Abstract
Passive selective catalytic reduction (SCR) has emerged as a promising NOx reduction technology for highly-efficient lean-burn gasoline engines to meet stringent NOx emission regulation in a cost-effective manner. In this study, a prototype passive SCR which includes an upstream three-way catalyst (TWC) with added NOx storage component, and a downstream urealess SCR catalyst, was investigated. Engine experiments were conducted to investigate and quantify the dynamic NOx storage/release behaviors as well as dynamic NH3 generation behavior on the new TWC with added NOx storage component. Then, the lean/rich mode-switching timing control was optimized to minimize the fuel penalty associated with passive SCR operation. Simulation results show that, compared to the baseline mode-switching timing control, the optimized control can reduce the passive SCR-related fuel penalty by 6.7%. Such an optimized mode-switching timing control strategy is rather instrumental in realizing significant fuel efficiency benefits for lean-burn gasoline engines coupled with cost-effective passive SCR systems.
Original language | English |
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Title of host publication | Control and Optimization of Connected and Automated Ground Vehicles; Dynamic Systems and Control Education; Dynamics and Control of Renewable Energy Systems; Energy Harvesting; Energy Systems; Estimation and Identification; Intelligent Transportation and Vehicles; Manufacturing; Mechatronics; Modeling and Control of IC Engines and Aftertreatment Systems; Modeling and Control of IC Engines and Powertrain Systems; Modeling and Management of Power Systems |
Publisher | American Society of Mechanical Engineers (ASME) |
ISBN (Electronic) | 9780791851906 |
DOIs | |
State | Published - 2018 |
Event | ASME 2018 Dynamic Systems and Control Conference, DSCC 2018 - Atlanta, United States Duration: Sep 30 2018 → Oct 3 2018 |
Publication series
Name | ASME 2018 Dynamic Systems and Control Conference, DSCC 2018 |
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Volume | 2 |
Conference
Conference | ASME 2018 Dynamic Systems and Control Conference, DSCC 2018 |
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Country/Territory | United States |
City | Atlanta |
Period | 09/30/18 → 10/3/18 |
Funding
2 This manuscript has been co-authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-