Abstract: In a connecting element for a control device of an exhaust turbocharger which connecting element comprises a first element portion having a first passage opening a second element portion having a second passage opening, the first passage opening serves to connect the connecting element to the control device and the second passage opening serves to connect the connecting element to a movement device.

Abstract: The invention relates to an exhaust gas guide section for an exhaust gas turbocharger, with a first spiral channel (4) and a second spiral channel (5) for the inflow of a turbine wheel which is rotatably accommodated in the through-flow exhaust gas guide section, wherein a through-flow opening (10) is provided between the first spiral channel (4) and the second spiral channel (5), which is formed for inducing an overflow of exhaust gas from the first spiral channel (4) into the second spiral channel (5) and vice versa, and wherein the through-flow opening (10) comprises a movable covering element (9?) for opening or closing of the through-flow opening (10). According to the invention, the covering element (9?) is configured to degressively open a first flow cross section (11) of the through-flow opening (10).

Abstract: In an impeller for a fluid energy machine with a hub and a plurality of rotor blades which are mounted on the hub and around which a medium may flow through the fluid energy machine and which form a blade duct between two neighboring rotor blades with a blade duct length which extends in the axial direction of the impeller, wherein each rotor blade is connected to the hub via a first transition region with a first curvature and via a second transition region with a second curvature and with a straight conical blade duct bottom of the blade duct formed between the first transition region and the second transition region.

Abstract: In an adjusting device for an exhaust gas turbocharger with a first adjusting member and a second adjusting member for operating a valve element for varying the flow cross-section of a bypass duct of a flow-through exhaust gas guide portion of a turbine of an exhaust gas turbocharger, the first adjusting member and the second adjusting member are connected so as to be pivotable relative to one another by a pin-shaped connecting element with a locking element establishing a pivot joint of the first adjusting member and the second adjusting member with a predetermined axial engagement force.

Abstract: In an adjustable guide vane mechanism for a turbine, comprising a bearing ring with a plurality of guide vanes rotatably supported on the bearing ring by means of guide vane shafts provided with actuating levers which are engaged by a rotatable ring, the rotatable ring comprises axially spaced radial inner and outer sections with a radially inclined center section joining the spaced radial inner and outer sections, the radially inner section being rotatably supported and the radially outer section extending around the actuating levers and having recesses in which the actuating levers are received for pivoting the actuating levers and the guide vanes upon rotation of the rotatable ring.

Abstract: In a fluid energy machine, such as an exhaust gas turbocharger of an internal combustion engine of an automobile, with a casing accommodating a rotor wheel that is rotatable about a first axis of rotation extending in the axial direction of the casing, an inlet flow passage which extends generally in a flow direction at an angle relative to the axial and the radial directions to the housing, the flow passage is formed by spaced insertion elements with spherical sections that have a common center of curvature disposed on the first axis of rotation and guide vanes are supported between the spaced spherical wall sections of the insertion elements so as to be rotatable about a second axis of rotation which extends through the common center of curvature, and have opposite axial end walls also curved spherically with a center of curvature coinciding with the center of curvature of the insertion elements thereby to be pivotable between the two spaced spherical wall sections of the insertion elements with minimal cle

Abstract: In a compressor, comprising a housing including a flow-through air guiding section with an inlet duct, a wheel chamber formed downstream of the inlet duct for accommodating a compressor wheel, and a spiral duct formed downstream of the wheel chamber, wherein flow slots are formed in a transition region connecting the inlet duct with the wheel chamber, and the transition region extends both in the directions of the inlet duct and of the wheel chamber along a leading edge of the compressor wheel, the flow slots each extend along an axial first length (L1) and along a radial length (RL) with a cross-section (Q), which cross-section (Q) changes over the axial first length (L1) of the flow slots.

Abstract: In a heat shield for an exhaust gas turbocharger, by means of which at least a first area of the exhaust gas turbocharger is to be shielded against a second area in a heat insulating manner wherein the heat shield comprises at least one fastening structure by which the heat shield is attached to one of the housing parts of the exhaust gas turbocharger, the fastening structure is in the form of locking elements for interlocking the heat shield with the respective housing part. The invention also resides in an arrangement of a heat shield between two housing parts of an exhaust gas turbocharger in such a way that it is firmly attached to one housing part without contacting the other housing part.

Abstract: In a turbine for an exhaust gas turbocharger with a turbine casing having a receiving chamber for accommodating a turbine wheel and at least one volute through which the exhaust gas is guided via a feed passage into the receiving chamber and wherein at least one guide element is provided in the turbine casing so as to project into the feed passage in a guide region for guiding the exhaust gas onto the turbine wheel, the guide element comprises a first length region in the axial direction of the turbine, in which the guide element is designed with respect to its aerodynamic properties differently from its aerodynamic design in a second length region adjoining the first length region.

Abstract: In a turbine for an exhaust gas turbocharger with a turbine casing comprising a housing space for the turbine wheel of a turbine with guide vanes arranged upstream of the turbine wheel in a radial direction of the turbine wheel so as to be stationary relative to the turbine casing for guiding exhaust gas to the turbine wheel, and with an actuating element by which an inlet flow cross-section of the turbine through which the exhaust gas flows is variably adjustable and which is movable in the axial direction of the turbine between a blocking position restricting the flow cross-section and an open position clearing the flow cross-section relative to the turbine casing, the actuating elements extend through conforming openings formed in the guide walls between the guide vanes into the spaces defined between the guide vanes for controlling the turbine inlet flow cross-section.

Abstract: A method for mounting and setting an actuator of an exhaust gas turbocharger and a suitable electric actuating device are provided. The actuating device has an axially movable actuating rod which is connected to a coupling element which for its part is connected via a pivot pin to an actuation section of a bypass valve, the actuation section being configured as a lever arm. In order to set the desired closed position of the bypass valve during a predefined actuation of the actuating device, the coupling element is first connected to the actuating rod while still being displaceable. Before the fixing, the position of the actuating device which corresponds to the closed position is set by application of the corresponding voltage to the electric actuating device. Subsequently, a prestressing force is applied to the coupling element coaxially with respect to the actuating rod via a pneumatic actuator.

Abstract: A base portion of the support ring includes as many joining areas as connection pins. The joining areas respectively surround pin holes through which to insert end portions of the connection pins, and are arranged in a circumferential direction of the support ring. Cuts are formed around each joining area of the support ring in order to allow deformation of an intermediate portion of the support ring relative to the joining area.

Abstract: The invention resides in a bearing device for an exhaust gas turbocharger, comprising a first radial bearing and a second radial bearing configured for the radial support of a shaft of the exhaust gas turbocharger, wherein the first radial bearing comprises a bearing axis extending in alignment with the bearing axis of the second radial bearing which is arranged spaced from the first radial bearing, a third radial bearing with a third bearing axis which is extends parallel to, but at a distance (E) from, the first bearing axis and the second bearing axis is arranged between the first and second radial bearings. The invention resides also in a turbocharger including such a bearing device.

Abstract: In an actuating device for a turbine of an exhaust gas turbocharger for controlling the charging pressure of the exhaust gas turbocharger, wherein a valve of the exhaust gas turbocharger has an actuating shaft onto which a connecting arm is firmly mounted and is pivotally coupled to an actuating link via a connecting bolt by which the actuating shaft can be pivoted about an axis of rotation by a translatory motion of the actuating link, the actuating shaft and the connecting bolt are engaged via a single integral locking element for retaining the actuating link in engagement with the connecting bolt and the actuating shaft.

Abstract: In a control device for a flow-through exhaust gas guide section of a turbine for opening and dosing a bypass duct to permit exhaust gas to bypass a turbine wheel arranged in a turbine wheel housing of the exhaust gas guide section comprising with an actuating device and a cover element being provided for opening or dosing a flow cross-section of the bypass duct, the cover element is a hollow truncated cone with passages provided in the cone-shaped cover element which differ from one another so as to provide for a controllable efficient and quiet exhaust gas flow through the flow cross-section into the bypass duct.

Abstract: In an exhaust gas charger bleed valve with a valve disk by which the flow cross-section of a bypass duct, via which exhaust gas flow volume bypassing an impeller of the exhaust gas turbocharger is adjustable, the valve includes a valve disk with the exhaust gas turbocharger is adjustable, the valve includes a valve disk with a front end valve face which is formed so as to be asymmetric with respect to the valve disk attachment to a lever arm on which the valve disk is mounted.

Abstract: In an actuating structure for a valve, in particular for a waste gate of an exhaust gas turbocharger, comprising a lever element and a valve closure element which is movably supported by the lever element and has a sealing surface for sealing a valve opening wherein the lever element and the valve element cooperate via respective contact areas, which are curved at least with respect to a plane perpendicular to the axial direction of the valve, the curved contact areas are arranged concentrically with each other and have a common center of curvature which is arranged at least essentially at the level of the sealing surface of the valve closure element.

Abstract: In an exhaust gas turbine with a guide section for the exhaust gas turbine comprising a flow-through duct for conducting exhaust gas through the exhaust gas guide section, wherein the flow-through duct includes a wheel chamber in which a turbine wheel is rotatably supported and wherein, downstream of the wheel chamber, the flow-through duct has an outlet portion and upstream of the wheel chamber, the flow-through duct has an inlet portion with a bypass duct being formed in the exhaust gas guide section for by-passing the wheel chamber, the by-pass duct forms an annular opening adjacent the turbine wheel for directing by-pass exhaust gas into the exhaust gas outlet portion in an annular flow pattern along the outlet portion duct wall.

Abstract: In a sealing arrangement for an control device of a charging device which sealing arrangement includes a bearing bushing in which an control shaft is rotatably supported by the bushing in a housing opening of the charging device, the control shaft is provided with a collar disposed in the housing opening at an axial end of the bushing and the collar includes a groove accommodating a seal ring which is in direct contact with the wall of the opening for sealing the shaft supported in the bushing directly with respect to the opening wall.

Abstract: In an adjusting device for a charger device, in particular an exhaust gas turbocharger, with a holding ring on which a plurality of guide vanes is mounted in an operative connection with an actuating ring via a respective connecting element and whose respective angle of attack is adjustable by rotation of the actuating ring, the respective connecting elements are in an operative connection with the actuating element via at least one effective area which extends slant to the axial direction of the adjusting device so as to bias the connecting elements and the guide vanes associated therewith in a predetermined axial direction.