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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

North American Car, Truck and SUV of the Year finalists revealed

The finalists for the 2023 North American Car, Truck and Utility Vehicle of the Year Awards were announced Thursday at the L.A. Auto Show. — The Acura Integra, Genesis Electrified G80 and Nissan Z made the cut in the car category. — The Ford F-150 Lightning, Chevy Silverado ZR2 and Lordstown Endurance advanced in trucks. — And the Cadillac Lyriq, Genesis GV60 and Kia EV6 advanced among utilities.  The winners will be announced Jan. 11 in Detroit.  The finalists underscored the industryÂ’s shift to electric vehicles, as all three utilities and two of the three trucks are EVs. The finalists were culled from a list of 26 semifinalists made up of three trucks, 10 cars and 16 utility vehicles that are new this year.  Notables that missed the cut include the Mercedes EQE, Subaru WRX and Toyota GR Corolla in cars; while the Honda CR-V, Kia Sportage and Rivian R1S were among the utes that did not advance. The three trucks are the only ones eligible this year and have advanced through the voting.  50 jurors who work for media outlets across North America vote three times over the course of the year to whittle down the field, which was originally 47 vehicles. Jurors also test the semifinalists at an October group event in Ann Arbor, Mich. The Honda Civic (car), Ford Maverick (truck) and Ford Bronco (utility vehicle) were the 2022 winners. Autoblog Editor-in-Chief Greg Migliore is a NACTOY juror.   Featured Gallery Ford F-150 Lightning View 48 Photos Green LA Auto Show Acura Cadillac Chevrolet Ford Genesis Kia Nissan Truck SUV NACTOY Lordstown Endurance

Expect the Cadillac XT3 small crossover in late 2018

Cadillac's sedan-heavy lineup can't complete in this crossover-crazy market, it seems. The Detroit News spoke to Cadillac boss Johan de Nysschen and found out some more details about the brand's plan to alter its lineup to cater more to current consumer tastes. It's no surprise that these plans would include a small crossover, because de Nysschen has been talking about a vehicle smaller than the XT5 like this since at least 2015. The report also pins the Fairfax Assembly Plant, where GM builds the Buick LaCrosse and the Chevrolet Malibu, as the site for what could be called the XT3's production. That's not an immediately obvious choice, since the LaCrosse and Malibu are based on the latest evolution of the Epsilon platform, known as E2XX. And the XT5 is based on a crossover version of that same platform (known as C2XX), while XT3 is expected to be smaller than the XT5. So perhaps there's a different assembly line going into Fairfax, or the C2XX platform can be significantly shortened. We assume that the XT3 would be built on a smaller platform, perhaps the Gamma II that underpins the Chevrolet Trax and Buick Encore – which are built in either South Korea or Mexico, depending on which market they are to be exported to. The Encore is selling very well for Buick, with sales figures increasing through late last year. Another possibility is the D2XX platform that underpins the Chinese-built Buick Envision and the GMC Terrain and Chevrolet Equinox, perhaps with assembly happening at the CAMI plant in Ontario. At this early stage, without confirmation of GM as to what platform the XT3 will use or where it will really be built, it's too early to say what the Fairfax rumor means. This isn't the first time we've heard about a small Cadillac crossover. Back in 2015, de Nysschen told us to expect it sometime in 2018. But later that year, speaking to Reuters, he posited that it'd be closer to 2019. The Detroit News says de Nysschen told them it'll launch in the second half of 2018, splitting the difference between what we'd heard previously. Remember, Cadillac's only two vehicles in the segment are the XT5 and Escalade. We know that the brand is almost certainly scrambling to fill the holes in that side of the lineup. We think a three-row crossover will slot between the two, probably called the XT7.