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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

'Tomorrowland' movie will advertise Chevy Volt, E-NVs

Before the 2016 Chevrolet Volt arrives at dealerships, it's going to come to a cineplex near you. The next-generation hybrid and the EN-V electric networked vehicle concept will play bit parts in the background of the upcoming Disney movie Tomorrowland starring George Clooney and Britt Robertson. Chevrolet will run digital and television ads around the movie's opening, which is May 22 in the US. The Bowtie and Disney tie-up is another in their years-long collaboration, going back to the revamped Test Track that opened at Epcot Center in 2012, and Chevolet is also the official vehicle of Shanghai Disney. The press release below has more on the movie and the Volt, the movie trailer is above – there's no Volt in it, but there is a late-model Buick. Chevrolet and Disney See Possibilities in 'Tomorrowland' Film to help kick off marketing efforts for next-generation Chevrolet Volt DETROIT, 2015-03-26 – At their core, Disney and Chevrolet are entities of optimism, believing that with a little ingenuity, anything is possible. They will come together in the new Disney film "Tomorrowland" to imagine the possibilities. The all-new 2016 Chevrolet Volt and EN-V concepts appear in the backdrops of the present day and Tomorrowland. The film's U.S. debut is May 22. In Disney's riveting mystery adventure "Tomorrowland," a jaded scientist and an optimistic teen embark on a danger-filled mission to unearth the secrets of an enigmatic place somewhere in time and space. "Tomorrowland is a place where nothing is impossible, which is something that Chevrolet believes can exist in the here and now," said Tim Mahoney, vice president, Global Chevrolet. "The Chevrolet spirit reflects the hopes and possibilities of tomorrow in real instruments of change for today like the next-generation Chevrolet Volt." The first marketing efforts for the 2016 Chevrolet Volt will be tied to Tomorrowland. A television spot and digital advertising will debut in early May. The all-new Volt is an electric car with extended range, showcasing a sleeker, sportier design that offers 50 miles of EV range, greater efficiency and stronger acceleration. The Volt's new, efficient propulsion system will offer an estimated total driving range of more than 400 miles. With regular charging, owners can expect to average more than 1,000 miles between gas fill-ups. Chevrolet and Disney have a long history of collaboration around the globe.

GM Halts Sale Of Most Chevy Cruze Models

General Motors has told dealers to stop selling some 2013 and 2014 Chevrolet Cruze compact cars. But the company won't say why. Dealers say stop-sale orders are routine and almost always made to fix a safety problem. They received the order in an e-mail Thursday, but no reason was given. The move comes as GM deals with fallout from a delayed recall of 1.6 million older small cars to fix an ignition switch problem. The company says the switches can slip out of the run position and shut down the engine. That causes loss of power steering and brakes and disables air bags. GM says the problem has been linked to 31 crashes and at least a dozen deaths. Spokesman Greg Martin says he has no details on the Cruze. Related Gallery Chevy Impala Earns Highest Accolades From Consumer Reports Recalls Chevrolet GM Cruze