%0 Journal Article %A Ulugbek Azimov and Eiji Tomita and Nobuyuki Kawahara and Sharul Sham Dol %D 2012 %J International Journal of Mechanical and Mechatronics Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 72, 2012 %T Combustion Characteristics of Syngas and Natural Gas in Micro-pilot Ignited Dual-fuel Engine %U https://publications.waset.org/pdf/14180 %V 72 %X The objective of this study is to investigate the combustion in a pilot-ignited supercharged dual-fuel engine, fueled with different types of gaseous fuels under various equivalence ratios. It is found that if certain operating conditions are maintained, conventional dual-fuel engine combustion mode can be transformed to the combustion mode with the two-stage heat release. This mode of combustion was called the PREMIER (PREmixed Mixture Ignition in the End-gas Region) combustion. During PREMIER combustion, initially, the combustion progresses as the premixed flame propagation and then, due to the mixture autoignition in the end-gas region, ahead of the propagating flame front, the transition occurs with the rapid increase in the heat release rate. %P 2863 - 2870