Patent ID: 6098576
Filing Date: 2000-08-08
Classification: F01P,F02B,Y02T

Abstract:
An enhanced split cooling system for a turbocharged internal combustion engine including a liquid cooled turbocharger and an engine liquid coolant jacket, comprising:a coolant pump for pumping coolant from a coolant storage tank into heat exchange relationship with the engine jacket and turbocharger;an oil cooler;a first valve assembly including a blocking valve and a pair of flow directing valves;a first coolant output line for conveying coolant from the engine to the first valve assembly and a second coolant output line for selectively flowing coolant from the engine to the oil cooler;a second valve assembly including a blocking valve and a flow directing valve, said first coolant output line being connected to an input of said second valve assembly;a radiator connected via a third coolant line for receiving coolant from the second valve assembly and having a coolant outflow line to return coolant to the coolant tank;an intercooler operatively associated with the turbocharger for passing the coolant in heat exchange relationship with compressed air in the turbocharger;a lube oil subcooler coupled by a fourth coolant flow line to receive coolant from the radiator and having a coolant outflow line selectively couplable through the first valve assembly to the oil cooler and the coolant tank; andan intercooler subcooler coupled by a fifth coolant flow line to receive coolant from the first subcooler and having a coolant outflow line selectively couplable through the first valve assembly to the coolant tank and the intercooler;each of the first and the second valve assemblies being independently operable for selectively directing coolant flow through the radiator and subcoolers and the oil cooler and intercooler as a function of engine operating temperature.