Innovative twin dosing reduces NOx emissions by 80 percent
Since 2018, only SCR exhaust gas treatment systems have been used in Volkswagen models with Diesel engines. SCR (selective catalytic reduction) technology significantly reduces nitrogen oxides in the exhaust gas.
Volkswagen has now developed the next stage of the SCR system – so-called “twin dosing”. Adblue is injected selectively upstream of two SCR catalytic converters which are arranged in series.
Current RDE (real driving emissions) measurements confirm Volkswagen's type approval: in the new 2.0 TDI Evo with twin dosing, NOX levels are reduced by around 80 percent compared to the previous generation of the respective models.
The system is used in the new Passat 2.0 TDI Evo which already meets the technical requirements of the future Euro 6d emission standard. Volkswagen will now gradually introduce the new technology to all models with 2.0 TDI Evo engines.
Following the 2.0 TDI Evo currently fitted in the Passat, the new Golf – soon to see its world premiere – will likewise feature twin dosing in all TDI variants.