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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

Cadillac XT4 crossover to be built in Kansas City

Cadillac's upcoming XT4, a crossover we've previously known as the XT3 in a long series of spy shots of heavily camouflaged mules, will be built at General Motors' assembly plant in Kansas City on the same platform as the Chevrolet Malibu, Bloomberg reports, citing people familiar with the plan. That will give Cadillac another entry in the red-hot luxury crossover segment and, GM hopes, help to reverse a sales slump in the U.S. It'll also breath life into the Kansas City plant that makes the slow-selling Malibu, where GM cut a third shift last year, by sharing the assembly line between the crossover and sedan and defraying costs for each vehicle. The XT4 was known most recently as the XT3, with styling cues based on the Escala concept sedan from 2016. It's slightly smaller than the XT5, Cadillac's top-selling vehicle, and will also augment the full-size Escalade in Cadillac's stable of SUVs when it makes its expected debut later this year. Cadillac last week reported its second-highest-ever sales mark with 356,467 vehicles, an increase of 15.5 percent over 2016. But that mark papers over an 8 percent sales decline in the U.S. to 156,440 vehicles. The luxury brand is on a hot streak in China, where sales jumped 50.8 percent last year to 175,489 units.Related Video: Image Credit: Brian Williams Plants/Manufacturing Cadillac Chevrolet GM Crossover sales cadillac xt5 cadillac xt4 cadillac xt3

2016 Chevy COPO Camaro wears drag to SEMA [w/video]

Attendees to this year's SEMA Show get to be the first to check out Chevrolet's latest COPO Camaro that's now based on the new, sixth-generation model. As before, they packs a bevy of racing modifications to rocket down drag strips across the country. All of the interested customers might not get one of these hand-built machines, though, because Chevy is sticking with the tradition of only building 69 of them for 2016. Devised to compete NHRA Stock and Super Stock Eliminator classes, the latest COPO Camaro features the lighter, more rigid platform of the sixth-gen model. Buyers can choose from an array of V8s for power, including a supercharged 350-cubic-inch engine, a naturally aspirated 427, or an LT-based 376. All of them come with a race-prepped Turbo 400 three-speed automatic, solid rear axle, and adjustable suspension. The COPO on display for SEMA wears custom styling from drag racer Courtney Force that combines a Red Hot and black color scheme with her name slashing across rear fender. This one also packs a concept 350-cubic-inch V8 with a 2.9-liter Whipple supercharger. If you're interested in owning it, the car will cross the auction block at a Barrett-Jackson sale in 2016, and the proceeds will go to the United Way. Related Video: CHEVROLET INTRODUCES GEN SIX COPO CAMARO Courtney Force-designed show car to be auctioned for United Way LAS VEGAS – With assistance from NHRA Camaro Funny Car driver Courtney Force, Chevrolet introduced the Gen Six COPO Camaro today at the SEMA Show. After visiting the COPO build center, Force collaborated with Chevrolet designers to create a custom appearance for the 2016 COPO Camaro SEMA show car. It will be auctioned at a Barrett-Jackson sale in 2016, with the proceeds going to United Way. Chevrolet will build 69 COPO Camaro race cars for 2016, extending the production legacy that began in 2012 with the fifth-generation Camaro. Like the previous editions, the new COPO Camaro is designed for NHRA's Stock and Super Stock Eliminator classes. "With the new Gen Six Camaro as its foundation, the 2016 COPO Camaro begins the next chapter of an historic racing legacy," said Jim Campbell, Chevrolet U.S. vice president of Performance Vehicles and Motorsports. "It's great to have Courtney Force on Team Chevy and to work with her on the design of the new COPO Camaro show car.