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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.

Costco Auto Program adds the Chevy Silverado and GMC Sierra through July

Costco members lean to the Bowtie when it comes to pickups. The big box store wrote that the Chevrolet Silverado "is currently the most requested Chevrolet and pickup truck through Costco Auto Program and has been for the past 11 years. In the 14 years Costco has partnered with Chevrolet for member-only incentives, the Silverado (when included), has been the top selling vehicle every time." Members can rejoice, because just for the months of June and July, the Costco Auto Program has added the Silverado and the GMC Sierra to its Costco Auto Savings Event. Until July 31, 2024, card-carrying shoppers can get an additional $1,000 discount on top of any manufacturer incentives they qualify for when leasing or purchasing new examples of either. The Auto Savings event includes other vehicles as well, the $1,000 incentive applicable to certain other models from Chevy and GMC, as as well Volvo and Cadillac. Tire kickers considering the Polestar 2 can get $2,000 off.  You can check out our write-up on the Costco Auto Program for all the details and the frequently asked questions. The summary is that the store works with "selected" dealers to refer customers to, about 3,000 storefronts across most automotive brands. The program comes with no-haggle pricing for any straight-up purchase. Costco offers customers a research tool to check out vehicles by type and compare specs and features. After a customer zeroes in on a car, it's time to visit the dealership for a chat with an "Authorized Dealer Contact" to examine the vehicle and go over the fine print. Haggling would only arise if the customer has a trade-in; that valuation is between the customer and the dealer. The customer can check out the Costco Member-Only Price Sheet, which "displays your prearranged pricing. The savings can be displayed in one of two ways: One version lists pricing for all models available at the participating dealership; the other will show a VIN-specific price based on the vehicle you select, including any applicable manufacturer incentives or rebates." And for those looking on the battery-powered shelves, the program offers the same $1,000 off the Chevy Blazer EV and Equinox EV.