Abstract
Lean burn gasoline engine is a promising technology for reducing the fuel consumption by passenger cars. However, cost-effective NOx emissions control for lean burn gasoline engines remains a great challenge for the commercialization of lean burn gasoline engines in the U. S. market. To address this issue, passive selective catalytic reduction (SCR), which utilizes a close-coupled three-way catalyst (TWC) as an on-board device for ammonia (NH3) production during rich engine operation, has attracted much attention in the past several years. The main purpose of this study is to reduce the cost of ammonia generation for a passive SCR system by proposing a new passive SCR system architecture and an innovative non-uniform cylinder-to-cylinder combustion (NUCCC) strategy. The new passive SCR system that consists of a two-stage TWC and a TWC bypass, together with the optimization of NUCCC strategy, can potentially enable more efficient engine combustion and more cost-effective ammonia production. Optimization results based on the experimental data from a physical engine platform, demonstrate that the proposed new passive SCR system coupled with the NUCCC strategy, can reduce the ammonia specific fuel consumption (ASFC) by up to 29.8%. Such a novel engine combustion strategy and innovative aftertreatment system can be very instrumental in significantly reducing the fuel penalty associated with NOx emission control for lean-burn engines in the future.
| Original language | English |
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| Title of host publication | 2018 Annual American Control Conference, ACC 2018 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 19-24 |
| Number of pages | 6 |
| ISBN (Print) | 9781538654286 |
| DOIs | |
| State | Published - Aug 9 2018 |
| Event | 2018 Annual American Control Conference, ACC 2018 - Milwauke, United States Duration: Jun 27 2018 → Jun 29 2018 |
Publication series
| Name | Proceedings of the American Control Conference |
|---|---|
| Volume | 2018-June |
| ISSN (Print) | 0743-1619 |
Conference
| Conference | 2018 Annual American Control Conference, ACC 2018 |
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| Country/Territory | United States |
| City | Milwauke |
| Period | 06/27/18 → 06/29/18 |
Funding
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-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan)