Heck yes they knew what they were doing. I'm just curious how it came to light. I haven't seen anything to that affect.
Ha! The article I read said it was some advocacy group or institution (can't remember the name) that borrowed test equipment from West Virginia University to independently test vehicles. Basically they were going to prove how well the TDI diesel model was! Yes, that right, they were looking to help the diesel industry! When they started to test tailpipe emissions they found discrepancies between the "published" EPA tests and what they were finding. Apparently the EPA tests differently than what this group was doing.
Edit: Found the quote:
"Bloomberg has a good recap of how this went down: A relatively small clean-air NGO, the International Council on Clean Transportation, noticed discrepancies between tests of diesel Volkswagens in Europe, so last year they borrowed equipment from West Virginia University to test the cars’ actual emissions in real-world driving in the U.S.
Rather than trying to cast doubts on Volkswagen, they’d hoped to prove that small diesels like the cars VW made could run cleanly. As they told Bloomberg:
“We had no cause for suspicion,” German, U.S. co-lead of the International Council on Clean Transportation, said in an interview. “We thought the vehicles would be clean.”
While the VWs passed the lab tests performed by the California Air Resources Board, they failed the real-world tests, which measured tailpipe emissions.
Bloomberg reports VW engineers struggled to explain these results to the EPA and CARB after an investigation began. Regulators weren’t satisfied with that explanation, so they threatened to withhold certifications and effectively halt sales.
Only then did VW concede the cars had a cheat device. The EPA didn’t know about this before because they depend on automakers to self-certify their cars.
What was this about a recall last year?
During the course of the EPA and CARB investigations, VW agreed to a voluntary recall of nearly 500,000 TDI cars last December to implement a software patch they claimed would fix the issue. CARB reports that while this patch did reduce emissions somewhat, nitrogen oxides were still “significantly higher than expected.” Which brings us to our next point...
What pollutants are we talking about?
Specifically, nitrogen oxides, or NOx. They contribute to smog, particulate matter and a wide range of health problems for certain people, which is why they’re so heavily regulated in emissions. Via the EPA:
NOx pollution contributes to nitrogen dioxide, ground-level ozone, and fine particulate matter. Exposure to these pollutants has been linked with a range of serious health effects, including increased asthma attacks and other respiratory illnesses that can be serious enough to send people to the hospital. Exposure to ozone and particulate matter have also been associated with premature death due to respiratory-related or cardiovascular-related effects. Children, the elderly, and people with pre-existing respiratory disease are particularly at risk for health effects of these pollutants.
I thought these were good cars, what happened?
They are good cars, actually. The TDI cars have long been gems in the VW and Audi lineups. They provide good power, great fuel economy and loads of torque that happen to make them pretty fun to drive. I was thoroughly impressed by the 2015 Golf SportWagen TDI I tested earlier this year.
They’re just not as clean as they were billed, and now they represent a bunch of huge, costly headaches for VW. Also, you can’t even buy one right now, so whether it’s good in other ways doesn’t really matter."