Abstract: The invention relates to a method for operating an internal combustion engine in the form of a spark-ignition engine (2) having the following method steps: pre-compressing the air supplied to the combustion chambers (15A-15D) of the internal combustion engine (2), directly injecting fuel into the combustion chambers (15A-15D) of the internal combustion engine (2), and adjusting the valve overlap of the gas exchange valves corresponding to the load range in which the internal combustion engine (2) is operated, characterized by the following method step: carrying out the pre-compression in a charging device in the form of an exhaust-gas turbocharger having a turbine (5) with variable turbine geometry (VTG), wherein the engine exhaust gas is supplied to the turbine (5) via separate spiral ducts (17A, 18A; 17B, 18B) of a multi-flow turbine housing (16A; 16B).

Abstract: The invention relates to a method for operating an internal combustion engine in the form of a spark-ignition engine (2) having the following method steps: pre-compressing the air supplied to the combustion chambers (15A-15D) of the internal combustion engine (2), directly injecting fuel into the combustion chambers (15A-15D) of the internal combustion engine (2), and adjusting the valve overlap of the gas exchange valves corresponding to the load range in which the internal combustion engine (2) is operated, characterized by the following method step: carrying out the pre-compression in a charging device in the form of an exhaust-gas turbocharger having a turbine (5) with variable turbine geometry (VTG), wherein the engine exhaust gas is supplied to the turbine (5) via separate spiral ducts (17A, 18A; 17B, 18B) of a multi-flow turbine housing (16A; 16B).

Abstract: A fluid flow engine comprises a guiding grid in a housing arrangement for housing a turbine wheel. The housing arrangement has a central discharge channel for the fluid driving the turbine wheel. A ring of guiding vanes located around a central axis is mounted to a support ring round the central axis. The support ring is inserted into the housing arrangement and is fastened in an axially and a radially moveable manner to the housing arrangement by a appropriate fastening device which enables such mobility.

Abstract: A fluid flow engine comprises a guiding grid in a housing arrangement for housing a turbine wheel. The housing arrangement has a central discharge channel for the fluid driving the turbine wheel. A ring of guiding vanes located around a central axis is mounted to a support ring around the central axis. The support ring is inserted into the housing arrangement and is fastened in an axially and a radially moveable manner to the housing arrangement by a appropriate fastening device which enables such mobility.