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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

Cadillac teases CT4 and CT5 V-Series Blackwing steering wheel

There's quite a bit that we know about the upcoming Cadillac V-Series Blackwing models. Thanks to spy shooters and prototypes, we've seen the CT4-V and CT5-V Blackwing out and about testing on public roads, which means we've seen the bronze wheels in staggered sizes. We've been told they will offer proper manual transmissions, and we know they will lap a race track quicker than the ATS-V and CTS-V they replace. And now we know what their steering wheels will look like. It's not much to base an entire teaser on, but there are a few interesting tidbits we can glean from Caddy's first official Blackwing tease. First, the wheel itself. It's leather wrapped (not Alcantra, at least on this example), it looks to have meaty bulges where you'll want to grip it, it has a red strip at the top to help locate straight ahead while driving aggressively, and it has a carbon fiber V-shaped spoke at the bottom. Finally, we see a prominent silver button labeled "V" on the left side that will allow drivers to quickly access V-Mode. To the right will be buttons for the Performance Traction Management system. Judging by the fuzzy background behind the wheel that shows some sort of digital gauge cluster, it seems that Cadillac may be aiming for a 200-mile-per-hour top speed for the CT5-V. That's not a stretch, as the last-generation CTS-V could hit that speed, too. Cadillac smartly took this shot in a way that blurs the center console, which means there's plenty more time to speculate on the transmission choices. Cadillac says the V-Series Blackwing models will be ready in time for the summer of 2021. Stay tuned. Related Video:  

What to see at the Detroit Auto Show 2023

The 2023 North American Auto Show — also known as the Detroit Auto Show — is underway downtown. If you want to attend the public days of the show taking place September 16-24, hereÂ’s what you need to know about attending. But now that Autoblog has done our reconnaissance during the showÂ’s press days, we can tell you about the actual cars (and other things) you can see and experience. WhatÂ’s new? Ford The big new item from Ford is the 2024 F-150 pickup. You can check out the new trick tailgate, and see what the fuss is all about. The 2024 F-150 Raptor also debuted at the show, if you like high-power, off-roady full-size pickups. The show will also be a good opportunity to see the Mustang Dark Horse and Mustang Mach-E Rally up close and personal. Unfortunately, we only saw the wild 2025 Mustang GTD at an offsite event during press days, but it's quite possible Ford will roll it out for the public. Cadillac Cadillac revealed its refreshed 2025 CT5 at the Detroit show, and you can get a look at the revised front and the new tech-focused interior. Cadillac recently unveiled the all-electric 2025 Escalade IQ, so you can stop and see the most powerful Escalade ever while youÂ’re there. It wasnÂ’t on the floor during media days, but Cadillac told us theyÂ’d bring it for the public part of the show. Jeep Jeep unveiled its 2024 Gladiator at the show, and you can check out the new interior and trim levels in person at the Jeep stand. Jeep also has an indoor track set up for ride-alongs. If you havenÂ’t had the chance to see the refreshed 2024 Wrangler yet, you can see that, too, along with examples from the rest of the Jeep lineup, along with its Stellantis sibling, Ram. GMC GMC showed off the new, larger 2024 Acadia SUV for the Detroit Auto Show. ItÂ’s bigger than before, but does more to differentiate itself from its Chevy cousin, the Traverse. GMC also has its Sierra EV on display if youÂ’re interested in catching that in person. What else to see A number of automakers have large displays at the show with many of their models represented. In addition to those who debuted something new at the show, Buick, Chevrolet (check out the Silverado, Blazer and Equinox EVs, as well as the Corvette E-Ray), Lincoln with the new Nautilus, Toyota (get a look at the new Tacoma), Volkswagen, Honda, Kia, Hyundai, Mini, Volkswagen, Honda, Chrysler (the Airflow concept is there), Fiat, Ram and Dodge (see the Charger Daytona SRT concept) all have a sizable presence.