The invention relates to a flap arrangement for a turbine of a turbocharger, in particular for a wastegate valve of the turbine, having a spindle for mounting the flap arrangement in a rotatable manner in a turbine housing, having a lever arm, wherein the lever arm is coupled to the spindle, and having a flap disk, wherein the flap disk is coupled to the lever arm. At least part of the lever arm is configured elastically such that applying a closing force to the flap arrangement, when the flap disk is in contact with a flap seat in the turbine housing, provides for relative movement of the flap disk in relation to the spindle, in order to compensate for thermal deformation of the turbine housing and/or wear.

A driving device includes: a shaft; and a cylindrical bush having an insertion hole into which the shaft can be inserted. The insertion hole includes an opening portion having an inner diameter decreasing from a first end surface toward a second end surface of the bush, and a small-diameter hole portion extending from an end of the opening portion to the second end surface. The shaft includes a shaft portion having an outer diameter smaller than an inner diameter of the small-diameter hole portion, and an abutment portion having an outer diameter greater than the inner diameter of the small-diameter hole portion. The bush has a sealing surface defining the opening portion. The abutment portion of the shaft abuts on the sealing surface of the bush in an axial direction of the insertion hole to seal a gap formed between the shaft and the bush inside the insertion hole.

An exhaust gas turbocharger assembly includes a turbocharger, an actuator, and a bolted connection for releasably securing the actuator housing on a housing flange of the turbocharger housing. The bolted connection includes a through opening, an aperture bounded at the circumference by an internal thread made of a metal, and a fit bolt with a bolt body which merges axially into a bolt head. The bolt body has a first axial body section with an external thread formed in a manner complementary to the internal thread of the aperture, and a second axial body section arranged axially between the bolt head and the first body section. The fit bolt engages through the through opening of the actuator housing in the internal thread of the aperture with the external thread to clamp the actuator housing between the housing flange of the turbocharger housing and the bolt head of the fit bolt.

A turbocharger for a combustion engine has an adjusting device for matching its operating behavior to the operating behavior of the combustion engine, an actuating actuator, and a transmission element. The transmission element is coupled between the actuating actuator and the adjusting device. The transmission element has a one-part component body, which in each case extends from a first coupling point to a second coupling point along a longitudinal axis and, in each of its end regions, has a coupling element for coupling to the actuating actuator and to the adjusting device. The respective coupling element is designed as an integral part of the component body in the form of a ball receptacle of a ball joint connection in the component body.

A set for turbochargers of internal combustion engines, equipped with mechanical actuators and wastegate flip valve. The set includes in its interior a valve, a valve's arm, a valve's shaft and a bushing, all of which are housed inside a metal casing. The set allows the replacement of the valve and its accessory components way before the end of the turbocharger's life span. Also, a turbocharger adapted for the set, which is provided with an accommodation zone including a bore and a series of fixing gantries cooperating with elements in the face of the set.

An internal combustion engine has first and second combustion chambers, first and second exhaust gas line elements, and an exhaust gas turbocharger which has a first flood, a second flood, and a third flood. A bypass device has a bypass line that can be flowed through by exhaust gas from the first and second exhaust gas line elements and via the bypass line a turbine wheel is bypassed by a first part of the exhaust gas from the first and second exhaust gas line elements. A valve device includes a first valve element, via which an amount of the exhaust gas flowing through the bypass line and bypassing the turbine wheel from the first and second exhaust gas line elements is settable. A third exhaust gas line element opens out into the third flood.

A method for controlling and/or regulating an exhaust gas turbocharger of an internal combustion engine, the exhaust gas turbocharger being protected against an exceeding of a maximum rotational speed, an actual boost pressure being compared with a setpoint boost pressure. The risk of a maximum rotational speed of the exhaust gas turbocharger being exceeded is prevented in that a manipulated variable assigned to the exhaust gas turbocharger is compared with a manipulated variable limit characteristic and is limited, if necessary, the manipulated variable limit characteristic having a time-limited, first portion and a chronologically subsequent, second portion following a change in the setpoint boost pressure, the first portion ending after a predetermined target time, the second portion of the manipulated variable limit characteristic being reduced with respect to the first portion in such a way that the maximum rotational speed of the exhaust gas turbocharger is not reached.

A wastegate assembly for controlling flow of exhaust gas includes a valve element having a valve body and a valve shaft. The wastegate assembly further includes a spindle having a head defining an opening for receiving the valve shaft. The wastegate assembly further includes a washer coupled to the valve shaft and spaced from the spindle such that the spindle is disposed between the valve body and the washer. The spindle head or the washer includes a raised lip extending towards the other of the spindle head or the washer, with the other of the spindle head or the washer defining a notch configured to at least partially receive the raised lip and configured to cooperate with the raised lip to shield the biasing member from exhaust gas and high temperatures.

There is provided a seal assembly comprising: a first component and a second component spaced apart from the first component so as to define a passage for the transfer of fluid from an inlet of the seal assembly to an outlet of the seal assembly, wherein the first component comprises a concavity at least partially defining the passage, and wherein no part of the second component extends into the portion of the passage bounded by the concavity.

A valve flap device for opening and closing a bypass valve of a turbocharger is provided. The valve flap device includes a valve spindle, a flap support arranged on the valve spindle and having a through aperture, a cover disk in the form of a circular ring, and a valve flap arranged on a support lower side of the flap support on the support lower side. The valve flap includes a flap plate and a flap support pin arranged on the flap plate rear side and is passed through the through aperture of the flap support and is firmly connected to the cover disk. A spring element is installed in the spring gap under a preload. A centering device, provided on the support upper side, is arranged concentrically with the central axis of the through aperture and keeps the spring element in a centered position relative to the central axis.