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Predicting homogeneous charge compression ignition characteristics of various hydrocarbons
Published July 13, 1999 by Society of Automotive Engineers of Japan in Japan
HCCI (Homogeneous Charge Compression Ignition) combustion has attracted growing attention in recent years because it has a potential for simultaneously improving exhaust gas emissions and fuel consumption in diesel engines. In this paper, a computational study using a combustion model combined with a detailed kinetics was conducted to investigate the HCCI characteristics for n-heptane and natural gas which includes methane, ethane, propane and butane. Effects of initial charge conditions, including intake temperature, intake pressure, air excess ratios, and EGR ratio, on ignition and combustion were investigated. The results indicate the characteristic combustible regions for both fuels.