Audi, Porsche, Mercedes, Volkswagen and Opel is now preparing a mass recall of a total of 630,000 cars in Germany, said N-TV.
This information will from a representative of the German government. So far it is unclear which models and model year covered, and some Swedish car owners suffer.
The problem is in the software for emission control in diesel cars. There is a gap in the law that makes car manufacturers can allow emissions to increase at certain temperatures, causing the emission control only works best at the temperature used for emission tests.
The recall is being done to ensure that car manufacturers do not use the door, writes Reuters. The emission purification function only at certain temperatures, according to the automobile manufacturers to reduce the load on some engine components.
Another possible reason to “remove” emission control is to reduce the consumption of AdBlue, the liquid ammonia into the exhaust gases and the catalyst helps to convert NOx, various nitrogen oxides. The small tank for AdBlue is often designed to last between two service opportunities, to reduce the inconvenience for car owners to buy and replenish the liquid.
In order to consume as little AdBlue as possible, the car manufacturer can reprogram the engine control to activate only treatment when absolutely necessary (as at temperatures as a gas test is done). You can also remove the AdBlue purification at high speeds, as the exhaust emissions are only measured at a maximum of 130 km / h for a few seconds.
The auto motor & amp; sports winter testing has shown that several cars had been many times higher emissions in cold weather. Volkswagen Passat emitted 83 times more nitrogen oxides than the limit allows. When it comes to particle emissions had Corsa the highest values we have ever measured.
Opel has denied allegations of exhaust cheating, similar to that found in the Volkswagen.
Mercedes C-Class let out 40 times more nitrogen oxides than are allowed in a Dutch test, since the exhaust recirculation works in a different way at low temperatures than at high.
Mercedes now cooperating with the DOJ to show how emissions testing works.
Earlier this week came the news that Volkswagen is planning to buy back half a million cars US.
This article is updated. We are looking for representatives for the Swedish dealerships to see if the recall also becomes relevant in Sweden.
Exhaust Testing is done in the lab and diesel engines are no ” cold start “(it is included in the test for petrol engines). This means that the exhaust purification optimized for room temperature, what happens at such lower temperatures is not included in the emissions certification.
I think it is important that the exhaust purification works regardless of outside temperature.
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