Work vehicle with improved bi-directional self-leveling functionality and related systems and methods
AssigneeCNH Industrial America LLC
InventorsDuqiang Wu, Aditya Singh, Navneet Gulati
Life of this patent
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Abstract
A method for automatically adjusting the position of an implement of a lift assembly of a work vehicle includes determining a tilt transition boom angle for the lift assembly, determining a closed-loop control signal associated with controlling movement of the implement based at least in part on the tilt transition boom angle, generating a valve command signal based at least in part on the closed-loop control signal, and controlling an operation of at least one valve associated with the implement based at least in part on the valve command signal to maintain the implement at a target implement angle as a boom of the lift assembly is being moved across a boom travel range.
Claims20
A method for automatically adjusting the position of an implement of a lift assembly of a work vehicle, the lift assembly comprising a boom coupled to the implement, the method comprising:
- determining, with the computing system, a tilt transition boom angle for the lift assembly that corresponds to a position within a boom travel range of the boom at which a direction of movement of the implement must be reversed to maintain the implement at a target implement angle as the boom is being moved across such position;
- determining, with the computing system, a closed-loop control signal associated with controlling movement of the implement based at least in part on the tilt transition boom angle;
- generating, with the computing system, a valve command signal based at least in part on the closed-loop control signal;
- and
- controlling, with computing system, an operation of at least one valve associated with the implement based at least in part on the valve command signal to maintain the implement at the target implement angle as the boom is being moved across the boom travel range.
A system for controlling the operation of a work vehicle, the system comprising:
- a lift assembly including a boom and an implement coupled to the boom;
- at least one tilt valve in fluid communication with a corresponding tilt cylinder, the at least one tilt valve being configured to control a supply of hydraulic fluid to the tilt cylinder to adjust a position of the implement relative to the boom;
- a computing system communicatively coupled to the at least one tilt valve, the computing system being configured to:
- receive an input indicative of a target implement angle at which the implement is to be maintained as the boom is being moved across a boom travel range of the boom;
- determine a tilt transition boom angle for the lift assembly based at least in part on the target implement angle, the tilt transition boom angle corresponding to a position within the boom travel range at which the tilt cylinder must transition between being stroked and de-stroked in order to maintain the implement at the target implement angle as the boom is being moved across such position;
- determine a closed-loop control signal associated with controlling movement of the implement based at least in part on the tilt transition boom angle;
- generate a valve command signal based at least in part on the closed-loop control signal;
- and
- control an operation of the at least one tilt valve based at least in part on the valve command signal to maintain the implement at the target implement angle as the boom is being moved across the boom travel range.
Dependencies are inferred from the claim text.