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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

Chevy admits there's confusion over Bolt and Volt names

Offering the possibility of 200 miles of driving range and the potential for a price of about $30,000, the Chevrolet Bolt is an incredibly enticing vehicle, and it has an opportunity to be a big player in the EV world. However, the hatchback has been plagued by one problem since the moment it debuted – the name. Bolt sounds very similar to Volt, Chevy's extended-range plug-in, and they can be easy to confuse in a conversation. That's not the best quality to have when trying to get a new vehicle's name out there among customers, and General Motors North America president Alan Batey told the Detroit Free Press that the company is aware of the problem. While the EV is definitely going into production, the model might be wearing a different moniker when it hits showrooms. "We're still in the decision phase. It could go either way," Batey said to the Free Press. He indicated the automaker still has about a year before a final decision is necessary. The Bolt will be built at GM's Orion Assembly plant in Michigan and will likely go on sale around 2017. That will put the Chevy on the market at roughly the same time as the 200-mile Tesla Model 3. Batey didn't seem too concerned, though. "Unlike Tesla, we can spread the cost over a whole lineup," he said to the Free Press. The future doesn't look quite so bright for the Spark EV, though. Batey suggested that it might not last once the longer-range Bolt fills that niche in the lineup. Related Video:

Chevy to reveal new Spark in Seoul and New York

Chevy is preparing to roll out an all-new Spark next month, giving us a taste of things to come with the teaser image above. The new Spark is set to debut simultaneously at car shows in Seoul and in New York on April 2, joining the new Malibu that will also mark its debut at the Manhattan expo. Why introduce the new Spark at the same time in South Korea and in the US, you ask? Probably because those are the two biggest markets for Chevy's smallest car, accounting for the lion's share of the 1.1 million units sold in 71 markets around the world since its introduction in 2009. Chevy hasn't revealed much about the new Spark, except to say that its styling will be more sophisticated than the "youthful whimsy" of the current model. A Spark of Sophistication Chevrolet's redesigned global minicar to debut in Seoul and New York on April 2 2015-03-09 DETROIT – The all-new 2016 Spark will debut on April 2 at the Seoul and New York auto shows, Chevrolet announced today. A sleeker, more aerodynamic profile and a progressive take on Chevrolet's signature design cues will give the redesigned Spark a more sophisticated aesthetic that reflects the changing tastes of the global minicar market. "The new Spark's design has evolved and grown up with the segment," said Michael Simcoe, GM International vice president of Design. "The youthful whimsy of the original Spark is still in its genes, but it is conveyed in more traditional proportions that reinforce the customer's refined expectations." Chevrolet has sold more than 1.1 million Sparks around the world since it went on sale as the Beat in India in late 2009. Today, the Spark is available in 71 markets worldwide, selling the most in South Korea, followed by the United States and Mexico. Spark is attracting younger and first-time car buyers to Chevrolet with 26 percent being under the age of 35. Sales of the Spark in the U.S. are up 32 percent in the first two months of 2015 versus the same period in 2014. Founded in 1911 in Detroit, Chevrolet is now one of the world's largest car brands, doing business in more than 115 countries and around 4.8 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature engaging performance, design that makes the heart beat, passive and active safety features and easy-to-use technology, all at a value. More information on Chevrolet models can be found at www.chevrolet.com.