Abstract: A wastegate assembly for controlling flow of exhaust gas includes a valve element having a valve body and a valve shaft. The wastegate assembly further includes a spindle. The wastegate assembly further includes a washer coupled to the valve shaft and spaced from the spindle for securing the spindle to the valve shaft. A plurality of cup springs is disposed between the spindle and the washer. The plurality of cup springs includes at least a first cup spring and a second cup spring, with the first cup spring supported on the spindle head and the second cup spring orientated substantially identical to the first cup spring and disposed directly on the first cup spring.

Abstract: The invention relates to a valve assembly (10) for a charging device, in particular for a wastegate of an exhaust gas turbocharger, comprising a spindle (100), a lever arm (110) coupled to the spindle (100), and a valve unit (200). The lever arm (110) has a connecting element (112), designed as at least partially spherical, and the valve unit (200) has an accommodation region (212) with at least one first conical accommodation surface (214) in which the connecting element (112) is arranged.

Abstract: A wastegate assembly for controlling flow of exhaust gas includes a valve element having a valve body and a valve shaft. The wastegate assembly further includes a spindle having a head defining an opening and including a flat surface. The wastegate assembly further includes a washer coupled to the valve shaft and spaced from the spindle for securing the spindle to the valve shaft. The washer defines a bottom washer surface facing the flat surface of the spindle head, with the bottom washer surface including a flat region and a beveled region. A biasing member is disposed between the flat surface of the spindle and the flat and beveled regions of the washer. The beveled region extends oblique relative to the flat region for minimizing contact between the washer and the biasing member beyond the flat region.

Abstract: A wastegate assembly for controlling flow of exhaust gas includes a valve element having a valve body and a valve shaft. The wastegate assembly further includes a spindle having a head defining an opening and including a flat surface. The wastegate assembly further includes a washer coupled to the valve shaft and spaced from the spindle for securing the spindle to the valve shaft. The washer defines a bottom washer surface facing the flat surface of the spindle head, with the bottom washer surface including a flat region and a beveled region. A biasing member is disposed between the flat surface of the spindle and the flat and beveled regions of the washer. The beveled region extends oblique relative to the flat region for minimizing contact between the washer and the biasing member beyond the flat region.

Abstract: The invention relates to a valve assembly (10) for a charging device, in particular for a wastegate of an exhaust gas turbocharger, comprising a spindle (100), a lever arm (110) coupled to the spindle (100), and a valve unit (200). The lever arm (110) has a connecting element (112), designed as at least partially spherical, and the valve unit (200) has an accommodation region (212) with at least one first conical accommodation surface (214) in which the connecting element (112) is arranged.

Abstract: A wastegate assembly for controlling flow of exhaust gas includes a valve element having a valve body and a valve shaft. The wastegate assembly further includes a spindle. The wastegate assembly further includes a washer coupled to the valve shaft and spaced from the spindle for securing the spindle to the valve shaft. A plurality of cup springs is disposed between the spindle and the washer. The plurality of cup springs includes at least a first cup spring and a second cup spring, with the first cup spring supported on the spindle head and the second cup spring orientated substantially identical to the first cup spring and disposed directly on the first cup spring.

Abstract: A bypass valve for an engine with turbocharging for use in a pipe section of a bypass. The bypass valve has a sealing device which comprises a flap. The flap is mounted to be doubly rotatable via a first axis of rotation and via a second axis of rotation.

Abstract: The invention relates to a turbine wheel (1) composed of a turbine wheel blank (2), having a turbine wheel back (3) and having a weld peg (Z) which is arranged on the turbine wheel back (3) via a transition region (5) provided with an undercut (4), wherein the undercut (4) is already provided in the turbine wheel blank (2).

Abstract: The invention relates to a shaft assembly (1A) of an exhaust-gas turbocharger (1) having a shaft (5), having a turbine wheel (2) which can be connected to one end of the shaft (5) to form a rotor, having a compressor wheel (12) which can be connected to the other end of the shaft (5), having a sealing sleeve (14) which can be located on the shaft (5) on that side of the compressor wheel (12) which faces toward the turbine wheel (2), having a shaft nut (15) which can be screwed by means of an internal thread (17) onto a free end region (16) of the shaft (5) to fix the compressor wheel (12), wherein the shaft nut (15), in a portion (19) adjacent to the compressor wheel (12), has a turned recess (18) which adjoins the internal thread (17) and which has an inner diameter (D2) greater than the internal thread diameter (D1).

Abstract: A vane ring assembly which includes a lower vane ring (22), an upper vane ring (30), one or more guide vanes (80) positioned at least partially between the vane rings, and a plurality of spacers (42, or 50) positioned between the lower and upper vane rings for maintaining a distance between the lower and upper vane rings. By using a first set of fasteners (190) to fasten the lower vane ring to the turbine housing, and a second set of fasteners (191) to fasten the lower vane ring to the upper vane ring, the vane ring assembly is effectively decoupled from the turbine housing with regard to differential thermal expansion, and the co-planerism of the vane rings is easier to maintain.

Abstract: A vane ring assembly includes a lower vane ring (20), an upper vane ring (30), one or more guide vanes (80) positioned at least partially between the vane rings, and a spacer (50) positioned between the lower and upper vane rings (20, 30) for maintaining a distance between the lower and upper vane rings (20, 30). The spacer has a first end (52) with a first diameter, a second end (54) with a second diameter, and a middle section (56) with a third diameter. The third diameter is larger than the first and second diameters. The first and second ends (52, 54) of the spacer (50) are inserted at least partially into a first counter bore (22) and a second counter bore (32) formed in the lower and upper vane rings (20, 30). A nut (40) and a fastener (42) running through a central through hole (58) of the spacer (50) are used to connect the vane ring assembly to a turbocharger housing. A clearance (c) of greater than e.g.

Abstract: The invention relates to a shaft assembly (1A) of an exhaust-gas turbocharger (1) having a shaft (5), having a turbine wheel (2) which can be connected to one end of the shaft (5) to form a rotor, haying a compressor wheel (12) which can be connected to the other end of the shaft (5), having a sealing sleeve (14) which can be located on the shaft (5) on that side of the compressor wheel (12) which faces toward the turbine wheel (2), having a shaft nut (15) which can be screwed by means of an internal thread (17) onto a free end. region (16) of the shaft (5) to fix the compressor wheel (12), wherein the shaft nut (15), in a portion (19) adjacent to the compressor wheel (12), has a turned recess (18) which adjoins the internal thread (17) and which has an inner diameter (D2) greater than the internal. thread diameter (D1).

Abstract: The invention relates to a turbine wheel (1) composed of a turbine wheel blank (2), having a turbine wheel back (3) and having a weld peg (Z) which is arranged on the turbine wheel back (3) via a transition region (5) provided with an undercut (4), wherein the undercut (4) is already provided in the turbine wheel blank (2).

Abstract: A vane ring assembly which includes a lower vane ring (22), an upper vane ring (30), one or more guide vanes (80) positioned at least partially between the vane rings, and a plurality of spacers (42, or 50) positioned between the lower and upper vane rings for maintaining a distance between the lower and upper vane rings. By using a first set of fasteners (190) to fasten the lower vane ring to the turbine housing, and a second set of fasteners (191) to fasten the lower vane ring to the upper vane ring, the vane ring assembly is effectively decoupled from the turbine housing with regard to differential thermal expansion, and the co-planerism of the vane rings is easier to maintain.

Abstract: A vane ring assembly which includes a lower vane ring (22), an upper vane ring (30), one or more guide vanes (80) positioned at least partially between the vane rings, and a plurality of spacers (42, or 50) positioned between the lower and upper vane rings for maintaining a distance between the lower and upper vane rings. By using a first set of fasteners (190) to fasten the lower vane ring to the turbine housing, and a second set of fasteners (191) to fasten the lower vane ring to the upper vane ring, the vane ring assembly is effectively decoupled from the turbine housing with regard to differential thermal expansion, and the co-planerism of the vane rings is easier to maintain.

Abstract: A vane ring assembly includes a lower vane ring (20), an upper vane ring (30), one or more guide vanes (80) positioned at least partially between the vane rings, and a spacer (50) positioned between the lower and upper vane rings (20, 30) for maintaining a distance between the lower and upper vane rings (20, 30). The spacer has a first end (52) with a first diameter, a second end (54) with a second diameter, and a middle section (56) with a third diameter. The third diameter is larger than the first and second diameters. The first and second ends (52, 54) of the spacer (50) are inserted at least partially into a first counter bore (22) and a second counter bore (32) formed in the lower and upper vane rings (20, 30). A nut (40) and a fastener (42) running through a central through hole (58) of the spacer (50) are used to connect the vane ring assembly to a turbocharger housing. A clearance (c) of greater than e.g.

Abstract: A vane ring assembly which includes a lower vane ring (22), an upper vane ring (30), one or more guide vanes (80) positioned at least partially between the vane rings, and a plurality of spacers (42, or 50) positioned between the lower and upper vane rings for maintaining a distance between the lower and upper vane rings. By using a first set of fasteners (190) to fasten the lower vane ring to the turbine housing, and a second set of fasteners (191) to fasten the lower vane ring to the upper vane ring, the vane ring assembly is effectively decoupled from the turbine housing with regard to differential thermal expansion, and the co-planerism of the vane rings is easier to maintain.

Abstract: A guiding grid of variable geometry for turbines comprises a turbine housing and a plurality of guiding vanes in the housing in angular distances around a central axis. Each vane is pivotal about an associated pivoting axis to assume different angles in relation to the central axis and, thus, to form a nozzle of variable cross-section between each pair of adjacent vanes. A generally annular nozzle ring supports the adjustment shafts of the guiding vanes. A unison ring is displaceable around the central axis relative to the nozzle ring. This unison ring is operatively connected to the vanes via a transmission mechanism in order to pivot them when being displaced to adjust their respective angular position in relation to the central axis. The transmission mechanism comprises a first transmission element with an opening and a second transmission element slidably engaging this opening.

Abstract: A guiding grid of variable geometry for turbines comprises a turbine housing and a plurality of guiding vanes in the housing in angular distances around a central axis. Each vane is pivotal about an associated pivoting axis to assume different angles in relation to the central axis and, thus, to form a nozzle of variable cross-section between each pair of adjacent vanes. A generally annular nozzle ring supports the adjustment shafts of the guiding vanes. A unison ring is displaceable around the central axis relative to the nozzle ring. This unison ring is operatively connected to the vanes via a transmission mechanism in order to pivot them when being displaced to adjust their respective angular position in relation to the central axis. The transmission mechanism comprises a first transmission element with an opening and a second transmission element slidably engaging this opening.