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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 Crimson Sport Edition is here for a limited run

The Cadillac ATS has been a well-received entry into the small sport sedan segment for General Motors' premium brand, but keeping the model fresh is an understandably high priority. A two-door coupe variant is on the way and should help keep interest up, but the line's volume leader is still expected to be the sedan. In order to keep awareness high and sales going, GM will need to lavish a little attention on its four-door, as well. That's where the Crimson Sport Edition comes in.
Crimson Red Metallic paint is the exterior highlight for this special-edition Cadillac, while the interior is complemented with a number of microsuede touchpoints, including the heated steering wheel and shifter. To this point, the car's rich burgundy finish has only been offered on CTS-V Coupe and Sport Wagon models, and brand spokesperson Donny Nordlicht tells Autoblog that this is the first time that the company has offered a microsuede wheel with heat. Four interior trims are also available, although all have been seen previously.
The Crimson Sport will be limited to production this spring, and the trimmings can be added to either the 2.0T Performance or the V6 Premium specifications. Both rear- and all-wheel drive will be available, as well. Prices start at $46,010 for the turbocharged model and $51,010 for the V6 including destination fees, which represents a premium of $2,990 for the extra equipment.

Cadillac: The standard of what?

Cadillac's tagline "Standard of the World" goes back to 1908 when it won the Dewar Trophy. While you might think that the moniker and the trophy have something to do with a feat of racing and daring-do against a cadre of British, French, and German marques, it's nothing of the sort. Rather, Cadillac achieved the trophy because of interchangeable parts. The parts they were producing back then were so well-made that Henry Leland, who established Cadillac, was able to disassemble three Model Ks, mix up the parts, and then put together three functioning cars. This amazed the Brits who handed him the trophy, and the "Standard of the World" was born. During the past several months, Cadillac has been producing news releases that would seem as though the company is the Standard of the World: "Cadillac Global Sales Rise 44.2 percent in January ... 18 percent in February ... 22.1 percent in March. . .40.9 percent in April ... 33.8 percent in May ... 7.2 percent in June." Like the Dewar Trophy being about manufacturing not performance, things are not necessarily what they seem. That is, Cadillac's growth is predicated on performance in China, not in the US. Through June, its China sales are 80,357 vehicles for the first five months of 2017, versus 72,073 in the US. The China number is a 75.4-percent year-over-year increase while the US number is a 1.6-percent decrease. For the entire globe, Cadillac has sold 164,174 vehicles. Of them, 65,250 were the XT5. That was followed by the ATS, at 34,277 units. In the US, the XT5 is doing reasonably well, as it has moved 29,798 units during the first six months. The ATS, conversely, is doing not particularly well, as it is down 26.2 percent with sales at just 7,209 for the year so far. To put that into some sort of context, know that Cadillac has sold 7,370 copies of the generally derided XTS, which is down 24.7 percent. The CTS is down 36 percent at 5,059 units, and the only other car in the lineup (we'll pretend that the ELR doesn't exist anymore and it shortly won't), the CT6 sedan, is up 172.7 percent – but they have sold only 5,397 CT6s. While Caddy talks a good game about competing with the likes of the BMW 5 Series and the Mercedes E-Class, know that those two sedans have been sold 17,036 and 20,783 times this year in the US respectively. So what is Cadillac chief Johan de Nysschen to do? According to Reuters, it is to cull the lineup.