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Title: System and method for controlling ammonia levels in a selective catalytic reduction catalyst using a nitrogen oxide sensor

Abstract

A system according to the principles of the present disclosure includes an air/fuel ratio determination module and an emission level determination module. The air/fuel ratio determination module determines an air/fuel ratio based on input from an air/fuel ratio sensor positioned downstream from a three-way catalyst that is positioned upstream from a selective catalytic reduction (SCR) catalyst. The emission level determination module selects one of a predetermined value and an input based on the air/fuel ratio. The input is received from a nitrogen oxide sensor positioned downstream from the three-way catalyst. The emission level determination module determines an ammonia level based on the one of the predetermined value and the input received from the nitrogen oxide sensor.

Issue Date:
Research Org.:
GM Global Technology Operations LLC, Detroit, MI (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1372664
Patent Number(s):
9,714,625
Application Number:
13/192,859
Assignee:
GM Global Technology Operations LLC
DOE Contract Number:  
EE0003379
Resource Type:
Patent
Resource Relation:
Patent File Date: 2011 Jul 28
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

. System and method for controlling ammonia levels in a selective catalytic reduction catalyst using a nitrogen oxide sensor. United States: N. p., 2017. Web.
. System and method for controlling ammonia levels in a selective catalytic reduction catalyst using a nitrogen oxide sensor. United States.
. Tue . "System and method for controlling ammonia levels in a selective catalytic reduction catalyst using a nitrogen oxide sensor". United States. https://www.osti.gov/servlets/purl/1372664.
@article{osti_1372664,
title = {System and method for controlling ammonia levels in a selective catalytic reduction catalyst using a nitrogen oxide sensor},
author = {},
abstractNote = {A system according to the principles of the present disclosure includes an air/fuel ratio determination module and an emission level determination module. The air/fuel ratio determination module determines an air/fuel ratio based on input from an air/fuel ratio sensor positioned downstream from a three-way catalyst that is positioned upstream from a selective catalytic reduction (SCR) catalyst. The emission level determination module selects one of a predetermined value and an input based on the air/fuel ratio. The input is received from a nitrogen oxide sensor positioned downstream from the three-way catalyst. The emission level determination module determines an ammonia level based on the one of the predetermined value and the input received from the nitrogen oxide sensor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {7}
}

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