The invention relates to an electric media gap machine (10) for a compressor (2) and/or a turbine (3), in particular for a turbocharger (1) of an internal combustion engine, comprising a shaft (5) which is rotatably mounted in a housing (6) and to which a rotor (11) is rotationally fixed, a stator (12) which is fixed to the housing and which has at least one multiphase drive winding (16) for generating a drive magnetic field and multiple stator teeth (15) which protrude inwards radially. Each stator tooth (15) has a tooth base (29) paired with a stator yoke (12) and a free end (28) facing the rotor (11). The end (28) of at least multiple stator teeth (15), in particular of all of the stator teeth (15), is axially offset to the tooth base (29) of the same stator tooth (15).

A control device for mechanically actuating a component may include a housing surrounding a housing interior, at least one fastening sleeve integrally disposed on the housing, and at least one connection opening disposed at the at least one fastening sleeve. The at least one fastening sleeve may surround a fastening opening into which a pin-shaped fastening element may be insertable. One end of the at least one connection opening may lead to a sleeve inner side. The at least one fastening sleeve may be arranged at a housing outer side. The fastening opening may extend outside of the housing interior. Another end of the at least one connection opening may lead to a housing inner side. The at least one connection opening may be covered on the housing inner side via a membrane penetrable by gas and impenetrable by liquid.

A casing assembly, into which a rotor rotatable around an axis is inserted, includes: a lower half casing including a lower half flange surface and a lower half accommodation recessed portion; an upper half casing including an upper half flange surface and an upper half accommodation recessed portion; a fixing portion that fixes the lower half casing and the upper half casing to each other such that, when the lower and the upper half flange surfaces make contact, the lower half accommodation recessed portion and the upper half accommodation recessed portion form an accommodation space extending about the axis; a housing disposed in the accommodation space; and a seal member disposed on an outer peripheral surface of the housing and in contact with an inner peripheral surface of the lower half accommodation recessed portion and an inner peripheral surface of the upper half accommodation recessed portion.

An exhaust gas turbocharger may include a turbine and a compressor for compression of charge air for an internal combustion engine, and a controllable actuator and a component mechanically adjustable via the actuator. The compressor may include a compressor casing through which charge air is flowable. A holding device may be integrally disposed on the compressor casing. The actuator may be coupled to the holding device, and may be secured to the compressor casing via the holding device. The holding device may have at least one integrally formed protective contour that may extend around the actuator in certain regions at a separation distance from the actuator, and may enclose the actuator in certain regions, such that the actuator is shielded in certain regions from external influences via the at least one protective contour.

A compound engine assembly with an inlet duct, a compressor, an engine core including at least one internal combustion engine, and a turbine section including a turbine shaft configured to compound power with the engine shaft. The turbine section may include a first stage turbine and a second stage turbine. The turbine shaft and the engine shaft are parallel to each other. The turbine shaft, the engine shaft and at least part of the inlet duct are all radially offset from one another. A method of driving a rotatable load of an aircraft is also discussed.

In a vehicle, a rod of a waste gate valve actuator reciprocates along a virtual plane which is parallel to both the central axis of a connecting shaft of a turbocharger and the cylinder axis of a cylinder hole. When viewed in the left or right direction of the vehicle, a main catalyst of a catalyst portion is provided forward of the cylinder axis of the cylinder hole. The flow direction of the exhaust gas in the main catalyst intersects with the reciprocating direction of the rod of the waste gate valve actuator when viewed in a direction orthogonal to both the central axis of the connecting shaft of the turbocharger and the central axis of the cylinder hole.

A method of loading a rotating assembly of a turbocharger includes positioning a lock collar on an end portion of a turbocharger shaft that extends through a through bore of a compressor wheel; applying a pulling force to the end portion of the turbocharger shaft to achieve a desired amount of loading; welding the lock collar to form a welded lock collar fixed to the end portion of the turbocharger shaft; and releasing the pulling force where the welded lock collar maintains the desired amount of loading.

A compressor for compressing a gas, the compressor comprising: a housing having an axial inlet and an annular outlet volute; an impeller wheel including a plurality of blades, the wheel being rotatably mounted within the housing between the inlet and outlet volute; the axial inlet being defined by a tubular inducer portion of the housing and the annular outlet volute being defined by an annular diffuser passage surrounding the impeller, the diffuser having an annular outlet communicating with the outlet volute; the housing having an inner wall defining a surface located in close proximity to radially outer edges of the impeller blades which sweep across the surface as the impeller wheel rotates; wherein the compressor housing incorporates at least one section comprised of a deformable, energy absorbing material arranged to deform and absorb energy generated as a result of impeller wheel failure. A turbine incorporating similar deformable, energy absorbing materials is also described, as are turbochargers incorporating such a compressor and/or turbine.

A turbocharger includes a turbine housing formed with openings of twin scrolls such that the openings are arranged to be adjacent to each other in an axial direction of a turbine. A fixed sleeve is fixedly disposed within the turbine housing such that an inner surface of the fixed sleeve defines a basic passage as a passage for exhaust gas emerging from the turbine while defining a bypass passage outside the basic passage as a passage for exhaust gas bypassing the turbine. A sliding ring can slide in the axial direction of the turbine between the fixed sleeve and the turbine housing, to control a state in which exhaust gas passing through the twin scrolls is supplied to the turbine and a state in which the exhaust gas passing through the twin scrolls is discharged into the bypass passage while bypassing the turbine.

A method of detecting surging in a turbocharger provided for an internal combustion engine, includes: a first characteristic quantity calculation step of calculating a first characteristic quantity in at least one first frequency region corresponding to at least one first peak frequency component unique to the time of occurrence of surging in the turbocharger on the basis of a time-variable waveform indicating a time-series change of a rotation speed of the turbocharger; a second characteristic quantity calculation step of calculating a second characteristic quantity in a second frequency region including the at least one first frequency region on the basis of the time-variable waveform; and a detection step of detecting surging in the turbocharger on the basis of a relationship between the first characteristic quantity and the second characteristic quantity. The second frequency region further includes at least one second peak frequency unique to the time of acceleration and deceleration of the internal combustion engine from among frequency components different from the at least one first peak frequency component.