COOLING DEVICE OF CONSTRUCTION MACHINE

• Main Authors: SUGAWARA TATSUYA, OZAKA TADASHI, FUKUDA NAOKI, KONO RYUJI, IKARI TAKANOBU, ARAI MASATSUGU, TANAKA TAKATERU
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2017
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; STEAM ENGINES; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

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