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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

First 2016 Chevy Volt commercial rocks us to sleep

The 2016 Chevrolet Volt, with its thorough restyling and increased all-electric range, is an exciting evolution of Chevy's groundbreaking plug-in hybrid, so it's only fitting that the commercial campaign to sell it to the masses also be engaging and vibrant. Well, the first ad has just been officially released and it rocks... us to sleep. Now, we get that General Motors didn't want to repeat past Volt-commercial mistakes. No one wants to see dogs licking feet or dumb (and weirdly horny) aliens again. Nor would it be smart to slam all-electric vehicles, since it now sells the Spark EV and has just revealed its 200-mile Bolt concept. So, what does that leave? How about a mostly computer-generated spot that relies on cliche images and an upbeat synthetic soundtrack to communicate that the Volt is now as boring as other four-door appliances? An intro, featuring a lightly-bearded gentleman peering at his tablet through designer glasses launches us into the action as the Volt makes its way across a city bridge, then a curvaceous country road. Chevrolet doesn't include voiceover to inform you that the new Volt has a 50-mile battery-only range. There's no mention of its gas mileage once its electric charge is depleted – items that just might be of importance to hybrid buyers. The ad also makes no attempt at establishing an emotional connection, either through drama or comedy. There are, however, lots of fast cuts of the new, normalized interior, including a two-second detail shot featuring the windshield wiper switch. We imagine that this is only the first in a series of spots that will tell the Volt story and motivate potential buyers to run down to their local dealer, hopefully the next spots will be more interesting and informative. View 16 Photos

Autotrader picks best cars for 2015's college grads

Summer is here and the school season is winding to a close. That means millions of students will be graduating college and (hopefully) entering the workforce. For many, that will mean buying a new car suited to the new stage in life into which they will now be embarking. That can be a bewildering choice, especially for someone who's never bought a car before. Fortunately, Autotrader has come up with a short list of recommended cars – new and used – which it recommends to the graduating class of 2015. Among the site's top choices are some compelling crossovers and hatchbacks, including the Buick Encore, Chevy Trax, and Jeep Renegade, as well as the Honda Fit, Nissan Versa Note, Mazda3 and Fiat 500. Can't stretch to buying new, or don't see the point? Autotrader has also identified the Toyota Camry, Ford Fusion and even the Lexus IS as smart buys in the certified pre-owned category. "Any time someone goes through a major life change, such as graduating college, they need to determine if their current ride makes sense for their lifestyle, from both a financial and functional perspective," says Autotrader editor Brian Moody. "For example, while that hand-me-down SUV from your parents was nice when you turned 16, you may want to opt for a safer, more fuel-efficient car as you transition into the working world." Autotrader Names 10 Best Cars for Recent College Graduates ATLANTA, May 28, 2015 /PRNewswire/ -- For many, graduating college is a milestone like no other – it represents a new chapter, a proud accomplishment and, fortunately or unfortunately, financial independence. Luckily for graduates who are in the market for a new car to suit their post-college lifestyle, Autotrader's expert editors say now is a great time to make a purchase, as dealerships are flush with affordable models that are fun, fuel-efficient and thoughtfully designed. Autotrader Logo "Any time someone goes through a major life change, such as graduating college, they need to determine if their current ride makes sense for their lifestyle, from both a financial and functional perspective," said Brian Moody, site editor for Autotrader.