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An exhaust gas turbocharger has a movable control piston in a turbine casing. The piston is made up of a circular cylindrical body, subjected to exhaust gas pressure, or external pressure and a volute body. The volute body has substantially the cross section of the inlet volute space and adjusts the

An exhaust gas turbocharger has a movable control piston in a turbine casing. The piston is made up of a circular cylindrical body, subjected to exhaust gas pressure, or external pressure and a volute body. The volute body has substantially the cross section of the inlet volute space and adjusts the volume of the latter to the current exhaust gas flow in order to achieve optimum torque variation over the load range of the engine.

대표청구항 ▼

An exhaust gas turbine for an exhaust gas turbocharger, comprising: a turbine casing surrounding the turbine wheel that is mounted on the rotor shaft and having an inlet volute space; wall element means movable along the rotor shaft axis in a cylindrical part of said inlet volute space, said wall el

An exhaust gas turbine for an exhaust gas turbocharger, comprising: a turbine casing surrounding the turbine wheel that is mounted on the rotor shaft and having an inlet volute space; wall element means movable along the rotor shaft axis in a cylindrical part of said inlet volute space, said wall element means being arranged for altering the volume and the flow cross section of the inlet volute space for the exhaust gases of the engine, said wall element means including a control piston having: a circular cylindrical body, which is guided in at least one circular cylindrical bore of the turbine casing, and a cylindrical volute body, whose cross section substantially corresponds to the cross section in the cylindrical part of the inlet volute space normal to the rotor shaft axis and is guided in this cylindrical part; and spring means for biasing the control piston in the direction towards the inlet volute space.