Turbocharged engine cooling system with two two-pass radiators

Internal-combustion engines – Cooling – Parallel flow

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Details

123 4131, 123563, F01P 320

Patent

active

061583987

ABSTRACT:
A dual circuit cooling system for a vehicle having an engine and a turbocharger aftercooler includes a modular radiator system having partitions in the tanks of the radiator. The partitions create separate radiator sections, and the partitions contain orifices that provide a crossover function between the sections. During cooler engine operating temperatures the engine thermostat closes which causes engine coolant to be circulated mainly within the engine, and which also causes pressure downstream of the thermostat to drop. The reduced pressure allows coolant from the aftercooler circuit to pass through a first crossover and circulate through the main radiator, then through a second crossover and back to the aftercooler circuit. During higher engine temperatures the thermostat opens, equalizing pressure between the circuits, thus creating normal flow through the circuits.

REFERENCES:
patent: 4317439 (1982-03-01), Emmerling
patent: 4520767 (1985-06-01), Roettgen et al.
patent: 5353757 (1994-10-01), Susa et al.
patent: 5669338 (1997-09-01), Pribble et al.
patent: 5910099 (1999-06-01), Jordan, Jr. et al.

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