Turbine having variable throat

摘要

The invention relates to a turbine ( 1 ) for a turbocharger, comprising a turbine wheel ( 2 ) and a turbine housing ( 5 ) forming a passage ( 6 ) for guiding a fluid flow to the turbine wheel ( 2 ), said passage ( 6 ) comprising a variable throat providing a throat area ( 8 ) as a smallest cross section of the fluid flow, wherein the variable throat is always defined by a annular member ( 7 ) surrounding the turbine wheel ( 2 ) and being movable in the axial direction of the turbine wheel ( 2 ).