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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

6 luxury car brands to watch in 2024

2023 was a healthy year for the auto industry, and even with incentives returning and dealer lots filling up, there's plenty to like about the market if you build luxury automobiles, and we expect 2024 to be more of the same, which makes luxury-segment rivalries all the more interesting. Top luxury car brand rivalries? Well, that sounds downright uncivilized. But we know better, don't we? And when every quarterly sales update is an opportunity to remind somebody else that they bought the wrong status symbol, well, who can resist? Certainly not the diehard customers who fly their favorite brands' banners high.  Read more: Auto sales: Industry records best year since 2019 Read more: 2023 auto sales and 2024 preview: Ford Bronco vs. Jeep Wrangler This is a tricky segment to define, but essentially, we're looking at luxury car brands with depth to their portfolios and dealerships that exist to attract real-world customers. The Bentleys, Rolls-Royces and McLarens of the world are luxury cars, certainly, but we're more concerned with brands that have a bit more mass appeal — manufacturers who treat supply constraints as fiascos rather than features. If you disagree with our selections, feel free to let us know in the comments.  And since we're mostly concerned with finishing order, the luxury brands and totals featured here may change as new data come in throughout 2024. Due to the wild swings of the past several years, we're treating 2023 as the baseline by which we'll measure sales performance. And rather than rank brands vs. their finishing order in 2022, when supply-chain and inflationary issues still played havoc with sales figures, we're starting 2024 off with a clean slate.  The mainstream luxury segment is always a dogfight, but with their varied approaches to electrification all of the major luxury brands are in the midst of reshaping the premium landscape. Who is doing it right? Well, according to U.S. shoppers, the usual suspects are up to their old tricks.

Recharge Wrap-up: BMW to test autonomous cars, Korea bans sales of BMW, Nissan, Porsche models

BMW will test autonomous cars on public roads by the second half of 2017. The German automaker, with partners Mobileye and Intel, will operate a fleet of 40 self-driving vehicles using a "scalable architecture" that will be made available to other automakers. The partners plan to offer products ranging from key components to "a complete end-to-end solution" for autonomous driving. Since parting ways with Tesla, Mobileye also recently announced it would provide its technology to Lucid Motors. For BMW, it all leads up to its fully autonomous iNext model slated for introduction in 2021. See the video above, and read more in the press release from Intel. South Korea has banned the sale of certain models from BMW, Nissan, and Porsche over emissions cheating. Following an investigation, regulators determined emissions testing documents to be falsified. The country's Ministry of Environment has fined the three automakers a total of $5.9 million, and revoked the certification of 4,523 vehicles across banned 10 models. Six of the models were still on sale, while the other four have been discontinued. Read more from Automotive News Europe. China's prices for the Cadillac CT6 Plug-in are significantly higher than those announced for the US. The plug-in hybrid version of the luxury sedan recently went on sale with the two variants priced at RMB 558,800 and RMB 658,800. At the time of this writing, that's $80,420 and $94,812. Cadillac announced it would bring the CT6 Plug-In Í– which is built in China – to the US in the spring of 2017, starting at $76,090 before federal and local tax incentives. Hybrid Cars points out that China's own generous incentives could help to make it more competitive. The offering of a charger with free installation as well as an eight-year warranty on the electric powertrain should help, too. Read more at Hybrid Cars. A Connecticut court has ruled in favor of Tesla's gallery showroom in Greenwich. Last May, the Connecticut Automotive Retailers Association brought the suit to block the showroom on Greenwich Avenue, which has now been dismissed by the Connecticut Superior Court. Tesla cannot offer test drives, sell cars, or operate a Supercharger at the location, but it can sell other branded items and educate the public about its vehicles. It's possible that the issue of Tesla's direct sales model could come up again this year in Connecticut state legislature. Read more at Teslarati .