| 摘要 |
PURPOSE:To prevent the thermal deterioration after the engine stop by operating a coolant feeding pump when the temperature difference between the coolant in a water jacket and a condenser lower tank is over a prescribed value, while operating a cooling fan when the temperature difference is below a prescribed value. CONSTITUTION:The coolant vapor generated in a water jacket 2 is introduced into a condenser 3, and after cooled by a cooling fan 16, the liquid phase coolant is stored into a lower tank 15. The coolant in the lower tank 15 is returned into the water jacket 2 through the first coolant recirculation passage 23, reservoir tank 21, the second coolant passage 24, and a coolant feeding pump 4. The water jacket 2 and the lower tank 15 are equipped with the first and the second temperature sensors 12 and 17, respectively, and when each detection value of the both sensors 12 and 17 after the engine stop is over a prescribed value, the coolant feeding pump is driven, and when the detection value is below a prescribed value, the cooling fan 16 is driven by a controller 27.
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