WORK VEHICLE

摘要

A work vehicle includes a drive unit, a fan motor, a fan configured to be driven by the fan motor, an overrun state detecting unit configured to detect an overrun state of the drive unit, and a control unit. The control unit is configured to control a rotational speed of the fan to reach a first fan rotational speed by increasing the rotational speed of the fan when a detection value detected by the overrun state detecting unit becomes greater than or equal to a first threshold. The control unit is configured to control the rotational speed of the fan to reach a second fan rotational speed higher than the first fan rotational speed when the detection value becomes greater than or equal to a second threshold greater than the first threshold.

主权项

1. A work vehicle, comprising:
an engine; a fan variable displacement pump and a first travelling variable displacement pump, both of which being configured to be driven by the engine; a first travelling variable displacement motor configured to be rotated by a pressurized oil of the first travelling variable displacement pump; a drive unit configured to be driven by the first travelling variable displacement motor; a fan motor configured to be rotated by a pressurized oil of the fan variable displacement pump; a fan configured to be driven by the fan motor; an overrun state detecting unit configured to detect an overrun state of the drive unit; and a control unit configured to control a rotational speed of the fan to reach a first fan rotational speed by increasing the rotational speed of the fan when a detection value detected by the overrun state detecting unit becomes greater than or equal to a first threshold, the control unit being configured to control the rotational speed of the fan to reach a second fan rotational speed higher than the first fan rotational speed when the detection value becomes greater than or equal to a second threshold greater than the first threshold.