Work vehicle and control method for work vehicle
AssigneeKomatsu Ltd.
InventorAkira Nakashima
Life of this patent
Estimating the term…
Abstract
A hydraulic pump is driven by an engine. A hydraulic motor is driven by hydraulic fluid discharged from the hydraulic pump thereby causing a vehicle to travel. A controller controls a rotation speed of the engine and a displacement of the hydraulic pump. The controller acquires a tractive force of the vehicle. The controller changes the rotation speed of the engine to a low speed side in accordance with a reduction in the tractive force.
Claims16
A work vehicle comprising:
- an engine;
- a hydraulic pump driven by the engine;
- a hydraulic motor driven by hydraulic fluid discharged from the hydraulic pump to travel the work vehicle;
- and
- a controller for controlling a rotation speed of the engine and a displacement of the hydraulic pump,
- the controller being configured to
- acquire a tractive force of the vehicle;
- and
- reduce the rotation speed of the engine in accordance with a reduction in the tractive force.
A method for controlling a work vehicle including an engine, a hydraulic pump driven by the engine, and a hydraulic motor that is driven by hydraulic fluid discharged from the hydraulic pump to travel the work vehicle, the method comprising:
- acquiring a tractive force of the work vehicle;
- controlling a rotation speed of the engine and a displacement of the hydraulic pump;
- and
- reducing the rotation speed of the engine in accordance with a reduction in the tractive force.
Dependencies are inferred from the claim text.