A method is provided for preventing oil escape into an exhaust gas during operation of a turbocharged engine. The method includes providing pressurized fluid to an area sealing off a bearing housing of an axial turbine unit from an adjacent exhaust conduit downstream of the axial turbine unit, and detecting a malfunction in the provision of pressurized fluid. Further to this, the method includes the step of, in response to such malfunction detection, controlling an exhaust pressure increasing device arranged downstream of the axial turbine unit for increasing the pressure inside the exhaust conduit upstream of the exhaust pressure increasing device.

A dual compressor turbocharger includes two compressors. One compressor supplies fuel pressure, and one compressor supplies air pressure. The dual compressor turbocharger includes a turbine driven by exhaust of an engine and a shaft coupled to the turbine. The first compressor is mounted on the shaft and includes a first inlet coupled to an air supply and a first outlet coupled to an air intake of the engine. The second compressor is mounted on the shaft and includes a second inlet coupled to a fuel supply and a second outlet coupled to a fuel supply rail of the engine.

Disclosed is a blowby gas treatment device for an internal combustion engine with a supercharger, the blowby gas treatment device comprising: a fresh air introduction passage wherein one end of the fresh air introduction passage is connected to an upstream side of the supercharger and the other end is communicated with a crankcase of the internal combustion engine; a first blowby gas passage wherein one end of the first blowby gas passage is connected to a venturi part provided in an upstream side of the supercharger in the intake passage and the other end is communicated with the crankcase; a first check valve being interposed in the fresh air introduction passage and preventing a flow from the crankcase side to the intake passage side; and a second check valve being interposed in the blowby gas passage and preventing a flow from the intake passage side to the crankcase side.

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.

An aircraft engine, comprising a thermal engine, an axial turbine having a turbine inlet, and an exhaust assembly fluidly connecting the thermal engine to the axial turbine. The exhaust assembly includes a housing and a deflector removably mounted within the housing. The deflector has circumferentially distributed vanes. The deflector is a first deflector, having a first set of geometric characteristics, that is removable from the housing and replaceable by a second deflector having a second set of geometric characteristics different from the first set of geometric characteristics. The first deflector is one of a first class of deflectors and the second deflector is one of a second class of deflectors, the first and second class of deflectors respectively defining first and second exhaust flow profiles that differ from each other.

A turbocharger includes a turbine wheel configured to impart torque to a drive shaft, a compressor wheel configured to be driven by a driven shaft, a one-way clutch operatively connecting the drive shaft and the driven shaft such that the drive shaft can impart torque to the driven shaft and the driven shaft can overrun the drive shaft, and a motor-generator capable of imparting torque to the driven shaft or the compressor wheel, and/or generating an electric current. The motor-generator generates electric current via torque provided from the drive shaft. An energy storage device can be selectively regenerated by electric current generated by the motor-generator. The motor-generator is configured to alternately regenerate the energy storage device and drive the driven shaft at overrun speeds relative to the drive shaft. The turbine wheel can be driven by internal combustion engine (ICE) exhaust. An ICE may utilize a plurality of such turbochargers.

A number of variations may include a combustion engine tailpipe exhaust circuit defining an exhaust stream and a waste heat recovery system constructed and arranged to recover thermal energy from at least one of a tailpipe exhaust circuit, exhaust stream, charge air cooler, exhaust gas recirculation fluid stream, or coolant stream. The waste heat recovery system may include an expander assembly that may include a first pump, an expander, an evaporator, and a condenser. A second pump driven by the waste heat recovery system may be in fluid communication with the tailpipe exhaust circuit and exhaust stream and may be constructed and arranged to reduce exhaust pressure in the tailpipe exhaust circuit and exhaust stream. A third pump may be in fluid communication with an exhaust gas recirculation fluid stream and which is constructed and arranged to pump the exhaust gas recirculation fluid stream within the exhaust gas recirculation system.

A turbocharger system and hybrid turbocharger, and a method of operating the same, are provided for a vehicle having an engine with an air intake and an exhaust. The hybrid turbocharger includes: a turbine having a turbine shaft, the turbine configured to receive gases from the exhaust and drive rotation of the turbine shaft; a compressor having a compressor shaft, the compressor configured to receive ambient air and supply compressed air to the air intake of the engine; a clutch connected to the turbine shaft and compressor shaft, the clutch configured to selectively engage the compressor shaft to the turbine shaft for rotation together; and a motor generator unit operably coupled to the compressor shaft. The system and hybrid turbocharger may also include a power controller operatively connected to the motor generator unit, and an electrical storage system operatively connected to the power controller.

A product may include a bearing housing in which a shaft may be supported by a bearing so that it may rotate. A compressor wheel may be disposed on the shaft. A compressor cover may be connected with the bearing housing, which may form a compressor body and may define a chamber within which the compressor wheel may rotate. A diffuser may extend radially outward from the chamber and may receive gas from the compressor wheel. An inlet may be provided to the compressor body, which may receive a supply of exhaust gas. An EGR distribution cavity may be defined within the compressor body and may extend around the shaft. An EGR inlet channel may extend into the bearing housing from the inlet to the EGR distribution cavity. An EGR passage may extend from the EGR distribution cavity to the diffuser.

An apparatus for improving efficiency of a turbocharger engine including a turbocharger configured of a turbine rotated by discharge force of exhaust gas transferred from an exhaust manifold, and a compressor rotated coaxially with the turbine to compress intake air applied to an engine is provided. The turbine includes a turbine housing and a turbine wheel. The apparatus includes an auxiliary wheel that is formed at one side of the turbine wheel and an air compressor rotated by being connected to a crankshaft of the engine to generate compressed air. A valve connects between the air compressor and an air tank to transfer the compressed air to the air tank, and transfers, when charging of the air tank is completed, the compressed air to the auxiliary wheel side to increase torque of the turbine wheel.