Diesel. The tests on 52 vehicles confirm standards overruns – Ouest-France

The results of a second wave of emissions testing on diesel 52 vehicles in total, overtaking confirm oxide standards nitrogen (NOx) and C02, including Renault and Opel, according to a record of the Ministry of the Environment released Thursday.

If the controls did not detect fraudulently modified software, as on the first 22 vehicles tested, these confirm “search optimization tests” by manufacturers.

“We have not learned much more than in the first tests (published January 14, Ed) and the results confirm that there are problems with certain manufacturers including Renault and Opel “, told AFP a representative of the Department.

” Since the last time we see that there is clearly an optimization for manufacturers the passage of the test is done in the laboratory while the results are very different on the road, it’s widespread “, she said.

52 vehicles tested a total of 52 vehicles were tested by teams of UTAC-Ceram, including 12 vehicles Renault, Peugeot 9, 6 Citroën, Volkswagen 5, 4 and 3 Ford Opel. The Protocol provides for three types of tests both in the laboratory and on the road.

recorded nitrogen oxide overruns, sometimes from 5 to 10 times the norm, are largely related to the choice pollution control technology made by the manufacturer, say the authors of the report.

So, those using the pollution control system with the NOx trap are less effective.

Regarding the CO2 measurement is simply declarative during the approval, discrepancies were noted on all vehicles tested, with overruns ranging from 12% to over 40%.

in all cases, manufacturers concerned were “invited to provide explanations on the causes of such overruns” .

overruns up to 7 times the standard PSA and BMW are among the good students while the vast majority of other brands (Jeep, Kia, Nissan, Toyota and Fiat in particular) are in the midfield, with overruns of 3 to 7 times the NOx standard .

the technical commission of these assessments was established by the Minister Segolene Royal in the wake of the scandal Volkswagen late 2015.

the first series of tests revealed January 14 showed that, apart from two Volkswagen models already incriminated, further investigations were needed to Ford, Opel, Mercedes Benz, Renault / Dacia, Nissan, PSA, Fiat / Chrysler and Kia either to gaps in NOx is for CO2 deviations.