Patent ID: 8286748
Filing Date: 2012-10-16
Classification: B60W,F16H

Abstract:
1. A work vehicle comprising: an engine; a hydraulic pump driven by the engine; a hydraulic motor that is a variable displacement hydraulic motor driven by hydraulic fluid discharged by the hydraulic pump; a motor displacement control part configured to control displacement of the hydraulic motor; a drive wheel driven by the hydraulic motor; a pressure detector configured to detect driving hydraulic pressure, which is the pressure of the hydraulic fluid for driving the hydraulic motor; a fluid temperature detector configured to detect the temperature of the hydraulic fluid; and a controller configured to control the motor displacement control part via feedback control so that the driving hydraulic pressure detected by the pressure detector approaches a predetermined target driving hydraulic pressure, the controller being configured to perform low temperature motor displacement limitation control for reducing the maximum displacement of the hydraulic motor when the temperature of the hydraulic fluid detected by the fluid temperature detector is lower than a predetermined temperature.