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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

Sunday Drive: Taking a gaze into the automotive crystal ball

Mankind has long been fascinated by the future. So it makes sense that this past week's top stories were all about cars, trucks, and SUVs that won't be hitting the market until the 2019 model year. And right at the top of the list is the Ram 1500. We've come to know Ram as the truck maker that styles its pickups with cues cribbed from big rigs, but that look has slowly evolved over time into something uniquely its own. The next Ram 1500 continues this trend, with a newly refined look that we can't wait to see in person. Up next is the 2019 Chevy Silverado. Pickup trucks have been, continue to be, and will remain the best-selling vehicles in America. And General Motors is a leader in the field, with two distinct offerings with which to entice buyers, one from the bread-and-butter Chevrolet brand and one wearing the slightly more upscale GMC badge. The Chevy looks to get LED lighting elements for 2019, which ought to keep the truck from looking dated when compared to the Ford F-150 and the previously mentioned Ram 1500. From there we move past pickup trucks and into SUVs and sedans. The 2019 Jeep Cherokee looks to get toned down a bit with its next refresh, and the '19 BMW 3 Series continues its slow evolutionary journey at the top of its aspirational sales pedestal. Finally, spy shots give way to official production reveals for the 2019 Audi A7 and Polestar 1. This pair of European luxury cars won't compete with one another – one is a rakish hatchback and the other a sports coupe – any further than for the eyeballs of our readers, but both proved popular enough to merit inclusion in our weekly roundup. As always, tune in to Autoblog next week for a front-row seat to all the happenings worth following in the automotive industry. 2019 Ram 1500 spotted without the classic crosshairs 2019 Chevy Silverado spied with new LED accents 2019 Jeep Cherokee reveals a much more normal face 2019 BMW 3 Series spy shots reveal production lights, new interior details 2019 Audi A7 revealed: More torque, refined styling Polestar 1 First Look | The 600 horsepower hybrid Scandinavian Green Audi BMW Chevrolet Jeep RAM Volvo Truck Hatchback SUV Future Vehicles Hybrid Luxury Performance Sedan sunday drive polestar 1

Autoblog Podcast #393

Episode #393 of the Autoblog Podcast is here, and this week, Dan Roth, Steven Ewing, and Michael Harley talk about Monterey Car Week, the Woodward Dream Cruise and Dodge Charger Hellcat, and the latest round of mid-engine Corvette rumors. Dan also had the chance to speak with Jeffrey Rothfeder, author of Driving Honda, a new book that takes a look inside the automaker. We start with what's in the garage and finish up with some of your questions, and for those of you who hung with us live on our UStream channel, thanks for taking the time. Check out the new rundown below with times for topics, and you can follow along down below with our Q&A. Thanks for listening! Autoblog Podcast #393: Topics: Monterey Car Week Jeffrey Rothfeder (Driving Honda) interview Woodward Dream Cruise + Dodge Charger Hellcat Mid-Engine Corvette rumors just won't die In The Autoblog Garage: 2014 Jaguar F-Type V6 S Convertible 2015 Chevrolet Silverado 2500HD 4X4 CNG 2014 Nissan NV200 SV Hosts: Dan Roth, Steven Ewing, Michael Harley Runtime: 02:10:41 Rundown: Intro and Garage - 00:00 Monterey Car Week - 37:08 Jeffrey Rothfeder - 52:17 Woodward 2014 - 01:28:11 Mid-Engine Corvette - 01:44:30 Q&A - 01:56:53 Get the podcast: [UStream] Listen live on Mondays at 10 PM Eastern at UStream [iTunes] Subscribe to the Autoblog Podcast in iTunes [RSS] Add the Autoblog Podcast feed to your RSS aggregator [MP3] Download the MP3 directly Feedback: Email: Podcast at Autoblog dot com Review the show in iTunes Podcasts Rumormill Chevrolet Dodge Jaguar Nissan Pebble Beach mid-engine corvette dodge charger hellcat