PROBLEM TO BE SOLVED: To provide a cooling water valve control mechanism capable of making both compatible in prevention of deterioration of fuel economy at cold start of an internal combustion engine and improvement in comfortableness.SOLUTION: A cooling water valve control mechanism includes: a heater core flow passage 20 for sending cooling water warmed by an internal combustion engine 10 to a heater core 21; a bypass flow passage 30 provided in such a manner of bypassing the heater core 21; a selector valve 40 which can switch a flow passage of the cooling water between the heater core flow passage 20 and the bypass flow passage 30; and valve control means 50 for setting a first water temperature Twas a reference water temperature when an intake air temperature is equal to or higher than a first intake air temperature Taand setting a second water temperature Twwhich falls from the first water temperature Twin accordance with falling of the intake air temperature as the reference water temperature when the intake air temperature is lower than the first intake air temperature Ta, and switching the selector valve 40 to the heater core flow passage 20 side when the water temperature of the cooling water is equal to or higher than the reference water temperature in correspondence with the intake air temperature and switching to the bypass flow passage 30 side when the water temperature is lower than the reference water temperature.SELECTED DRAWING: Figure 1
【課題】内燃機関の冷間始動時における燃費低下の防止と居住性向上の両立を図った冷却水バルブ制御機構を提供する。【解決手段】ヒータコア21に内燃機関10によって温められた冷却水を送るヒータコア流路20と、ヒータコア21を迂回するように設けられるバイパス流路30と、ヒータコア流路20とバイパス流路30の間で前記冷却水の流路を切り替え可能とする切替バルブ40と、吸気温が第一吸気温Ta1以上のときに第一水温Tw1を、第一吸気温Ta1よりも低いときに第一水温Tw1から前記吸気温の低下とともに低下する第二水温Tw2を基準水温として設定し、前記冷却水の水温が、前記吸気温に対応する基準水温以上のときに切替バルブ40をヒータコア流路20側に、基準水温よりも低いときにバイパス流路30側にそれぞれ切り替えるバルブ制御手段50と、を備えた冷却水バルブ制御機構を構成する。【選択図】図1
COOLING WATER VALVE CONTROL MECHANISM
冷却水バルブ制御機構
2017-06-22
Patent
Electronic Resource
Japanese
IPC: | F01P Kühlung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein , COOLING OF MACHINES OR ENGINES IN GENERAL / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen |
Integrated valve, cooling system and integrated valve control method
European Patent Office | 2024
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