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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: EVs poll well in Portland, Tesla seeks office space

In a poll of drivers in Portland, more than 80 percent said they would be driving an EV in the next 10 years if they weren't already. The poll was small and not scientific, with just 218 votes cast, but it does reflect a slice of a certain population with changing attitudes toward electric mobility, and 80 percent is an impressive figure. Additionally, 43 percent of respondents planned to have an EV in the next five years, and only 18 percent said they prefer gasoline-powered vehicles. With EVs in many ways repeating the adoption process that hybrids went through a decade ago, the five- or ten-year timeframe for more widespread use seems only natural. Read more at the Portland Business Journal. San Francisco Mayor Ed Lee parks like an idiot, or rather, his security detail does. His Chevrolet Volt has been ticketed for parking six times since he took office. Granted, those street-sweeping signs are tough to keep track of, but his car has been photographed blocking at a bus stop while grabbing a burrito (who hasn't sinned in the name of a delicious burrito?), and was even caught parked in a crosswalk. The tickets were all dismissed. Read more from the SF Gate. Tesla is looking for office space in Silicon Valley. As the electric car company continues to search for a place to build its $4- to $5-billion battery Gigafactory, it also needs some real estate to expand its operations near its Palo Alto home. Tesla has expanded from 3,000 to 6,000 California-based employees since the end of 2012, and plans to add 500 more by the end of the year. It is currently looking for 200,000 to 300,000 square feet of office space close to its Fremont factory, according to sources in the real estate industry. Read more at the Silicon Valley Business Journal. Related Gallery 2014 Chevrolet Volt View 11 Photos News Source: Portland Business Journal, SF Gate, Silicon Valley Business JournalImage Credit: Paul Sakuma / AP Green Chevrolet Tesla Electric recharge wrapup portland silicon valley parking ticket

GM sees 'strong year' in 2018, then gold in Chevy Silverado for 2019

DETROIT — General Motors said on Tuesday it expects earnings in 2018 to be largely flat compared with 2017, but that profits should pick up pace in 2019 as its revamped line of high-margin pickup trucks hits the U.S. market. The 2018 earnings outlook was above market expectations, sending GM shares up more than 3 percent in premarket trading. "GM had a very good 2017 as we continued to transform our company to be more focused, resilient and profitable," GM Chief Executive Mary Barra said in a statement. "We are positioned for another strong year in 2018 and an even better one in 2019." GM and its Detroit rivals, Ford and Fiat Chrysler Automobiles, are bringing on new trucks at a time when overall U.S. new vehicle sales have been falling, but truck sales continue to grow as consumers abandon passenger cars in favor of pickups, SUVs and crossovers. GM on Saturday fired a new round in the battle for profits from one of the U.S. auto industry's most lucrative segments when it showed a new generation of its Chevrolet Silverado pickup truck at the Detroit auto show. The new Silverado, a highlight of the event, is the successor to GM's best-selling vehicle in North America. Sales of the current Silverado rose nearly 2 percent to 585,000 vehicles in 2017. In the coming months, the company will also reveal a revamped GMC Sierra pickup truck. U.S. new vehicle sales fell 2 percent in 2017 after hitting a record high in 2016, and are expected to drop further in 2018 as interest rates rise and more late-model used cars return to dealer lots to compete with new ones. GM said on Tuesday that while it retools a factory in Ft. Wayne, Indiana, to make the new pickup trucks, it will shift some production to an Oshawa, Ontario, plant in order to avoid missing sales in a hot market for the vehicles. The No. 1 U.S. automaker said it will record a $7 billion non-cash charge for its fourth-quarter 2017 earnings related to deferred tax assets. GM said it expects capital expenditure in 2018 of around $8.5 billion, about $1 billion of which will go toward funding self-driving car technology. Last week, the company said it is seeking U.S. government approval for a fully autonomous car — one without a steering wheel, brake pedal or accelerator pedal — to enter the automaker's first commercial ride-sharing fleet in 2019. GM said it expects 2017 earnings per share at the high end of its previously forecast range of $6 to $6.50.