Comparison of diesel combustion between ethanol and butanol blended with gas oil

Shohei Yamamoto, Yasuhiro Agui, Noritsune Kawaharada, Hironobu Ueki, Daisaku Sakaguchi, Masahiro Ishida

Research output: Contribution to journalConference articlepeer-review

11 Citations (Scopus)


In order to realize a premixed compression ignition (PCI) engine by utilization of bio-alcohol, combustion characteristics of bio-alcohol blended with gas oil were compared between ethanol and n-butanol in a diesel engine. The effects of the ethanol blend ratio and the butanol blend ratio on ignition delay, premixed combustion, diffusion combustion, fuel consumption and exhaust emissions such as smoke density and NOx were investigated experimentally. It is found that ethanol almost burns out together with combustion of low evaporation temperature composition of gas oil in the premixed combustion period and the heat release in the diffusion combustion is based on mainly high evaporation temperature composition of gas oil, then, soot is formed in the diffusion combustion of gas oil. On the other hand, a part of butanol burns in the diffusion combustion, however, the combustion of butanol in the diffusion stage is not the cause of soot formation. Butanol is more useful in comparison with ethanol because butanol can be blended with gas oil without surface-active agent, and fuel consumption and smoke are almost equal in both blend fuels if the alcohol blend ratio is the same.

Original languageEnglish
JournalSAE Technical Papers
Publication statusPublished - 2012
Externally publishedYes
Event2012 Small Engine Technology Conference and Exhibition, SETC 2012 - Madison, WI, United States
Duration: Oct 16 2012Oct 18 2012

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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