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The software before the update was used to detect if a car was being tested for emissions/ fuel consumption. Then it lowered power and fuel consumption. So it

by oinkgrr 10y ago

The software before the update was used to detect if a car was being tested for emissions/ fuel consumption. Then it lowered power and fuel consumption. So it gave skewed figures. Which means in normal driving it was always giving more than advertised figures. So the fuel consumption has not changed from before update for normal driving. So you won't see any difference. Edit: ah my bad. Ah, it specifically relates to particulate emissions, that is not related to fuel consumption

icebraining 10y ago
But then how will they pass the test?
- adwf 10y ago
  It will still pass, they were just pushing the emissions tests lower so that the car could fit in a lower tax bracket. I don't know about every country, but in the UK you get taxed on how polluting your car is. I believe that various governments have made a promise not to increase the taxes on existing cars, as the consumers were unaware at the time of purchase.
  - tamana 10y ago
    Is VW paying the tax difference, or walking away with a government handout?
    - adwf 10y ago
      No it's the consumers being taxed on road vehicles every year. The lower tax makes them quite attractive in comparison to other manufacturers.
thaumasiotes 10y ago
What would be the point of getting your car fixed, assuming you're describing it accurately?
- CapitalistCartr 10y ago
  Getting owners to go in for the fix is part of the problem. Some states will most likely require it to be done before renewing the license plate, or before allowing resale, etc.
NeutronBoy 10y ago
> So the fuel consumption has not changed from before update for normal driving. So you won't see any difference. Uh, I think you've got it backwards. Won't the updates mean it drives in 'test mode' (e.g. acceptable emissions that meet the standards) all the time? Meaning that it will result in some downside (which was apparently bad enough that they cheated in the first place)
- guscost 10y ago
  Specifically, reducing NOx (without using DEF) pretty much requires the engine to burn a richer mixture. This means more fuel injected, so less fuel efficiency and more unburnt hydrocarbons clogging up the particulate filter. Without retrofitting DEF systems onto the older cars, any fix is likely to be a significant hit to efficiency and reliability. I think maybe performance would suffer too but I forget how that would work.
deleted 10y ago
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by oinkgrr 10y ago

icebraining 10y ago

But then how will they pass the test?

adwf 10y ago
It will still pass, they were just pushing the emissions tests lower so that the car could fit in a lower tax bracket. I don't know about every country, but in the UK you get taxed on how polluting your car is. I believe that various governments have made a promise not to increase the taxes on existing cars, as the consumers were unaware at the time of purchase.
- tamana 10y ago
  Is VW paying the tax difference, or walking away with a government handout?
  - adwf 10y ago
    No it's the consumers being taxed on road vehicles every year. The lower tax makes them quite attractive in comparison to other manufacturers.

thaumasiotes 10y ago

What would be the point of getting your car fixed, assuming you're describing it accurately?

CapitalistCartr 10y ago
Getting owners to go in for the fix is part of the problem. Some states will most likely require it to be done before renewing the license plate, or before allowing resale, etc.

NeutronBoy 10y ago

> So the fuel consumption has not changed from before update for normal driving. So you won't see any difference. Uh, I think you've got it backwards. Won't the updates mean it drives in 'test mode' (e.g. acceptable emissions that meet the standards) all the time? Meaning that it will result in some downside (which was apparently bad enough that they cheated in the first place)

guscost 10y ago
Specifically, reducing NOx (without using DEF) pretty much requires the engine to burn a richer mixture. This means more fuel injected, so less fuel efficiency and more unburnt hydrocarbons clogging up the particulate filter. Without retrofitting DEF systems onto the older cars, any fix is likely to be a significant hit to efficiency and reliability. I think maybe performance would suffer too but I forget how that would work.

deleted 10y ago

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