Patent ID: 9021803
Filing Date: 2015-05-05
Classification: F01D,F02B,F02M,F05D,Y02T

Abstract:
1. A turbine ( 10 ) for an exhaust gas turbocharger of an internal combustion engine having a turbine housing ( 12 ) with an accommodation space ( 28 ), a turbine wheel ( 26 ) rotatably supported in the accommodation space ( 28 ), the housing ( 12 ) further including a spiral channel ( 18 , 20 , 22 , 24 ) through which exhaust gas may flow, the spiral channel having a flow cross-section (A) for directing the exhaust gas flow onto the turbine wheel ( 26 ) which is supported in the accommodation space ( 28 ) so as to be rotatable about a rotational axis ( 30 ), at least one blocking element ( 40 ) arranged rotatably around the turbine wheel in the flow cross-section (A) and also being movable in the axial direction ( 36 ) of the turbine wheel ( 26 ) between at least a first, extended position and a second, retracted position, the turbine housing ( 12 ) having at least two ducts ( 14 , 16 ) and the turbine ( 10 ) being operable in an impulse turbine mode in the extended axial positions of the blocking element ( 40 ) and in a back-pressure or accumulation turbine mode in the retracted axial position of the blocking element ( 40 ), the turbine ( 10 ) having a throughput parameter (φ) which, in the impulse turbine mode, is adjustable by rotation of the blocking element ( 40 ) in the extended position and which, in the accumulation turbine mode, is adjustable by rotation of the blocking element ( 40 ) in its retracted position.