Abstract: An actuating drive for a bi-directionally adjustable actuator for at least on of an exhaust gas recirculation device and an exhaust gas turbocharger. The actuating drive includes an electric motor; a toggle lever, which articulates with the actuator via a first toggle lever bearing; and a gear mechanism, connecting the electric motor with the toggle lever, wherein the gear mechanism includes a toothing element on an output side mounted in a pivot bearing, wherein the toggle lever is articulating mounted via a second toggle lever bearing, wherein in a starting state of the actuating drive is associated with a starting position of the actuator, and wherein an acute angle exists between a first straight line extending through the first toggle lever bearing and through the second toggle lever bearing, and a second straight line extending through the pivot bearing and through the second toggle lever bearing.

Abstract: A charging device may include a shaft rotatably mounted on at least one slide bearing in a shaft bearing region. At least one flow opening for introducing and discharging a fluid may be defined on the shaft bearing region, wherein the shaft in the shaft bearing region may have two outer portions each running in a circumferential direction and axially binding an inner portion. At least one of the outer portions on its surface may include at least one microstructure.

Abstract: A variable turbine geometry may have guide blades rotatably mounted in a blade bearing ring. An adjusting ring may be arranged on the bearing ring and an actuator may be configured to adjust the adjusting ring via a link lever. An adjustable eccentric may be arranged on the link lever and guided in a groove arranged on the blade bearing ring. The eccentric may be configured to stop on at least one end of the groove to limit at least one minimal flow through the variable turbine geometry.

Abstract: An exhaust-gas turbocharger may include a rotor shaft arranged with at least one bearing-shaft portion in a radial bearing. The radial bearing may be a plain bearing configured to slide on a fluid film. The at least one bearing-shaft portion may be subdivided into two outer segments by an inner segment. The two outer segments may be arranged on the respective axial end region of the radial bearing and the inner segment may be positioned between the outer segments. The inner segment may be arranged in the area of an opening of a fluid channel. The turbocharger may include at least one transverse groove running inclined relative to the circumferential direction of the rotor shaft arranged in at least in one of the outer segments. The at least one transverse groove may include a groove depth having a continuously decreasing development in a fluid flow direction.

Abstract: An exhaust-gas turbocharger for an internal combustion engine is described herein, in particular for a motor vehicle. An exhaust-gas side sacrificial sealing ring that serves as a heat shield is replaced by a step formed in a housing and in a hub, the step serving to assume the function of a heat shield instead of the sacrificial sealing ring. This design feature reduces production costs in connection with the outlay for the sacrificial sealing ring.

Abstract: A limit stop device for limiting an adjustment path of a mobile component relative to a stationary component may include a sleeve body configured to be inserted into an opening formed in the stationary component. The sleeve body may include a retaining segment disposed in the interior of the opening. A core body may be disposed in the interior of the sleeve body and be configured to radially brace the retaining segment against an inner wall of the stationary component thereby axially fixing the sleeve body on the stationary component. A stop surface may protrude into the adjustment path of the mobile component and be configured to limit the adjustment path of the mobile component.

Abstract: The present invention relates to an adjustment device (1) for adjusting a valve or a flap, in particular a pressure nozzle for actuating a bypass valve when a limit charge pressure on an exhaust-driven turbocharger is exceeded, which comprises a single- or multi-part housing (2), in particular a housing (2) having a housing lower part (3) and a housing lid. Essential to the invention is that a clip device (4) is provided, by means of which the adjustment device (1) is fastened to a part (6).

Abstract: Charging equipment is disclosed, comprising a variable turbine geometry, and a plurality of guide vanes rotatably mounted between at least one of a guide vane carrier, a cover disc and a turbine housing. The guide vane carrier is positioned on at least one of the cover disc and on the turbine housing by at least one spacer. The geometry has at least two different types of flow channels, a first flow channel wherein flow is influenced by the spacer, and a second flow channel wherein flow is not influenced by the spacer. The first flow channel guide vanes have a radial distance (R1) to a turbine wheel axis, and to a distance from an adjacent guide vane are configured and adjusted such that a gas flow from the first flow channel meeting the turbine wheel corresponds to a gas flow from the second flow channel meeting the turbine wheel.

Abstract: The invention relates to a variable turbine geometry (12) of a supercharging device, in particular an exhaust gas turbocharger for an internal combustion engine. The variable turbine geometry (12) comprises guide vanes (30) that are assigned to the circumference of a turbine rotor and are operated by means of a control ring (22) that is accommodated on journals (16) of the guide vanes (30). The control ring (22) is locked on these supporting journals (16) of the guide vanes (30).

Abstract: An exhaust-driven turbocharger for a motor vehicle may include a bearing housing and a turbine housing, which are mounted in the bearing house by means of a common shaft. A guide vane cage surrounds the turbine wheel. The guide vane cage may have at least two arms. The arms may be used to help secure the guide vane cage between the bearing housing and the turbine housing such that it can move in the radial direction.

Abstract: The invention relates to a variable turbine geometry (28) of an exhaust gas turbocharger (2) of a motor vehicle, with a fixed guide blade ring (20) and an axially moveable control blade ring (15), wherein an axial relative position of guide blades (21) of the guide blade ring (20) to control blades (15) of the control blade ring (13) defines the size of inflow cross sections to a turbine wheel (11) of the exhaust gas turbocharger (2), and wherein the guide blades (21) and the control blades (15) extend in directions opposite to each other as far as to their respective free ends (18) and the control blades (15) are arranged on a cross carrier of the control blade ring (13), which as a function of the axial relative position opens, partially opens or closes additional inflow paths (29) for the enlargement or the reduction of the inflow cross sections.

Abstract: The invention relates to a radial compressor for a turbocharger (5), in particular for an internal combustion engine, with a compressor wheel (4) for conveying and compressing a gas, which has an axial intake end (7) and a radial exhaust end (8), with a compressor wheel space (3), in which the compressor wheel (4) is arranged and which extends from the intake end (7) to the exhaust end (8), with an inlet port (10) leading to the intake end (7) of the compressor wheel (4), with at least one recirculation path (12) which opens at one end into the inlet port (10) and at the other end into the compressor wheel space (3). To increase the efficiency of the compressor (1) and/or the charger (5) equipped with the compressor, a control device (15) is provided for varying the flow-through cross section, namely at least opening and closing the flow-through cross section, of the at least one recirculation path (12).

Abstract: The invention relates to a turbine, in particular of an exhaust-gas turbocharger, comprising a turbine rotor which is supported rotatable in a housing, and to which at least one guide vane apparatus forming a radial inlet channel for a medium driving the turbine rotor is allocated, wherein the guide vane apparatus comprises a guide vane mounting ring with a plurality of guide vanes which radially surround the turbine rotor and which are located within the inlet channel, as well as a guide vane cover ring, and wherein the inlet channel is axially bounded by the guide vane mounting ring and the guide vane cover ring, and the guide vane cover ring abuts with a front side facing away from the inlet channel against a support area of the housing. The invention provides that the housing (5) comprises in the support area (15) at least one recess (17) which is open-edged towards the guide vane cover ring (9), and through which the medium can flow.

Abstract: The present disclosure relates to an exhaust gas turbocharger for a motor vehicle. The turbocharger includes a turbine housing having a first area in which exhaust is carried to a turbine wheel and in which the turbine wheel is essentially situated and having a second area connected axially to the first area, such that the first area and the second area are essentially separated from one another by a separating element. It is provided that for thermal insulation, the separating element is made of a material having a low thermal conduction and/or thermal capacity.