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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 to move select offices from Detroit to Manhattan?

Under Johan de Nysschen, Infiniti moved its headquarters from Yokohama, Japan, to Hong Kong. Now at Cadillac, it appears the company's new president could be planning a relocation of at least some of the brand's operations from Detroit to Manhattan, according to a new report from Reuters.
In the case of Infiniti, de Nysschen pushed for the move because moving away from the brand's Nissan overlords would allow it a bit more freedom. It's evidently a similar case for Cadillac, with Reuters speculating that such a move would help distance the brand from the corporate culture in Detroit. A Big Apple move could also attract new talent that may have considered a job with the brand but were put off by the idea of living in Detroit.
It's important to note that if such a move takes place, it likely won't affect the folks actually responsible for developing the brand's vehicles. Instead, administrative functions, including marketing, could be the focus of the relocation.

Cadillac is bringing a new concept to Pebble Beach

Cadillac will debut a new concept Thursday in Monterey. The company also released teaser video, but it only shows us a few glimpses of interior parts and a concept drawing that seems to show a very minimalistic dashboard. The big draw appears to be the large screen filling in for instruments and infotainment. According to Cadillac, the screens are curved OLED panels co-developed with LG, and the technology behind them will appear in a future Cadillac. Bringing a new concept to the famous Monterey Car Week is a return to form for Cadillac. In past years the company brought beautiful concepts like the full-size, four-door Ciel convertible, and the taught, athletic Elmiraj coupe. The latter of these showcased designed cues that trickled into production Cadillacs. No word (or pictures) on the exterior yet. We'll be sure to have complete coverage of the concept later this week. Related Video: Image Credit: Cadillac Cadillac Concept Cars Videos Pebble Beach