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

Abstract

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.

Inventors:
 [1]
  1. Epinal, FR
Publication Date:
Research Org.:
Honeywell International, Inc. (Morristown, NJ)
Sponsoring Org.:
USDOE
OSTI Identifier:
1014943
Patent Number(s):
7,828,517
Application Number:
US Patent Application 11/834,115
Assignee:
Honeywell International, Inc. (Morristown, NJ)
DOE Contract Number:  
FC26-06NT42873
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Serres, Nicolas. Variable-geometry turbocharger with asymmetric divided volute for engine exhaust gas pulse optimization. United States: N. p., 2010. Web.
Serres, Nicolas. Variable-geometry turbocharger with asymmetric divided volute for engine exhaust gas pulse optimization. United States.
Serres, Nicolas. Tue . "Variable-geometry turbocharger with asymmetric divided volute for engine exhaust gas pulse optimization". United States. https://www.osti.gov/servlets/purl/1014943.
@article{osti_1014943,
title = {Variable-geometry turbocharger with asymmetric divided volute for engine exhaust gas pulse optimization},
author = {Serres, Nicolas},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {11}
}

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