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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

GM considering new powertrain options for large SUVs

Aside from the new General Motors offerings, there's not a whole lot of action going on in the fullsize SUV segment. That doesn't seem to be stopping GM from pushing the envelope in the market as Automotive News is reporting that the automaker is looking to introduce some new powertrain options into the Chevy Tahoe (and Suburban), GMC Yukon (and Yukon XL) and the Cadillac Escalade - all have been redesigned for the 2015 model year.
Now, we already know that GM and Ford are collaborating on nine- and ten-speed transmissions for a broad range of applications (including the big SUVs), but this new report says that GM is also considering other options as a way to one-up the competition and, of course, to optimize fuel economy. AN quotes Jeff Luke, executive chief engineer for GM trucks, as saying that "interesting powertrain technologies" are coming including a return of a hybrid SUV and possibly even a diesel engine. Although it sounds like the latter could come down to how customers respond to the 2014 Jeep Grand Cherokee EcoDiesel.

Editors' Picks February 2021 | Ford F-150, Genesis GV80, Mazda CX-30 and more

If we’ve driven and reviewed it, thereÂ’s an Autoblog Rating for it. ItÂ’s been over two years since we launched a new rating system to help you evaluate cars at a glance. We tweaked and improved it along the way and quickly arrived at a consistent process for giving each and every car on sale today a fair score. Cars that are exemplary or stand out in their respective segments get EditorsÂ’ Pick status. Those are the ones weÂ’d recommend to our friends, family and anybody whoÂ’s curious and asks the question. Every car we rate gets a score from 1 to 10, making it easy for you to tell if itÂ’s a car worth pursuing and possibly purchasing. YouÂ’ll find the scores of previously-rated cars attached toward the top of our written reviews. For example, the Bronco SportÂ’s rating can be found here. The Acura TLXÂ’s rating is in this post, and the Nissan RogueÂ’s rating is right here. There are hundreds of examples to be found. The above examples make up the most natural ways to find the Autoblog rating when researching for your next car, but starting today, weÂ’re going to begin calling out each new set of Editors' Picks per month in their own breakout stories. This will put the newest and most recently refreshed cars on sale on a pedestal for you to see which ones are worth your while. WeÂ’ll typically rate anywhere between 5-10 new cars per month, so you can count on just a select few from those to make this list. Expect to see this recurring ratings post each month going forward, and read on for FebruaryÂ’s EditorsÂ’ Picks.   2021 Genesis GV80 2021 Genesis GV80 View 18 Photos Quick take: The stylish GV80 offers useful safety features, compelling design and sporty dynamics to push it near the top of the segment. Genesis takes risks with this aggressive crossover, and the result is a luxurious vehicle that is rewarding to drive. Score: 8.5 What it competes with: Lincoln Aviator, Volvo XC90, BMW X5, Mercedes-Benz GLE-Class, Acura MDX, Lexus RX Pros: Beautiful design, good road manners, awesome value Cons: Small third row and cargo space, less comfortable standard suspension  From the editors: Editor-in-Chief Greg Migliore — “The GV80 is a hugely important vehicle for Genesis. It makes a style statement, has an elegant interior and is a compelling all-round execution. It looks like a Bentley, and I give Genesis props for taking some risks with the GV80 and largely pulling it all off.