Skip to Content
Find More Like This
Return to Search

Variable-geometry turbocharger with asymmetric divided volute for engine exhaust gas pulse optimization

United States Patent

November 9, 2010
View the Complete Patent at the US Patent & Trademark Office
A turbine assembly for a variable-geometry turbocharger includes a turbine housing defining a divided volute having first and second scrolls, wherein the first scroll has a substantially smaller volume than the second scroll. The first scroll feeds exhaust gas to a first portion of a turbine wheel upstream of the throat of the wheel, while the second scroll feeds gas to a second portion of the wheel at least part of which is downstream of the throat. Flow from the second scroll is regulated by a sliding piston. The first scroll can be optimized for low-flow conditions such that the turbocharger can operate effectively like a small fixed-geometry turbocharger when the piston is closed. The turbine housing defines an inlet that is divided by a dividing wall into two portions respectively feeding gas to the two scrolls, a leading edge of the dividing wall being downstream of the inlet mouth.
Serres; Nicolas (Epinal, FR)
Honeywell International, Inc. (Morristown, NJ)
11/ 834,115
August 6, 2007
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.