Borgwarner Inc.

Uwe Knauer

Robert Lingenauber

Siegfried Ritter

Thomas Ramb

Leif Heidingsfelder

Urban Radke

A method for manufacturing a turbocharger () with variable turbine geometry (VTG), having a turbine housing () with a feed duct () for exhaust gases; a turbine rotor () which is rotatably mounted in the turbine housing (); and a guide grate () which surrounds the turbine rotor () radially at the outside, which has a blade bearing ring (), which has a multiplicity of guide blades () which have in each case one blade shaft () mounted in the blade bearing ring (), which has an adjusting ring () operatively connected to the guide blades () via associated blade levers () fastened to the blade shafts () at one of the ends thereof, each blade lever () having at the other end a lever head () which can be placed in engagement with an associated engagement recess () of the adjusting ring (), and which has a stop () at least for setting the minimum throughflow through the nozzle cross sections formed by the guide blades (). The stop () is formed as a setting pin which is fastened by means of an automated butt welding process, the position of the setting pin being determined from a previously carried out throughflow measurement with similar guide grates.

Method for manufacturing a turbocharger with variable turbine geometry

A turbocharger with an improved suspension mechanism for the actuation ring of a variable nozzle mechanism, for improved maintenance of the geometry of the suspension mechanism in the case of higher temperature oscillations. The suspension mechanism includes a number of guide rollers () provided between a housing part () and nozzle ring () with circumferential grooves () in which the inner circumference of the actuating ring rides. The rollers are freely rotatable on pins (), and these pins are inserted in bores (or) either in a housing part () or in the nozzle ring (), but not both.

Turbocharger for vehicle with improved suspension of the actuating mechanism for variable nozzles

A turbocharger with an improved suspension mechanism for the actuation ring of a variable nozzle mechanism, for improved maintenance of the geometry of the suspension mechanism in the case of extreme temperature oscillations. The suspension mechanism includes a number of guide rollers () provided between housing part () and nozzle ring () with circumferential grooves () in which the inner circumference of the actuating ring rides. The rollers are formed as one piece together with axial extensions (), which extensions are rotatably seated in appropriate bores in the nozzle ring () and/or in the housing part (). The axial extensions can have diameters which are smaller than or the same as the diameter of the actual roller part.

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Landenburg, Germany

Uwe Knauer