Re: [SystemSafety] The VW Saga

From: Bernd Sieker < >
Date: Sat, 10 Oct 2015 11:39:43 +0200


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On 10.10.2015 11:35, Peter Bernard Ladkin wrote:
> http://www.theguardian.com/business/2015/oct/09/vw-scandal-3-6m-european-vehicles-need-major-changes
>
> This raises possibly more issues than it clarifies.
>
> The situation is that, in order to conform with regulations on NOx
> emissions, unsustainable amounts of AdBlue were injected into the
> burn mixture during formal tests. Without this, the NOx emissions
> were substantially more than the amount allowed by regulations.

I haven't read all of it yet, but my understanding is that the current scandal is about the smaller Diesel engines which VW claimed could fulfill the strict NOx emission regulations *without* AdBlue. And they sort of could, in a low-power, high fuel-consumption regime, which was activated when a dyno test was detected.

What the cited article implies is that the only way to fix these engines may be to add an AdBlue (urea) injection system.

Bernd
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systemsafety_at_xxxxxx Received on Sat Oct 10 2015 - 11:40:02 CEST

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