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Title: Dedicated exhaust gas recirculation control systems and methods

Abstract

An engine control system of a vehicle includes a fuel control module that controls fuel injection of a first cylinder of an engine based on a first target air/fuel ratio that is fuel lean relative to a stoichiometric air/fuel ratio and that controls fuel injection of a second cylinder of the engine based on a second target air/fuel ratio that is fuel rich relative to stoichiometry. The first cylinder outputs exhaust to a first three way catalyst (TWC), and the second cylinder outputs exhaust to an exhaust gas recirculation (EGR) valve. An EGR control module controls opening of the EGR valve to: (i) a second TWC that reacts with nitrogen oxides (NOx) in the exhaust and outputs ammonia to a selective catalytic reduction (SCR) catalyst; and (ii) a conduit that recirculates exhaust back to an intake system of the engine.

Inventors:
; ;
Publication Date:
Research Org.:
GM Global Technology Operations LLC, Detroit, MI (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1438407
Patent Number(s):
9,957,911
Application Number:
15/046,580
Assignee:
GM Global Technology Operations LLC (Detroit, MI) NVO
DOE Contract Number:  
EE00006853
Resource Type:
Patent
Resource Relation:
Patent File Date: 2016 Feb 18
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Sczomak, David P., Narayanaswamy, Kushal, and Keating, Edward J. Dedicated exhaust gas recirculation control systems and methods. United States: N. p., 2018. Web.
Sczomak, David P., Narayanaswamy, Kushal, & Keating, Edward J. Dedicated exhaust gas recirculation control systems and methods. United States.
Sczomak, David P., Narayanaswamy, Kushal, and Keating, Edward J. Tue . "Dedicated exhaust gas recirculation control systems and methods". United States. https://www.osti.gov/servlets/purl/1438407.
@article{osti_1438407,
title = {Dedicated exhaust gas recirculation control systems and methods},
author = {Sczomak, David P. and Narayanaswamy, Kushal and Keating, Edward J.},
abstractNote = {An engine control system of a vehicle includes a fuel control module that controls fuel injection of a first cylinder of an engine based on a first target air/fuel ratio that is fuel lean relative to a stoichiometric air/fuel ratio and that controls fuel injection of a second cylinder of the engine based on a second target air/fuel ratio that is fuel rich relative to stoichiometry. The first cylinder outputs exhaust to a first three way catalyst (TWC), and the second cylinder outputs exhaust to an exhaust gas recirculation (EGR) valve. An EGR control module controls opening of the EGR valve to: (i) a second TWC that reacts with nitrogen oxides (NOx) in the exhaust and outputs ammonia to a selective catalytic reduction (SCR) catalyst; and (ii) a conduit that recirculates exhaust back to an intake system of the engine.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}

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Works referenced in this record:

Three-Way Catalyst Design for Urealess Passive Ammonia SCR: Lean-Burn SIDI Aftertreatment System
conference, April 2011

  • Kim, Chang Hwan; Perry, Kevin; Viola, Michael
  • SAE 2011 World Congress & Exhibition
  • DOI: 10.4271/2011-01-0306