How EGR (Exhaust gas recirculation) works?

NOx

NOx emissions are very dangerous. They are responsible for acid rain, Smog, breathing related problems and much more. They are also responsible for global warming. There are many sources of NOx mainly being burning of fossil fuels in power plants and automobiles.
One interesting thing to be noted here is in a combustion chamber,
NOx forms only at elevated temperatures as the reaction is
endothermic.

Diesel Particulate Filter-DPF

Particulate matter is one of the most common and harmful constituents of the engine`s exhaust. Diesel engines produce more particulate matter than any other fuel. Since pollution norms are becoming stringent decade after decade (Remember we are skipping BS-5 and preponing BS-6) manufacturers come up with new technologies for holding a position in the market. … Read more