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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

GM offering factory-backed extended warranty for Chevys, GMCs, Buicks and Cadillacs

Cars are generally more reliable than ever before. When things do go wrong, every automaker offers some form of factory warranty (in most cases at least three years and 36,000 miles, though many extend even longer), providing peace of mind to new-car buyers that many faults will be fixed at no charge to the customer. Starting today, GM is offering a new optional plan that will extend the factory warranty on all new Chevy, GMC, Buick and Cadillac products. In the past, extended warranties have been offered as dealer add-ons, with all profits from these sales going to the dealership. GM's new program can be viewed as another nail in the the looming dealership-model coffin. According to Automotive News, some dealers aren't happy to see GM cut into their business like this, saying that it helps GM far more than it does dealers. GM says the new program will help keep customers in the GM family. Customers are also more likely to visit a GM service center rather than going to an independent repair shop. Currently, new Chevy and GMC vehicles come with three-year/36,000-mile warranties. Buicks and Cadillacs are covered for 4 years or 50,000 miles. The new program extends Chevy and GMC warranties to five years or 60,000 miles. Buick and Cadillac warranties extend to six years or 70,000 miles. GM, citing IHS Markit, says most owners keep new cars for about 6.8 years, so these warranties will cover most of the length of their ownership. The extended warranty will add between $1,000 and $2,000 to the price of a vehicle, and the additional cost can be rolled into the vehicle's purchase or lease price. Unlike many dealer extensions, the factory program covers the vehicle no matter who owns it. That should help increase the car's resale value if it's sold within the covered timeframe. GM says there's no deductible and no need to file a claim form when getting warranty repairs. Additionally, dealerships can continue to sell their own extended warranties or service contracts. Related Video:

10 electric cars we’re excited are coming soon

If you were considering buying an electric vehicle a couple years ago, we wouldn't fault you for thinking your options were limited, both in terms of quantity and quality. You just might not have been able to find an electric car that would suit your needs, lifestyle or budget. With the newest generation of EVs that have launched in the past year or two, your options have changed — and improved — dramatically. If you still don't see an EV you like, just wait a little while longer. It won't take long. There are a whole lot more on the horizon, and the problem may soon be in narrowing down your options. To give you an example, here are 10 electric vehicles we're excited about that you'll be able to buy very soon, from GM, from Germany, from Japan and more. Some of these will be available by the end of the year, and all are expected to launch by the end of 2023. The Chevy trio: 2024 Blazer EV, Equinox EV and Silverado EV GM is stepping into the future with strong footing. Following high-end electric launches from GMC (Hummer EV) and Cadillac (Lyriq), Chevrolet is bringing three electric vehicles with familiar nameplates. The 2024 Chevy Blazer EV (above left) will offer a number of versions, starting with the 2LT and RS trims in the summer of 2023, followed by the 557-horsepower SS in the fall and the base 1LT in early 2024. The 2024 Chevy Equinox EV (above right) will go on sale in fall 2023 as a limited-edition model, with volume sales ramping up in 2024, with a base cost of “around $30,000.” For those who prefer a bed to a liftgate, the 2024 Chevy Silverado EV is an electric pickup that looks more like the old Chevy Avalanche than the current Silverado. The WT (work truck) trim launches in fall 2023, while the 664-horsepower RST will follow in 2024. Read more: 5 new electric car companies coming in 2023 and beyond 2023 BMW i7 BMW revealed the all-electric 2023 i7 luxury sedan alongside the gas-powered 7 Series. It should go on sale before the end of 2022. The i7 xDrive60 will be the only variant, with its two motors providing a total of 536 horsepower and 549 pound-feet of torque, and its battery expected to offer a range of about 300 miles. Just like its internal combustion counterpart, this full-size sedan wonÂ’t come cheap, with the i7 starting at $120,295. 2023 Hyundai Ioniq 6 Following the Hyundai Ioniq 5, Kia EV6 and Genesis GV60, the 2023 Hyundai Ioniq 6 will be the fourth car using Hyundai GroupÂ’s E-GMP electric car architecture.