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Title: Systems and methods to reduce reductant consumption in exhaust aftertreatment systems

Abstract

Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust after treatment system that includes a first SCR device and a downstream second SCR device, a first reductant injector upstream of the first SCR device, and a second reductant injector between the first and second SCR devices. NO x conversion occurs with reductant injection by the first reductant injector to the first SCR device in a first temperature range and with reductant injection by the second reductant injector to the second SCR device when the temperature of the first SCR device is above a reductant oxidation conversion threshold.

Inventors:
;
Publication Date:
Research Org.:
Cummins Inc., Columbus, IN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1492045
Patent Number(s):
10,113,465
Application Number:
15/389,625
Assignee:
Cummins Inc. (Columbus, IN) DOEEE
DOE Contract Number:  
EE0004125
Resource Type:
Patent
Resource Relation:
Patent File Date: 2016 Dec 23
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Gupta, Aniket, and Cunningham, Michael J. Systems and methods to reduce reductant consumption in exhaust aftertreatment systems. United States: N. p., 2018. Web.
Gupta, Aniket, & Cunningham, Michael J. Systems and methods to reduce reductant consumption in exhaust aftertreatment systems. United States.
Gupta, Aniket, and Cunningham, Michael J. Tue . "Systems and methods to reduce reductant consumption in exhaust aftertreatment systems". United States. https://www.osti.gov/servlets/purl/1492045.
@article{osti_1492045,
title = {Systems and methods to reduce reductant consumption in exhaust aftertreatment systems},
author = {Gupta, Aniket and Cunningham, Michael J.},
abstractNote = {Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust after treatment system that includes a first SCR device and a downstream second SCR device, a first reductant injector upstream of the first SCR device, and a second reductant injector between the first and second SCR devices. NOx conversion occurs with reductant injection by the first reductant injector to the first SCR device in a first temperature range and with reductant injection by the second reductant injector to the second SCR device when the temperature of the first SCR device is above a reductant oxidation conversion threshold.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {10}
}

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Works referenced in this record:

Selective catalytic reduction
patent, September 2007