COOLING DEVICE OF INDUSTRIAL VEHICLE

摘要

A cooling device of an industrial vehicle capable of preventing the power transmission efficiency of an engine from being lowered due to a reduction in the viscosity of hydraulic oil in a torque converter by cooling cooling water and the hydraulic oil at optimum cooling efficiency. Based on the detected temperature of the cooling water (W) in a radiator (21), the temperature of the hydraulic oil (Oc) in cylinders (10) and (11), and the temperature of the hydraulic oil (Ot) in the torque converter (27), an ATC (32) obtains the upper limit rotational speed of a cooling fan (34) and, when the rotational speed of the cooling fan (34) reaches an upper limit rotational speed, restricts the rotational speed of the cooling fan (34) so that the rotational speed does not rise beyond the upper limit rotational speed. When the rotational speed of the cooling fan (34) is within the range of the upper limit rotational speed or below, the rotational speed of the cooling fan (34) is in proportion to the rotational speed of the engine.