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The Effect of Fuel Volatility on Hcci Using Simultaneous Formaldehyde and Oh Plif

In English

Författare

Summary, in English

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 300 CAD to 20 CAD 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.

Publiceringsår

2004

Språk

Engelska

Publikation/Tidskrift/Serie

SAE Technical Papers

Issue

2004-01-2948

Dokumenttyp

Artikel i tidskrift

Förlag

Society of Automotive Engineers

Ämne

  • Atom and Molecular Physics and Optics
  • Other Mechanical Engineering

Nyckelord

  • Combustion engines laser diagnostics optical

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0148-7191