| 摘要 |
PURPOSE:To enable to perform stable heating even during idling and to enable heating to become effective rapidly through efficient circulation of only warmed coolant to a heater core during heating-up, by a method wherein heating of the interior of a vehicle is conducted through utilization of coolant of a boiling cooling system. CONSTITUTION:During idling of an engine and running at a low speed, a circulation pump 31 is driven at a specified rotation speed and therefore, a given amount of coolant is always fed to a heater core 26 from a water jacket 2 to maintain a stable heating capacity. During the starting of an engine, the coolant in the water jacket 2 is not agitated, and the coolant, increased in temperature, in the upper part of the jacket 2 is efficiently circulated to the heater core 26. Even during heating up of an engine, wherein the whole coolant in the jacket 2 is not completely heated, heating can be conducted, and this enables heating to become effective early. In boiling and cooling, the capacity of the jacket 2 is decreased, and this causes the coolant to be heated in a short time and permits heating to become effective more earlier.
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