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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

What are the odds an actual Cadillac EV looks anything like this?

The Cadillac EV concept sure looks neat. It's all-electric, too, which is even neater. Unfortunately, it's a concept car, and when it comes to concept cars with Cadillac badges on them, it's best not to get too excited. For instance, you might recall this exquisite piece of automotive art. It was called the Elmiraj. You might recall the production version became the bold face of a new Cadillac and inspired a renaissance for the brand. Jay-Z drives one. Oh wait, no he doesn't. It was never made, nor was anything like it made. This is the Cadillac Escala. It has certainly inspired design cues on production Cadillacs, most notably the just-revealed XT6. However, besides those cues, it's a pretty anonymous large crossover. Hardly anything as stunning as the Escala. Now, perhaps the CT5 will be a dead-ringer, but we wouldn't get our hopes up. Then there's this, the Ciel. Not to be confused with an Acura CL, it was 100 feet long, a convertible and purple. This was also not made. OK, we can see why. And finally, this is the Cadillac Sixteen. As the name suggests, it had 16 cylinders. That's a lot. The most you can get in a Cadillac today is half that many. Now, to be fair, most manufacturers produce concept cars that have zero chance of production. They are meant to serve as inspiration for future designs, showcase future technologies or just draw attention to the brand. The problem with the Cadillac concepts is that they're not that fanciful. Those aren't pod-like Jetsons cars up there. They aren't this nonsense. They look like modern interpretations of the exact sort of grandiose cars Cadillac used to make. The very cars that made Cadillac the "Cadillac of the World." You know, like this. I'm not talking about literal tail fins and pink paint, but that's a CADILLAC. It's confident. It's its own thing. It doesn't need to beat BMW around the Nurburgring to prove something to someone somewhere. The Elmiraj was also a CADILLAC. The XT6 literally wears a Cadillac badge, but it could be anything. By contrast, Lincoln is doing a much better job of tapping into the spirit of its grand past with the Navigator, Aviator and suicide-doored Continental. Nowhere is that better seen than in the cabins of the XT6 and Aviator. One is swank. The other is not. But back to where we started: that EV concept. You'll note that it doesn't actually have a name.

Safety group pans GM’s new Marketplace in-dash shopping

When it comes to our cars, is the Internet of Things a godsend? Or a hidden menace that will create more problems than it will solve? On the same day General Motors announced it will equip newer-model cars with its in-dash Marketplace e-commerce app, a prominent safety group was shooting it down. National Safety Council President Deborah Hersman tells Bloomberg the technology will only contribute to distracted driving and hurt efforts to stem the tide of rising auto fatalities, which grew 5.6 percent to more than 37,000 in the U.S. in 2016. The National Highway Traffic Safety Administration says distracted driving was responsible for 3,477 fatalities and 391,000 injuries in 2015, the most recent year for which it has data. "There's nothing about this that's safe," Hersman told Bloomberg. "If this is why they want WiFi in the car, we're going to see fatality numbers go up even higher than they are now." Marketplace, developed with IBM, will allow drivers — or more often, one hopes, their passengers — to order coffee or food, find gas stations and reserve hotel rooms from their dashboard screens. The technology is set to be uploaded automatically to nearly 1.9 million GM vehicles model-year 2017 and later that are equipped with WiFi hotspots and compatible systems. By the end of 2018, about 4 million Chevrolet, Buick, GMC and Cadillac vehicles will be equipped with Marketplace. The app will debut with a limited number of participating retailers, including TGI Fridays, Shell, Exxon Mobil and Starbucks, with more likely to join later. Online retail giant Amazon is also partnering with automakers such as Ford to bring e-commerce capabilities inside the car through its Alexa personal assistant. While convenience is nice, one other thing is becoming clear as the IoT wedges its way into our cars: It's taking aim at some decidedly first-world problems.Related Video: Image Credit: GM Buick Cadillac Chevrolet GM GMC Technology Infotainment in-car entertainment marketplace e-commerce