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Title: Low pressure EGR system having full range capability

Abstract

An exhaust treatment system for an engine is disclosed and may have an air induction circuit, an exhaust circuit, and an exhaust recirculation circuit. The air induction circuit may be configured to direct air into the engine. The exhaust circuit may be configured to direct exhaust from the engine and include a turbine driven by the exhaust, a particulate filter disposed in series with and downstream of the turbine, and a catalytic device disposed in series with and downstream of the particulate filter. The exhaust recirculation circuit may be configured to selectively redirect at least some of the exhaust from between the particulate filter and the catalytic device to the air induction circuit. The catalytic device is selected to create backpressure within the exhaust circuit sufficient to ensure that, under normal engine operating conditions above low idle, exhaust can flow into the air induction circuit without throttling of the air.

Inventors:
 [1];  [2];  [3];  [4];  [2]
  1. West Peoria, IL
  2. Dunlap, IL
  3. Washington, IL
  4. Chillicothe, IL
Issue Date:
Research Org.:
Caterpillar Inc., Deerfield, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
988813
Patent Number(s):
7591131
Application Number:
11/606,332
Assignee:
Caterpillar Inc. (Peoria, IL)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02M - SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
DOE Contract Number:  
FC05-00OR22806
Resource Type:
Patent
Resource Relation:
Patent File Date: 2006 Nov 30
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Easley, Jr William Lanier, Milam, David Michael, Roozenboom, Stephan Donald, Bond, Michael Steven, and Kapic, Amir. Low pressure EGR system having full range capability. United States: N. p., 2009. Web.
Easley, Jr William Lanier, Milam, David Michael, Roozenboom, Stephan Donald, Bond, Michael Steven, & Kapic, Amir. Low pressure EGR system having full range capability. United States.
Easley, Jr William Lanier, Milam, David Michael, Roozenboom, Stephan Donald, Bond, Michael Steven, and Kapic, Amir. Tue . "Low pressure EGR system having full range capability". United States. https://www.osti.gov/servlets/purl/988813.
@article{osti_988813,
title = {Low pressure EGR system having full range capability},
author = {Easley, Jr William Lanier and Milam, David Michael and Roozenboom, Stephan Donald and Bond, Michael Steven and Kapic, Amir},
abstractNote = {An exhaust treatment system for an engine is disclosed and may have an air induction circuit, an exhaust circuit, and an exhaust recirculation circuit. The air induction circuit may be configured to direct air into the engine. The exhaust circuit may be configured to direct exhaust from the engine and include a turbine driven by the exhaust, a particulate filter disposed in series with and downstream of the turbine, and a catalytic device disposed in series with and downstream of the particulate filter. The exhaust recirculation circuit may be configured to selectively redirect at least some of the exhaust from between the particulate filter and the catalytic device to the air induction circuit. The catalytic device is selected to create backpressure within the exhaust circuit sufficient to ensure that, under normal engine operating conditions above low idle, exhaust can flow into the air induction circuit without throttling of the air.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {9}
}

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