Effect of charge dilution on gaseous and particulate emissions from a diesel engine fueled with biodiesel and biodiesel blended with methanol and ethanol

Lei Zhu, Chun Shun Cheung, W. G. Zhang, Zhen Huang

Research output: Journal article publicationReview articleAcademic researchpeer-review

38 Citations (Scopus)


In this study, the effect of intake charge dilution with carbon dioxide on the combustion and emission characteristics of a 4-cylinder direct-injection diesel engine fueled with biodiesel, ethanol-biodiesel and methanol-biodiesel were investigated. With increase of intake CO2concentration, CO, HC, particulate mass concentration, particle number concentration and geometric diameter (GMD) of all fuels increased while NOxdecreased obviously. After addition of methanol and ethanol in biodiesel, the NOx, particulate mass concentration and particle number concentration decreased at each intake CO2concentration, compared with biodiesel. Moreover, as the intake CO2concentration increased from 2% to 5.6%, particulate mass concentration of the alcohol-biodiesel blends remained almost unchanged. It means that the combination of alcohol-biodiesel blends with intake charge dilution could reduce the NOxemission and maintains particulate mass concentration at a relatively low level.
Original languageEnglish
Pages (from-to)2271-2278
Number of pages8
JournalApplied Thermal Engineering
Issue number14-15
Publication statusPublished - 1 Oct 2011


  • Biodiesel
  • Charge dilution
  • Diesel engine
  • Gaseous emissions
  • Particulate emissions

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this