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US 8,418,798 B2Granted
Industrial vehicle
AssigneeKomatsu Ltd.
InventorsTakuya Mori, Hirotaka Takahashi, Toru Shiina, Masanori Ikari, Atsushi Shirao
Life of this patent
Estimating the term…
Abstract
In a work vehicle, a controller controls the displacement of a hydraulic motor by electronically controlling a motor displacement control part. When an inching operation member is being operated, the controller performs inching control for setting the minimum displacement of the hydraulic motor to a greater value in correspondence with a lower pilot pressure detected by a pilot pressure detector.
Claims4
A work vehicle comprising:
- an engine;
- a hydraulic pump that is a variable displacement hydraulic pump, the hydraulic pump driven by the engine;
- a pump displacement control part configured to control displacement of the hydraulic pump according to a supplied pilot pressure;
- a pilot pressure supply part configured to supply pilot pressure to the pump displacement control part according to rotation rate of the engine;
- a hydraulic motor that is a variable displacement hydraulic motor, the hydraulic motor driven by hydraulic fluid discharged by the hydraulic pump;
- a drive wheel driven by the hydraulic motor;
- a motor displacement control part configured to control displacement of the hydraulic motor;
- an inching operation member configured to be operated for reducing the pilot pressure supplied to the pump displacement control part;
- a pilot pressure detector configured to detect the pilot pressure supplied to the pump displacement control part;
- and
- a controller configured to control the displacement of the hydraulic motor by electronically controlling the motor displacement control part, and, when the inching operation member is being operated, to perform inching control so that minimum displacement of the hydraulic motor is set to a greater value in correspondence with a lower pilot pressure detected by the pilot pressure detector.
8 more elements
Dependencies are inferred from the claim text.