shaft, in operation, is coupled to and drives a PTO implement;
- and
- a controller comprising clutch control logic communicatively coupled to the PTO clutch, wherein the clutch control logic, in operation:
- determines a first threshold change in clutch speed based on an inertial load of the PTO implement;
- determines a second threshold change in clutch speed based on a threshold amount of energy absorbed by the PTO clutch;
- determines a change in clutch speed between the first threshold change in clutch speed and the second threshold change in clutch speed;
- and
- adjusts the clutch current based on the change in clutch speed.
A tangible, non-transitory, machine-readable-medium, comprising machine-readable instructions to:
- determine a first threshold change in clutch speed based on inertial load of a power takeoff (PTO) implement of a work vehicle;
- determine a second threshold change in clutch speed based on a threshold amount of energy absorbed by a PTO clutch of the work vehicle;
- determine a change in clutch speed between the first threshold change in clutch speed and the second threshold change in clutch speed;
- and
- adjust a clutch current based on the change in clutch speed.
A method for controlling power takeoff (PTO) clutch engagement, comprising:
- determining a first threshold change in clutch speed based on an inertial load of a PTO implement;
- determining a second threshold change in clutch speed based on a threshold amount of energy of a PTO clutch;
- determining a change in clutch speed between the first threshold change in clutch speed and the second threshold change in clutch speed;
- and
- adjusting a clutch current based on the change in clutch speed.
Dependencies are inferred from the claim text.