Patent ID: 7299771

Claim:
An internal combustion engine, comprising: a coolant pump having a pump outlet; a first exhaust gas recirculation (EGR) cooler fluidly connected to the pump outlet; a crankcase fluidly connected in parallel with the EGR cooler to the pump outlet for receiving coolant therefrom; a cylinder head fluidly connected to the crankcase for receiving coolant therefrom; a thermostat fluidly connected between the cylinder head and the coolant pump; and a valve system having a first selectable position fluidly connecting the flow from the first EGR cooler to the flow in the cylinder head and a second selectable position fluidly connecting the flow from the first EGR cooler to the thermostat in bypassing relation to the cylinder head, said first or second position being effected in response to an engine operating parameter.