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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

Next Cadillac CTS-V confirmed for Detroit

As a car enthusiast, you should be excited for the 2015 Detroit Auto Show. Hell, we can barely contain ourselves – it's shaping up to be a great show. And this bit of news only heightens our expectations – Cadillac will be bringing its third-generation CTS-V to January's North American International Auto Show. That bit of high-performance news has been confirmed to Autoblog by Cadillac officials. In fact, we've received an official invitation to the brand's press conference, and while the latter is light on information, it does say, "it's time for the V-Series to elevate to the next level." Considering our last experience with the CTS-V, we're not sure what there is left to elevate, although we're hopeful that Caddy will come up with something. What that could be, of course, is very open to speculation. When the last CTS-V debuted in 2009, it arguably outgunned Germanic challengers like the 500-hp BMW M5 and 518-hp Mercedes-Benz E63 AMG for a lot less money, boasting a detuned version of the Chevrolet Corvette ZR1's 6.2-liter supercharged V8. Could that trend carry on, with the next CTS-V borrowing the supercharged, 650-hp mill from the new Corvette Z06? If escalation is the name of the game, the Z06 engine would seem to once again allow Caddy battle it out on firm, big-booted footing with BMW and Mercedes-Benz. Of course, all will become clear on the morning of Tuesday, January 13. Like we said, we can hardly wait. Related Video:

Editors' Picks February 2022 | GMC Yukon, CT4-V Blackwing and Lexus NX 450h+

The shortest month of the year spawned a few Editors' Picks choices, and they come from a variety of categories amongst the car world. One comes with a particular caveat, the Lexus NX. Specifically, the new NX that gets our nod is the 450h plug-in hybrid model. We can heartily recommend an NX in this guise for its superb electrified powertrain, but the other versions fail to stir us in the same way. Beyond this, it's some of the latest from GM cleaning up, and they sure are some good ones. In case you missed our previous Editors' Picks posts, here’s a quick refresher on whatÂ’s going on here. We rate all the new cars we drive with a 1-10 score. Cars that are exemplary 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. The list that youÂ’ll find below consists of every car we rated in January that earned an EditorsÂ’ Pick. 2022 GMC Yukon Quick take: The Yukon is a big, comfortable and versatile SUV that has a little something for everybody, so long as you can stomach the fuel economy. It's an excellent middle ground between the Tahoe and Escalade. Score: 8.0 What it competes with: Ford Expedition, Jeep Wagoneer and Grand Wagoneer, Lincoln Navigator, Chevrolet Tahoe, Cadillac Escalade Pros: Tons of space, comfy ride, great trim variety, powerful engine options Cons: V8 Fuel economy, infotainment can be laggy, unexciting base interiors From the editors Road Test Editor, Zac Palmer — "GM's full-size SUVs are fantastic this time around, especially if you opt for the magnetic shocks and air suspension. The availability of a diesel engine that vastly improves fuel economy is huge, and the Denali trim is more special than ever with its unique interior design. I personally prefer the Yukon's styling over the Tahoe's, too." In-depth analysis: 2022 GMC Yukon Review | AT4 and Denali make the strongest case   2022 Cadillac CT4-V Blackwing Quick take: Cadillac is at the top of the mountain with its performance sedans, and the CT4-V Blackwing is no exception. One drive in this magnificent creation will have any enthusiast convinced that it's a top-tier sport sedan.