Abstract: In a turbine for an exhaust gas turbocharger with a turbine casing having a receiving chamber for accommodating a turbine wheel and at least one volute through which the exhaust gas is guided via a feed passage into the receiving chamber and wherein at least one guide element is provided in the turbine casing so as to project into the feed passage in a guide region for guiding the exhaust gas onto the turbine wheel, the guide element comprises a first length region in the axial direction of the turbine, in which the guide element is designed with respect to its aerodynamic properties differently from its aerodynamic design in a second length region adjoining the first length region.

Abstract: In an exhaust gas turbine with a guide section for the exhaust gas turbine comprising a flow-through duct for conducting exhaust gas through the exhaust gas guide section, wherein the flow-through duct includes a wheel chamber in which a turbine wheel is rotatably supported and wherein, downstream of the wheel chamber, the flow-through duct has an outlet portion and upstream of the wheel chamber, the flow-through duct has an inlet portion with a bypass duct being formed in the exhaust gas guide section for by-passing the wheel chamber, the by-pass duct forms an annular opening adjacent the turbine wheel for directing by-pass exhaust gas into the exhaust gas outlet portion in an annular flow pattern along the outlet portion duct wall.

Abstract: In a turbine for an exhaust gas turbocharger with a turbine casing having receiving chamber for accommodating a turbine wheel and at least one volute through which the exhaust gas is guided via a feed passage into the receiving chamber and wherein at least one guide element is provided in the turbine casing so as to project into the feed passage in a guide region for guiding the exhaust gas onto the turbine wheel, the guide element comprises a first length region in the axial direction of the turbine, in which the guide element is designed with respect to its aerodynamic properties differently from its aerodynamic design in a second length region adjoining the first length region.

Abstract: In an exhaust gas turbocharger for an internal combustion engine, including a turbine housing and a rotor, the housing having an exhaust gas guide section and the rotor including a turbine wheel and a shaft connected to the turbine wheel which is driven by exhaust gas, and a control device for controlling the exhaust gas flow to the turbine wheel comprising an annular guide vane structure and an axial slide supported on a contour sleeve mounted to the turbine housing remote from the rotor and extending toward the rotor and forming also the turbine exhaust gas discharge duct, the axial slide includes a cavity accommodating the guide vane structure.

Abstract: In a diffuser for a turbocharger having an adjustable turbine geometry wherein the diffuser comprises an axial slide and an adjusting device for moving the axial slide and wherein the adjusting device comprises an adjusting fork having an opening with a guide axis for the accommodation of a guide element and the adjusting device further comprises an adjusting lever with a lever end, the lever end is accommodated in a recess of the adjusting fork which is disposed at a side of the adjusting fork facing the axial slide in order to minimize tilting forces and provide for smooth sliding movement of the fork.

Abstract: In an exhaust gas turbocharger turbine for an internal combustion engine having a housing including a turbine wheel rotatably supported in the housing, wherein the housing has an exhaust gas flow guide section including an exhaust gas flow control arrangement with a guide vane structure for directing exhaust gas onto the turbine rotor, an adjustment mechanism with an axially movable control slide is provided which is movable by an operating fork which is slidably supported on a guide element and engages the control slide at opposite sides so as to prevent cogging of the movable control slide during movement into, and out of, the exhaust gas flow guide section.

Abstract: In an exhaust-gas turbine of an exhaust-gas turbo-charger including a turbine wheel which is rotatably supported in a housing and to which exhaust gas can be supplied via an inlet channel and discharged out of the exhaust-gas turbine via an outlet duct, wherein a guide vane structure and an axial slide which interacts with the latter, are disposed in the turbine inlet at the transition from the inlet channel to the turbine wheel, the guide vane structure is fixedly mounted with respect to the housing and the axial slide is arranged at the turbine outlet side and is movably supported on an outlet duct contour sleeve and provided with an axial opening for accommodating the guide vane structure, and the contour sleeve includes openings which conduct exhaust gas from the inlet channel directly to the outlet duct and which are arranged so that they are covered by the axial slide when the axial slide is moved out of its open position, the guide vane structure extending axially over the contour sleeve openings so as

Abstract: An exhaust gas turbocharger for an internal combustion engine has a compressor arranged in an intake tract of an internal combustion engine for precompression of air passing through the intake tract to the compressor. A switchable air guiding device is arranged upstream of the compressor, wherein the switchable air guiding device supplies an air flow to the compressor in at least two different ways. The air guiding device has at least two components, wherein the at least two components are substantially made from plastic material.

Abstract: In an internal combustion engine with a high pressure exhaust gas turbocharger and a low pressure exhaust gas turbocharger connected in series, a bypass line including a blow-off valve extending around the high pressure and connected to the turbine of the low pressure exhaust gas turbocharger so that the exhaust gas can be conducted into a first inlet flow passage of the low pressure turbine in radial direction of the turbine wheel, the low pressure exhaust gas turbocharger comprises a second inlet flow by means of which the exhaust gas from the high pressure is directed onto the turbine wheel of the low pressure exhaust gas turbocharger in an axial or semi-axial flow direction.

Abstract: In an exhaust gas turbocharger for an internal combustion engine having a turbine wheel connected, by means of a shaft, to the compressor wheel of a compressor which includes a variable inlet geometry comprising a plunger and a sleeve-shaped partition for controlling an auxiliary duct leading radially to the compressor wheel, which is provided with compressor wheel blades to which air is supplied axially via an axial inlet passage and radially via a radial wheel inlet area, the compressor wheel includes a contoured ring provided at its outer circumferential surface with auxiliary blades disposed over, and aligned with, the compressor wheel blades in the radial and the axial wheel inlet region of the compressor wheel.

Abstract: In an exhaust gas turbocharger for an internal combustion engine, including a turbine housing and a rotor, the housing having an exhaust gas guide section and the rotor including a turbine wheel and a shaft connected to the turbine wheel which is driven by exhaust gas, and a control device for controlling the exhaust gas flow to the turbine wheel comprising an annular guide vane structure and an axial slide supported on a contour sleeve mounted to the turbine housing remote from the rotor and extending toward the rotor and forming also the turbine exhaust gas discharge duct, the axial slide includes a cavity accommodating the guide vane structure.

Abstract: In an engine braking method and an internal combustion engine including an engine braking arrangement, wherein the engine has high pressure and low pressure exhaust gas turbochargers connected in series, with a bypass (12) around the high-pressure compressor allowing the air mass flow selectively to bypass the high pressure compressor which is arranged near the engine, and bypasses around both turbines permitting the exhaust gas mass flow selectively to bypass the high-pressure exhaust gas turbine which is near the engine and also the low pressure turbine the intake air and the exhaust gas flow are controlled so as to accurately provide for a desired engine braking power for example for maintaining a desired vehicle speed.

Abstract: In a rotor assembly for an exhaust gas turbocharger including a turbine wheel and a compressor wheel mounted on a common shaft for joint rotation wherein the turbine wheel consist of a metal aluminide or of a high-temperature resistant titanium alloy, the turbine wheel and the compressor wheel are disposed on the shaft in spaced relationship by way of a bearing sleeve via which the turbien wheel and the compressor wheel are axially firmly engaged by axial clamping structures associated with the common shaft.

Abstract: In an exhaust gas turbocharger turbine for an internal combustion engine having a housing including a turbine wheel rotatably supported in the housing, wherein the housing has an exhaust gas flow guide section including an exhaust gas flow control arrangement with a guide vane structure for directing exhaust gas onto the turbine rotor, an adjustment mechanism with an axially movable control slide is provided which is movable by an operating fork which is slidably supported on a guide element and engages the control slide at opposite sides so as to prevent cogging of the movable control slide during movement into, and out of, the exhaust gas flow guide section.

Abstract: In an exhaust gas turbocharger for an internal combustion engine including an exhaust gas turbine in the exhaust line and a compressor in the intake tract of the internal combustion engine, and the exhaust gas turbine includes a gas inlet passage with a variable guide vane structure supported on one side of a support ring arranged in the inlet flow passage to the turbine wheel, the support ring is mounted in a floating manner such that the side thereof, which faces away form the guide vanes is exposed to the gas pressure in the inlet flow passage in order to bias the support ring toward the opposite inlet flow passage wall and spacer sleeves with expansion properties similar to those of the guide vanes are provided between the support ring and the opposite flow passage wall for delimiting the clearance between the guide vanes and the opposite flow passage wall.

Abstract: An exhaust gas turbocharger for an internal combustion engine has a compressor arranged in an intake tract of an internal combustion engine for precompression of air passing through the intake tract to the compressor. A switchable air guiding device is arranged upstream of the compressor, wherein the switchable air guiding device supplies an air flow to the compressor in at least two different ways. The air guiding device has at least two components, wherein the at least two components are substantially made from plastic material.

Abstract: In a compressor of an exhaust gas turbocharger of an internal combustion engine including a compressor wheel with an auxiliary rotor wheel which is rotatably supported adjacent to, and upstream of, the compressor wheel and which is movable axially between a coupled position with the compressor wheel and a decoupled position, wherein, in the coupled position, the auxiliary rotor wheel is rotationally connected to the compressor wheel, without contacting the compressor wheel, by means of a magnetic clutch for transferring a torque from the auxiliary rotor wheel to the compressor wheel in a low engine power operating range in order to maintain the compressor wheel at an increased speed.

Abstract: A method for producing a contoured gap between a rotor and a stator of a turbo-engine is provided. A first turbo-engine drives a second turbo-engine by means of a common shaft, the shaft being mounted in a bearing housing by means of a bearing. The aim of the invention is to enable the contoured gap to be created in a simple and reliable manner. To this end, the contoured gap is formed between a contoured surface of the rotor and a contoured surface of an engine housing associated with the rotor, by grinding the contoured surfaces against each other, using the axial play of the bearing.

Abstract: In a compressor of an exhaust gas turbocharger for an internal combustion engine including a compressor wheel which is rotatably mounted in a compressor inlet duct and an auxiliary rotor wheel arranged so as to be movable axially between a coupled position in engagement with the compressor wheel and a decoupled position, disengaged from the compressor wheel, an adjustable guide vane structure is provided which is movable by an adjusting element together with the auxiliary rotor wheel and a contoured flow control ring for controlling the combustion air flow to the compressor wheel and to the auxiliary rotor wheel.

Abstract: A method for connecting a first component from a metal aluminide or a refractory Ti alloy to a second component from steel, metal aluminide or a refractory Ti alloy, especially from a steel shaft, by friction welding is disclosed. An intermediary from an Ni alloy is inserted between the first component and the second component and friction welding is carried out. A connecting layer is produced from the intermediary and is firmly connected on both ends to the first and the second component. A turbocharger rotors and valves for internal combustion engines produced by the disclosed method is also provided.