A vast study on polluting emissions from cars finds progress but also shortcomings
Glass half full or glass half empty? Always polluting car or cleaner car? The vast and much-anticipated study on real vehicle emissions, commissioned by the government in August 2019, was released on Wednesday, December 16, and finds real progress, but also persistent shortcomings, nearly five years after the investigation.France of a similar magnitude, ordered in the wake of the Volkswagen scandal which, in 2016, brought to light staggering gaps between theoretical standard and real life.
The new study is important."It represents a little over a year of work," said Pierre-Franck Chevet, president of the French Institute of Petroleum and New Energies (Ifpen) which conducted the survey.involved 22 vehicles taken from the existing fleet.The cars, of recent design (Euro 6 d-TEMP standard), have driven nearly 16,000 kilometers in sometimes aggressive driving conditions and in a climatic environment ranging from -5 ° to + 35 °.Nine kinds of pollutants were tested.
Considerable progress, compared to the mid-2010s
What conclusions can we draw from this wealth of data? As for the half-full glass, there is first an overall compliance with environmental standards in all types of tests for 20 out of 22 vehicles.It may seem the least of things but it is about a considerable improvement compared to the mid-2010s, when the aim of the manufacturers seemed to be limited to passing the homologation of vehicles without worrying about the actual driving.This improvement is very spectacular for the eight diesels tested, which prove to be meet the standards for very toxic nitrogen oxides Nox (80 mg/km), even in dynamic driving, with two exceptions.
Posted Date: 2020-12-23