On demand machine rimpull adjustment to prevent tire slip
AssigneeCaterpillar Inc.
InventorJeffery Berry
Life of this patent
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Abstract
A system for proactively controlling a rimpull limit of a machine includes a hydraulic system having a lift cylinder to move an implement; a lift cylinder pressure sensor that senses a hydraulic pressure of the lift cylinder and responsively produces a lift cylinder pressure signal; and a controller in operable communication with the power train and the lift cylinder pressure sensor. The controller is configured to receive the lift cylinder pressure signal; determine the rimpull limit based at least in part upon the lift cylinder pressure signal; and adjust the torque of the power train to the rimpull limit.
Claims19
A system for proactively controlling a rimpull limit of a machine, the machine including an implement and a power train including an engine and producing a torque, the system comprising:
- a hydraulic system, the hydraulic system including a lift cylinder to move the implement;
- a lift cylinder pressure sensor that senses a hydraulic pressure of the lift cylinder and responsively produces a lift cylinder pressure signal;
- and
- a controller in operable communication with the power train and the lift cylinder pressure sensor, the controller being configured to:
- receive the lift cylinder pressure signal;
- determine the rimpull limit based at least in part upon the lift cylinder pressure signal;
- increase the rimpull limit in response to an increase in the hydraulic pressure of the lift cylinder;
- and
- adjust the torque of the power train to the rimpull limit.
A system for proactively controlling tire slip of a machine, the machine including an implement and a power train including an engine and producing a rimpull, the system comprising:
- a wheel having a tire and mounted on the machine in operable communication with the power train;
- a hydraulic system including a lift cylinder to move the implement;
- a lift cylinder pressure sensor that senses a pressure of the lift cylinder and responsively produces a lift cylinder pressure signal;
- and
- a controller in operable communication with the power train and lift cylinder pressure sensor, the controller being configured to:
- receive the lift cylinder pressure signal;
- determine a downforce on the wheel based at least in part upon the lift cylinder pressure signal;
- and
- increase the rimpull applied to the wheel in response to an increase in the downforce on the wheel.
A method for on demand rimpull control of a machine, the machine including an implement in operable communication with a hydraulic lift cylinder and a power train including an engine and producing a torque, the method comprising:
- sensing a hydraulic pressure of the hydraulic lift cylinder;
- receiving within a controller a hydraulic pressure signal that is indicative of the hydraulic pressure of the hydraulic lift cylinder;
- determining, via the controller, a rimpull limit based at least in part upon the hydraulic pressure signal;
- increasing the rimpull limit in response to an increase in the hydraulic pressure of the hydraulic lift cylinder;
- and
- adjusting the torque to the rimpull limit.
Dependencies are inferred from the claim text.