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:
- Issue Date:
- Research Org.:
- GM Global Technology Operations LLC, Detroit, MI (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1438407
- Patent Number(s):
- 9957911
- Application Number:
- 15/046,580
- Assignee:
- GM Global Technology Operations LLC (Detroit, MI)
- 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
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
- 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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