Impact of EGR and engine speed on HCCI engine performance and tail pipe emissions

A. O. Hassan, Ahmad Abu-Jrai, Ala'A H. Al-Muhatseb, Farrukh Jamil

Research output: Contribution to journalArticle

4 Citations (Scopus)


Increasing air-to-fuel ratio has been considered as one of the advantages of HCCI combustion. A diluted in-cylinder mixture leads to lower temperatures and therefore lower NOx emissions. This improvement is due to a higher trapped residual rate in the cylinder when higher lambda is set. Higher lambda means more air therefore more trapped residual is required to deliver enough energy for auto-ignition. Analysis show that HC, CO in HCCI mode are heavily dependent on engine speed. HC emission was influenced by engine speed more than CO and NOx emissions.

Original languageEnglish
Pages (from-to)208-212
Number of pages5
JournalEnergy Procedia
Publication statusPublished - Jan 1 2017



  • Biodiesel
  • fuel
  • green catalyst
  • Phoenix dactylifera kernael oil

ASJC Scopus subject areas

  • Energy(all)

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