Nowadays, climate change that caused from air pollution has become a major problem on the agenda of almost all countries around the world. Compared to other air pollutants, NOx emissions have an important share in climate change, and especially diesel vehicles are one of the most important sources for the formation of NOx pollutants. This chapter focused on NOx emissions from diesel vehicles and the trends in NOx control technologies; Exhaust Gas Recirculation (EGR), Lean NOx trap (LNT) and Selective Catalytic Reduction of NOx by ammonia (NH3-SCR) and hydrocarbons (HC-SCR). The reasons of the NOx emissions, environmental effects and damages on human health, NOx emissions from diesel engines and diesel engine parameters affecting NOx emissions are handled in detail. The EGR, LNT and SCR technologies that had large reduction rates of NOx emissions and the latest developments in these systems are comprehensively explained.
Part of the book: Diesel and Gasoline Engines