Analysis of information sources in references of the Wikipedia article "Homogeneous charge compression ignition" in English language version.
One promising approach is that of Partially-Premixed Compression Ignition (PPCI) or Low Temperature Combustion (LTC) mode. Using this approach, smoke can be reduced in compression ignition engines by promoting the mixing of fuel and air prior to combustion. NOx levels can be reduced by reducing combustion temperatures by burning leaner, pre-mixed or using EGR, exhaust gas recirculation.
One promising approach is that of Partially-Premixed Compression Ignition (PPCI) or Low Temperature Combustion (LTC) mode. Using this approach, smoke can be reduced in compression ignition engines by promoting the mixing of fuel and air prior to combustion. NOx levels can be reduced by reducing combustion temperatures by burning leaner, pre-mixed or using EGR, exhaust gas recirculation.