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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

Luxury car brands scrambling to avoid a blue Christmas

DETROIT — When financial markets surge to new records, sales of luxury cars usually rise, too. Instead, October U.S. auto sales reports on Wednesday showed that a collapse in sales of luxury sedans is accelerating. Consumers have gradually shifted over to luxury sport utility vehicles from sedans in the past decade, but the trend — which has occurred in both the non-luxury and luxury sedan segments of the auto market — was particularly pronounced in October. Sales of Daimler AG's Mercedes-Benz S-Class, long a global benchmark for large, premium sedans, plunged 49 percent in October, and are down 24.8 percent for the year to date. General Motors' Cadillac brand said it sold just 779 of its CTS sedans in October. Demand for that car, designed to compete with German luxury sedans, is down nearly 33 percent for the year. "There's still a significant portion of the market that wants a car, but I'm sure there were people who preferred a horse to a car at one point." Cadillac's best-selling model this year is the XT5 compact SUV, which has more than doubled sales from a year ago. The shift within the luxury vehicle market away from sedans toward SUVs of all sizes is forcing some of the most prestigious brands to scramble to add SUV models to their lineups or boost SUV production to meet demand. "In the short term, there will be pressure to add (consumer) incentives, cut production or both," said Cox Automotive analyst Michelle Krebs. "And we just don't see an end in sight to this trend." The Dow Jones Industrial Average has been trading at all-time highs, usually a good sign for luxury sedans, but as major automakers reported new U.S. vehicle sales for October on Wednesday, sales for passenger cars continued their slide while luxury SUV and crossover sales rose again. According to Kelley Blue Book data, in 2007 luxury sedans made up 7.6 percent of U.S. new vehicle sales, while luxury SUVs made up 4.2 percent. Through September this year, luxury SUVs made up just over 7 percent of the market, compared with 4.9 percent for luxury sedans. In the short term, luxury brands could use holiday season sales promotions to clear slow-selling sedans off dealer lots, analysts said. Toyota's Lexus brand said on Wednesday it will launch its "December to Remember" year-end sales promotion for the 18th straight year.

The syrupy sweet tale of the Pink Cadillac Margarita

In our last installment of the irregular and irreverent series on drinks loosely connected to – or named after – automobiles, we sipped a Taxi cocktail, which in its original form tasted a bit like a margarita infused with Blackjack chewing gum , except worse. This time, we explore mythos behind a drink so pink it usually doesn't make you stop and think. But that's what we're going to do. And, as always, enjoy cocktails (and reading about them) while you're not behind the wheel. Our brother lives in Detroit, where old American cars go to not die. On the streets of the Motor City, you will see all manner of holey-mufflered, salt-rotted, spring-sagging Big Three iron plowing along shoddily. Our brother's next-door neighbor is a connoisseur of such vehicles, and thus populates his driveway with a cache of Malaise Era Cadillacs. (His dog lives in one.) His latest addition, which our brother texted us a photo of recently while we were eating fish tacos in Los Angeles, is a Desert Rose 1977 Coupe DeVille (seen below). Since we're always thinking about cars or drinking (or both), and we were eating Mexican, this put us in mind of a cocktail our cousin's trashy bridesmaid made us try at her wedding in Charleston: the Pink Cadillac Margarita. Suddenly, we were thirsty. The Pink Cadillac Margarita is, quite obviously, a pink drink – a somewhat cloying, if deliciously chuggable concoction colored with a spritz of Ocean Spray, or Chambord liqueur if you're classy. Pink drinks get a bum rap. Blame it on the Cosmopolitan, and everyday misogyny, but many people find pink drinks frivolous. As expert drinkers, and drink experts, we would counter that the consumption of alcohol is, at its essence, about being frivolous. Never mind that the chemical is a depressive; Consuming it is about putting on your rose (or rose) colored glasses, and getting ready to make some mistakes. The Pink Cadillac is apparently so named not just because of its signature color and the irresistible musical connection between Cadillacs and pinkness (see: Aretha, Springstein, Natalie Cole). The moniker also derives from the quality of the ingredients – drawing on the historical expression "The Cadillac of..." to signify something top-shelf. "It's difficult to know quite how that name was derived," says Melody Lee, Cadillac's director of brand strategy.