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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

Next Cadillac CTS-V confirmed for Detroit

As a car enthusiast, you should be excited for the 2015 Detroit Auto Show. Hell, we can barely contain ourselves – it's shaping up to be a great show. And this bit of news only heightens our expectations – Cadillac will be bringing its third-generation CTS-V to January's North American International Auto Show. That bit of high-performance news has been confirmed to Autoblog by Cadillac officials. In fact, we've received an official invitation to the brand's press conference, and while the latter is light on information, it does say, "it's time for the V-Series to elevate to the next level." Considering our last experience with the CTS-V, we're not sure what there is left to elevate, although we're hopeful that Caddy will come up with something. What that could be, of course, is very open to speculation. When the last CTS-V debuted in 2009, it arguably outgunned Germanic challengers like the 500-hp BMW M5 and 518-hp Mercedes-Benz E63 AMG for a lot less money, boasting a detuned version of the Chevrolet Corvette ZR1's 6.2-liter supercharged V8. Could that trend carry on, with the next CTS-V borrowing the supercharged, 650-hp mill from the new Corvette Z06? If escalation is the name of the game, the Z06 engine would seem to once again allow Caddy battle it out on firm, big-booted footing with BMW and Mercedes-Benz. Of course, all will become clear on the morning of Tuesday, January 13. Like we said, we can hardly wait. Related Video:

It's going to cost $12 billion to fix Cadillac

The Cadillac CT6's development predates Johan de Nysschen taking over at Cadillac, but the forthcoming flagship is the luxury brand's first major new product launch since the beginning of his tenure. The vehicle's debut also marks the beginning of a comprehensive $12 billion renewal plan bringing eight new vehicles in the next five years. Now, the former Audi and Infiniti exec is talking about joining Caddy and the company's future. "Cadillac will be a powerhouse global luxury brand that will command the respect of its peers," de Nysschen said about the forecast state of the company in 2020 to Bloomberg. He disclosed that three of those new vehicles under the five-year plan would be crossovers and reiterated that plug-in hybrids are on the way that would take advantage of the Chevrolet Volt's tech advances. De Nysschen also reminisced about joining Cadillac last year. He told Bloomberg that leaving Infiniti wasn't an easy decision, and there were apparently long conversations on the phone with General Motors President Dan Ammann discussing strategy for the luxury brand. De Nysschen was apparently clear that a greater investment and more autonomy from the corporate mother ship were vital. These days, the revitalization of Cadillac is just getting rolling. The company has a swanky New York office with a dedicated team to focus on the future. According to de Nysschen, the brand will grow its staff to around 150 people by the end of the year, compared to over 40 now. The marketing plan is to position the American luxury brand as a more distinctive product versus more common German rivals. It's going to be very interesting to see if this new Caddy can dare greatly enough to accomplish these lofty goals.