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Turbocharger with variable nozzle having vane sealing surfaces

United States Patent

November 15, 2011
View the Complete Patent at the US Patent & Trademark Office
A variable nozzle for a turbocharger includes a plurality of vanes rotatably mounted on a nozzle ring and disposed in a nozzle flow path defined between the nozzle ring and an opposite nozzle wall. Either or both of the faces of the nozzle ring and nozzle wall include(s) at least one step that defines sealing surfaces positioned to be substantially abutted by airfoil surfaces of the vanes in the closed position of the vanes and to be spaced from the airfoil surfaces in positions other than the closed position. This substantial abutment between the airfoil surfaces and the sealing surfaces serves to substantially prevent exhaust gas from leaking past the ends of the airfoil portions. At the same time, clearances between the nozzle ring face and the end faces of the airfoil portions can be sufficiently large to prevent binding of the vanes under all operating conditions.
Arnold; Philippe (Hennecourt, FR), Petitjean; Dominique (Julienrupt, FR), Ruquart; Anthony (Thaon les Vosges, FR), Dupont; Guillaume (Thaon les Vosges, FR), Jeckel; Denis (Thaon les Vosges, FR)
Honeywell International Inc. (Morristown, NJ)
12/ 115,245
May 5, 2008
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with United States Government support under DOE Contract No. DE-FC26-06NT42873 awarded by U.S. Department of Energy. The United States Government has certain rights in the invention.