#nox

Porsche will quit offering diesel powertrains for its cars and light trucks, effectively adding another nail to the fuel’s coffin. Following Volkswagen Group’s emission’s fiasco in the United States, which included Porsche, Europe has become increasingly critical of diesel-engined vehicles. Citywide bans have have been proposed throughout the region and, as of February, Porsche suspended diesel sales due to an ongoing German probe into VW Group’s diesel engines.

That investigation found that the Cayenne EU5 model’s 8-cylinder diesel was in violation of the established rules, affecting 13,500 units, according to Bild am Sonntag. Porsche then recalled nearly 60,000 Cayenne and Macan diesels in May as it launched its own investigation.

“Porsche is not demonizing diesel. It is, and will remain, an important propulsion technology,” Porsche Chief Executive Oliver Blume said in a statement. “We as a sports car manufacturer, however, for whom diesel has always played a secondary role, have come to the conclusion that we would like our future to be diesel-free.”

Bosch says its engineers have developed a new diesel exhaust system that could lower emissions to a point where governments no longer have to worry about banning the fuel.

It’s not a defeat device.

If you’ll recall, Robert Bosch GmbH found itself caught up in Volkswagen Groups emissions scandal. Owners of affected cars accused the company of helping develop the illegal software that allowed the vehicles to fool environmental regulators. Bosch launched an internal probe as a sign of good faith and has not officially been charged with any wrongdoing by federal authorities.

That’s good news for the company, because any attempt to promote diesel-friendly equipment would have been overshadowed by a preexisting scandal — especially something as miraculous-sounding as this.

After four years of consecutive growth, the United Kingdom’s automotive market has tanked for 12 months straight. The culprit is, of course, dwindling diesel sales.

Thanks to European governments latching onto the fuel as the cleaner alternative to “petrol” throughout the 1990s (subsequently incentivizing the fuel as a way to meet aggressive CO2-reduction targets), diesel-powered autos accounted for roughly half of all new auto sales between 2009 and 2017 . But diesel is now “evil” and everyone in Europe has started avoiding it.

In March, diesel sales declined by 37.2 percent — leaving the once dominant fuel with just 32 percent of the new car market. Unsurprising, as the new trend in Europe is the widespread (future) banning of the fuel in city centers. April’s sales are expected to be even lower, as the British government’s new taxes on diesel vehicles come into effect. Those fees and a weakened pound, which practically everyone has attributed to Brexit, forced new car sales in the UK down by 16 percent.

U.S. investigators have found what could be illegal software modifications on Mercedes-Benz diesels intended to help the vehicles pass emissions testing. An engine management function called Slipguard recognized whether the car was undergoing testing procedures while another, called Bit 15, halted emissions cleaning after roughly 16 miles of driving. Together, the two pieces of software may amount to what is known within the industry as a “defeat device.”

When paired the software apparently enabled the cars to produce NOx levels up to 10 times higher than what is legally permitted. Interestingly, Mercedes-Benz issued a voluntary recall upon roughly 3 million European cars last month to reduce nitrogen oxide emissions by tweaking their electronic control units.

Audi CEO Rupert Stadler has announced his company will dismantle the task force assigned to investigate how many of its diesel cars came equipped with defeat devices. The company established the team after Volkswagen Group admitted to selling 11 million diesel models, through its various brands, with illegal engine management software that hid peak NOx emissions during testing.

Even though Volkswagen has found itself smack-dab in the center of another costly controversy, Stadler claims that Audi is on the cusp of wrapping up its own diesel crisis. “We will have documented and processed all the engine/transmission combinations by the end of the first quarter 2018,” the CEO told journalists at Audi’s headquarters in Ingolstadt, Germany, this week.

Diesel-powered passenger vehicle sales have fallen in Europe. Data from the European Automobile Manufacturers Association (ACEA) showed diesel’s year-over-year market share plummeting in the first half of 2017, sinking from 50.2 percent to 46.3 percent of all new car registrations in the EU.

Helped by negative publicity and governmental intervention, it’s the first time diesels have dipped below the 50 percent mark since 2009. ACEA’s figures indicate 152,323 fewer diesel cars sold so far in 2017, attributing some of the decline to a renewed interest in gasoline-powered vehicles. Of course, if you aren’t buying diesel, you don’t have a lot of other options.

Still, deliveries of “alternative” vehicles — which include hybrid, electric, and natural gas-powered automobiles — also rose by more than 35 percent. Those categories now account for 5.2 percent of Europe’s total auto sales.

With Volkswagen’s emission crisis winding down (but seemingly never over), Daimler AG is taking center stage as the next automaker to potentially face serious hardship for dastardly diesel misdeeds. For the last few months, investigators from the United States and Germany have begun suspecting that Mercedes-Benz equipped its vehicles with defeat devices similar to those used by VW. While no evidence of fraud has surfaced, there’s reason to believe Daimler may have violated emission standards — especially now that it has decided to recall 3 million late-model diesels.

“The public debate about diesel engines is creating uncertainty,” Daimler CEO Dieter Zetsche said in a statement on Tuesday. “We have therefore decided on additional measures to reassure drivers of diesel cars and to strengthen confidence in diesel technology.”

Suing automakers over diesel emissions violations is quickly on its way to becoming passé.

Since Volkswagen admitted to installing software that circumvented pollution laws, regulators have been on the hunt for their next big target. While it might make their efforts seem like a bit of a witch hunt, there’s good reason to be on the lookout. Studies have shown diesel emission levels are often much higher than analysts expected, with experts attributing the results to the high probability that other automakers are skirting regulatory guidelines — likely by way of defeat devices.

Daimler, Renault, and PSA Group are all being investigated in their home countries as FCA faces legal action within the United States.

General Motors is now being sued for allegedly installing defeat devices in its trucks to sidestep emissions tests, making it the sixth major manufacturer accused of diesel cheating since 2015. However, General Motors isn’t dabbling in gray areas, acting confused, or assuring the public it will get to the bottom of the accusations. It says the claims against it are flat out wrong.

Update: I made a decimal flub. The math is corrected. Thanks to commenter ChemEng for pointing it out. We’ll post a new piece on Monday.

There’s no denying it: Volkswagen cheated. It confessed to the crime of emitting up to 40 times over the legal limit allowed for NOx. We learned yesterday (and the day before, to some degree), that Volkswagen will fix the vehicles that can be fixed, if owners so choose.

But what happens to all those diesel cars, which are perfectly good aside from emitting more NOx than they should, if owners decide to cut and run? And what happens to all those vehicles that can’t be fixed? Volkswagen has vowed to buy them back from customers — to which I ask, what then?

There are few options Volkswagen can employ to unload the massive windfall of cars coming its way, and none of them are particularly environmentally friendly.

Well, ladies and gentlemen, it has officially emerged that Volkswagen has been lying to the general public like one of those guys who approaches you at a gas station and says his car has broken down and he just needs three more dollars for a bus fare.

This is surprising. Anyone who ever owned a Volkswagen knew that they were a bit sleazy, in the sense that they told you they offered “solid German engineering” when what they really offered was a bunch of untested parts farmed out to the lowest bidder. But we never really expected them to be overtly lying about stuff. Especially stuff as important as emissions results.

Or at least, I say “important,” but then I stop and think about it for a second, and I wonder: How important really are emissions numbers?

Volkswagen may not be the only one that was cheating on their emissions testing. Reports coming out of the European Federation for Transport and Environment are shining light on other manufacturers which could be putting out dodgy emissions figures. I found the Vauxhall Zafira Tourer on one such report and decided to take a look at the Chevy Cruze Diesel due to related engine technology. I was surprised by what I found.