Harmful gases emitted from motor vehicles to cities and the environment pollute our atmosphere and threaten life on the planet. The issue of reducing harmful exhaust gases such as Carbon Monoxide, Hydrocarbon, Nitrogen Oxide derivatives and especially particulate matter emissions in diesel vehicles, gains more importance as World population increases. Although electric vehicles have begun to be put into use, for various technical and economic reasons, it seems that engines operating with fossil fuels will continue to serve our society for many years. Given the ever-increasing use of motor vehicles, vehicle manufacturers constantly develop new engine technologies to reduce harmful exhaust gas emissions. The most important development in this regard has been the introduction of catalytic converters, SCR systems and diesel particulate filters that are integrated into the exhaust systems of the vehicles, and they have been in use for a long time and are constantly being developed by more complex Technologies added. Advances in emission reduction techniques continue as countries implement new emission norms.