Diesel engine aftertreatment warm-up through early exhaust valve opening and internal exhaust gas recirculation during idle operation

A large fraction of diesel engine tailpipe NOₓ emissions are emitted before the aftertreatment components reach effective operating temperatures. As a result, it is essential to develop technologies to accelerate initial aftertreatment system warm-up. This study investigates the use of early exhaust valve opening (EEVO) and its combination with negative valve overlap to achieve internal exhaust gas recirculation (iEGR), for aftertreatment thermal management, both at steady state loaded idle operation and over a heavy-duty federal test procedure (HD-FTP) drive cycle. The results demonstrate that implementing EEVO with iEGR during steady state loaded idle conditions enables engine outlet temperatures above 400 °C, and when implemented over the HD-FTP, is expected to result in a 7.9% reduction in tailpipe-out NOₓ.

  • Record URL:
  • Availability:
  • Supplemental Notes:
    • © IMechE 2017.
  • Authors:
    • Gosala, Dheeraj B
    • Ramesh, Aswin K
    • Allen, Cody M
    • Joshi, Mrunal C
    • Taylor, Alexander H
    • Van Voorhis, Matthew
    • Shaver, Gregory M
    • Farrell, Lisa
    • Koeberlein, Edward
    • McCarthy Jr, James
    • Stretch, Dale
  • Publication Date: 2018-9


  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 758-773
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01713904
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 24 2019 4:49PM