Cooling system for automotive engine or the like

In an internal combustion engine having a structure subject to high heat flux

• a cooling system comprising:
• a coolant jacket disposed about said structure and into which coolant is introduced in liquid form and discharged in gaseous form;
• a radiator in fluid commuication with said coolant jacket which receives coolant vapor produced therein and condenses it to its liquid form, said radiator including a small collection vessel disposed at the bottom thereof;
• a reservoir in which coolant is stored, said reservoir being fluidly interposed between the collection vessel of said radiator and said coolant jacket;
• a level sensor disposed in said coolant jacket, said level sensor being arrange to sense the level of liquid coolant in said coolant jacket falling below a predetermined level and issues a signal indicative thereof, said predetermined level being selected to be such that said structure subject to high heat flux is immersed in a predetermined depth of liquid coolant;
• a pump which pumps liquid coolant from said reservoir to said coolant jacket through a coolant return conduit, said pump being responsive to said level sensor in a manner to maintain the level of liquid in said coolant jacket at said predetermined level;
• a first temperature sensor disposed in said radiator;
• a second temperature sensor disposed in said coolant jacket;
• and
• a device associated with one of said radiator, said coolant jacket and said reservoir, said device being responsive to one at least one of said first and second temperature sensors for controlling the pressure within the cooling system.