Reply to post: Re: Has anyone got any real details?

NOxious Volkswagen diesel emissions scandal: Chief falls on sword

Nigel 11

Re: Has anyone got any real details?


The point is that VW diesels don't use urea to clean up the exhaust. VW claimed that their technology was so advanced, urea injection was unnecessary. But they were cheating the tests. The ECU was injecting fuel in a special test programme, that will severely impact on the cars' performance if it is now inflicted on motorists who bought VW cars based on a test drive experience. Also, it's not a minor discrepancy. In the US, VW diesels were discovered to be emitting seven times more pollution on the road, than they did in the tests. That's illegal, by a factor of at least five.

If other manufacturers are cheating but only by not injecting Urea as much as they do when they detect a test situation, it'll be less serious for them. They'll have to turn on "test mode" for ordinary motoring and supply free urea to motorists. Possibly, they'll have to retro-fit a larger tank, if the supplied one holds less than a ~500 mile supply. Luckily, urea is cheap (and about as non-toxic as a chemical can be). OTOH if test mode cripples on-road performance for other manufacturers' cars, this will become the biggest scandal since the bankers almost crashed the entire global economy.

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