| 摘要 |
In a cooling device for an engine, having a motor-driven pump and a flow rate control valve, to obtain a predetermined discharge flow rate (circulating coolant amount) from the pump 500, a pump duty is minimized while maintaining a water flow resistance as low as possible (maintaining a valve opening degree theta as large as possible). Thereby, a value of an electric current flowing through the pump 500 becomes smaller to decrease the energy consumption (power consumption).
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