1984 Cadillac Eldorado Biarritz Convertible on 2040-cars

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GM patent reveals new two-stage turbocharger

Modern turbochargers may be some of the best ever made, but performance is something that engineers are always trying to improve. According to GM Inside News, General Motors (GM) is hoping to alleviate some of the negative aspects of a two-stage turbocharger setup with a newly-patented design. The patent, that was filed on May 19, 2016, reveals a clever bypass system that allows the engine, a four-cylinder unit, to optimize both the low-pressure and high-pressure inlets for its respective functions. According to the filing, a conventional two-stage turbocharger setup is engineered to allow both turbines to operate simultaneously at low and mid engine speeds. At high engine speeds, only the low-pressure turbine works. The setup can't isolate either the low or high pressure side, which can impair low-end performance. GM's new two-stage turbocharger setup looks to eliminate this by linking the high-pressure turbo to the exhaust manifold through the high-pressure inlet duct. The low-pressure turbo is attached to the high-pressure turbo by a low-pressure inlet duct, which is linked to a connecting channel. A single actuator that is housed in the exhaust manifold creates a bypass that can opens the high-pressure inlet or close the connecting channel. Depending on what the engine load and speed is, the ECU guides the actuator—a single rotating spindle with discs corresponding to flanges on the high and low pressure sides—to isolate one of the two turbos. Isolating the turbos allow the respective inlets to be engineered for the best possible fluid dynamic performance. The setup should increase performance and decrease lag. There's no word on what car this setup will make an appearance on, but it will most likely be used in premium vehicles before trickling down to the rest of GM's vehicles. Related Video: News Source: GM Inside News, AutoGuide via GM Authority Cadillac Chevrolet GM Technology Sedan turbo patent engine turbocharging

GM CEO Barra says 'we are selling every truck we can build'

DETROIT — General Motors Chief Executive Mary Barra said on Monday the automaker is "selling every truck we can build" and expanding North American truck-building capacity, even as U.S. gasoline prices hit record highs. Barra made her comments during the automaker's annual shareholder meeting. GM is pursuing a two-track strategy: Investing heavily in electric vehicles for North America, China and other markets, and funding those investments by trying to maximize profits from its North American combustion pickup truck and large SUV lineups. Barra said GM is planning higher-priced versions of its Silverado large pickup and its large SUV models. GM and its Detroit rivals Ford Motor Co and Stellantis NV rely heavily on sales of large pickup trucks and SUVs for global profits. High U.S. gasoline prices in the past have undermined consumer demand for relatively inefficient models. Nominal pump prices hit an average of above $5 a gallon for the first time ever last week, the federal government said Friday. GM is ramping up production of EVs. Barra said the Cadillac Lyriq electric sport utility is sold out through 2023. In response to shareholder questions, Barra said the "clear priority" for using cash generated by its operations is to "accelerate our EV plans." She did not rule out share buybacks or other approaches to returning cash to shareholders. GM still expects to increase production this year by 25-30%, despite continuing pressure on semiconductor supplies globally. Barra said GM is working to redesign vehicles to reduce the number of processors required by 95%. Barra serves as GM's board chair and CEO. GM shareholders overwhelmingly rejected a proposal to separate those roles.

Don Draper's 1965 Cadillac Coupe de Ville up for auction

Few have ever nor ever will embody the sheer confidence and style of Don Draper, the main character on the hit AMC drama Mad Men. But if you can't quite match his style, at least you can drive his car. Now that the series has now concluded its eight-year run, the studio behind it is selling off a whole mess of artifacts from the show through ScreenBid, a specialist Hollywood memorabilia auctioneer. There's a good 1,300 lots up for grabs, from props to costumes. But the lot that's caught our attention is this 1965 Cadillac Coupe de Ville. Don picked this car up in the fifth season and drove it until the penultimate episode. These are the wheels he (spoiler alert!) drove across the country, got repaired in Oklahoma, and ultimately gave to a kid working at the motel before making his way by bus to the Bonneville Salt Flats in the final episode. At the time of writing, bidding had reached $25,000 with four days still to go. Cadillac first used the de Ville as a trim level on the Series 62 before spinning it off into its own model line. 1965 was the first year of the third-generation de Ville, stretching a massive 224 inches (over 18 and a half feet!) long. Powering over 4,600 pounds of personal American luxury was an equally massive 7.0-liter V8 that drove 340 horsepower through a three-speed automatic transmission. The name wasn't retired until 2005 when the final DeVille (as it was styled by then) was replaced by the DTS, which itself was shorthand for DeVille Touring Sedan. Cadillac produced the last DTS in 2011, finally putting to rest a name that had, in one form or another, been used since 1949. Few cars had the kind of presence that the third-gen Coupe de Ville did, though, and Draper knew it. Or at least the show's producers did.