Numerical study on the low emission window of homogeneous charge compression ignition diesel combustion

Sungwook Park, Rolf D. Reitz

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

This article describes a numerical study of the low emission window (lower than 10g/kg-f CO, 10g/kg-f HC, 0.5g/kg-f NO and almost soot-less) of diesel HCCI combustion. In order to locate low emission operating conditions, parametric calculations were performed over wide ranges by changing equivalence ratio, inlet temperature, intake valve closure timing, engine speed and fuel amount under the assumption of ideal homogeneous charge. The CO, HC, NO and soot emissions are summarized on equivalence ratio-peak cycle temperature maps, and the low emission region was found to be located in the region approximately from 1,600K to 1,800K peak cycle temperature, and on the lean side of stoichiometric equivalence ratio. In addition, it is revealed that clean HCCI combustion is possible with reduced EGR levels by retarding the intake valve closure timing, and the low emission window moves toward higher temperatures as engine speed is increased.

Original languageEnglish
Pages (from-to)2279-2307
Number of pages29
JournalCombustion Science and Technology
Volume179
Issue number11
DOIs
StatePublished - 2007 Nov 1

Fingerprint

ignition
Ignition
Intake valves
Soot
equivalence
Carbon Monoxide
soot
closures
engines
Engines
Temperature
time measurement
inlet temperature
cycles
retarding
temperature

Keywords

  • Emission maps
  • HCCI combustion
  • Low emission window
  • Variable valve actuation

Cite this

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Numerical study on the low emission window of homogeneous charge compression ignition diesel combustion. / Park, Sungwook; Reitz, Rolf D.

In: Combustion Science and Technology, Vol. 179, No. 11, 01.11.2007, p. 2279-2307.

Research output: Contribution to journalArticle

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