Wheel loader and method for controlling wheel loader
AssigneeKomatsu Ltd.
InventorAtsushi Shirao
Life of this patent
Estimating the term…
Abstract
A traction force control section of a wheel loader, when the determination conditions are satisfied during traction force control, increases the maximum traction force. The determination conditions include that the wheel loader is performing an excavation operation, that the vehicle speed is less than or equal to a prescribed speed threshold value, that the amount of operation of the accelerator operating member is equal to or more than a prescribed accelerator threshold value, and that the amount of operation of the inching operating member is less than or equal to a prescribed inching operation threshold value.
Claims17
A wheel loader comprising:
- a work implement including a boom and a bucket;
- an engine;
- a hydraulic pump configured to be driven by the engine;
- a hydraulic motor for travel configured to be driven by a hydraulic fluid ejected from the hydraulic pump;
- an accelerator operating member configured to be operated to set a target rotational speed of the engine;
- an inching operating member configured to be operated to reduce a vehicle speed;
- a vehicle speed detecting section configured to detect the vehicle speed;
- an accelerator operation determining section configured to determine whether or not an amount of operation of the accelerator operating member is equal to or more than a prescribed accelerator threshold value;
- an inching operation determining section configured to determine whether or not an amount of operation of the inching operating member is less than or equal to a prescribed inching operation threshold value;
- and
- a traction force control section configured to perform a traction force control to reduce a maximum traction force;
- wherein, the traction force control section is configured to increase the maximum traction force when determination conditions are satisfied during the traction force control, the determination conditions including conditions that the wheel loader is performing an excavation operation, the vehicle speed is less than or equal to a prescribed speed threshold value, the amount of operation of the accelerator operating member is equal to or more than the prescribed accelerator threshold value, and the amount of operation of the inching operating member is less than or equal to the prescribed inching operation threshold value.
A method for controlling a wheel loader including an engine and a work implement including a boom and a bucket, the method comprising:
- determining whether or not the wheel loader is performing an excavation operation;
- determining whether or not a vehicle speed is less than or equal to a prescribed speed threshold value;
- determining whether or not an amount of operation of an accelerator operating member is equal to or more than a prescribed accelerator threshold value;
- determining whether or not an amount of operation of an inching operating member is less than or equal to a prescribed inching operation threshold value;
- and
- during a traction force control for reducing a maximum traction force, increasing the maximum traction force when determination conditions are satisfied, wherein, the determination conditions include conditions that the wheel loader is performing the excavation operation, the vehicle speed is less than or equal to the prescribed speed threshold value, the amount of operation of the accelerator operating member is equal to or more than the prescribed accelerator threshold value, and the amount of operation of the inching operating member is less than or equal to the prescribed inching operation threshold value.
Dependencies are inferred from the claim text.