Effects of ethanol and different type of gasoline fuels on partially premixed combustion from low to high load

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


The behavior of Ethanol and seven fuels in the boiling point range of gasoline but with an Octane Number spanning from 69 to 99 was investigated in Partially Premixed Combustion. A load sweep was performed from 5 to 18 bar gross IMEP at 1300 rpm. The engine used in the experiments was a single cylinder Scania D12. To allow high load operations and achieve sufficient mixing, the compression ratio was decreased from the standard 18:1 to 14.3:1. It was shown that by using only 50% of EGR it is possible to achieve NOx below 0.30 g/kWh even at high loads. At 18 bar IMEP soot was in the range of 1-2 FSN for the gasoline fuels while it was below 0.06 FSN with Ethanol. The use of high boost combined with relatively short combustion duration allowed reaching gross indicated efficiencies in the range of 54 - 56%. At high load the partial stratified mixture allowed to keep the maximum pressure rise rate below 15 bar/CAD with most of the fuels. The brake parameters were estimated and it was found that brake NOx can be far below the EU VI target value and the brake efficiency higher than 48.5 %. According to emissions and efficiency considerations the fuels were classified and it was found that with this specific compression ratio the most suitable fuel for this combustion concept has to have a RON slightly below 90.


  • Vittorio Manente
  • Per Tunestal
  • Bengt Johansson
  • William J. Cannella
External organisations
  • Chevron
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering
Original languageEnglish
Title of host publicationSAE Technical Papers
Number of pages13
Publication statusPublished - 2010
Publication categoryResearch
EventSAE 2010 World Congress and Exhibition - Detroit, MI, United States
Duration: 2010 Apr 132010 Apr 13


ConferenceSAE 2010 World Congress and Exhibition
CountryUnited States
CityDetroit, MI