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Estimation of transient intake burned gas and reformate mass fractions in a dedicated EGR engine.
- Source :
- International Journal of Engine Research (Sage Publications, Ltd.); Mar2024, Vol. 25 Issue 3, p484-493, 10p
- Publication Year :
- 2024
-
Abstract
- An engine with a cylinder dedicated to providing enriched EGR (D-EGR) has been demonstrated by Southwest Research Institute (SwRI). A vehicle equipped with the D-EGR engine showed more than 10% of fuel economy improvement over various driving cycles. Despite a much higher level of EGR than a conventional engine, combustion in the engine is maintained stable since reformates such as H<subscript>2</subscript> and CO from rich combustion increase dilution tolerance. Thus, it is deemed that precise real-time information of the level of reformates in the engine is critical to maintain stable combustion especially during transients. In this paper, a method to estimate intake burned gas and reformate mass fractions of the D-EGR engine is developed and validated through simulations. The estimated fractions can be used to control spark timing in real-time to prevent knocking or misfire during transients in the D-EGR engine. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14680874
- Volume :
- 25
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- International Journal of Engine Research (Sage Publications, Ltd.)
- Publication Type :
- Academic Journal
- Accession number :
- 175633363
- Full Text :
- https://doi.org/10.1177/14680874231203728