3. Link between technological solutions and the reduction of automobile emissions

While regulations have evolved with a new test procedure (WLTP) and a new cycle (WLTC) in 2017, it is the introduction of the RDE protocol with the notion of limit values not to be exceeded in NOx and PM under real driving conditions that is now driving the development of engine pollution control systems. This will enable a significant reduction in the automotive contribution to emissions, leading to an improvement in air quality. Figure 30 illustrates this, based on actual average NOx emissions from diesel vehicles. Euro 5 and Euro 6b emissions observed by various NGOs (T&E,...