Patent ID: 7650753

Claim:
A method of cooling exhaust gas and charge air using an arrangement for cooling recirculated exhaust gas and charge air in a motor vehicle with a turbocharger having at least one heat exchanger for an exhaust gas stream, a charge air cooler for a charge air stream, and a throttle member for controlling the coolant stream in the low temperature coolant circuit, wherein the at least one heat exchanger for the exhaust gas stream and the charge air cooler are part of a common low temperature coolant circuit, and wherein the throttle member is configured to distribute the coolant stream between the at least one heat exchanger and the charge air cooler such that the coolant stream mainly flows through the at least one heat exchanger at low to medium engine loads and speeds and mainly flows through the charge air cooler at high engine loads and speeds, the method comprising: using the same coolant of the low temperature coolant circuit to cool both the recirculated exhaust gas and the charge air.