摘要 |
<p>In order to simplify the control and construction of the cooling system in a manner which avoids the need for costly electromagnetic valves and control circuits such as mircoprocessor and the like, a reservoir in which coolant is stored is arranged to constantly communicate with a lower portion of a cooling circuit which includes the coolant jacket and the radiator in which the coolant vapor is condensed. A small coolant pump returns condensate from the radiator to the coolant jacket in response to a temperature sensor disposed in the coolant jacket. A cooling fan or like device is operated in response to a second temperature sensor disposed at the bottom of the radiator. The reservoir communicates with the ambient atmosphere through a relief valve which remains closed until a predetermined positive or negative pressure differential prevails between the ambient atmosphere and the interior of the resevoir. </p> |