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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

Chevy Bolt EV, Chrysler Pacifica, Honda Ridgeline take 2017 NACTOY prizes

Every year the 2017 North American International Auto Show kicks off with the North American Car of the Year Awards. We say "awards" after all those mentions of our home continent because it's not just cars. This year, in fact, the awards spread out to three separate honors: Car, Truck, and Utility. And without further ado, here are the winners. The 2017 Chevrolet Bolt EV is the Car of the Year, the Honda Ridgeline is the Truck of the Year, and the Chrysler Pacifica is the Utility of the Year. Honda's win is perhaps the biggest surprise, upsetting favorite the Ford F Super Duty for the win. The second-generation Ridgeline rides on a unibody platform and is offered in front- or all-wheel-drive, which is unconventional for a pickup. But the layout also offers a cargo bed with an in-floor trunk and solid fuel economy figures of 19 city, 26 highway in its most-efficient form. The Chevy Bolt EV, however, was probably the easiest winner to predict. Its 238-mile range and sub-$30,000 starting price after tax credits make it a breakthrough in the landscape of electric vehicles. With the Chrysler Pacifica available in a plug-in hybrid form, this year's award illustrates the industry's shift towards efficiency and electrification. And with Ford's recent announcement on future EVs, it might not be long will it be until we see a hybrid truck on the award stage as well.Related Video:

Mysterious white powder discovered at GM Orion Assembly

Workers at General Motors Orion Assembly Plant in Orion Township, MI uncovered a mysterious white powder in two different parts of the factory earlier this week, raising concerns about worker safety. "We can confirm that an unknown substance (white powder) was found on the floor outside of Gate 6 at Orion Assembly on Monday, August 29. On Tuesday, August 30, we had a second report of a bottle containing a similar substance found inside the plant," GM spokesperson Dayna Hart told The Oakland Press via email. GM stressed that incident didn't disrupt operations at the plant, and that the company was taking steps to ensure the safety of the sprawling factory's workers. That did include, an anonymous worker told The Oakland Press, closing off parts of the factory for two full days, as drug-sniffing dogs and crews in haz-mat suits descended on the area. "A sample of the substance has been sent to a laboratory for identification and results are expected later this week," Hart said. "All findings and actions have been shared with our employees." Orion Assembly currently builds the Chevrolet Sonic and Buick Verano, and will eventually be responsible for production of the new, all-electric Chevy Bolt early next year. Related Video: