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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

Next Chevrolet Malibu to have 'groundbreaking,' 'passionate' design

In our First Drive of the Chevrolet Malibu after its redesign in 2013 we wrote, "Chevy has quickly worked up a host of changes for its ever-important midsize sedan, and will be launching this 'there, we fixed it' 2014 Malibu like it's an all-new product." Still, no one cared. The Malibu has been mentioned in eight posts this year, all but two of them dealt with recalls, and one of those two was about a 2011 Malibu university science project. It came up in precisely zero posts from November 2013 to March 2014. That's why, according to a report in Automotive News, Chevrolet honchos are "hustling" to have a new Malibu ready in a year. Mark Reuss, General Motors' head of global product development, said it will have "groundbreaking design" and "groundbreaking technology," and asked investors who were showed a picture of it, "When is the last time you saw a [midsize] car this distinctive and this dramatic from General Motors?" Doubling down on the bullishness, Reuss said, "We've got our act together here on the midsize-car segment." Then, throwing every last chip on the pile, global design head Ed Welburn said the next Malibu's design will "make a significant statement" with "a very passionate design." Based on the number of comments Malibu posts get, we figure a fair few number of you would love for this to be the case; yet this is a lot of braggadocio to slather on a car that probably hasn't made "a significant statement" since Elton John had a number one record with Honky Chateau. That was 1972, if you're trying to remember. No matter the looks, the AN report says the new 'Bu will make a profit statement, selling for more money while costing less to produce. Alongside the Cruze, GM figures the pair will bring in an extra $800 million in variable profit in 2016. Which, in case it ends up being another 'butterface,' isn't bad for a silver lining. Featured Gallery 2014 Chevrolet Malibu: First Drive View 36 Photos News Source: Automotive New - sub. req. Design/Style Chevrolet GM Sedan

2014 Corvette Stingray meets Tesla Model S in drag strip showdown

They come from two different worlds and have little in common. The Tesla Model S P85 is the sportiest version of this paradigm-punching sedan from California, while the 2014 Corvette Stingray Z51 is a performance-enhanced version of Michigan's recently-updated sports car stalwart. The West Coast car seats five adults and eats electrons like Popeye eats spinach, the Easterner has two passenger places and, surprisingly, sips gasoline like one might bourbon. An attribute they do happen to share is extreme quickness. This similarity is all the excuse Drag Times needed to set the vehicles beside each other at the Palm Beach International Raceway for a bit of mano-a-mano quarter-mile combat. Fortunately enough, cameras were rolling for each of two bouts down the blacktop and the results recorded for our edification and enlightenment. The winner? We won't spoil it for you, but let's just say it's really, really close. How close? Scroll below and watch the video for yourself. Just be warned, the results may surprise you. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.