Borgwarner Inc.

Eli Morgan

Donald Michael Kennedy

Matthew King

Ryan Howell

Greg Williams

John R Zagone

Josh Norsworthy

Shannon Scott

A variable turbine geometry assembly is provided for controlling flow of exhaust gas to a turbine wheel of a turbocharger. The variable turbine geometry assembly includes a base structure, vanes, vane levers, and an adjustment ring. The vanes are distributed circumferentially around the base structure and are pivotable relative to the base structure to vary an effective inlet area. The vane levers are for pivoting the vanes. The vane levers each include an inner portion coupled to one of the vanes and an outer portion extending from the inner portion. The adjustment ring is selectively rotatable about a central axis to pivot the vanes. The adjustment ring includes apertures that are each associated with and have received therein the outer portion of one of the vane levers. The outer portion of each of the vane levers includes an outer surface that is non-parallel with the central axis.

Variable turbine geometry vane lever

A pivot shaft assembly for a turbocharger with variable turbine geometry (VTG) is provided. The pivot shaft assembly may include a pivot shaft, a pivot fork extending from the pivot shaft, a VTG lever disposed on the pivot shaft, and a retention collar axially coupled to the pivot shaft such that the VTG lever is axially aligned with the retention collar and the pivot shaft.

Stamped variable geometry turbocharger lever using retention collar

A vane pack assembly () for a variable geometry turbocharger () including a an upper vane ring () and a lower vane ring () and a plurality of single-axle, self-centering adjustable guide vanes () disposed in a turbine housing (). The plurality of guide vanes () include a post () having a vane () formed integrally therewith. Each post () includes a convex self-centering pivot feature () at one end adapted to seat in a complementary shaped concave self-centering pivot recess () of the lower vane ring. The vanes () are positioned between the upper and lower vane rings () and pivot to control exhaust flow to a turbine wheel. The self-centering pivot features compensate for movement or deformation of the turbine housing () and vane rings () due to the effects of differential thermal expansion.

Variable turbine geometry vane with single-axle, self-centering pivot feature

A number of variations may include a product comprising: a vane lever comprising a first end; a second end; a top surface; and a bottom surface; and an opening defined by an inner surface which extends through the top surface and the bottom surface of the second end, and wherein at least a portion of the inner surface comprises a non-cylindrical, multi-lobed shape.

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Leicester, NC, United States of America

Eli Morgan