Turbocharger with at least one variable turbine geometry turbine

Abstract

The invention relates to a turbocharger for a combustion engine, in particular of a motor vehicle, with at least one variable turbine geometry turbine, which exhibits a rotor disk and vanes arranged on a vane support, which are spaced apart from each other around the rotor disk in at least one circumferential area, and with an adjuster to select the angular setting of the vanes. It is provided that the vanes ( 6 ) are fixed securely to the vane support ( 5 ), and exhibit different angular settings (α 1, α2, α3 ) relative to the rotor disk ( 3 ) in varying sectors ( 8, 9, 10 ) of the circumferential area ( 7 ), wherein the turbine ( 2 ) exhibits a cover device ( 12 ) that can rotate relative to the vane support ( 5 ) with at least one opening ( 14, 20 ) in its jacket surface ( 16 ) for purposes of sector selection.

1 . A turbocharger for a combustion engine comprising:
 at least one variable turbine-geometry turbine, including a rotor disk, a vane support, and vanes arranged on the vane support, which are spaced apart around the rotor disk, at least in a circumferential area for defining at least one sector; and   a cover device having a jacket surface, wherein the cover device rotates relative to the vane support, and at least one opening is included in the jacket surface for selecting a sector;   wherein the vanes are fixed securely to the vane support, and exhibit different angular settings relative to the rotor disk in varying sectors of the circumferential area.   
   
   
       2 - 9 . (canceled) 
   
   
       10 . The turbocharger according to  claim 1 , wherein the vanes create a vane support that circumferentially envelops the rotor disk. 
   
   
       11 . The turbocharger according to  claim 1 , wherein the vanes extend from an inner circumference of the cover device to an outer circumference of the rotor disk. 
   
   
       12 . The turbocharger according to  claim 1 , wherein the sectors include a uniform expansion. 
   
   
       13 . The turbocharger according to  claim 1 , wherein a circumferential expansion of the opening corresponds to a circumferential expansion of the sectors. 
   
   
       14 . The turbocharger according to  claim 1 , wherein the cover device is at least partially created by a casing of the turbine. 
   
   
       15 . The turbocharger according to  claim 1 , wherein the cover device is designed as one of a separate sleeve and a separate adjustment ring. 
   
   
       16 . The turbocharger according to  claim 1 , wherein the cover device includes several openings and the turbocharger includes at least two generally identically designed, mutually allocated sectors. 
   
   
       17 . The turbocharger according to  claim 1 , wherein a minimal gap is created between ends of the vanes in an outer circumferential area of the rotor disk and an outer circumference of the rotor disk. 
   
   
       18 . The turbocharger according to  claim 10 , wherein the vanes extend from an inner circumference of the cover device to an outer circumference of the rotor disk. 
   
   
       19 . The turbocharger according to  claim 10 , wherein the sectors include a uniform expansion. 
   
   
       20 . The turbocharger according to  claim 10 , wherein a circumferential expansion of the opening corresponds to a circumferential expansion of the sectors. 
   
   
       21 . The turbocharger according to  claim 10 , wherein the cover device is at least partially created by a casing of the turbine. 
   
   
       22 . The turbocharger according to  claim 10 , wherein the cover device is one of a separate sleeve and a separate adjustment ring. 
   
   
       23 . The turbocharger according to  claim 10 , wherein the cover device includes several openings and the turbocharger includes at least two generally identically designed, mutually allocated sectors. 
   
   
       24 . The turbocharger according to  claim 10 , wherein a minimal gap is created between ends of the vanes in an outer circumferential area of the rotor disk and an outer circumference of the rotor disk. 
   
   
       25 . The turbocharger according to  claim 11 , wherein the sectors include a uniform expansion. 
   
   
       26 . The turbocharger according to  claim 11 , wherein a circumferential expansion of the opening corresponds to a circumferential expansion of the sectors. 
   
   
       27 . The turbocharger according to  claim 11 , wherein the cover device is at least partially created by a casing of the turbine. 
   
   
       28 . The turbocharger according to  claim 11 , wherein the cover device is one of a separate sleeve and a separate adjustment ring.