Estimation of transient intake burned gas and reformate mass fractions in a dedicated EGR engine

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 H₂ 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.

• Record URL:
  • https://doi.org/10.1177/14680874231203728
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/14680874
• Supplemental Notes:
  • © IMechE 2023.
• Authors:
  • Kang, Jun-Mo
  • 0009-0006-6622-6880
• Publication Date: 2024-3

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 484-493
• Serial:
  • International Journal of Engine Research
  • Volume: 25
  • Issue Number: 3
  • Publisher: Sage Publications, Incorporated
  • ISSN: 1468-0874
  • EISSN: 20413149

Subject/Index Terms

• TRT Terms: Combustion; Exhaust gas recirculation; Exhaust gases; Fuel air mixtures; Fuel consumption; Spark ignition engines
• Subject Areas: Energy; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01914431
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 15 2024 8:38AM