Method for controlling a hydraulic cylinder in a work machine
AssigneeVolvo Construction Equipment AB
InventorsBo Vigholm, Markku Palo
Life of this patent
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Abstract
A method is provided for controlling a hydraulic cylinder in a work machine, which hydraulic cylinder is arranged to move an implement in relation to a part of a vehicle, with the hydraulic cylinder being controlled by a hydraulic machine. The method includes the steps of detecting initiation of a movement of the implement that is such that the piston of the hydraulic cylinder is moved in a first direction, of driving the hydraulic machine in a first rotational direction, prior to the movement of the implement taking place, so that a line from the hydraulic machine is pressurized, which line is arranged to connect the hydraulic machine to the side of the cylinder toward which the piston will be moved during the movement of the implement.
Claims14
A method for controlling a hydraulic cylinder in a work machine, which hydraulic cylinder is arranged to move an implement in relation to a part of a vehicle, with the hydraulic cylinder being controlled by a hydraulic machine, comprising
- detecting initiation of a movement of the implement that is such that a piston in the hydraulic cylinder is moved in a first direction,
- driving the hydraulic machine through a predetermined angle in a first rotational direction, prior to the movement of the implement taking place, so that a line from the hydraulic machine is pressurized, which line is arranged to connect the hydraulic machine to the side of the cylinder toward which the piston will be moved during the movement of the implement.
A method for controlling a hydraulic cylinder in a work machine, which hydraulic cylinder is arranged to move an implement in relation to a part of a vehicle, with the hydraulic cylinder being controlled by a hydraulic machine, comprising
- detecting initiation of a movement of the implement that is such that a piston in the hydraulic cylinder is moved in a first direction,
- driving the hydraulic machine in a first rotational direction, prior to the movement of the implement taking place, so that a line from the hydraulic machine is pressurized, which line is arranged to connect the hydraulic machine to the side of the cylinder toward which the piston will be moved during the movement of the implement,
- detecting an operating parameter that is indicative of pressurizing of the line from the hydraulic machine,
- comparing the detected value with a limit value and terminating the pressurizing if the detected value exceeds the limit value and
- wherein the operating parameter is indicative of a position of the piston in the hydraulic cylinder.
Dependencies are inferred from the claim text.