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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 Crossvolt name kept alive in new trademark application

In April 2011 General Motors submitted a trademark application with the US Patent and Trademark Office for the word "Crossvolt." In November of this year, the application expired for lack of a statement of use. But in August of this year, GM applied again for the same trademark, leading some to believe that it intends to apply the name to a vehicle. That vehicle could explain the mule in sliced-and-diced Chevrolet Orlando bodywork caught in several spy shots this year, theorized to be some kind of Toyota Prius V or Ford C-Max Hybrid competitor; or it could be a production version of the Chevrolet Volt MP5 concept showed off at the Beijing Motor Show in 2010, which was about the same size as the Chevy Orlando. Or it could be none of those things – but the fact that Chevrolet is keeping it current makes us believe it will be... something. Featured Gallery Beijing 2010: Chevrolet Volt MPV5 concept View 13 Photos News Source: Fox News, Trademarkia Green Chevrolet GM Crossover Hybrid trademark uspto

Submit your questions for Autoblog Podcast #323 LIVE!

We're set to record Autoblog Podcast #323 tonight, and you can drop us your questions and comments regarding the rest of the week's news via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
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