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

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:
OSTI Identifier:
1343762
Assignee:
Cummins Inc. DOEEE
Patent Number(s):
9,567,888
Application Number:
14/461,952
Contract Number:
EE0004125
Resource Relation:
Patent File Date: 2014 Aug 18
Research Org:
Cummins Inc. Columbus, IN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS

Works referenced in this record:

Emission control system
patent, February 2001

Emission control system
patent, August 2001

Catalyzed SCR filter and emission treatment system
patent, June 2007

Selective catalytic reduction
patent, September 2007