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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.

Volkswagen Tiguan tunes up for Frankfurt show

Volkswagen is in the phase of testing where it's simply beating the crap out of the next-generation Tiguan. The German manufacturer is conducting high-altitude towing tests in the Alps of mules wearing the production-ready body of its second-gen compact CUV. This is the first time we've seen the Tiguan in its production body, and despite the ample camouflage, the resemblance to not only the Passat sedan, but the Cross Coupe GTE and CrossBlue concepts, is clear. That's particularly true based on what we can see of the new Tiguan's grille and headlight treatment. In back, the Tiguan will adopt a more sporting roofline, particularly in the aggressive rake of the D-pillar. It's significantly different than the current car, and frankly, that's no bad thing. Expect the usual array of gas and diesel four cylinders with both front- and all-wheel drive on offer. On the high end, meanwhile, our spies claim a 300-horsepower R model could eventually be added to the range. Aside from its new look, future variants could see the crossover spawn both a long-wheelbase version and a coupe-like model. That said, we're wondering how a long-wheelbase Tiguan would fit into the VW range alongside the long-rumored, American-built, three-rower. According to our spies, though, neither one of those vehicles would arrive until well after the vehicle shown above debuts. As for when we can expect to see the second-gen Tiguan, our spies point to September's Frankfurt Motor Show. Be sure to check back then.

Volkswagen rules out Eos successor

When Volkswagen introduced the Eos back in 2006, hard-top convertibles were all the rage – in North America, in Europe and around the world. But the trend, billed at the time as the best of both worlds, has long since subsided, leading to VW axing the Eos several months ago. And don't count on it getting a successor at some point down the line, either. At the Detroit Auto Show earlier this week, VW R&D chief Heinz-Jakob Neusser told Autocar that the Eos is down for the count. In fact it is "maybe the first model we take out of the market" in a reversal of the momentum that has seen the German automaker expand its lineup incrementally over the past several years – although the Chrysler-built Routan minivan was also canceled around the same time. The place the Eos occupied in VW's North American lineup is largely being taken by the more charismatic Beetle Convertible, and in Europe and other markets by the Golf Cabriolet that's still based on the previous-generation hatchback. The Eos, however, isn't the only hard-top convertible withdrawn from the market in recent years. Tin-top cabrios like the Lexus IS and SC, Cadillac XLR, Chrysler 200, Pontiac G6 and Volvo C70 have all gone the way of the dodo – as have Euro-market coupe-convertibles versions of models like the Ford Focus, Opel Astra, and Peugeot 207. The arrival of the Buick Cascada just goes to show that soft-roofed convertibles have won out, particularly as far as four-seat cabrios are concerned. The one notable exception where folding hard-tops are still gaining traction is among mid-engined exotic supercars like the Ferrari 458 and McLaren 650S, both of which opted for solid folding roofs instead of fabric ones. We've yet to see, however, which approach Lamborghini will take with the Huracan Spyder or Audi will with the next-generation R8, the predecessors of both of which featured fabric roofs.