NOx and N2O formation in HCCI engines

Per Amnéus*, Fabian Mauss, Markus Kraft, Andreas Vressner, Bengt Johansson

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

15 Scopus citations

Abstract

Calculations using homogeneous and stochastic reactor models were performed in order to find an explanation to observed properties of NOx HCCI engines. It was found that for moderate NOx levels, N2O reactions play an important role in the NOx formation. Further, the high proportions of NO2 found in from some HCCI engines is due to high temperature inhomogeneities, poor mixing and slow overall combustion. N2O is often emitted from HCCI combustion. The levels of NOx in the exhausts are highly sensitive to temperature; however N2O has a weak negative dependence on temperature. While fuel rich operation naturally leads to high temperatures and thus high NOx levels; once the temperature effects are decoupled the fuel rich conditions themselves has a favorable effect on low-NOx engine operation.

Original languageEnglish (US)
DOIs
StatePublished - Dec 1 2005
Event2005 SAE World Congress - Detroit, MI, United States
Duration: Apr 11 2005Apr 14 2005

Other

Other2005 SAE World Congress
CountryUnited States
CityDetroit, MI
Period04/11/0504/14/05

ASJC Scopus subject areas

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

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