The road tests made by the ad hoc committee of the Ministry of the Environment show that emissions of most Euro 6 cars are five to ten times higher than the regulatory threshold.
in real conditions, the car emissions exceed the regulatory levels checked during certification tests on test bench . The problem is well known, but the Ministry of the Environment has provided new details Thursday, April 6 by publishing the first results of the French road tests. For Euro 6, overtaking full threshold for nitrogen oxides (NOx) are systematic and widespread, we learn from measurements made by the Commission ad hoc . A finding that “causes coughing” France Nature Environnement (FNE).
As a reminder, following the “dieselgate”, the Ministry of Environment established an independent technical committee control of vehicle emissions on measuring emissions of 100 vehicles. It brings together parliamentarians, consumer associations, environmental NGOs, services of the Ministries of Environment, Industry and Economics, as well as various organizations and specialized public institutions. The tests relate especially to NOx emissions from diesel vehicles 100 randomly chosen on the French automotive market and representative market share of manufacturers. Moreover, the commission holds hearings manufacturers.
three separate tests The committee passed three tests on vehicles.
The first (D1 test) retains the test bench cycle used for the certification, but modifies the cover position, adds the mobility of non-drive wheels rotate and incorporates the passage of the reverse. These changes can detect the defeat devices that activate vehicle pollution control functions when they detect that they are being tested.
The second test (D2) amend the beginning of the test bench cycle and takes the extra-urban part of the cycle. Again, the goal is to detect the possible presence of fakers devices.
Finally, the track tests (D3) reproduce the approval cycle on a road with a camera equipped with an airborne vehicle which directly measure its emissions.
The Euro 6 vehicles far exceed the standard for NOx
the first assessment made by the Ministry of the Environment regarding the testing of the first 52 vehicles fifteen different brands including twelve Renault, New Peugeot, Citroën six and five Volkswagen.
the most disturbing findings concern ramp on tests (D3). For this test, the stress was widely loosened since emissions are classified as abnormal when they exceed that of more than five times the emissions of the standard. Despite this easing, “The results show that a majority of Euro 6 vehicles tested exceed by more than five times their emission limit (80 mg / km), some well beyond” . Specifically, thirteen vehicles on display 23 x emissions over five times higher than the regulatory threshold and four of them reach or exceed a level ten times higher. As for Euro 5 vehicles “some” show overruns. In this case, eight exceed five times the regulatory threshold.
In terms of technology, Euro 6 vehicles exceeding the emission standard under the NOx in the test road are those combining the recirculation exhaust gas recirculation (EGR) and a continuous treatment of NOx (SCR). Ten vehicles tested, four qualified overruns appear abnormal by the ministry. The addition of a NOx capture and storage (NOx Trap) is more efficient since no vehicle tested displays of increase of more than five times the emission standard. However, for now, only two vehicles with triple this device were tested.
Up to three times the regulatory threshold test bench
the tests on test bench are less bad, although significant exceedance for some vehicles. The ministry says that twelve vehicles (mainly Euro 6) exceed by more than 10% standards permitted when D1 test, the nearest test conditions of registration. However, this test still shows significant emissions: three vehicles emit more than 200 mg of NOx per km (for a regulatory threshold of 80 mg / km), one of the three sending about 300 mg / km or more three times the standard. “The relevant manufacturers were invited to provide explanations on the causes of these over to members of the independent commission” , the ministry said.
As for the D2 test, which amends the urban cycle the official test, fourteen vehicles tested achieved deemed abnormal, that is to say whose ratio between D1 and D2 tests exceeds a factor of 1.5. Among them, “two models of the Volkswagen group far exceed the standard acceptable” . Another brand, unnamed, displays results as bad, since the results presented by the Ministry emphasize that the results of three vehicles show a relationship between D1 and D2 test than a factor of 3. Again, manufacturers will provide explanations to the commission.
are these overruns intentional?
These results are ‘ totally unacceptable “ says FNE. The summary of the association, which participates in the commission, is clear: the results of the tests show NOx emission levels of “between two times [the regulatory value] for the least worst and ten times for bad students “. The NGOs point in particular that Renault announced it could reduce pollution of its cars without affecting engine performance and without overconsumption. “It’s really wonder why they have not done so far? Are Overtaking intentional, were they orchestrated?” asks the federation, which calls for further investigations “to explain unambiguously why pollution control systems are deficient in normal operating mode” .
in addition, the ministry plans to give legal actions ” appropriate “ to recorded overruns. Now, FNE claiming he grasps justice.
Article published April 8, 2016
No comments:
Post a Comment