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

Patent ·
OSTI ID:1492045
;

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.

Research Organization:
Cummins Inc., Columbus, IN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
EE0004125
Assignee:
Cummins Inc. (Columbus, IN)
Patent Number(s):
10,113,465
Application Number:
15/389,625
OSTI ID:
1492045
Resource Relation:
Patent File Date: 2016 Dec 23
Country of Publication:
United States
Language:
English

References (24)

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LNT regeneration strategy over normal truck driving cycle patent March 2010
Selective catalytic reduction system patent October 2010
Catalyzed SCR filter and emission treatment system patent March 2011
SCR on low thermal mass filter substrates patent August 2011
System and method of NOx abatement patent October 2011
NOx reduction device for diesel vehicles patent April 2012
System and method for injecting ammonia into an exhaust gas stream patent October 2013
Aftertreatment system having two SCR catalysts patent April 2015

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