Patent ID: 8186943

Claim:
An exhaust-gas turbine of an exhaust-gas turbocharger ( 2 ) having a turbine housing with a turbine wheel ( 14 ) rotatably supported in the housing and a turbine inlet channel ( 16 ) via which exhaust gas can be supplied to the exhaust-gas turbine ( 3 ) and a turbine outlet duct ( 13 ) formed by a contour sleeve ( 20 ) for discharging exhaust gas from the turbine, the turbine inlet channel ( 16 ) having an inlet cross section ( 15 ) which is formed at a transition from the inlet channel ( 16 ) to the turbine wheel ( 14 ) between two laterally opposite delimiting walls ( 24 , 25 ), a guide vane structure ( 17 ) disposed in the turbine inlet channel ( 16 ) so as to extend across the inlet cross-section ( 15 ) and an axial slide ( 19 ) movably supported on the contour sleeve ( 20 ), the delimiting wall ( 24 ) of the turbine inlet cross section ( 15 ) remote from the outlet duct ( 13 ) being axially flush with the wheel blades of the turbine wheel ( 14 ) for smoothly guiding the exhaust gas to the turbine wheel ( 14 ), and a discharge opening ( 22 ) extending through the contour sleeve ( 20 ) from the turbine inlet cross section ( 15 ) to the outlet duct ( 13 ) and being arranged so as to be open when the axial slide ( 19 ) is in a retracted, maximum open position, the axial slide ( 19 ) having an opposite blocking position in which it extends over the vane structure ( 17 ) and essentially closes the effective turbine inlet cross section ( 15 ), the guide vane structure ( 18 ) extending axially across the discharge opening ( 22 ) so that, when the axial slide ( 19 ) is in the maximum open position, exhaust gas discharged via the discharge opening ( 22 ) is conducted through the guide vane structure ( 17 ).