Fundamental Studies on CAI/HCCI combustion
Researchers: A. Oakley, Dr. Z. Peng, K. Man
Supervisors: Prof. H. Zhao, Dr. T. Ma, Prof. N. Ladommatos
Sponsors: EU, EPSRC
Objective
To study the effect of the following engine parameters on CAI / HCCI combustion:
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Air / Fuel Ratio
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External EGR Rate
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Compression Ratio
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Alternative Fuels
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Valve Timings
Summary
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CAI / HCCI boundaries defined
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RON is not suitable in CAI / HCCI study
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Methanol is extremely tolerant to EGR
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Auto-ignition timing and combustion duration are strongly affected by AFR and EGR
Results from a Ricardo E6 engine, 1500rpm, WOT
(Left) Gasoline Autoignition timing (Right) Gasoline Combustion duration
Methanol Autoignition timing
