In the light of the VW diesel scandal in the USA, I had some thoughts about diesel tuning. I think that it may not be easy to get the power, performance and economy combination that is wanted AND get the vehicle to comply with the pollution regulations. We or at least I and some right minded people do want pollution reduced and leave a better world for our kids and others. At least VW has not been able to do it with their engines that are involved. 11 million world wide at last count Are there other manufacturers too ?
So what can we deduce from this. Is it likely that some small scale chip modifier in Aus can get the R & D done to do it better than the manufacturer and glibly say it complies with the required pollution standards. Or is it that some people do not care about this side of it? The pollution regs are just for dummies and who cares
But isn't the VW problem that the emission controls were circumvented except while under test? Chipping with and altering ECU programmes doesn't mean that's also what they are doing. It's more about remapping fuel programming to deliver fuel more efficiently for maximum power and economy.
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Yes I am an agent of Satan, but my duties are largely ceremonial.
As strange as it may seem .. It's more about beating / breaking US EPA law than emissions that'll get them ...
They WILL be made examples of going by previous EPA findings ..
As strange as it may seem .. It's more about beating / breaking US EPA law than emissions that'll get them ... They WILL be made examples of going by previous EPA findings ..
Yes, but that's not really what the topic is about is it?
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Yes I am an agent of Satan, but my duties are largely ceremonial.
But isn't the VW problem that the emission controls were circumvented except while under test? Chipping with and altering ECU programmes doesn't mean that's also what they are doing. It's more about remapping fuel programming to deliver fuel more efficiently for maximum power and economy.
Hi
As far as I can read there are no emission controls on these VW engines. Perhaps some EGR. The emissions of NOX are controlled by the mapping of the fuel timing and quantity that is adjusted to give less emissions or more power and economy. Hence the need to sense that a test is being done so the mapping can be adjusted.
That mapping adjustment is just what the aftermarket chippers do here to your diesel. My point being that it probably affects the pollution out put of the 4WD engines that are modified even though it is claimed it does not
yes, maybe. But all the reports I read say "switched emission controls off". the aftermarket chipping may or may not cause more pollutants, but is there any law to say you can't remap fuel timing control?
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Yes I am an agent of Satan, but my duties are largely ceremonial.
From my limited knowledge of this incident it seems that all VW did was modify software to comply to get approval, and then to not comply when in the market place ie in service testing is quite different from initial testing when engine is introduced to USA market.
May be wrong again!
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Why is it so? Professor Julius Sumner Miller, a profound influence on my life, who explained science to us on TV in the 60's.
Yep .. My guess as said they limited or isolated the EGR. Fine tuning can co either way EPA wise.. Our emissions are not as tight as Euro's new Exhaust NOS stds .. I often wandered how some Euro engines got away with cleaning partical filter like Isuzu' Fuso have to..
Most tweaking is adding more boost.. Which doesn't necessary mean higher emissions ... Btw BMW are suspect of the same ..
-- Edited by Aus-Kiwi on Friday 25th of September 2015 07:28:40 PM
From my limited knowledge of this incident it seems that all VW did was modify software to comply to get approval, and then to not comply when in the market place ie in service testing is quite different from initial testing when engine is introduced to USA market.
May be wrong again!
Yes, but how was the software modified? what were the effects of modifying it? ie what was changed from the normal running system? is what the topic is about.
__________________
Yes I am an agent of Satan, but my duties are largely ceremonial.
From my limited knowledge of this incident it seems that all VW did was modify software to comply to get approval, and then to not comply when in the market place ie in service testing is quite different from initial testing when engine is introduced to USA market.
May be wrong again!
Yes, but how was the software modified? what were the effects of modifying it? ie what was changed from the normal running system? is what the topic is about.
EGR .. I suspect ? I lets inert gases back into combustion chamber, controlling heat . Longer term it tends to block up with soot .. Burning Pistons .. As what happens to late model Jap motors .. Especially Nissan..
From my limited knowledge of this incident it seems that all VW did was modify software to comply to get approval, and then to not comply when in the market place ie in service testing is quite different from initial testing when engine is introduced to USA market.
May be wrong again!
Yes, but how was the software modified? what were the effects of modifying it? ie what was changed from the normal running system? is what the topic is about.
Bob
From one of the original reports (and from experience they are often the best for info before PR / legal guys take over) it stated that the said software recognised the difference between being "mobile on the road" and being run stationary in a scenario that resembled being "tested or used" for other than normal use.
It would not be hard to incorporate this in software ie GPS/motion sensor/forward infra red/anti collision system to name a few common ones.
I learnt years ago to trust some of the first news reports before they have time to be manipulated and cleaned for public consumption.
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Why is it so? Professor Julius Sumner Miller, a profound influence on my life, who explained science to us on TV in the 60's.
From my limited knowledge of this incident it seems that all VW did was modify software to comply to get approval, and then to not comply when in the market place ie in service testing is quite different from initial testing when engine is introduced to USA market.
May be wrong again!
Yes, but how was the software modified? what were the effects of modifying it? ie what was changed from the normal running system? is what the topic is about.
Bob
From one of the original reports (and from experience they are often the best for info before PR / legal guys take over) it stated that the said software recognised the difference between being "mobile on the road" and being run stationary in a scenario that resembled being "tested or used" for other than normal use.
It would not be hard to incorporate this in software ie GPS/motion sensor/forward infra red/anti collision system to name a few common ones.
I learnt years ago to trust some of the first news reports before they have time to be manipulated and cleaned for public consumption.
Yes Baz, but that only tells you when the software modified the anti emissions controls, not how it modified them. There's nothing very technical about detecting whether the system is under test or not.
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Yes I am an agent of Satan, but my duties are largely ceremonial.
Are there other manufacturers too ?
Or is it that some people do not care about this side of it? The pollution regs are just for dummies and who cares 
