PROBLEM TO BE SOLVED: To provide an engine cooling device and an engine cooling method which prevent the engine cooling device from getting massive and heavy without increasing the number of radiators while improving fuel efficiency and curbing deterioration of emission performance by cooling both an engine body and intake air supercharged with a supercharger.SOLUTION: An auxiliary cooling circuit 40 of a water-cooled intercooler 14 comprises: a first cooling circuit 41 which circulates cooling water W1 without allowing the same to be circulated through a radiator 34 in a main cooling circuit 31 to cool an engine body 16; a second cooling circuit 42 which circulates the cooling water W2 with the same circulated through the radiator 34; and a cooling circuit switching mechanism which switches a flow passage of the auxiliary cooling circuit 40 to the first cooling circuit 41 when an exit temperature Tout at an exit of a water pump 32 is less than an intake air temperature Ta at the exit of a compressor 13 and to the second cooling circuit 42 when the exit temperature Tout is not less than the intake air temperature Ta.SELECTED DRAWING: Figure 1

    【課題】エンジン本体と過給機で過給された吸気との両方を冷却して排気ガス性能の悪化を回避しながら燃費を向上しつつ、ラジエータの数を増やすことなく装置の重厚長大化を抑制するエンジン用冷却装置及びエンジンの冷却方法を提供する。【解決手段】水冷式インタークーラ14の副冷却回路40に、冷却水W1がエンジン本体16を冷却する主冷却回路31のラジエータ34を経由せずに循環する第一冷却回路41と、冷却水W2がそのラジエータ34を経由して循環する第二冷却回路42と、副冷却回路40の流路を、ウォータポンプ32の出口における出口温度Toutがコンプレッサ13の出口の吸気温度Ta未満の場合に、第一冷却回路41に切り換え、一方、出口温度Toutが吸気温度Ta以上の場合に、第二冷却回路42に切り換える冷却回路切換機構と、を備えて構成した。【選択図】図1


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    Title :

    ENGINE COOLING DEVICE AND ENGINE COOLING METHOD


    Additional title:

    エンジン用冷却装置及びエンジンの冷却方法


    Contributors:

    Publication date :

    2016-12-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F01P Kühlung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein , COOLING OF MACHINES OR ENGINES IN GENERAL



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