Evaluation on the Effects of Compression Ratio, CO_2 and LPG on HCCI Combustion Fueled with DME

A 2-135 C.I. engine was modified to a DME(dimethyl-ether) HCCI(homogeneous charge compression ignition) combustion. The experimental results show that DME HCCI combustion produces almost zero NO_x emission and smokeless exhaust. Within the engine load range, the emissions of CO and HC decrease with the increase of engine load. The HCCI combustion of DME displays remarkable two-stage combustion cha…