Abstract: A method for producing a variable turbine geometry of a charging device may include inserting at least two guide blades into a blade mounting ring. The method may then include jointly machining at least two of the guide blades, in the mounted state, on respective end side of the at least two guide blades facing away from the blade mounting ring in order to produce a final shape of the end sides.

Abstract: A supercharging device includes a rotor mounted in a housing via an axial bearing disposed on an end side of the rotor. The axial bearing includes an axial bearing disc with a first bearing surface, a membrane with a central first opening, and a screw connection that secures the axial bearing disc to the membrane through the central first opening. The axial bearing further includes a bush with a central second opening, wherein the bush is connected to the housing and the membrane is clamped in between the bush and the housing, and an adjusting screw screwed into the central second opening of the bush, wherein the adjusting screw delimits and facilitates an axial movement of the screw connection and thus of the axial bearing disc.

Abstract: A variable geometry may include a blade bearing ring, guide blades mounted therein or thereon in a rotatable manner, and an adjustment ring for simultaneously adjusting the guide blades. The adjustment ring may be in operative connection with adjusting levers of the guide blades, and may be mounted on the blade bearing ring via rollers. A roll engagement may be provided for each roller, which may be guided into and may roll onto the respective roll engagement. Each roller may have two guide collars between which a groove runs and on which the roller may roll onto the blade bearing ring. A rail may be arranged on the blade bearing ring, and may engage in the groove between the two guide collars for each roller. Each roller may be retained on the blade bearing ring and on the adjustment ring exclusively via the guide collars of the respective roller.

Abstract: A bearing housing of an exhaust gas turbocharger may include an encircling and inwardly open groove arranged in the bearing housing. The bearing housing may also include a housing cover that may have at least one forming portion formed plastically into the groove. The housing cover may be secured on the bearing housing via the at least one forming portion.

Abstract: A valve device for controlling a bypass of an exhaust-gas turbocharger may include a valve disc for opening and closing a bypass opening of a turbine, and the bypass opening may be surrounded by a valve seat. A mandrel may protrude on a rear side of the valve disc. An adjusting lever for pivoting the valve disc may be connected with the mandrel. The adjusting lever may have a through opening that may be pierced by the mandrel. The through opening may be radially limited by an interior surface of the adjusting lever. At least one spring element may be arranged in the through opening, and the at least one spring element may subject the mandrel to a radial force.

Abstract: A rotor for a supercharging device may include a compressor wheel and a turbine wheel. A sealing disc may be arranged between the compressor wheel and the turbine wheel. The sealing disc may include a first side interfacing with the compressor wheel and a second side interfacing with the turbine wheel. The compressor wheel and the turbine wheel may each define one of a holding contour and a counter-holding contour, which respectively interact with a corresponding one of a holding contour and a counter-holding contour defined on each of the first side and the second side of the sealing disc. The respective holding contour may correspond to the respective counter-holding contour, which may engage in one another and secure the compressor wheel, the sealing disc and the turbine wheel to one another.

Abstract: A turbine for a supercharging device of an internal combustion engine may include a turbine wheel which is rotatably arranged about an axis of rotation in a turbine housing. A radial inflow channel may be arranged coaxially to the turbine wheel, which leads to a radial inlet region of the turbine wheel. The inflow channel may be axially bounded on one side by a blade carrier and axially bounded on the other side by a cover disc. A plurality of guide blades may be pivotably arranged on the blade carrier, and a plurality of spacer elements may axially project from the blade carrier. An axial outflow channel may be arranged coaxially to the turbine wheel, which leads from the inlet region to an axial outlet region of the turbine wheel, which may be radially bounded by an inner contour formed complementary to an outer contour of the rotating turbine wheel.

Abstract: An exhaust gas turbocharger may include a turbine housing and a turbine. The turbine housing may include at least two exhaust gas channels and a partition. A wastegate valve may be arranged such that the at least two exhaust gas channels are connectable to a bypass duct bypassing the turbine. The wastegate valve may include a hollow valve body and a valve seat interacting with the valve body. The wastegate valve may be configured such that at least one of ram supercharging and pulse supercharging is performed. A connecting opening may be arranged between the at least two exhaust-gas channels. The valve body may have a base region configured to facilitate a discharging of an exhaust-gas steam into the bypass duct and/or an overflowing of one exhaust gas channel through the connecting opening into the other exhaust-gas channel.

Abstract: A method of producing a rotor of a charging apparatus may include the steps of providing at least one compressor wheel and a turbine wheel. The compressor wheel and the turbine wheel may each include a bearing section having a radial bearing surface at a longitudinal end for mounting a bearing housing. At least one of the radial bearing surfaces may include a radial oversizing corresponding to a rotationally asymmetric geometry between at least the bearing section of the compressor wheel and the bearing section of the turbine wheel. The method may include the step of assembling the compressor wheel, the turbine wheel and each bearing section together to form a unitary structure, and machining the at least one of the radial bearing surfaces to reduce the respective radial oversizing until each of the radial bearing surfaces are rotationally symmetrical with respect to each other.

Abstract: A rotor for a supercharging device may include an arrangement; the arrangement may include a compressor wheel operatively coupled to a turbine wheel. A cup-shaped bearing bush configured to receive a radial air bearing may be arranged on at least one longitudinal end of the arrangement. The bearing bush may define an interior including at least one hollow space and a plurality of stiffening ribs extending into the at least one hollow space.

Abstract: An actuating device for a valve of an exhaust-gas turbocharger may include a lever arm and a flap plate connected to one another for closing and opening the valve. The flap plate may have a concave recess, and the lever arm may have a spherical region configured in a complimentary manner to the concave recess of the flap plate. A holding device may be disposed on the flap plate and engage around the spherical region of the lever arm to secure the flap plate on the lever arm. The holding device may include at least two holding elements and a connecting element that connects the at least two holding elements.

Abstract: An exhaust gas turbocharger may include a turbine housing and a turbine wheel. The turbine wheel may include a first quantity of a plurality of moving blades. The turbine wheel may be rotatable relative to the turbine housing about a turbine wheel center of rotation and have a turbine wheel radius. A variable turbine geometry may include a blade bearing ring on which a second quantity of a plurality of guide blades are rotatably mounted in each case about a guide blade center of rotation. The plurality of guide blades may be adjustable between a closed position, in which a flow cross section between the guide blades for an exhaust gas to flow through is at a minimum, and an opened position, in which the flow cross section is at a maximum.

Abstract: An exhaust gas turbocharger may include a shaft mounted in a bearing housing carrying a compressor wheel and a turbine wheel. The shaft may include a sealing bush arranged on the shaft in a rotationally fixed manner. The sealing bush together with a bearing housing cover may at least partially delimit an annular oil centrifuging space arranged coaxially to the sealing bush. The bearing housing cover may include a guiding nib located radially outside the sealing bush partially covering the sealing bush in axial direction. The guiding nib may be configured to guide oil separated in the oil centrifuging space onto the rotating sealing bush. The rotating sealing bush may be configured to direct the oil into the oil centrifuging space in response to centrifugal force creating an oil swirl.

Abstract: A rotor for at least one of a turbine and a compressor of a supercharging device may include a shaft defining an axis of rotation and at least one impeller. The at least one impeller may have a thread which is arranged coaxially to the axis of rotation. The shaft may include a complementary thread which is arranged coaxially to the axis of rotation. The shaft and the at least one impeller may be secured together via the respective threads. The shaft and the at least one impeller may be fixed with respect to one another via at least one of a soldered connection, a welded connection, an adhesive bond, a clamped connection and a crystallization connection.

Abstract: An exhaust gas turbocharger for an internal combustion engine may include a rotor with a turbine wheel of a turbine, a compressor wheel of a compressor and a shaft. The shaft may be connected to the turbine wheel and to the compressor wheel in a rotationally fixed manner. A bearing cartridge may be included for mounting the rotor in a housing. The bearing cartridge may have an inner sleeve arranged on the shaft axially between the turbine wheel and the compressor wheel with respect to an axis of rotation and an outer sleeve arranged coaxial thereto. The outer sleeve may be rotatably mounted on the inner sleeve via at least one rolling body. At least two damping rings may be included which are coaxially arranged on the outer sleeve axially spaced from one another and supported on a respective bearing section of the housing.

Abstract: A charging device for an exhaust gas turbocharger of an internal combustion engine may include at least one variable turbine and compressor geometry and an adjusting device for adjusting the at least one variable turbine and compressor geometry. The adjusting device may include a minimum set limit, which defines a minimum set flow of the at least one variable turbine and compressor geometry for an exhaust gas driving the charging device, and a maximum set limit, which defines a maximum set flow of the at least one variable turbine and compressor geometry for the exhaust gas driving the charging device. The adjusting device may be designed such that at least one minimum set limit of the adjusting device and the maximum set limit of the adjusting dive are variably adjustable and readjustable.

Abstract: A bearing for a turbocharger may include an annular body and a centrally arranged passage opening for bearing a shaft at least one of axially and radially with respect to a rotation axis. The body may include at least one segment extending at least partially about the passage opening in a circumferential direction. The at least one segment may include an oil pocket, a circumferentially extending wedge surface and a detent surface circumferentially spaced from the oil pocket. The segment may also include a radially inner flange extending at least partially along the wedge surface in the circumferential direction. The inner flange may define an inner sealing web that may continue uninterruptedly into the detent surface.

Abstract: A bearing for an exhaust gas turbocharger may include an annular body and a centrally arranged passage opening for bearing a shaft at least one of axially and radially with respect to a rotation axis. The body may include an oil pocket, a wedge surface extending at least partially in a circumferential direction, and a detent surface circumferentially spaced from the oil pocket via the wedge surface. The detent surface may include a predetermined wear height configured to be worn down over an operating lifespan of the bearing. A radially inner flange may extend at least partially along the wedge surface in the circumferential direction and define an inner sealing web. A radially outer flange may extend at least partially along the wedge surface in the circumferential direction and define an outer sealing web.

Abstract: The invention relates to a radial compressor (1) for an exhaust gas turbocharger, in particular of an internal combustion engine, with a compressor housing (2) comprising an axial inlet channel (3) and a radial outlet channel (4), with a compressor wheel (6) for delivering and compressing a gas, wherein the compressor wheel (6) has an axial inlet side (7) facing the inlet channel (3), a radial outlet side (8) facing the outlet channel (4) and an axial wheel surface contour (9), which extends from the inlet side (6) as far as to the outlet side (7), with an adapter element (10) which is substantially designed sleeve-like, which can be axially introduced into a fastening section (11) provided on the compressor housing (2), wherein the adapter element (10) at least in sections has a surface contour (13), which is designed substantially complementarily to the axial wheel surface contour (9), so that by axially moving the adapter element (10) in the fastening section (11) a gap width (w) of a passage gap (14) a

Abstract: The invention relates to a turbine (1), in particular of an exhaust gas turbocharger, having a turbine rotor (4), which is rotatably mounted in a housing (2), with which at least one radial inlet channel (9) for a guide apparatus (7) forming a medium which drives the turbine rotor (4) is associated, wherein said guide apparatus (7) has multiple guide vane bearing rings (10), which radially enclose said turbine rotor (4) and have guide vanes (8) which lie in said inlet channel (9), and a guide vane cover ring (12), and wherein said inlet channel (9) is axially delimited by said guide vane bearing ring (10) and said guide vane cover ring (12) and said guide apparatus (7) is mounted in the housing (2) so it is axially and/or radially movable for material relaxation. Furthermore, the invention relates to an exhaust gas turbocharger, in particular for a motor vehicle.