This invention relates to new and useful improvements in cooling systems for turbocharger mechanisms.Turbocharger systems have heretofore been used for internal combustion engines and employ turbine-like input means driven by the exhaust gas for injecting the air into the engine. Since the exhaust gas serves as the driving power, portions of the turbocharger mechanism, particularly turbine portions such as bearings, are subjected to high temperature conditions. To cool and lubricate these parts, it is customary to provide oil circulating systems therewith.
Such cooling systems employ pump means operated by the vehicle engine. Thus, as long as the vehicle engine is operating, the pump operates to cool the turbocharger. When the engine is shut off, however, the cooling pump also is shut of. Such amounts to a serious disadvantage in that even though the engine has been shut down, the residual heat in the turbocharger mechanism builds up for a short time and is capable of causing damage to working parts and seals of the turbocharger mechanism the same as if the mechanism were operating without being cooled. Another disadvantage of ' present cooling systems is that the residual heat which builds up causes the oil to coke and such coke deposits will in time plug the return line.