Patent ID: 7562529
Filing Date: 2009-07-21
Classification: F02B,F02M,Y02T

Abstract:
1. An internal combustion engine ( 1 ) including first and second groups of cylinders ( 1 a , 1 b ), an exhaust gas turbocharger ( 2 ) and an exhaust gas recirculation system ( 14 ), the exhaust gas turbocharger ( 2 ) having an exhaust gas turbine ( 3 ) with a turbine rotor ( 8 ), separate first and second turbine flow passages ( 11 a , 11 b ) of different flow cross-sections arranged upstream of the turbine rotor ( 8 ), each flow passage ( 11 a , 11 b ) being in communication with a first and, respectively, second exhaust line ( 4 a , 4 b ) for supplying exhaust gas from the internal combustion engine ( 1 ) to the exhaust gas turbine ( 3 ), a recirculation line ( 15 ) of the exhaust gas recirculation system ( 14 ) connecting the first exhaust line ( 4 a ) assigned to the smaller first flow passage ( 11 a ) to an intake line ( 6 ) of the internal combustion engine ( 1 ) via an adjustable valve ( 16 ) arranged in the recirculation line ( 15 ), a bypass line ( 19 ), which bypasses the exhaust gas turbine ( 3 ) extending from the adjustable valve ( 16 ) to a turbine outlet, and a controller ( 18 ) for switching the adjustable valve ( 16 ), depending on engine operation into the following positions so as to minimize engine emissions: the recirculation line ( the recirculation line ( the recirculation line (