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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

May 2016: FCA wins, Ford and GM stumble on weak car volumes

The May 2016 sales numbers are in, and it looks as though FCA is getting some vindication for boldly cancelling two slow-selling car models. Meanwhile, Ford saw overall sales dip and GM's May volume took a big dive versus the same month in 2015. While Marchionne's decision to axe the Chrysler 200 and Dodge Dart has drawn criticism as being short-sighted, it's working for FCA so far. Although the Dart and 200 aren't out of production yet and no capacity has been shifted to crossover or trucks, May's numbers show that the emphasis on Jeep and Ram models makes sense right now. FCA's US sales rose 1 percent last month compared to May 2015, putting the year-to-date total at 955,186 vehicles, an increase of 6 percent compared to the same period last year. Standouts included the Jeep Renegade, Compass, and Patriot, and the Fiat 500X. Ram pickup sales were down 3 percent. And your fun fact is that Alfa Romeo sales were up precisely 10 percent, for a total of 44 4Cs sold versus 40 in the same month last year. At FoMoCo, the Ford brand took a hit to the tune of 6.4 percent from May 2015 to 2016, registering 226,190 sales last month. Lincoln showed improvement on its modest numbers, going from 9,174 to 9,807, a 6.9 percent increase. Overall, Ford was down 5.9 percent for the month to 235,997; despite the slump, year-to-date total Ford sales are up 4.2 percent to 1,112,939. Strong sellers included Escape, Expedition, F-Series, and Transit - big stuff. Most small and/or efficient models (Fiesta, Focus, Fusion, C-Max) saw sales slides. Fusion sales were also down, likely due to effects of model changeover to the freshened 2017 model. Ford has promised four new crossovers and SUVs by 2020 and if things keep trending this way the company will be able to sell them, but things could change in the next four years. GM saw the worst of it for domestic brands. Retail and fleet sales were down for each of the four divisions, with the May 2016 total dropping 18 percent to 240,450 vehicles. GM's year-to-date sales are down 5.0 percent in 2016 to 1,183,705. Both the Sierra and Silverado were down significantly, and the majority of Chevy, Buick, GMC, and Cadillac nameplates saw sales decreases, with both small cars and larger utilities included. Not even big stuff could help GM this month, it seems. We'll have more on the rest of the industry's May sales as those figures trickle in.

2020 Cadillac CT5 pricing is out, and it's cheaper than the Germans

We know pretty much everything there is to know about the 2020 Cadillac CT5 sport sedan, and today Cadillac tells us its price. Cadillac isn’t giving us everything, though: all we get for now is pricing for the four-cylinder models. The cheapest CT5 youÂ’ll be able to lay your hands on starts at $37,890. That chunk of change nets you a CT5 Luxury with rear-wheel drive. The base four-cylinder is a 2.0-liter turbocharged engine making 237 horsepower and 258 pound-feet of torque. If we peruse current Cadillac CTS and ATS pricing, this puts the CT5 under even the base price for a 2019 ATS. The current CTS is way above the CT5, starting at just under $48,000. So in comparison to the cars itÂ’s half replacing, the CT5 price already looks much more attractive. Cadillac has two trim upgrades from the base Luxury trim. A CT5 Premium Luxury will run you $41,690, while the Sport is an even pricier $42,690. You get some additional features for your money, with the Sport being more performance-oriented for those wanting it. All CT5 Sports will be equipped with upgraded Brembo brakes, different 19-inch wheels, sport seats, sport steering wheel with magnesium paddle shifters and unique trim inside and out to differentiate itself from the Luxury.  All-wheel drive is also available for any of the trim levels. In Sport and Luxury trims, all-wheel drive is a $2,600 premium, but youÂ’ll have to fork out $3,090 more in the Premium Luxury trim to get power going to all four wheels. Cadillac says the Cold Climate Package is included automatically with all-wheel drive, and that includes heated front seats plus a heated steering wheel. The base price for the CT5 undercuts the base price of others in its segment like the new 3 Series ($41,245), A4 ($40,195) and C-Class ($41,400). It falls short of beating the Genesis G70 out, though, as that fantastic little car starts at $35,895. WeÂ’ll note that the CT5 is slightly larger than all of these vehicles, but close enough that folks should be cross-shopping them. As of today, we can safely say the CT5 is looking like a solid value versus its competition. WeÂ’ll see how our thoughts evolve after driving it for the first time, and after pricing for the V6 rolls in.