Patent ID: 8662223

Claim:
A work vehicle comprising: an engine; a travel device configured and arranged to cause the vehicle to travel; a power transmission device configured and arranged to transmit drive power from the engine to the travel device, the power transmission device having a transmission and a torque converter equipped with a lock-up clutch; a cooling fan configured and arranged to cool a coolant of the engine and a power transmission fluid of the torque converter; and a controller configured to set an upper limit of a target rotational speed of the cooling fan in accordance with an engine rotational speed, wherein the controller being configured to reduce the upper limit of the target rotational speed further when the lock-up clutch is in an engaged state than when the lock-up clutch is in a released state, wherein the controller is configured to store first information indicating a relationship between the engine rotational speed and the upper limit of the target rotational speed, and second information indicating a relationship between the engine rotational speed and the upper limit of the target rotational speed and setting the upper limit of the target rotational speed to a lower value than indicated in the first information; and the controller is configured to set the upper limit of the target rotational speed based on the first information when the lock-up clutch is in the released state, and to set the upper limit of the target rotational speed based on the second information when the lock-up clutch is in the engaged state.