Patent ID: 7934379
Filing Date: 2011-05-03
Classification: F02B,F02D,F02M,F05B,Y02T

Abstract:
1. An internal combustion engine comprising an exhaust gas turbocharger, said engine having at least one variable-volume combustion chamber, and an exhaust gas tract ( 4 ) extending from the combustion chamber, said combustion chamber having a total piston displacement volume V 11 that can be determined by the difference between a minimum and a maximum combustion chamber volume, said exhaust gas turbocharger ( 20 ) including a turbine ( 3 ) arranged in the exhaust gas tract ( 4 ) of the internal combustion engine ( 100 ) with a turbine wheel ( 12 ) having a diameter D T and with at least two inlet passages ( 6 , 7 ) and a neck cross section A l in which the inlet passages ( 6 , 7 ) end in at least two annular nozzles with flow cross-sections of different size, and through which exhaust gas can be supplied to the turbine wheel ( 12 ) via the inlet passages ( 6 , 7 ), and a valve arrangement ( 50 ) with a flow cross-section dA Ab , which is adjustable between a minimum opening cross-section dA Ab,min and a maximum opening cross-section dA Ab,max being provided in the exhaust gas tract ( 4 ) to the turbine ( 3 ), for diverting exhaust gas from one inlet passage ( 6 , 7 ) into the other inlet passage ( 7 , 6 ) or blowing exhaust gas off past the turbine wheel ( 12 ), wherein based on an engine braking mode at maximum braking power of the internal combustion engine 100 , the diameter D the piston displacement V a smallest flow cross section A the maximum opening cross section dA where the turbocharger braking factor TBF if the neck cross-section A if the neck flow cross-section A