Patent ID: 7334397

Claim:
A device for purifying exhaust gases from a combustion engine ( 1 ), comprising an arrangement ( 30 ) for recirculating exhaust gases from the engine to an air intake ( 2 ) thereof, a valve device ( 12 ) controlled by a control device ( 13 ) for regulating the relation between fresh air and recirculated exhaust gases supplied to the engine, a regenerable filter ( 8 ) adapted to catch particulate constituents of the exhaust gases, and means ( 14 ) for recording the temperature of the exhaust gases from the engine, the control device ( 13 ) being adapted to be supplied with temperature information from said temperature recording means ( 14 ), wherein the control device ( 13 ) is adapted, with the aid of said temperature information and the valve device ( 12 ), to regulate the relation between fresh air and recirculated exhaust gases supplied to the engine to achieve a relation between NO x and soot of the exhaust gases from the engine that is favorable for regeneration of the filter ( 8 ).