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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 sales chief fired over policy violation

Amidst a good year for Cadillac, which is experiencing higher sales gains than any other US brand this year, the US sales chief has been fired over a policy violation, Automotive News reports.
The sales chief, Chase Hawkins, "has left effective immediately," GM spokesman David Caldwell told Automotive News. Caldwell went on to say that Hawkins' replacement would be chosen soon.
Hawkins became the US sales chief in June 2012, and before that was the regional sales director for Cadillac in the Northeast US, overseeing 168 dealerships.

Weekly Recap: Ford GT inspires guitar, foosball table, sailboat

Ford design vice president Moray Callum had just wrapped up a briefing on the interior of the Ford GT last month, but something seemed out of place. He grinned and pointed behind him, "You might be wondering why I have a boat behind me," he said mischievously. It was there because Ford set its designers on a mission to stretch and showcase their talents: design non-automotive objects inspired by the interior of the GT supercar. Callum received quite a response, too. His team produced a guitar, a foosball table (yeah bro!), a racing sailboat, a Wi-Fi speaker and some furniture. As the veteran design chief explained, "It's a really great exercise both to highlight our designers' talents, but also to really see how our design philosophy can work and how you can use it and get a common response back from a worldwide design team." Guitar View 25 Photos The objects have been on display this week at the Salone del Mobile furniture and fashion design fair in Milan, Italy, where Ford has had a presence for three years. There's also a light exhibition that apparently was inspired by the GT, as well. While this might seem a little far-fetched for the automaker, Ford said exhibitions like the Salone del Mobile give its designers another way to be creative and ultimately produce striking interior style. Ford wants this to be a differentiator, as research shows consumers are placing emphasis on the layout and features inside when they're making a decision about buying a new car. It's a little light hearted – but it's also potentially big business. Other News & Notes Cadillac CT6 platform could be used for Buick General Motors product chief Mark Reuss said the Cadillac CT6 platform could be used for a large Buick, though "not yet," Automotive News reported. The underpinnings can accommodate rear-wheel or all-wheel drive and would give Buick the large flagship it lacks. The report jibes with comments Reuss made at a roundtable with Autoblog and other reporters at the New York Auto Show. When asked if Buick had space for a large car on the CT6 chassis, he replied, "Yeah, I think it does. Yeah, I think we do." Buick has revamped its lineup in recent years with attractive crossovers and small and midsize sedans, but hasn't added the proverbial flagship that's yearned for by enthusiasts. Buick surprised industry observers with the stylish Avenir concept at the Detroit Auto Show earlier this year that raised the possibility of a halo sedan.