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01-06-2019 | Cover Story | Issue 6/2019

Emissions
MTZ worldwide 6/2019

State-of-the-art Exhaust Gas Treatment

Journal:
MTZ worldwide > Issue 6/2019
Author:
Marc Ziegler
The introduction of catalytic converters has had a massive influence on the cleanliness of the air in our cities. In recent years, a better understanding of the harm that exhaust emissions can cause has led to the ongoing development of exhaust gas treatment systems, with a particular focus on diesel engines, which produce both soot and high levels of NO x. While removing particles from engine emissions with diesel particulate filters was a relatively easy process, nitrogen oxides presented a much more difficult challenge to overcome. The more efficient the combustion process, in other words the closer lean-burn gasoline engines come to their much more efficient diesel counterparts, the bigger the problem. Active filters and carefully managed exhaust gas recirculation systems are needed to keep emissions of these harmful gases to a minimum and to help avert imminent and existing driving bans. The recent introduction of the RDE and increasingly stringent legislation have led to the need for even more efficient exhaust treatment systems. This affects all cars with combustion engines, but the emphasis is once again on diesel engines, which will play an essential role in enabling us to meet our climate targets. The unrestricted use of diesel vehicles will only be possible in the future if we can succeed in complying with emission thresholds in practice, but we cannot achieve this simply by reducing raw emissions. ...

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