Study on autoignition and combustion completion of n-butane in a two-stroke homogeneous charge compression ignition (HCCI) engine

摘要

Homogeneous Charge Compression Ignition (HCCI) is good method for higher efficiency and to reduce NO{sub}x emission and particulate matter together than conventional SI combustion engine. But HCCI depends on chemical reaction of fuel and air mixture. So controlling of ignition timing is difficult, and HCCI is high THC and CO emissions because temperature can't reach high enough temperature to reduce those. In this study, we investigated factor for auto ignition timing and combustion completion on n-Butane/air mixture by a two-stroke HCCI engine. Auto Ignition temperature is known to be decided by fuel, for n-Butane, the temperature was 1150±30K. And as we researched combustion completion from in-cylinder gas temperature, increasing in- cylinder gas temperature caused high combustion efficiency and low THC, CO emissions.