A turbine assembly for an internal combustion engine having: a first turbine that rotates around a first rotation axis and is configured to rotate due to the thrust exerted by exhaust gases emitted by the internal combustion engine; a second turbine which is independent of and separate from the first turbine, rotates around a second rotation axis parallel to and spaced from the first rotation axis, and is configured to rotate due to the thrust exerted by exhaust gases emitted by the internal combustion engine; an electric generator operated by the first turbine; and a transmission device that connects both the turbines to the same electric generator.

This turbocharger includes: an impeller which includes a hub provided to be rotatable around a center axis and a plurality of turbine blades arranged on the outside of the hub in a radial direction at intervals in a circumferential direction around the center axis; and a turbine housing which is disposed on the outside of the impeller in the radial direction and forms a scroll flow path guiding an exhaust gas toward the impeller on the inside of the radial direction while turning the exhaust gas in the circumferential direction, wherein a flow path width in the circumferential direction of at least one of a plurality of inter-blade flow path portions formed between the plurality of turbine blades is different from a flow path width of the another of the plurality of inter-blade flow path portions.

This turbocharger includes: an impeller which includes a hub provided to be rotatable around a center axis and a plurality of turbine blades arranged on the outside of the hub in a radial direction at intervals in a circumferential direction around the center axis; and a turbine housing which is disposed on the outside of the impeller in the radial direction and forms a scroll flow path guiding an exhaust gas toward the impeller on the inside of the radial direction while turning the exhaust gas in the circumferential direction, wherein a flow path width in the circumferential direction of at least one of a plurality of inter-blade flow path portions formed between the plurality of turbine blades is different from a flow path width of the another of the plurality of inter-blade flow path portions.

A generator system may include a compressor and an electric motor. The compressor includes an impeller, and the compressor provides a quantity of air flowing toward an intake of an engine through rotation of the impeller. The electric motor is mechanically linked to the compressor and rotates the impeller to force the quantity of air flowing toward the intake of the engine. The generator system may include a charge air cooler to receive the quantity of air flowing toward the intake of the engine and increase an air charge density of the quantity of air. The generator system may include an exhaust portion to expel exhaust from the engine such that the quantity of air provided by the compressor does not include exhaust expelled by the exhaust portion. The generator system may include an air valve configured to regulate the quantity of air flowing toward the intake of the engine.

A generator system may include a compressor and an electric motor. The compressor includes an impeller, and the compressor provides a quantity of air flowing toward an intake of an engine through rotation of the impeller. The electric motor is mechanically linked to the compressor and rotates the impeller to force the quantity of air flowing toward the intake of the engine. The generator system may include a charge air cooler to receive the quantity of air flowing toward the intake of the engine and increase an air charge density of the quantity of air. The generator system may include an exhaust portion to expel exhaust from the engine such that the quantity of air provided by the compressor does not include exhaust expelled by the exhaust portion. The generator system may include an air valve configured to regulate the quantity of air flowing toward the intake of the engine.

A method for manufacturing a turbine wheel comprising casting the turbine wheel from an austenitic nickel-chromium-based superalloy, subjecting the cast turbine wheel to hot isostatic pressing and then subjecting a surface of the hot isostatically pressed turbine wheel to plastic deformation, wherein said hot isostatic pressing is effected at a pressure of 98 to 200 MPa and a temperature of 1160 to 1220 C. for a time period of 225 to 300 minutes. There is further described a hot isostatically pressed cast turbine wheel manufactured from an austenitic nickel-chromium-based superalloy, the turbine wheel having a plastically deformed surface; and a turbocharger incorporating such a turbine wheel.

A method for manufacturing a turbine wheel comprising casting the turbine wheel from an austenitic nickel-chromium-based superalloy, subjecting the cast turbine wheel to hot isostatic pressing and then subjecting a surface of the hot isostatically pressed turbine wheel to plastic deformation, wherein said hot isostatic pressing is effected at a pressure of 98 to 200 MPa and a temperature of 1160 to 1220 C. for a time period of 225 to 300 minutes. There is further described a hot isostatically pressed cast turbine wheel manufactured from an austenitic nickel-chromium-based superalloy, the turbine wheel having a plastically deformed surface; and a turbocharger incorporating such a turbine wheel.

A supercharging device (20), having: a housing (21) which has a longitudinal axis (L); at least one housing inlet (1) which leads into the housing (21); at least one housing outlet (2) which leads out of the housing (21); at least one compressor wheel (5) which is arranged in a compressor chamber (15) and which is driven by a motor shaft (16) and which is arranged between the housing inlet (1) and the housing outlet (2) of the housing (21) as viewed in the flow direction, and at least one bypass duct (17) which is integrated in the housing (21) and which connects the housing inlet (1) to the housing outlet (2) so as to bypass the compressor chamber (15). The bypass duct (17) has a self-adjusting valve (22). The housing inlet (1) and the housing outlet (2) are formed as an axial inlet and an axial outlet respectively.

A supercharging device (20), having: a housing (21) which has a longitudinal axis (L); at least one housing inlet (1) which leads into the housing (21); at least one housing outlet (2) which leads out of the housing (21); at least one compressor wheel (5) which is arranged in a compressor chamber (15) and which is driven by a motor shaft (16) and which is arranged between the housing inlet (1) and the housing outlet (2) of the housing (21) as viewed in the flow direction, and at least one bypass duct (17) which is integrated in the housing (21) and which connects the housing inlet (1) to the housing outlet (2) so as to bypass the compressor chamber (15). The bypass duct (17) has a self-adjusting valve (22). The housing inlet (1) and the housing outlet (2) are formed as an axial inlet and an axial outlet respectively.

A number of variations may include a product comprising: a turbomachinery device comprising: an electric motor surrounding a portion of a shaft constructed and arranged to selectively drive the shaft in rotation about a rotational axis, wherein the electric motor further comprises a stator comprising a lamination stack; a housing surrounding the electric motor, wherein the housing includes a plurality of channels constructed and arranged to lubricate a first bearing; and wherein the lamination stack includes at least one retention component wherein the retention component is constructed and arranged to locking the stator in an axial direction while locking rotation of the stator about the rotational axis and wherein the retention component further comprises at least one conduit constructed and arranged to pass fluid through the electric motor to a second bearing.