A control method of controlling the cooling water temperature of an engine mounted in a vehicle is provided in which the lower limit value of the engine rotation speed is set according to the outside air temperature and the vehicle speed. When the vehicle starts traveling, a temperature raising-state lower limit rotation speed is set to raise the cooling water temperature to a third threshold value (70°C). After the cooling water temperature is raised to the third threshold value, the lower limit value is not set. If the cooling water temperature turns to drop and drops to a second threshold value (65°C), a maintaining-state lower limit rotation speed lower than the temperature raising-state lower limit rotation speed is set to raise the cooling water temperature. Here, if the cooling water temperature does not rise but continues dropping and drops to a first threshold value (60°C), a temperature re-raising-state lower limit rotation speed lower than the temperature raising-state lower limit rotation speed and higher than the maintaining-state lower limit rotation speed is set.


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    Title :

    ENGINE COOLING WATER TEMPERATURE CONTROL METHOD AND CONTROL APPARATUS


    Additional title:

    VERFAHREN UND VORRICHTUNG ZUR TEMPERATURSTEUERUNG DER KÜHLFLÜSSIGKEIT EINES MOTORS
    PROCÉDÉ ET DISPOSITIF DE RÉGULATION DE LA TEMPÉRATURE DE LIQUIDE DE REFROIDISSEMENT DE MOTEUR


    Contributors:

    Publication date :

    2022-02-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F01P Kühlung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein , COOLING OF MACHINES OR ENGINES IN GENERAL / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F02N STARTING OF COMBUSTION ENGINES , Anlassen von Brennkraftmaschinen



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