Independent testing by France's UTAC (Technical Union for the Automobile, Motorcycle and Cycle Industries) have confirmed that diesel engines produced by the PSA Peugeot Citroen group complies with regulations and are aligned with the manufacturer's claimed CO2 emissions.
These results confirm the effectiveness of the exclusive BlueHDi after-treatment system, in which selective catalytic reduction (SCR) technology is positioned upstream of the particulate filter to eliminate up to 90 percent of the nitrogen oxides (NOx) released by diesel engines and bring NOx emissions down to levels near those of petrol engines. At the same time, diesel engines maintain their advantage of 15 percent lower CO2 emissions and 20 percent greater fuel efficiency. BlueHDi is now recognised across the industry and by outside observers as the most effective system for treating NOx emissions.
The PSA Peugeot Citroen group is a world leader in clean diesel engine technology, and had recently won the 2015 International Engine of the Year (1.1 to 1.4-litre category).
Convinced by SCR's potential to reduce carbon emissions in diesel engines, the group developed this technology so it could be deployed in late-2013, two years before mandated by European regulations.
The system was then gradually added as standard equipment on all Euro 6-compliant diesel models. The development of SCR technology represented an investment of several hundred million euros. PSA Peugeot Citroën has filed some one hundred patents for BlueHDi technology, which has undergone continuous development with a view to improving performance and cost in time for the new Euro 6.2 emissions standards in September 2017.
PSA Peugeot Citroën is currently developing its second generation of electric vehicles, as well as a new range of plug-in petrol hybrids for launch in 2019.