Patent ID: 8641382

Claim:
A turbocharger ( 1 ) comprising: a turbine housing ( 2 ), which has an exhaust gas intake opening ( 3 ) and an exhaust gas outlet opening ( 4 ); a turbine rotor ( 5 ), which is fixed on a shaft ( 6 ) and is arranged in the turbine housing ( 2 ); and a plurality of blades ( 7 ; 7 ′), which are arranged in the turbine housing ( 2 ) between the exhaust gas intake opening ( 3 ) and the turbine rotor ( 5 ), each blade having: a blade underside ( 8 ; 8 ′) and a blade top side ( 9 ; 9 ′), which define the blade thickness, a blade leading edge ( 10 ; 10 ′) at a first intersection of the blade underside ( 8 ; 8 ′) and the blade top side ( 9 ; 9 ′), a blade trailing edge ( 11 ; 11 ′) at a second intersection of the blade underside ( 8 ; 8 ′) and the blade top side ( 9 ; 9 ′), a profile center line ( 12 ; 12 ′), which is defined by the blade underside ( 8 ; 8 ′) and the blade top side ( 9 ; 9 ′) and which runs between these from the blade leading edge ( 10 ; 10 ′) to the blade trailing edge ( 11 ; 11 ′), the outline of the profile center line ( 12 ; 12 ′) is undulating with two opposing antinodes ( 12 A, 12 B), and when the profile center line ( 12 , 12 ′) is plotted on an X-Y system of coordinates with the blade leading edge at Y=0 and the blade trailing edge at Y=0: one of the antinodes of the profile center line ( 12 , 12 ′) is an area ( 12 B) which begins at the blade leading edge ( 10 , 10 ′) and which between the blade leading edge ( 10 ) and a zero passage of the profile center line ( 12 ) through the X axis has negative Y values, and the second of the antinodes of the profile center line ( 12 , 12 ′) is an area ( 12 A), which from the zero passage of the profile center line ( 12 , 12 ′) through the X-axis to the blade trailing edge ( 11 ) always has positive Y values wherein the area ( 12 A) from the zero passage of the profile center line ( 12 ; 12 ′) through the X-axis to the blade trailing edge ( 11 ) is greater than the area ( 12 B) from the blade leading edge ( 10 ) and the zero passage of the profile center line ( 12 ) through the X-axis.