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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

Cadillac goes white-out on social media as prelude to Oscars announcement [w/video]

Cadillac appears to be in a very odd place at the moment. On one hand, Johan De Nysschen is pushing the company towards a much more luxurious image that includes converting 700 dealers into boutiques, and a blitz of new products is also supposed to be on the way in the coming years. However, at the moment sales aren't necessarily keeping pace with production, and there are reportedly heavy incentives available on some models. Now, we're seeing the earliest hint at the next strike in the brand's strategy as its social media presence goes white across the web. Go check out Cadillac's official pages on the major social media hubs, and all you can find is blank space. There's just a period on Twitter, a blank box on Facebook, another one on Instagram and the company logo is even gone from Pinterest. Perhaps most bizarre is YouTube, where Caddy is showing five minutes of absolutely nothing (embedded below) with no sound at all. The video description is only a period. All of this nothingness is supposed to be a lead-up to Cadillac unveiling a completely new advertising campaign during the Oscars on February 22. This method of blanking everything out beforehand could suggest a minimal, to-the-point message in the future. While it wouldn't be shocking for a few teasers to come out in the meantime, Caddy is keeping quite a secret before the big reveal.

EV tax credits: Here's every electric car or plug-in hybrid that qualifies

Starting on April 18, the Internal Revenue Service released new guidance for U.S. buyers shopping for a new electric or plug-in hybrid vehicle. On April 18th, the IRS showed only six fully electric vehicles on the qualified list, but a day later Volkswagen confirmed its U.S.-built ID.4 also qualifies. That means right now, seven fully electric vehicles qualify for the full $7,500 EV tax credit, with three more from Chevrolet coming for the 2024 model year (we would expect these 2024 models to roll out slowly and be difficult to find for at least the first few months they are on the market). In addition to those seven fully electric cars, two plug-in hybrids also qualify for the full $7,500 credit. To qualify, a vehicle must be assembled in North America and must meet a strict set of guidelines that cover where battery materials were sourced. If any battery materials come from certain countries (importantly including China), the vehicle's tax credit is automatically cut in half. Further, according to the IRS, the vehicle's manufacturer suggested retail price (MSRP) can't exceed $80,000 for vans, sport utility vehicles and pickup trucks or $55,000 for any other type of vehicle (basically meaning sedans). Electric vehicles that qualify for the full $7,500 EV tax credit: Cadillac Lyriq (2023-2024) Chevrolet Blazer EV (2024) Chevrolet Bolt EV (2023-2024) Chevrolet Bolt EUV (2023-2024) Chevrolet Equinox (2024) Chevrolet Silverado (2024) Ford F-150 Lightning — all models (2022-2023) Tesla Model 3 Performance (2022-2023) Tesla Model Y — all models (2022-2023) Volkswagen ID.4 — U.S.-built models (2022-2023) Plug-in hybrid cars that qualify for the full $7,500 EV tax credit: Chrysler Pacifica PHEV (2022-2023) Lincoln Aviator Grand Touring (2022-2023) A smaller credit is offered on fully electric cars and plug-in hybrids that are assembled in North America but have batteries with materials sourced from unqualified countries (mostly China).