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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

Cadillac picks Publicis as new agency of record, continues cutting ties with Campbell Ewald

Cadillac is setting itself up for major changes in the coming years with its decision to hire Johan de Nysschen as the brand's new boss and moving some of the staff to new digs in the trendy SoHo neighborhood of Manhattan. With those two big shifts in place, there's one more on the way with the company's announcement that Publicis Worldwide is now its global creative agency of record, effective immediately. The firm replaces former, long-time General Motors associate Campbell-Ewald; now a portion of Lowe and Partners. "This appointment is designed to accelerate the global expansion and elevation of Cadillac into a truly global luxury brand," said Cadillac Chief Marketing Officer Uwe Ellinghaus in the company's announcement. "We have spent much of this year refocusing on the core values of our brand." Although, some work may remain at Lowe and Partners for now. According to Cadillac spokesperson David Caldwell via email to Autoblog: "The bulk of work makes this shift. It is possible that maybe a small individual smaller project or two might still be handled by Lowe. Not certain yet." The fruit of this new partnership shouldn't take long to mature, either. "We will have substantially new marketing and brand identity work in early 2015." said Caldwell. According to Ad Age, Cadillac's advertising had been handled by Lowe and Partners, Campbell-Ewald in Detroit (now entirely part of Lowe) and Hill Holiday. Caddy had a relationship with the agency since 2013 but has changed firms several times in 2006. GM had a long collaboration with Campbell-Ewald, though. Chevrolet was its partner for nearly a century until the automaker also jumped to Publicis in 2010. The firm was responsible for campaigns like, "The Heartbeat of America", "Like A Rock" and "An American Revolution." Scroll down to read Cadillac's full announcement of the change. Cadillac Appoints Publicis Worldwide 2014-12-04 DETROIT – Cadillac announced today the appointment of Publicis Worldwide as its global creative agency of record. Publicis Worldwide is the largest creative agency of the Publicis Groupe network and its appointment to Cadillac is effective immediately. A fully dedicated team, comprising key managers from Publicis Worldwide, will lead the account and have access to specialist and premium resources within the larger Publicis Groupe.

Cadillac Elmiraj Concept brings big coupe style to Pebble Beach [w/videos]

Two years ago, Cadillac absolutely floored us with the debut of its gorgeous Ciel concept at the Pebble Beach Concours d'Elegance. And since that droptop four-door's debut, we've seen plenty of its design language worked into the latest Cadillac products. Now, we're seriously hoping that history will repeat itself with this stunning new Elmiraj coupe concept, which makes its first public appearance in Monterey this week.
Cadillac states that the Elmiraj concept simply showcases the next step forward for the brand's Art & Science design DNA, and doesn't necessarily preview an upcoming model. But if you told us the Elmiraj was a conceptual look at the next-generation CTS Coupe, or a smaller, two-door version of a new flagship, we'd believe you. At 207 inches long, 76 inches wide and 55 inches tall, its dimensions are only slightly larger than the current two-door CTS.
Regardless of what the Elmiraj does or does not become, it's certainly a fantastic modern interpretation of the classic GT formula with its short front overhang, long hood, rakish roofline and petite rear deck. The strong character lines running along the sides and exaggerated 22-inch wheels round out the beautiful coupe, and Cadillac's signature vertical LED lighting elements are found at the front and rear. Also take note: the badge on the grille is a crest without a wreath, basically confirming our earlier report.