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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 bids farewell to CTS-V Coupe with special edition

With the introduction of the latest Cadillac CTS, we knew it would only be a matter of time before a new CTS-V would come along. Now General Motors has revealed that the next CTS-V will arrive sometime next year, but before it does, the company is sending off the outgoing coupe with a special edition.
For 2015, the Cadillac CTS-V Coupe will come in a limited edition of 500 units decked out with a dark grille treatment, satin-finish wheels, red brake calipers and an upgraded cabin. The interior is decked out Recaro seats trimmed in black with red stitching, Midnight Sapele wood trim, metal pedals and a microsuede-trimmed steering wheel and shifter.
Buyers will be able to opt for white, gray or optional black exterior paint, an available sunroof and a six-speed transmission in either manual or automatic configuration. Of course, the 6.2-liter supercharged V8 comes standard with 556 horsepower, as does Magnetic Ride Control and brakes by Brembo. Pricing will be announced closer to launch, but in the mean time, you can read all there is to know by checking out the official release below.

Is Lincoln MKC cutting into Cadillac SRX sales?

The two big American luxury brands of Cadillac and Lincoln are on surprisingly similar paths at the moment with both divisions hoping to redefine themselves and grow popularity. They're still early in the process with no clear winner yet, but things might actually be looking up for Lincoln's latest model, according to a monthly sales analysis from The Motley Fool. It seems, at least early on, that the new MKC crossover might be taking a bite out of the Cadillac SRX's growth.
The MKC launched just a few months ago and has been getting a big marketing push from a series of oft-mocked ads starring the smooth-talking Matthew McConaughey. The luxury CUV has been the popular, new kid on the block with growing sales since its introduction. While smaller than the SRX, the Lincoln starts at a lower price and offers better fuel economy.
Through June, the SRX performed well with sales up over 20 percent on average through June, according to The Motley Fool. However, July and August saw things plummet with year-over-year drops of 7 percent and 37 percent, respectively. It still far outsold the MKC in terms of actual units in a given month, but the Caddy's continued growth has appeared to stagnate.