Patent ID: 7017560

Claim:
A method for recirculating a part of exhaust gases from an exhaust pipe ( 6 , 9 ) of a diesel engine ( 1 ) to an inlet of the engine, the exhaust gases being diverted from the exhaust pipe ( 6 , 9 ) and directed through a recirculation conduit ( 10 ) to a controllable valve device ( 12 ) arranged between the engine and an air intake ( 2 ) thereof to enable supply of air/recirculated exhaust gases in a desired relation to a combustion chamber of the engine, the valve device comprising dampers ( 20 , 21 ) arranged in inlet channels ( 17 , 18 ) for the recirculated exhaust gases and air respectively, characterized in that at least one of the dampers ( 20 , 21 ) always is maintained open, the other damper ( 20 , 21 ) is closed by means of a drive motor ( 22 ) common to the dampers, and the drive motor ( 22 ) operates one of the dampers ( 20 , 21 ) at a time and adjusts the same into any position between the open position and the closed position.