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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

Chevy rolls out Silverado HD High Country

It's been a good week for heavy-duty truck buyers. First, Ram revealed the Black Package for its HD trucks, then it rolled out its new Power Wagon, and now Chevy's getting in on the action with its Silverado High Country HD. Okay, so it may not pack quite the attitude of Ram's latest 2500-series offerings, but the High Country HD will come as a welcome addition to the Chevy Trucks range to those looking to pull their horse, boat or other trailer without skimping on creature comforts.
Rolled out a little under a year ago, the High Country trim is Chevy's answer to the likes of the GMC Denali, Ford King Ranch and Ram Longhorn. It has until now only been offered on the light duty, 1500-series Silverado, but now extends to the 2500 and 3500-series HD models, as well.
So what sets a High Country pickup apart from lesser Chevy trucks? You'll be able to pick it out based on its chrome horizontal grille, body-color bumpers, 6-inch tubular side steps, 20-inch chrome wheels (18-inch on the 3500 and 17-inch on the dualie) and, of course, plenty of special badging. But it's inside where the High Country makes its mark, with a cabin decked out in saddle brown perforated leather, seats that are both heated and cooled, eight-inch touchscreen with full MyLink suite, Bose audio and park assist functions front and rear to keep those color-keyed bumpers looking fresh. (Though Chevy hasn't yet showed us the interior of the HD model, it'll presumably look mostly the same as the cab in the 1500 High Country in the gallery below.)