VWs using more diesel, failing pollution tests after recalls: study

March 12, 2018
VW admitted in 2015 to equipping about 11 million cars worldwide with defect devices

Volkswagen vehicles recalled and fixed after the worldwide "dieselgate" emissions cheating scandal are using more fuel and still failing pollution tests, according to a study by Australia's peak motoring body released Monday.

VW admitted in 2015 to equipping about 11 million cars worldwide with "defeat devices", which allowed them to deceive emissions laboratory tests but emit up to 40 times the permissible levels of harmful nitrogen oxide during actual driving.

The tainted cars were recalled by VW, but the Australian Automobile Association (AAA) said tests it commissioned on local vehicles before and after being updated showed they were still exceeding regulations in real-world settings.

"Emissions analysis... found an affected VW diesel to be using up to 14 percent more diesel after recall, and still emitting noxious emissions more than 400 per cent higher than levels observed in laboratory testing," the AAA said in a statement.

The emissions were lower than before the fix, but higher than the limits allowed in Australia, added the AAA, which conducted the tests in partnership with motorsports' governing body Federation Internationale de l'Automobile (FIA).

Volkswagen on Monday rejected the comparison and said Germany's KBA motor vehicle authority had approved its software update, and the fixed vehicles "continue to satisfy European and Australian emissions standards".

A spokesman said in a statement to AFP that automobile organisations in Germany, Austria and Switzerland had tested the updated vehicles and also found they "continue to perform as expected".

The AAA said the results showed that actual driving tests, rather than those carried out in lab settings, would allow policymakers to ensure regulatory settings reflect real-world conditions.

Some 42,000 VWs in Australia and more than six million across the globe have been fixed, according to the German auto giant.

The scandal has so far cost Volkswagen over 25 billion euros ($31 billion) in fines, settlements and remediation, and some VW executives have been charged or jailed.

Legal proceedings brought against VW over the scandal by Australia's consumer watchdog the ACCC and a class action on behalf of motorists both began in Federal Court last week.

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antialias_physorg
5 / 5 (2) Mar 12, 2018
Volkswagen vehicles recalled and fixed after the worldwide "dieselgate" emissions cheating scandal are using more fuel and still failing pollution tests

Duh. Whoever believed that 'fixing this in software' was going to work is living in Lala-land. Software is not some magic wand that can circumvent physics with a few lines of code.
Eikka
5 / 5 (1) Mar 12, 2018
Duh. Whoever believed that 'fixing this in software' was going to work is living in Lala-land. Software is not some magic wand that can circumvent physics with a few lines of code.


Then again, "real world testing" without an established procedure can be used to come up with any result, by finding the operating conditions where the emissions control operates weakly and then riding on it.

For example, a diesel engine starts to go sooty at high loads, so one way to deliberately make it pollute and consume extra fuel is to drive it on a high gear at low speeds where the catalytic converter doesn't work well because it's not getting enough heat.

One thing they also didn't state is whether the "noxious emissions" were NOx or CH emissions, because injecting more diesel reduces NOx and increases CH by lowering combuston temperatures. Being 4 times over the limit on CH is a different standard than being 4 times over the limit on NOx.

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