Patent ID: 7261068

Claim:
A dual-circuit cooling system for a vehicle, comprising: an endless loop first fluid circuit, an endless loop second fluid circuit, and a pump integrated into both the first fluid circuit and the second fluid circuit so as to be in common therewith to pump coolant therethrough, the pump situated such that the first fluid circuit is fluidly parallel to the second fluid circuit, the first fluid circuit comprising a first radiator, a first radiator bypass in parallel with the first radiator, a first heat exchanger positioned to receive coolant from the first radiator and the first radiator bypass and associated with an engine of the vehicle for transferring heat between the engine and the first heat exchanger, the pump, and a first thermostat for selectively directing coolant between the first radiator and the first radiator bypass in response to temperature, and the second fluid circuit comprising a second radiator, a second radiator bypass in parallel with the second radiator, a second heat exchanger positioned to receive coolant from the second radiator and the second radiator bypass and associated with a component of the vehicle other than the engine for transferring heat between the component and the second heat exchanger, the pump, and a second thermostat for selectively directing coolant between the second radiator and the second radiator bypass in response to temperature.