PROBLEM TO BE SOLVED: To provide a cooling device for construction machine capable of assuring cooling performance of high accuracy.SOLUTION: A cooling device of dump truck 100 of this invention comprises a first auxiliary radiator 42 connected to a high temperature radiator 40 through a cooling water pipe 54 set to have a smaller volume than that of the high temperature radiator 40 so as to cool cooling water for an engine 11; a second auxiliary radiator 43 connected to a low temperature radiator 41 through the cooling water pipe 54 so as to cool intake gas compressed by a turbocharger and having its volume to be smaller than that of the low temperature radiator 41; a first auxiliary fan 45 separately arranged from a cooling fan 49 to cool the first auxiliary radiator 42; a second auxiliary fan 46 for cooling the second auxiliary radiator 43; and a controller 50 for performing a controlling operation for selectively operating the cooling fan 49 or the first auxiliary fan 45 and the second auxiliary fan 46 in response to an engine output.SELECTED DRAWING: Figure 2

    【課題】精度の高い冷却性能を確保することができる建設機械の冷却装置の提供。【解決手段】本発明に係るダンプトラック100の冷却装置は、冷却水管54を介して高温ラジエータ40に接続され、エンジン11の冷却水を冷却する高温ラジエータ40よりも容量が小さく設定された第1補助ラジエータ42、及び冷却水管54を介してターボによって圧縮された吸気ガスを冷却する低温ラジエータ41に接続され、低温ラジエータ41よりも容量が小さく設定された第2補助ラジエータ43と、冷却ファン49とは別に設けられ、第1補助ラジエータ42を冷却する第1補助ファン45、及び第2補助ラジエータ43を冷却する第2補助ファン46と、エンジン出力に応じて、冷却ファン49、または第1補助ファン45及び第2補助ファン46を選択的に作動させる制御処理を行うコントローラ50とを備えている。【選択図】図2


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    Title :

    COOLING DEVICE OF CONSTRUCTION MACHINE


    Additional title:

    建設機械の冷却装置


    Contributors:

    Publication date :

    2017-09-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F01P Kühlung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein , COOLING OF MACHINES OR ENGINES IN GENERAL / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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