Unburned hydrocarbon would increase over a wide range of equivalent ratio shortening the time interval between injection timing and ignition timing can decrease the value to that of homogeneous mixture combustion .

与均匀 混合气 燃烧相比，碳氢的 排放增加，缩短喷射时刻与点火时刻的时间差可达到 均匀 混合 气燃烧时相同的排放量。