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West Virginia researcher describes how Volkswagen got caught

The cheating scandal engulfing the world's largest automaker started with a road trip. In the spring of 2014, researchers from West Virginia were evaluating the tailpipe emissions of diesel cars made for the American market by European manufacturers, something never before studied in the academic realm. Excited by the prospect of breaking new ground, the team of two professors and two students wanted to gather as much data as possible. "And being academics, we went a little overboard," said Arvind Thiruvengadam, one of the students. "Being academics, we went a little overboard." Overboard included driving the cars for more miles than they needed to test and verify results. Drivers put about 1,500 miles on each of the first two cars in the study, a Volkswagen Jetta and BMW X5, along California roadways. For their final car, a Volkswagen Passat, they wanted even more mileage. So they took the car on a road trip from Los Angeles to Seattle and back again, collecting data from more than 2,000 miles of testing. The road trip was Volkswagen's undoing. When the West Virginia team returned to Los Angeles, they were befuddled by the test results. In theory, the Passat should have spewed the lowest levels of pollutants among the three cars. Equipped with the more modern selective catalytic reduction technology, the team expected to find minimal levels of nitrogen oxide. But the car, which had been certified at a California Air Resources Board facility prior to the start of the road trip, had elevated levels of NOx that were 20 times the baseline levels established beforehand. The researchers, comprised of professors Gregory Thompson and Dan Carder and students Marc Besch and Thiruvengadam, knew their on-board equipment functioned properly because, early in their research, they had double-checked its accuracy after recording sky-high NOx readings from the Jetta that showed 30 times the level of its baseline testing at the CARB facility. It was particularly noteworthy because the Jetta contained the first-generation Lean NOx Trap technology, not the more efficient SCR, yet both produced large discrepancies. The BMW, on the other hand, performed as expected. Today, Thiruvengadam is careful to say the research team never suspected Volkswagen of cheating on emissions testing, nor did the researchers report such a finding. They merely reported their findings to CARB officials who then further investigated.

2022 Acura MDX and a trio of lovely sedans | Autoblog Podcast #662

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Road Test Editor Zac Palmer. This week, they talk about the cars they've been driving, including the 2021 Volkswagen Arteon, 2021 Kia K5 GT, 2022 Acura MDX and long-term 2021 Acura TLX. In this week's news, they talk about the possibility of a Nissan Xterra return and break down what's going on over at Lotus — the British sports car company is axing its current lineup and replacing the Elise, Exige and Evora with a new car called the Type 131. Autoblog Podcast #662 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown What we're driving:2021 Volkswagen Arteon 2021 Kia K5 GT 2022 Acura MDX 2021 Acura TLX A-Spec News Return of the Nissan Xterra nameplate? Lotus Type 131 replacing the entire Lotus lineup Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video:

Editors' Choice: Top Five 2013 Geneva Motor Show Debuts

We've returned from a very busy week in Switzerland, and in going back over all of our 75 stories from the Geneva Motor Show, our editors have gathered up their personal favorite debuts from the European expo.
The wonderful thing about the Geneva show is just how wide of an array of vehicles are on display - everything from funny little one-off EVs to the most exotic of supercars to, well, truly ridiculous displays of coachbuilding. And because of that, this list of our editors' favorites might not be as predictable as you think.
But we don't want to give anything away just yet. Scroll down to have a look at our team's favorites from Geneva.