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. 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:
- 1492045
- Patent Number(s):
- 10113465
- Application Number:
- 15/389,625
- Assignee:
- Cummins Inc. (Columbus, IN)
- 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: 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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