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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

Recharge Wrap-up: Ford steals Best Green Brand spot from Toyota, EV buyer survey goes online

Chevrolet is one of the Top Global Green Brands of 2014, according to brand consultancy firm Interbrand. Chevy ranks number 32 on the list, which cover brands across a wide variety of segments. The report measures brand perception and brand performance, and the gap between the two is small for Chevrolet. "The company is not only actively demonstrating its environmental commitment," says Interbrand CEO Jez Frampton. "It's communicating those efforts in an authentic way that resonates with customers." Chevrolet cites its Spark EV, Volt and Cruze models as reason for its green cred. This is the first time Toyota didn't take the top spot. Being 32nd is good and all, but other automotive brands ranked much higher than the Bowtie. Ford, Toyota, Honda and Nissan took the top four spots in the report, respectively, with BMW, Volkswagen and Mercedes-Benz all besting Chevrolet. The big takeaway here is that Ford topped the list. In the Top Global Green Brand list's four-year history, this is the first time Toyota didn't take the top spot. Ford was second on the list last year, and 15th in 2012. "Ford embodies everything the business of the future must be: efficient, visionary, flexible, adept at problem-solving, cooperative, and focused on creating shared value," Interbrand says on its website. "From unveiling a first-of-its-kind solar-powered vehicle, the C-MAX Solar Energi Concept, to partnering with peers across sectors to do the seemingly impossible - like creating bio-plastic out of tomato fiber with Heinz-Ford is showing us what's possible." It bears mentioning that Ford's most recent MPG adjustments came after the study was conducted. Ford is also making the news for its 1.0-liter EcoBoost engine earning International Engine of the Year for the third straight year. Awarded Best Engine Under 1.0 Liter, the turbocharged three-cylinder motor earned high praise from judges. "This year's competition was the fiercest yet, but the 1.0-liter EcoBoost continues to stand out for all the right reasons – great refinement, surprising flexibility and excellent efficiency," said International Engine of the Year co-chairman Dean Slavnich. "The 1.0-liter EcoBoost engine is one of the finest examples of powertrain engineering." The 123-horsepower engine powers the Fiesta 1.0-liter EcoBoost, and will be available in a version of the Ford Focus in the US later this year. See more about the award in the press release, below.

These are the five most ridiculous attacks on the Chevy Volt [w/videos]

It's been a long, strange trip for the Chevy Volt from the time when the now-odd-looking concept version (above) was introduced at the 2007 Detroit Auto Show to today. And now, General Motors announced that the second-generation Chevy Volt will make an appearance at the 2015 Detroit show in January. This debut represents a victory for GM with what has easily become the most politicized car of the 21st Century. There are plenty of reasons for someone to criticize the Volt, but what's amazing is just how much anti-Volt energy has been spent not on things like the styling or how the EREV setup is not as efficient as a pure-EV powertrain. As we wait for more official information on the new Volt, we thought it would be fun to go back and look at some of the most wildly incorrect reporting and strangest attacks on the Volt from the archives. There is so much good stuff out there, it was hard to pare the list down, but these are our five favorites. Amazingly, they're not all clips from Fox News. Check 'em out below. 5. GM Is Going To Stop Making The Chevy Volt In The US Do you remember when GM was about to move Volt production to China? Well, yeah, this was reported back in early 2012 when a GM executive mentioned that the automaker would get benefits of building the Volt in the places where it sells them. This was spun into a story of GM taking Obama bailout money and then running to China. The Blaze was not happy: "Given the fact that Federal government helped itself to millions and millions of taxpayer dollars under the pretense that it was going to combat high unemployment by creating 'green jobs,' it would seem that moving research and development (and possibly manufacturing) overseas is slightly, well, counterproductive." Well, of course, that never happened. There's no way to say that GM will never build a version of the Volt in China, but the news we hear rumors of these days is that GM is going to move production of more Volt parts (specifically, the motors) to Michigan from overseas. 4. The Chevy Volt Is A Fire Trap There has never been a Volt that just spontaneously lit up while driving down the road. Yes, there were Volts that caught on fire. Yes, that's a scary thing. But there has never been a Volt that just spontaneously lit up while driving down the road. These were crashed test vehicles with destroyed batteries and plugged-in vehicles that were not the cause.