The effect of fuel volatility on HCCI using simultaneous formaldehyde and OH PLIF

Robert Collin*, Jenny Nygren, Mattias Richter, Marcus Aldén, Leif Hildingsson, Bengt Johansson

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

7 Scopus citations

Abstract

Simultaneous formaldehyde and OH PLIF have been applied in a direct-injected HCCI engine. The engine is a 0.5 l single-cylinder optical engine equipped with EGR system. PLIF measurements were performed with the engine run with two different fuels of low and high volatility, respectively. Different ratios of EGR were also examined. The aim of the study was to investigate how fuels with different volatility and EGR affect the HCCI combustion and measurements were performed for early and late injection timings. Measurements are presented for different injection timings showing formaldehyde and OH from start of injection until late in the expansion stroke. Also, formaldehyde distributions obtained from after the low temperature regime and before the high temperature regime are studied for different tuning of the start of injection from 300CAD to 20CAD before top dead center. In this investigation the spatial homogeneity of the formaldehyde distributions and the surface fraction of LIF signal covering the image are compared for the different fuels and EGR ratios.

Original languageEnglish (US)
DOIs
StatePublished - Dec 1 2004
EventPowertrain and Fluid Systems Conference and Exhibition - Tampa, FL, United States
Duration: Oct 25 2004Oct 28 2004

Other

OtherPowertrain and Fluid Systems Conference and Exhibition
CountryUnited States
CityTampa, FL
Period10/25/0410/28/04

ASJC Scopus subject areas

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

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