Abstract: A rotor assembly for a turbomachine having a permanent magnet electric motor that defines an axis of rotation includes a jacket member. The rotor assembly also includes a magnet member that is received within the jacket member. The magnet member has a first longitudinal end and a second longitudinal end that are separated along the axis of rotation. The rotor assembly also includes a first shaft structure that is attached to the first longitudinal end and a second shaft structure that is attached to the second longitudinal end. The magnet member is solitary and unitary and has a solid core.

Abstract: A rotor of a fluid machine includes a wheel with a plurality of blades. Furthermore, the rotor includes an inter-blade area defined circumferentially between a first blade and a second blade of the plurality of blades with respect to the axis of rotation. Moreover, the rotor includes a balancing mark on the wheel and within the inter-blade area. The balancing mark is elongate and has a first end and a second end. The first end and the second end are stepped axially into the inter-blade area. The balancing mark extends arcuately between the first end and the second end. The balancing mark has a depth that varies as the balancing mark extends arcuately between the first end and the second end. The balancing mark has a width that varies as the balancing mark extends arcuately between the first end and the second end.

Abstract: A turbomachine includes a housing with an e-machine housing. Also, the turbomachine includes a rotating group supported for rotation within the housing. Moreover, the turbomachine includes an e-machine that is configured as at least one of an electric motor and an electric generator, that is operatively coupled to the rotating group, and that includes a stator that is housed within the e-machine housing. Furthermore, the turbomachine includes a thermal bridge member that extends between the stator and the e-machine housing to define a thermal path for heat to transfer from the stator to the e-machine housing. The e-machine housing includes a thermal bridge retainer member that defines an outer boundary of the thermal bridge member.

Abstract: A turbocharger includes a housing and a rotating group supported for rotation within the housing. The rotating group includes a compressor wheel disposed within a compressor section of the turbocharger, and the rotating group includes a turbine wheel disposed within a turbine section of the turbocharger. The turbine wheel includes a bleed pressure surface. The turbocharger further includes a bleed passage that extends at least partly through the housing to fluidly connect the compressor section to the turbine section. The bleed passage is configured to direct a bleed flow of fluid from the compressor section to the bleed pressure surface to supply a thrust counterbalance load to the bleed pressure surface.

Abstract: A multi-stage charging device includes a shaft that is supported for rotation about an axis. The charging device also includes a first compressor wheel of a first compressor stage. The first compressor wheel is fixed on the shaft. Furthermore, the charging device includes a second compressor wheel of a second compressor stage. The second compressor wheel is fixed on the shaft. Additionally, the charging device includes a turbine wheel of a turbine section. The turbine wheel is fixed on the shaft in a back-to-back arrangement with the second compressor wheel.

Abstract: A compressor device includes a coolant jacket cooperatively defined by a motor case and an outer motor housing. The coolant jacket includes a radial portion that spans about the motor case in a circumferential direction and an axial direction with respect to the axis of rotation of the motor. The coolant jacket includes an axial portion that spans in a radial direction across an axial end of the motor case. At least one of the plurality of flow passages fluidly connects the radial portion and the axial portion.

Abstract: A turbocharger having a centrifugal compressor includes a vaned diffuser. The vaned diffuser is formed by a diffuser ring formed separately from the compressor housing and center housing. The diffuser ring is installed between the compressor and center housings such that a diffuser passage is defined between a surface of the compressor housing and a surface of the diffuser ring. Integral vanes on the diffuser ring extend only partially across the axial width of the diffuser passage. A rectangular-section seal ring is axially compressed between the compressor housing and the diffuser ring for sealing and axial locating of the diffuser ring. Radial locating of the diffuser ring is accomplished by an integral locating pin on the ring, which fits into a receptacle in the center housing.

Abstract: A turbocharger turbine wheel can include a hub that includes a rotational axis, a backdisk and a nose, where the rotational axis defines an axial coordinate (z) in a cylindrical coordinate system that includes a radial coordinate (r) and an azimuthal coordinate (?) in a direction of intended rotation about the rotational axis; and blades that extend outwardly from the hub, where each of the blades includes a hub profile, a shroud edge, a leading edge, a trailing edge, a pressure side, and a suction side, where the hub profile includes a global maximum radius and a global minimum radius, and where, between the global maximum radius and the global minimum radius, in an axial direction from the backdisk to the nose, the hub profile includes a local minimum radius at a first axial coordinate position and a local maximum radius at a second axial coordinate position.

Abstract: A turbocharger turbine wheel can include a hub that includes a rotational axis, a backdisk and a nose, where the rotational axis defines an axial coordinate (z) in a cylindrical coordinate system that includes a radial coordinate (r) and an azimuthal coordinate (?) in a direction of intended rotation about the rotational axis; and blades that extend outwardly from the hub, where each of the blades includes a leading edge and a trailing edge, where the leading edge includes a lower axial point defined by a first theta angle and an upper axial point defined by a second theta angle, where the first theta angle is greater than the second theta angle with respect to the direction of intended rotation of the turbine wheel.

Abstract: An electric vehicle thermal management system for compressing a low pressure refrigerant with a centrifugal compressor to generate a high pressure refrigerant, determining a battery cooling condition, routing one of the low pressure refrigerant and the high pressure refrigerant to the heat exchanger in response to the battery cooling condition, regulating a transfer of heat between the refrigerant loop and the battery cooling loop in response to a temperature of the battery coolant within the battery cooling loop and the battery cooling condition, and regulating the transfer of heat between the battery coolant loop and a cabin coolant loop in response to the HVAC setting and a cabin coolant temperature within the cabin coolant loop.

Abstract: An e-machine includes a housing with a cooling fluid inlet and a cooling fluid outlet. The e-machine includes a rotating group supported for rotation about an axis of rotation within the housing. The cooling fluid inlet and the cooling fluid outlet are disposed on opposite sides of the axis of rotation. The e-machine includes a stator disposed within the housing. The e-machine includes a plurality of nozzles in fluid communication with the cooling fluid inlet to receive a cooling fluid therefrom. The plurality of nozzles are arranged about the axis of rotation and generally toward the stator. The arrangement of the plurality of nozzles is directed generally in a circumferential direction with respect to the axis of rotation from the cooling fluid inlet to the cooling fluid outlet.

Abstract: An austenitic stainless steel alloy includes, by weight, about 23.0% to about 25.0% chromium, about 8.5% to about 10.0% nickel, about 4.0% to about 5.0% manganese, about 0.8 to about 0.9% niobium, about 0.5% to about 1.5% silicon, about 0.35% to about 0.45% carbon, about 0.2% to about 0.3% nitrogen, and a balance of iron with inevitable/unavoidable impurities. The elements tungsten and molybdenum are excluded beyond impurity levels. In one example, a turbocharger turbine housing is made of the stainless steel alloy.

Abstract: An e-machine includes a housing and a rotating group supported for rotation about an axis of rotation within the housing. The e-machine includes a stator with a plurality of end windings. The e-machine further includes a plurality of nozzles that is removably supported by the housing and spaced apart in a circumferential direction about the axis of rotation. The plurality of nozzles is directed generally radially toward the axis of rotation and toward the plurality of end windings for spraying a cooling fluid on respective ones of the plurality of end windings.

Abstract: An abrasive flow machining process for a meridionally divided turbine housing for a turbocharger employs a fixture installed in the axial bore of the housing to force the abrasive medium to flow substantially 360° about the circumference of the volute, and to shield the portion of the divider of the turbine housing volute located proximate the turbine housing inlet.

Abstract: A turbine housing assembly can include a turbine housing that defines a rotational axis for a turbine wheel; and a cartridge receivable by the turbine housing, where the cartridge includes a nozzle wall component with an upper nozzle surface and a plate component with a lower nozzle surface, where the upper nozzle surface and the lower nozzle surface define a nozzle space, and vanes positioned in the nozzle space, where the vanes are pivotable between a closed vanes position of 0 percent open and a fully open vanes position of 100 percent open, and where, for a vanes position of at least 50 percent open and less than 75 percent open, an axial dimension of the nozzle space increases with respect to decreasing radius as measured from the rotational axis.

Abstract: A compressor for a turbocharger includes an inlet-adjustment mechanism in an air inlet for the compressor, operable to move between an open position and a closed position in the air inlet. The compressor housing upstream of the inlet-adjustment mechanism defines a series of acoustic cavities, and openings are defined in the compressor housing wall leading into the acoustic cavities. The openings and cavities are aimed at mitigating noise and flow pulsation in the air inlet caused when the inlet-adjustment mechanism is adjusted to the closed position to effectively reduce the inlet diameter approaching the compressor wheel.

Abstract: An electrical connector arrangement for a turbomachine includes a support structure and a terminal with a terminal post projecting from the support structure along an axis. The electrical connector arrangement includes a connection stack that is supported by the terminal and arranged along the axis of the terminal post. The connection stack includes a bus bar that is electrically connected to the terminal post and that extends from the terminal post and the support structure. The connection stack includes a first deformable seal member and a second deformable seal member. The first deformable seal member is deformed against the terminal post to define an inner radial seal within the connection stack. The second deformable seal member is deformed against the support structure to define an outer radial seal within the connection stack.

Abstract: A turbomachine includes a rotating group with a turbine wheel. The turbomachine also includes a housing that houses the rotating group, wherein the housing defines a turbine outlet passage for exhaust from the turbine wheel. The turbine outlet passage is directed in a downstream direction along an axis of the turbine outlet passage. The turbomachine includes an air bearing system with at least one bearing component that supports the rotating group for rotation relative to the housing. The air bearing system includes a bearing cooling path that is fluidly connected to the at least one bearing component and that has a bearing air line outlet. The bearing air line outlet is fluidly connected to the turbine outlet passage and is directed in the downstream direction along the axis.

Abstract: Methods and systems for controlling a turbocharger associated with an engine. The turbocharger is operated in a region of operation creating potential surge conditions, but surge is avoided by varying the speed of the turbocharger in accordance with speed parameters determined by observing a resonant frequency of surge in the system.

Abstract: A turbocharger turbine wastegate assembly can include a bushing with a stepped bore that includes an axial face; a wastegate where a shaft includes an end portion, a first axial face, a journal portion, a second axial face and a shoulder portion, where the first axial face is defined at least in part by an end portion diameter and a journal portion diameter, and where the second axial face is defined at least in part by the journal portion diameter and a shoulder portion diameter; a mesh spacer disposed radially about an axial length of the end portion of the shaft; and a shim disposed radially about an axial length of the end portion of the shaft between the axial face of the stepped bore of the bushing and the first axial face of the shaft.