Patent ID: 9322603
Filing Date: 2016-04-26
CPC Classification: E02F,F01P,F02D,F28F

Claim Text:
1. A work machine, comprising: an engine; a radiator for cooling a cooling water of the engine; a thermostat, provided upon a path that conducts the cooling water to the radiator, and that increases its aperture area as a temperature of the cooling water increases within a cooling water temperature range from an opening-start temperature at which the thermostat starts opening to a fully-open temperature at which the thermostat is fully open, to increase a flow rate of the cooling water supplied to the radiator; a fan device that blows external air at the radiator; an output changeover switch that is operated to select one of a first mode in which an output of the engine is limited and a second mode in which the output of the engine is not limited; a rotational speed setting unit that sets a target rotational speed for the fan device according to the temperature of the cooling water; and a rotational speed adjustment unit that adjusts a rotational speed of the fan device to be equal to the target rotational speed set by the rotational speed setting unit, wherein: the rotational speed setting unit sets the target rotational speed of the fan device to be lower in the first mode selected by the output changeover switch and to be higher in the second mode selected by the output changeover switch at any temperature within the cooling water temperature range between the opening-start temperature and the fully-open temperature.