Characterization of partially premixed combustion

Christof Noehre*, Magnus Andersson, Bengt Johansson, Anders Hultqvist

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

207 Scopus citations


Partially Premixed Combustion (PPC) provides the potential of simultaneous reduction of NOx and soot for diesel engines. This work attempts to characterize the operating range and conditions required for PPC. The characterization is based on the evaluation of emission and in-cylinder measurement data of engine experiments. It is shown that the combination of low compression ratio, high EGR rate and engine operation close to stoichiometric conditions enables simultaneous NOx and soot reduction at loads of 8bar, 12bar, and 15bar IMEP gross. The departure from the conventional NOx-soot trade-off curve has to be paid with a decline in combustion efficiency and a rise in HC and CO emissions. It is shown that the low soot levels of PPC come along with long ignition delay and low combustion temperature. A further result of this work is that higher inlet pressure broadens the operating range of Partially Premixed Combustion.

Original languageEnglish (US)
StatePublished - Dec 1 2006
EventPowertrain and Fluid Systems Conference and Exhibition - Toronto, ON, Canada
Duration: Oct 16 2006Oct 19 2006


OtherPowertrain and Fluid Systems Conference and Exhibition
CityToronto, ON

ASJC Scopus subject areas

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


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