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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

2016 Chevrolet Equinox gets styling tweaks, not much else

The current Chevy Equinox debuted over five years ago, in late 2009. Since then, the midsize crossover segment has become increasingly important, with brand-new entries meeting substantially overhauled versions of existing nameplates. But the Equinox carried on, largely unchanged. And while Chevy is using its Chicago Auto Show stage to debut the freshened, 2016 Equinox, it appears there isn't a whole lot to talk about. Take a look at the updated Equinox's exterior and you're pretty much going to see all that's new for 2016. Sure, the Chevy still boasts a handsome, inoffensive design, and it's now upgraded with things like LED running lamps on top-level trims, as well as new 17- and 18-inch wheel designs, projector beam headlamps, and revised taillamp styling. Moving inside, Chevy has added a standard seven-inch color touchscreen to all models, which includes a backup camera. New-to-Equinox safety features like side cross traffic alert and side blind zone alert are also available for 2016. And really, that's about it. Powertrain options carry over from last year. On the base end, there's a 2.4-liter inline-four that's good for up to 32 miles per gallon on the highway (with front-wheel drive). Buyers can also opt for a 301-horsepower, 3.6-liter V6 that allows the Equinox to tow up to 3,500 pounds. Will this be enough to keep the Equinox fresh in its highly competitive class? In 2014, the Equinox did outsell lower-volume competitors like the Mazda CX-5 and Subaru Forester, but was bested by fresher offerings like the Ford Escape, Honda CR-V, and Toyota RAV4. Have a look at all there is to know about the 2016 Equinox in the press blast below. We'll have live images and more impressions direct from the Chicago show floor, soon. Fresh Face: Chevrolet Introduces Restyled 2016 Equinox Premium cues, new safety features enhance Chevy's record-selling compact SUV CHICAGO – Chevrolet today introduced the 2016 Equinox – a contemporized version of the popular compact SUV. Updates include new styling with premium accents, new wheel designs and new available safety features, as well as a larger color touchscreen radio and a standard rear-vision camera for entry-level models.

Are you the 2014 Corvette Grand Sport?

When are stripes more than just stripes? Follow up question: Is the product development team at Chevrolet really cocky enough to hide the next C7 Corvette variant in plain sight? This very recently spotted, and ostensibly obscured C7 asks a lot more questions than it answers, but there's at least some evidence to support that it might be the next Corvette Grand Sport.
The first and most obvious tip-off that something is up with this 'Vette revolves around those silver stripes. Obviously the stripes themselves don't necessarily denote a new model. However, when Chevy recently launched its "colorizer" website for the Stingray, there was no provision made for racing stripes - solid colors only.
Grand Sport exhibit number two is actually an incriminating lack of badges. The production Corvettes we've seen to date have all carried Stingray badges on their fenders, just behind the vent. The car seen in these images has no such badges, which is an intriguing omission on an car that looks like a production-spec vehicle otherwise.