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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 CT6 hits dealers in March for $54,490

When the Cadillac CT6 hits dealerships in March of 2016, it will carry a starting price of $54,490 (including a $995 destination charge). That strikes us as a reasonable asking price. For some context, the CTS, which sits a rung down the size and pricing ladder at Cadillac, starts at $46,555. A BMW 5 Series sedan begins its pricing journey at a bit over $50,000 while the larger 7 Series commands a bare minimum of $82,000. So, while the Cadillac's range-topping CT6 isn't exactly a 5 Series or 7 Series competitor, its pricing strategy seems to reflect an interesting position in the luxury-car playing field. For that $55,000-ish asking price, the CT6 comes equipped with a 2.0-liter turbocharged four-cylinder engine that pushes 272 horsepower to the rear wheels. When equipped with a 335-horsepower, 3.6-liter V6 engine and all-wheel drive, the CT6 nudges up just slightly to $56,490. Again, that's a reasonable $2,000 surcharge for more power and four driven wheels. Continuing up the CT6 structure brings us to the 400-horsepower, twin-turbo, 3.0-liter V6 for $65,390 that also comes with all-wheel drive. All models come with an eight-speed automatic transmission. At the very top of the pricing scale sits the CT6 Platinum, which carries a MSRP of $84,460. As noted earlier, that puts the tip of Cadillac's CT6 spear just into the starting territory of BMW's biggest luxury sedan. A plug-in hybrid model is promised that will offer 335 horsepower and 432 pound-feet of torque with double the fuel efficiency of a comparable non-hybrid CT6, but Cadillac hasn't yet announced pricing for that model. We're eager to find out exactly where the CT6 lands on the scale of high-end luxury cars in America. One thing is for certain, though: Cadillac is clearly trying pique the interest of German cross-shoppers with its top-level offering. Check out the press release below for more details from the automaker about its so-called Cadillac Touring 6 Sedan. Related Video: 2016 Cadillac CT6 Range-Topping Sedan Slated for March Launch NEW RANGE INCLUDES CT6 STARTING AT $53,495; CT6 PLATINUM PRICED FROM $83,465 2015-11-02 Cadillac extends the top of its range with the 2016 Cadillac Touring 6 sedan, which begins production in Detroit in January, with initial shipments to dealers in March. Through the integration of new technologies, the first-ever Cadillac CT6 creates a new formula for the range-topping sedan and substantially expands the Cadillac portfolio.

Cadillac Escalade gets $10,000 discount to ward off Navigator

Cadillac is once again defending its full-size luxury Escalade SUV from assault by the hot-selling Lincoln Navigator, offering $10,000 discounts to some current customers to keep them from switching brands. The discount, reported by Bloomberg, applies to lessees of 2016 model-year Escalades, with a $7,500 discount offered to owners, through May 31. It's at least the second time GM has resorted to incentives to keep customers in its cash-cow luxury SUV since Ford launched the all-new 2018 Navigator late last year. In November, Cadillac offered a $5,000 discount on the purchase or lease of the Escalade to any buyer who traded in a 1999 or newer Lincoln model. Analysts have estimated that the Escalade produces nearly $1 billion in yearly profit for GM. Escalade sales were up 14 percent in March and 8 percent during the first quarter, with retail sales up by double-digit percentages in both periods, higher transaction prices and market share expected to climb by 2 percent year-to-date, according to GM. That's impressive for a vehicle that has received only minor updates since the current generation went on sale for 2015. While it still trails the Escalade in sales, the Navigator has been riding a 63 percent increase in deliveries this year, with new models lasting on dealer lots an average of only 10 days and average prices ballooning to $82,500, according to Bloomberg. Ford earlier this year announced it was pouring $25 million into its Kentucky Truck Plant in Louisville to boost production of the Navigator and Ford Expedition. You can read Autoblog's side-by-side comparison of the 2018 Escalade and Navigator with competitors including the Lexus LX 570 and Infiniti QX80. Related Video: Image Credit: Cadillac Cadillac SUV Luxury sales incentives lincoln navigator sport utility vehicle discount