Since mid May 2016, Real Driving Emissions (RDE) measurements have been compulsory for all vehicle manufacturers in the EU as well as in Switzerland, Turkey, Norway, Liechtenstein and Israel. In these RDE tests, the pollutant emissions, such as particulate matter and nitrogen oxides (NOx), are measured directly on the road. This method determines average emission values that can be expected during everyday driving.
In order to further reduce pollutant values in everyday use, the BMW Group is applying various technologies in its models for reducing exhaust emissions.
The BMW BluePerformance measures, for example, reduce the emission of nitrogen oxides in diesel engines. With the introduction of the new 6-cylinder engine generation for the diesel as from 2020, the storage catalytic converter located close to the engine is replaced by an even more efficient SCR system, also close to the engine. As a result, NOx conversion is further improved, especially during urban driving. A second SCR catalytic converter, located as before in the underbody, provides additional support, and, depending on the vehicle, has its own AdBlue dosing system.
The BMW Group was the first vehicle manufacturer to introduce the combination of NOx storage catalytic converter and SCR system into series production. By establishing double AdBlue dosing, BMW is again setting new standards in the purification of exhaust gases and pollutant reduction.
Furthermore, since 2006 diesel vehicles have been equipped with particle filters as standard in order to reduce particulate matter. In the petrol-engine models, too, special particle filters re now in operation across the range.
In this way, BMW is able to comply with the RDE threshold limit values of the EU6d exhaust emissions standard, which has been compulsory for all new vehicles since January 2020. In contrast to EU6c, the EU6d exhaust emissions standard now also defines threshold limit values for the number of particles and nitrogen oxides in RDE test runs.