On demand machine rimpull adjustment to prevent tire slip
AssigneeCaterpillar Inc.
InventorJeffrey Berry
Life of this patent
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Abstract
A system for proactively controlling 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.
Claims20
A method for controlling a wheel loader machine, the wheel loader machine having a hydraulically-driven bucket control system including a lift cylinder and a bucket;
- and a power train including an engine and producing a torque for moving wheels of the wheel loader machine, the method comprising:
- automatically increasing a force available at the wheels of the wheel loader machine in response to an increase in pressure in the hydraulically-driven bucket control system, wherein the automatically increasing of the force available at the wheels corresponds to an increasing of a rimpull limit.
A method for controlling a machine, the machine having a hydraulically-driven implement control system including a lift cylinder and an implement;
- and a power train including an engine and producing a torque for moving wheels of the machine, the method comprising:
- automatically increasing a force available at the wheels by increasing a rimpull limit in response to at least one of:
- an increase in pressure in the hydraulically-driven implement control system, or
- movement of the implement by the hydraulically-driven implement control system.
A system for controlling a machine, the system comprising:
- a hydraulically-driven implement control system including a lift cylinder and an implement;
- a power train including an engine and producing a torque for moving wheels of the machine;
- and
- a controller in operable communication with the hydraulically-driven implement control system, the engine, and the power train, the controller being configured to:
- automatically increase a force available at the wheels by increasing a rimpull limit in response to an increase in pressure in the hydraulically-driven implement control system.
Dependencies are inferred from the claim text.