Patent ID: 8312720
Filing Date: 2012-11-20
Classification: F01D,F02B,F02C,F02M,Y02T

Abstract:
1. An internal combustion engine ( 10 ) for a motor vehicle, comprising a combustion air inlet tract ( 16 ), an at least double path exhaust gas discharge tract ( 24 ), an exhaust gas turbocharger ( 12 ), which has a compressor wheel ( 18 ), arranged in the combustion air inlet tract ( 16 ) of the internal combustion engine ( 10 ) and a turbine wheel ( 22 ) coupled to the compressor wheel ( 18 ) in a rotationally fixed manner and being arranged in the double path exhaust gas discharge tract ( 24 ) of the internal combustion engine ( 10 ), the exhaust gas turbine ( 22 ) having a housing ( 28 ) with an exhaust gas guide section ( 26 ) including at least a first spiral channel ( 30 a ) coupled to a first exhaust gas path ( 24 a ) of the double path exhaust gas discharge tract ( 24 ) through which exhaust gas can be independently conducted, a flow control device ( 32 ) arranged upstream of the exhaust gas guide section ( 26 ), by means of which the exhaust gas guide section ( 26 ) can be bypassed, and first and second guide vane elements ( 42 a , 42 b ) arranged upstream of the turbine wheel ( 22 ) and downstream of first and second spiral channels respectively ( 30 a , 30 b ) in the exhaust gas guide section ( 26 ), the first and the second guide vane elements ( 42 a , 42 b ) being formed with a first degree of asymmetry (A 1 ), which can be determined as a quotient of a first critical mass flow parameter (Θ 42a ) and a second critical mass flow parameter (Θ 42b ) and which has a value between 0.4 and 0.8.