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Evaluation of Diesel Low Temperature Combustion Fuel-Injection Strategies at Different Engine Loads

[+] Author Affiliations
Usman Asad

National University of Sciences & Technology, Rawalpindi, Pakistan

Ming Zheng

University of Windsor, Windsor, ON, Canada

Paper No. ICEF2010-35172, pp. 479-489; 11 pages
doi:10.1115/ICEF2010-35172
From:
  • ASME 2010 Internal Combustion Engine Division Fall Technical Conference
  • ASME 2010 Internal Combustion Engine Division Fall Technical Conference
  • San Antonio, Texas, USA, September 12–15, 2010
  • Conference Sponsors: Internal Combustion Engine Division
  • ISBN: 978-0-7918-4944-6 | eISBN: 978-0-7918-3882-2
  • Copyright © 2010 by ASME

abstract

High hydrocarbon levels in the exhaust, increased cycle-to-cycle variation and reduced energy-efficiency are typical problems associated with diesel LTC operation. To overcome these challenges, three different fuel injection strategies (late single-injection, early multiple-injections and split-injections) have been investigated on a modified single cylinder common-rail diesel engine. The effects of EGR, boost and injection pressure on the emissions and combustion efficiency have been analyzed. The effect of heavy EGR has been quantified in terms of a trade-off between the combustion phasing and the combustion efficiency. To minimize fuel condensation and wall-wetting with early injections, a criterion for selecting the earliest timing for injection during the compression stroke has also been evaluated. This research is concluded with the formulation of a load management strategy to enable energy-efficient diesel LTC up to 10 bar IMEP.

Copyright © 2010 by ASME

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