Audi announces the revision of its 3.0 TDI V6 in the united States. What had trick in their broadcasts?

a couple of weeks Ago I we set out the possibility of the Volkswagen Group, and more specifically its brands Audi, Porsche, and Volkswagen, would have incurred in a new fraud related to the certification of NOx emissions. The , EPA, the environmental agency u.s., accusing it back to Volkswagen to have tampered with their emissions with an unauthorized device. The big difference, in this case, with what happened after you uncover the scandal of the TDI four-cylinder engine, was that Volkswagen denied the accusations from then on the 3.0 TDI V6. Be that as it may, there will be a review of engines. What explanation has been given to Audi about it?

Audi has been the brand that has advanced a first explanation of these accusations. According to the brand of the four rings, systems anti-pollution that the , EPA has challenged would not have engaged in an illegality, but in a behavior that in their analysis, the authorities have not understood. Audi insists in the defense of the technology used by its engines.

Of time, the only irregularity is recognized by the Ingolstadt would be a defect of form, the lack of specificity of the functioning of these systems in their application for approval to the united States. In any case, Audi has not only announced that it will be detailed the operation of these systems to the authorities, so that they may resume sales of 3.0 TDI V6 in the united States, but also that they will carry out a review of the software, for which it is expected a total cost in the tens of millions of euros.


  • The three systems that did jump the alarms of the , EPA, and that Audi would not have explained with detail, are the following:

    • The first is a system that is in charge of the thermal management in the conditioning of the system of treatment of exhaust gases. The systems of catalysing NOx work best in ideal conditions, which require a certain temperature. Audi would have designed a technique so that the operating temperature of the catalyst was reached before, attenuating in this situation the NOx emissions. Regardless of whether this technique helps to achieve a better approval of emissions, its use seems to be that in any case it also helps to reduce emissions in all conditions, especially on cold starts.
    • The other two systems, suspects were given a to avoid that residues of the combustion may impede the proper functioning of the valve of AdBlue. That is to say, would be in charge of its regeneration.
    • According to Audi, these systems – and especially the charge of the thermal management system of reduction of NOx – would have been regarded as a defeat device, a device designed to circumvent the type-approval of emissions, reaching a different yield in terms of approval and in real life.

    The call to review will, for now, only in the united States and will affect the Volkswagen Touareg and Porsche Cayenne since MY 2013; and the Audi A6, A7, A8, Q5 and Q7 from the MY 2009; equipped obviously with the 3.0 V6 TDI.

    In Europe, meanwhile, does not appear to be a call to review.

    Source: Audi
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