A radial compressor comprising an iris diaphragm mechanism for a charging device of an internal combustion engine. The charging device comprises a radial compressor and a lamella for the iris diaphragm mechanism. The radial compressor has an impeller which is rotationally fixed to a rotatably mounted rotor shaft; and a fresh air supply channel for conducting a fresh air mass flow to the impeller. An iris diaphragm mechanism is arranged upstream of the impeller such that a flow cross-section for the fresh air mass flow for admission to the impeller can be variably adjusted at least over a sub-region. The iris diaphragm mechanism comprises several lamellae, wherein each lamella has a lamella base body with an inner edge portion for delimiting the diaphragm aperture, and the inner edge portion of each lamella has an inner edge, which is blunt-edged, on a side facing away from the impeller.

A radial compressor has an iris diaphragm mechanism for a pressure-charging device of an internal combustion engine. The radial compressor has a bearing assembly, in which a rotor shaft is rotatably mounted, having a compressor impeller arranged in a compressor housing for conjoint rotation on the rotor shaft and having a fresh air supply channel for carrying a fresh air mass flow to the compressor impeller. The iris diaphragm mechanism is upstream of the compressor impeller, allowing variable adjustment of a flow cross section for the fresh air mass flow for admission to the compressor impeller, at least over a partial region. The iris diaphragm mechanism has a plurality of blades, each having at least one first and one second blade section, wherein an offset is formed between the first blade section and the second blade section of the respective blade.

A compressor is disclosed for a charging device of an internal combustion engine. An iris diaphragm mechanism is arranged upstream of the compressor wheel. An actuator is mechanically coupled to an adjusting ring of the iris diaphragm mechanism for transmitting torque of an actuator shaft to the adjusting ring for rotating the adjusting ring. A pivotable coupling pin is arranged eccentrically on the actuator shaft and has a bearing bush which is displaceable along a longitudinal axis of the coupling pin. The bearing bush is mounted between two fingers of an adjusting lever of the adjusting ring so as to be displaceable along the fingers. An outer contact surface of the bearing bush is spherical. Inner contact surfaces of the two fingers are cylindrical to correspond to the spherical outer contact surface of the bearing bush and are in sliding contact with the outer contact surface of the bearing bush.

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. The inlet-adjustment mechanism includes a plurality of blades disposed about the air inlet, the blades being movable radially inwardly from an annular space of the air inlet wall, into the air inlet, so as to form an orifice of reduced diameter relative to a nominal diameter of the inlet. A noise-attenuator is disposed in the annular space, downstream of the inlet-adjustment mechanism, for attenuating aerodynamic noise induced by the inlet-adjustment mechanism when it is closed.

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. The inlet-adjustment mechanism includes a plurality of blades disposed about the air inlet, the blades being movable radially inwardly from an annular space of the air inlet wall, into the air inlet, so as to form an orifice of reduced diameter relative to a nominal diameter of the inlet. A noise-attenuator is disposed in the annular space, downstream of the inlet-adjustment mechanism, for attenuating aerodynamic noise induced by the inlet-adjustment mechanism when it is closed.

A bypass turbine engine is described. The engine includes a system for bleeding gas from a primary stream to a secondary stream. The system may include two coaxial rings extending one around the other. A perforated internal first ring may be situated at the level of an outer casing and may extend substantially in a continuation of the outer casing. A perforated external second ring may be mounted such that it slides circumferentially on the first ring between a first position in which the perforations of the rings do not communicate with one another and a second bleed position in which the perforations of the rings communicate with one another.

A steam valve includes: a valve casing; a first valve body; a second valve body; a second valve rod; a first valve rod; a first actuator capable of applying a first biasing force in the vertical direction to the first valve rod; a second actuator capable of applying a second biasing force in the vertical direction to the second valve rod; a first link mechanism disposed between the first actuator and the first valve rod and capable of transmitting the first biasing force; a second link mechanism disposed between the second actuator and the second valve rod and capable of transmitting the second biasing force, the second link mechanism having a linking part provided integrally with the second valve rod and a lever which is pin-coupled to the linking part; and a guide mechanism capable of regulating horizontal displacement of the linking part.

A bleed valve assembly of a gas turbine engine includes two or more valve segments extending circumferentially around a central longitudinal axis of the gas turbine engine, and a first splice bracket spanning a first joint between a first valve segment and a second valve segment of the two or more valve segments. The first splice is bracket secured to the first valve segment and the second valve segment. A second splice bracket spans a second joint between the first valve segment and the second valve segment. The second splice bracket is secured to the first valve segment and the second valve segment.

An assembly can include a turbine housing that includes a bore, a wastegate seat and a wastegate passage that extends to the wastegate seat; a bushing disposed at least in part in the bore; a rotatable wastegate shaft received at least in part by the bushing; a wastegate plug that extends from the wastegate shaft; a control arm operatively coupled to the wastegate shaft; a control link operatively coupled to the control arm; a pin that forms a joint between the control arm and the control link; and a biasing element coupled to the pin and to the control link.

The present invention is related to the housing (60) of an exhaust turbine (32) of a turbocharger comprising a first volute (61) and a second volute (62), each of the volutes (61,62) ending in respective first and second guide tongues (64,66). The gap between the first guide tongue (64) and turbine wheel is smaller than the gap between the second guide tongue (66) and turbine wheel. This tongue asymmetry allows for control of the pulse amplitude emitted when a blade of the turbine wheel passes by each respective tongue. Moreover, by increasing the wheel-to-tongue distance of only the second guide tongue (66) durability requirements can be met.