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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 ATS to go racing in 2015 as CTS.V.R replacement

Cadillac has been racking up victories with the CTS.V.R in Pirelli World Challenge racing for two model generations now, including recent GT class championships in 2012 and 2013. However, even winning racers eventually have to retire, and it looks like the CTS may be taking a bow at the end of the season. In its place, Caddy is reportedly working on a new racecar based on the ATS Coupe, and it might even get to compete internationally.
According to Racer, Pratt & Miller Engineering is leading the development and is already lapping the ATS racecar in Michigan for testing. It reportedly drops the CTS' V8 in favor of a twin-turbocharged V6 powering the rear wheels. Since this is the same team behind the hugely successful Corvette Racing program and the current CTS.V.R, the latest car appears to be in good hands.
The new model would also adhere to GT3 rules, according to Racer, and that might signal a big change for Cadillac's motorsports program. It means that the ATS could be sold to teams in the numerous series around the world that accept these vehicles. That would broaden the luxury coupe's exposure and put it up against GT3 racecars from premium brands, like Bentley, Porsche and McLaren. If it wins, the change could be a marketing bonanza for the brand.

Cadillac prices new ATS-V from $61,460*

It's official, Art & Science students: Cadillac has opened the order books for the new ATS-V, and while it was at it, has told us how much we should expect to shell out for the privilege. Pricing starts at $61,460 for the 2016 Cadillac ATS-V sedan (*plus tax, title, license, dealer fees and any optional equipment). Go for the sleeker (but less practical) ATS-V coupe and you'll be looking at $63,660 (with the same conditions). For all that scratch, you'll be looking at a 3.6-liter twin-turbo V6 driving 455 horsepower and 445 pound-feet of torque through a six-speed manual or eight-speed automatic transmission, for a 0-60 time of 3.9 seconds and a top speed of 189 miles per hour. The ATS-V also features Brembo brakes, magnetorheological dampers, launch control and rev-matching with no-lift shifting. Cadillac has still yet to tell us how much gas its new performance model will guzzle, but it's got time before production gears up in the spring and the online configuration tool launches in April. Cadillac Opens Ordering for 2016 ATS-V Dual-purpose performance luxury compact designed for the track, touring 2015-02-10 DETROIT – Cadillac dealers have begun accepting orders for the 2016 ATS-V – the brand's inaugural luxury compact performance car starting production this spring. Available in sedan and coupe forms, the twin-turbocharged ATS-V offers a dual-purpose luxury performance experience: a car with true track capability straight from the factory with sophisticated road manners. Powered by the segment's highest-output six-cylinder engine – the Cadillac Twin Turbo rated at 455 horsepower (339 kW) and 445 lb-ft of torque (603 Nm) – the ATS-V achieves 0-60 performance in 3.9 seconds and a top speed of 189 mph. The Cadillac Twin Turbo engine is backed by a six-speed manual – with Active Rev Match, no-lift shifting and launch control – or a paddle-shift eight-speed automatic transmission featuring launch control and Performance Algorithm Shift. "The V-Series is the ultimate expression of Cadillac's re-ignited product substance and the passion at the core of our brand," said Johan de Nysschen, Cadillac president. "The ATS-V expands the V-Series lineup, bringing a new kind of performance character to Cadillac. Lightweight, agile and potent, the ATS-V will make an ideal pairing with the larger and even more powerful all-new 2016 CTS-V midsize sedan, which arrives later this summer," he said.