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

Abstract

Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust aftertreatment 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.

Inventors:
;
Issue Date:
Research Org.:
Cummins Inc. Columbus, IN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1343762
Patent Number(s):
9567888
Application Number:
14/461,952
Assignee:
Cummins Inc.
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
EE0004125
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Aug 18
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS

Citation Formats

Gupta, Aniket, and Cunningham, Michael J. Systems and methods to reduce reductant consumption in exhaust aftertreament systems. United States: N. p., 2017. Web.
Gupta, Aniket, & Cunningham, Michael J. Systems and methods to reduce reductant consumption in exhaust aftertreament systems. United States.
Gupta, Aniket, and Cunningham, Michael J. Tue . "Systems and methods to reduce reductant consumption in exhaust aftertreament systems". United States. https://www.osti.gov/servlets/purl/1343762.
@article{osti_1343762,
title = {Systems and methods to reduce reductant consumption in exhaust aftertreament systems},
author = {Gupta, Aniket and Cunningham, Michael J.},
abstractNote = {Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust aftertreatment 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 = {2017},
month = {2}
}

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