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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

GM laying off more than 4,000 workers Monday morning

According to reports from Automotive News, The Detroit News, and CNN, General Motors plans to begin laying off more than 4,000 salaried workers starting Monday morning. In a statement to AN, a spokesperson for the automaker said, "We are not confirming timing. Our employees are our priority. We will communicate with them first." We've been expecting layoffs at General Motors since November, 2018. At the time, the Detroit-based automaker announced it would seek to shed 8,100 salaried employees, shut down five assembly plants in North America, and kill off several slow-selling models. One month earlier, GM offered buyout packages to 18,000 workers and said it would seek to cut its global workforce by 25 percent. A spokesperson said at the time the moves were "proactive steps to get ahead of the curve by accelerating our efforts to address overall business performance." The cost-cutting moves are expected to save GM up to $2.5 billion in 2019 and as much as $6 billion by 2020. David Kudla, CEO and chief investment strategist of Mainstay Capital Management, referred to the impending culling as "Black Monday" and told The Detroit News that the layoffs would begin around 7:30 a.m. and continue in waves throughout the coming days and weeks. GM plans to deliver on its fourth-quarter and full-year 2018 earnings report on Wednesday. President Donald Trump plans to deliver the annual State of the Union address a day earlier on Tuesday. We expect to hear plenty more from both sides over the next several days.

GM starting to talk seriously about 200-mile EV

We've been hearing word of a 200-mile EV from Chevrolet for a while now. First, there was General Motors then-CEO Dan Akerson hinting at a $30,000, 200-mile EV that would take the competition by surprise. Then Akerson confirmed that GM is working on a 200-mile EV in a speech in March. LG Chem, which supplies batteries to GM and other automakers, recently said it was working on batteries for EVs with a range of 200 miles. GM's head of global product development Mark Reuss just re-confirmed that there are plans for an EV with a 200-mile range, and sources have told Automotive News what that car will be. While Reuss didn't mention anything about a specific model or platform, two undisclosed sources with knowledge of GM's plans have said that an EV with a range of about 200 miles is indeed in the works, and that it will be based on the Chevrolet Sonic. The sources also gave a timeline for the car, saying it is slated for sometime in 2017. According to Reuss, the plan is for Chevy to offer a lineup of electric cars, with the 200-mile EV joining ranks of the Chevrolet Volt and the Spark EV. He didn't hint at a timeline, but if the sources are correct, we could see a Sonic EV being built within a few years. Reuss sees demand for it, too. When speaking of the Spark EV, currently only available in California and Oregon, he says that "people wish we would sell it all around the country." If he's right about that, it's not difficult to imagine people taking interest in Chevrolet's 200-mile electric car, whether or not it's a Sonic.