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Porsche says it found 'irregular' software as Germany recalls diesel Cayenne

BERLIN - German Transport Minister Alexander Dobrindt on Thursday announced a recall of Porsche Cayenne models equipped with 3-liter diesel engines after finding potentially illegal emissions controlling software in the vehicles. Dobrindt told reporters he was withdrawing certification for the vehicles, which will need to undergo a software update to regain legal status. Sports car maker Porsche AG is owned by Volkswagen, which in 2015 admitted to systematic manipulation of engine management software to cheat emissions tests. Porsche on Thursday said it had discovered "irregular" engine management software during an internal probe into emissions. Porsche also said it had agreed to recall the vehicles to fix the problem. "The producer will of course bear 100 percent of the costs," Dobrindt said. "There is no explanation why this software was in this vehicle." The minister said: "We have examined Porsche Cayenne vehicles of the 3 liter TDI Euro 6 Mark - during tests these vehicles deploy a so-called defense strategy, which isn't activated in real traffic." "In our view that is a kind of test recognition, which we regard as an impermissible deactivation strategy." "Even if there is a modern exhaust gas cleaning system in these vehicles, if this software is nonetheless there it is illegal, does not meet the legal requirements and needs to be removed," Dobrindt said. He also said that Porsche would quickly be in a position to bring the software into conformity with the law. Dobrindt also said there were some 7,500 vehicles of this type certified in Germany and some 22,000 certified in Europe. "We don't know how many are with dealers. These are the cars that fall under the certification ban." The Porsche Cayenne model shares components with a sister model, the Volkswagen Touareg. Asked about Volkswagen's Touareg model, Dobrindt said: "On the technical question, it is assumed that this vehicle has a similar parameter set but identical construction does not mean that the same software was used in it but it is assumed that the same software was used." He said the Transport Ministry was, however, checking that and a hearing with Volkswagen would show whether that was the case or not, adding: "The probability is high." Volkswagen CFO Frank Witter had no immediate comment about the Porsche recall on a VW earnings call also held on Thursday.

VW decides against active-cooling system for e-Golf lithium battery

When the 2015 VW e-Golf was introduced at the LA Auto Show last year, VW said it would come with a water-cooled battery. During the Detroit Auto Show, when the car was trotted out again, VW released a new press release that stripped out the "water-cooled" language, but this change went unnoticed. During a recent VW event in Germany, a friend from Green Car Reports realized that the battery on display did not seem to have any water-cooling mechanisms. That set us off on a bit of a sleuthing and we have now learned that VW is not going to include any active cooling in the upcoming e-Golf. In fact, the company is entirely confident that this car - because of what it's designed to do - doesn't need it. "The need for a cooling system wasn't there" - VW's Darryll Harrison VW has been working on an electrified Golf for ages now, and so changes to the plan are to be expected. But battery cooling is vitally important not just to keep the car operating properly but because when things get too hot, there can be serious public relations problems. Nissan began testing a new battery chemistry for the Leaf in 2013 after an uproar from warm-weather EV drivers in Arizona who were experiencing worse-than-expected battery performance. The Leaf has always used an air-cooled battery, which is another way to say that there is no active cooling system (more details here). Tesla CEO Elon Musk once said this approach is "primitive." So, why is VW following the same path? We asked Darryll Harrison, VW US's manager of brand public relations west, for more information, and he told AutoblogGreen that VW engineers discovered through a lot of testing of the Golf Mk6 EV prototypes, that battery performance was not impacted by temperatures when using the right battery chemistry. That chemistry, it turns out, is lithium nickel manganese cobalt oxide (NMC) in cells from Panasonic. These cells had "the lowest self-warming tendency and the lowest memory effect of all cells tested," Harrison said. He added that VW engineers tested the NMC cells in places like Death Valley and Arizona and found they didn't warm very quickly either through operation, charging (including during fast charging) or through high ambient temps. "The need for a cooling system wasn't there," Harrison said.

The tumultuous history of the diesel engine

Volkswagen, diesel's most enthusiastic patron, deceived everyone about the amount of emissions its cars were putting out. We have covered this latest massive automotive scandal in great detail, and there are surely more fascinating revelations to come. It turns out that this is just the latest episode in the epic story of the controversy and intrigue surrounding the diesel engine, and its inventor. This is the story of the tumultuous birth and interesting evolution of the compression-ignition engine at the center of the VW scandal. Napoleon III Got Rudolf Diesel Deported Rudolf Diesel was born in Paris in 1858. His Bavarian parents had settled in France where his father, Theodor, was a leather goods manufacturer. When the French Parliament declared war on Prussia, kicking off the Franco-Prussian war, the Diesels fled to London. When he was 12, Rudolf went to live with his aunt and uncle in the Bavarian university town of Augsburg. It was his parents' hometown, and importantly, it's where Rudolf began studying at the Royal County Trade School. His time in Augsburg, graduating at the top of his class from trade school that laid the groundwork for all that was to come. Diesel Nearly Blew Himself Up An early career in refrigeration saw Diesel running R&D in Berlin for Linde, a company started by refrigeration pioneer Carl Von Linde, one of Diesel's professors. His ambition to branch out beyond refrigeration, and his deep understanding of thermodynamics, led to efficiency experiments with steam engines. Diesel was trying to create an engine that didn't waste heat from the combustion process, therefore getting the most work out of the fuel. Instead, he was nearly killed when an experimental ammonia vapor steam engine exploded. Recovery took many months, and during some of that time, he was no doubt planning his next experimental engine, based on the theoretical Carnot cycle. His Engine Was An Attempt To Stick It To The Man Steam engines were expensive to run and wasteful. Diesel thought the efficiency of his design would be a way for the small business to compete with the dominant industrial giants. It was, and it did, but big business is equally passionate about chasing efficiency. Diesel engines quickly proliferated in industries both grand and cottage. Rudolf Didn't Really Invent The Diesel As We Know It Instead, he improved an existing one to a significant degree. The Diesel engine could be considered an evolution of the "hot-bulb" engine.