Patent ID: 7513114
Filing Date: 2009-04-07
Classification: F02B,Y02T

Abstract:
1. An exhaust gas turbocharger for a reciprocating internal combustion engine including a plurality of cylinders with a displacement volume V H and an inlet line ( 6 ), and with an exhaust line ( 4 a , 4 b ), said exhaust gas turbocharger ( 2 ), having an exhaust gas turbine ( 3 ) with a turbine rotor ( 10 ) in the exhaust line ( 4 ) and a compressor ( 5 ) with a compressor wheel ( 21 ) in the inlet line ( 6 ), the exhaust gas turbine ( 3 ) having at least first and second exhaust gas inlet flow passages ( 7 , 8 ), by way of which exhaust gas is to be fed to the turbine rotor ( 10 ), the ratio D T /D V of the turbine rotor diameter D T to the compressor wheel diameter D V being governed by the relationship wherein J denotes a constant in the range between 1 and 1.05. K denotes a parameter which varies as function of the swept volume V  as a function of the displacement volume V Asy denotes a turbine-specific degree of asymmetry, which is to be determined according to the relationship  as a function of the critical flow rate parameter Φ