Patent ID: 8033109
Filing Date: 2011-10-11
Classification: F01D,F02C,F05D

Abstract:
1. A turbocharger having a variable-nozzle turbine, comprising: a turbine assembly comprising a turbine housing and a turbine wheel mounted in the turbine housing and connected to a rotatable shaft for rotation therewith, the turbine housing defining a chamber surrounding the turbine wheel for receiving exhaust gas from an engine and for supplying the exhaust gas to the turbine wheel, the turbine assembly defining a nozzle leading from the chamber generally radially inwardly to the turbine wheel; a compressor assembly comprising a compressor housing and a compressor wheel mounted in the compressor housing and connected to the rotatable shaft for rotation therewith; a center housing connected between the compressor housing and the turbine housing; a generally annular nozzle ring and an array of vanes circumferentially spaced about the nozzle ring and disposed in the nozzle such that exhaust gas flows between the vanes to the turbine wheel, the vanes being rotatably mounted to the nozzle ring such that the vanes are rotatably adjustable for regulating exhaust gas flow to the turbine wheel, wherein the center housing includes an axially extending annular flange that passes radially outwardly of a radially outer surface of the nozzle ring, the flange defining a radially inner surface; and a seal member disposed between and contacting the radially outer surface of the nozzle ring and the radially inner surface of the flange so as to radially center the nozzle ring relative to the center housing.