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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

Mary Barra reportedly confirms GM's electric pickup truck plans

According to Motor Authority, CEO Mary Barra confirmed General Motors' intentions to build an electric pickup truck this week. Whether or not it would be an all-new vehicle is unknown. The news comes not even a week after Ford announced a $500 million investment in electric-vehicle startup Rivian. First, electric powertrains were integrated into cars. Then came the crossovers and the SUVs. Naturally, then, the next wave will be pickup trucks. Ford is set to produce an electric F-150, Rivian has the R1T, and now General Motors has reportedly confirmed its plans to introduce a competitor into the field. The article says the topic was brought up in a recent investor call as part of a brief overview of the automaker's electrification strategy. That's where the details end, however, as there is no indication of a timeline, what GM brand would carry the truck, or whether it would be an entirely new product or an adaptation of a current model. The latter seems most likely, which points to the Chevrolet Silverado or the GMC Sierra as possibilities. Chevrolet has been GM's electrification leader this decade with the Bolt and Volt, so an electric Silverado would align well with that messaging and branding. However, an electric pickup would likely be a pricier premium product, which could align it better with GMC. Autoblog has reached out to GM for comment and will update this space when we get a response. Green Rumormill Chevrolet GMC Truck Electric Future Vehicles Mary Barra electric truck chevrolet silverado

Corvette Stingray designer lists five goals of new exterior shape

Redesigning an icon is a difficult task, especially when you've got a blank sheet of paper in front of you and the all-new C7 Chevrolet Corvette Stingray is intended to be your final objective.
General Motors has released a new short video featuring Kirk Bennion of the Corvette's exterior design team, talking about the challenges of sculpting Chevrolet's new flagship sports car and the five goals the team had to keep in mind as it worked. In the end, Bennion's team had the pleasure of seeing their hard work take center stage as the Corvette captured the world's eyes at the Detroit Auto Show earlier this year.