Patent ID: 8418798
Filing Date: 2013-04-16
Classification: B60W,F16H

Abstract:
1. 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.