Patent ID: 8250867

Claim:
An arrangement for recirculation of exhaust gases of a supercharged combustion engine, the arrangement comprising: an exhaust line operable to lead exhaust gases out from the combustion engine; an inlet line operable to lead air to the combustion engine; a return line connected to the exhaust line and to the inlet line for enabling the return line to recirculate exhaust gases from the exhaust line to the inlet line; an air-cooled EGR cooler configured and operable to cool the recirculating exhaust gases by air as a primary cooling medium, the air being at a temperature of the surroundings; the return line including: a liquid coolant-cooled EGR cooler configured and operable to cool the recirculating exhaust gases in a first stage before the exhaust gases are cooled in the air-cooled EGR cooler in a second stage, a bypass line having an extent positioned and configured to lead the recirculating exhaust gases to the inlet line so as to bypass the EGR cooler, and a valve positioned between the EGR cooler and the liquid coolant-cooled EGR cooler and configured and operable to be positioned in one of two valve positions, the two valve positions comprising a first valve position which leads the entire flow of recirculating exhaust gases in the return line through the EGR cooler and a second valve position which leads the entire flow of recirculating exhaust gases in the return line through the bypass line, and the valve being further configured and operable to be positioned to the first valve position when there is no risk of ice formation in the EGR cooler and to the second valve position when there is risk of ice formation in the EGR cooler.