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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 Silverado 1500 Quick Spin [w/video]

The Silverado 1500 gets what most would consider an early update for 2016. Just two years into this generation, the half-ton Chevy truck has been given a visual overhaul and a handful of feature upgrades. Chevy reps say they didn't wait the usual three years for a refresh because they knew the domestic competitors were planning updates of their own for 2015. We're told the fast refresh was always in the plans, and that it wasn't a response to critics (like us) saying "meh" to the new truck's design, which some felt hewed too close to the GMT900s that came before. If a Ford grille that reaches halfway into the headlights is good, a Chevy grille that cuts the units clean in two must be better. That's at least how we imagine the designers' thought process went. Those new split lights use HID projectors on lower models and full-LED tech on the upper trims, with all versions getting LED daytime running lights. LED taillights are also included on the fancier models. <p>Your browser does not support iframes.</p> Each of the eight trim levels has its own look, and the differentiation goes beyond the placement of chrome and the color of cladding. Look closely and you'll see that elements of the various grille treatments are repeated within the headlights. It's a neat touch, and proof that attention to detail is still a thing. Chevy also reshaped the hood, with sharp lines and pockets that look like they'll do a great job of collecting snow come winter. We get why a Corvette has troughs in its hood (you know where the wheels are and see through the valley to the road) but the surfacing on the Silverado's engine hat has only aesthetic benefits. On the feature front, almost all 2016 Silverado models get standard Apple CarPlay and Android Auto support; the 7.0-inch screen includes both, while the available 8.0-inch screen will add Android Auto through an update in March of 2016. The top High Country trim gets new power-articulating side steps as an option. In addition to swinging down to help you hoist yourself in through the door, the steps have a button at the rear that, when pressed, motors them down and rearward to give you a foothold at the front of the bed. Chevy also catches up to the competition with an available remote-locking tailgate. Chevy also gets further into the competitive numbers game for 2016 with expanded use of its eight-speed truck transmission.

Sunday Drive: Subaru Ascends up to the hottest market segment in America

Utility vehicles – in other words, crossovers and SUVs – are so hot right now. Two of our top stories from last week revolve around the utilitarian vehicle, but besides their jacked-up, five-door bodystyles, they couldn't be more different. The 2019 Subaru Ascent is headed into an extremely crowded and competitive segment, where it'll have to go up against industry stalwarts like the Toyota Highlander and Honda Pilot, not to mention upstart contenders like the Volkswagen Atlas. The Mercedes-AMG G63, on the other hand, has very little competition – there simply aren't very many ultra-luxurious, off-road-ready SUVs in the world vying to attract the dollars of the wellest-to-do customers across these United States. Moving on from crossovers and SUVs, our readers remain attracted to classic front-engine, rear-wheel-drive sportscars. The Toyota Supra's upcoming rebirth earns two places on our list of stories worth highlighting from the week that was; one with leaked information from a Japanese magazine, and another with rumors indicating that maybe we shouldn't be quite so excited. And finally, there's the strange case of the long-lost 2009 Chevy Corvette Z06 that one lucky individual happened to find squirreled away in a storage container with just 720 original miles. A high-horsepower head scratcher if we've ever seen one. As always, stay tuned to Autoblog this week for all the latest automotive news that's fit to print. 2019 Subaru Ascent vs Honda Pilot vs Toyota Highlander: How they compare on paper 2019 Mercedes-AMG G63 set to bare its 577-horsepower heart in Geneva Toyota Supra leaks in Japanese magazine ahead of Geneva debut Toyota Supra to be little more than a rebodied BMW Z4? Forgotten 720-mile 2009 Corvette Z06 emerges from storage Chevrolet Mercedes-Benz Subaru Toyota Coupe Crossover SUV Luxury Off-Road Vehicles Performance barn find sunday drive subaru ascent mercedes-amg g63