Patent ID: 8327812

Claim:
A cooling system for a liquid cooled internal combustion engine having at least one combustion chamber, said system comprising: coolant passages formed at least around the combustion chamber for said engine; a heat exchange device fluidly connected to said passages for dissipating heat from at least around the combustion chamber; a pump for circulating coolant through said passages and said heat exchanger, said coolant passages, heat exchange device and pump being selected to cause nucleate boiling at least around said combustion chamber; a sensor for indicating the presence of nucleate boiling in said system, at least one chamber connected to said cooling system, said chamber having a dividing wall movable within said chamber to vary the volume of the chamber connected to said cooling system, and a device for variably displacing said dividing wall in response to control by said sensor to maintain the pressure in said system at a level permitting controlled nucleate boiling to increase the heat flux from at least around the combustion chamber, wherein said sensor is a bubble detector.