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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 prices new XT5 from $39,990

Keen to put your deposit down for a new Cadillac XT5, but waiting to find out how much you'll need to set aside? Well the wait is over, friend, as Cadillac has announced pricing for the new crossover. US pricing starts at $38,995, which works out to $39,990 once you factor in the standard $995 destination charge. That's only $1,390 more than the now wreathless brand charged for the outgoing SRX, which the new XT5 replaces and which carried a starting price of $38,600 (delivered). It also undercuts the competition from most other luxury automakers. The BMW X3 ($40,495), Audi Q5 ($40,900), Lexus RX 350 ($42,850), and Infiniti QX70 ($45,850) each start at a higher base price than the Caddy. However the Mercedes GLE stats marginally lower at $39,875, and the Lincoln MKX goes for significantly less at $37,935 – all prices including destination charges. Of course, that starting price is just for the base model with front-wheel drive. All-wheel drive is optional on Luxury and Premium models, but comes standard on the top-spec Platinum. Step that far up the ladder, though, and you'll be looking at $63,495 (delivered). Related Video: New 2017 Cadillac XT5 Crossover Arrives in April 2017 XT5 CROSSOVER PRICED FROM $38,995 IN THE U.S. 2016-02-10 The first-ever Cadillac XT5 will arrive in U.S. dealerships in early-April, continuing the brand's product-driven growth. XT5 enters the strongest category in the luxury automotive space, the midsize luxury crossover segment, where Cadillac set sales records in 2015. "The arrival of this sophisticated new crossover positions Cadillac well, as XT5 enters the most popular segment in the global luxury market," said Cadillac President Johan de Nysschen. "It's pivotal to our ongoing growth, which is why we've developed XT5 from the inside out to provide customers more space, more technology, more luxury and more efficiency." The XT5 is the first in a series of upcoming luxury crossovers carrying the "XT" designation, a key aspect of the brand's product-driven global growth plan. The new luxury crossover joins Cadillac's lineup immediately following the new range-topping CT6 Sedan, as the brand enters a new phase of product growth. The XT5 is the next chapter in elevating the Cadillac brand: it is bold, distinctive and sophisticated with enhanced driving dynamics. This new crossover perfectly reflects Cadillac's positioning in the luxury automotive marketplace, de Nysschen said.

2014 Cadillac XTS Vsport

Not long after bombing around the Milford Road Course in the new CTS Vsport, Cadillac invited me to try out its other new-for-2014 Vsport model: the XTS. And despite using the same twin-turbocharged 3.6-liter V6 from the CTS, the Vsport package takes on a whole new meaning here in Cadillac's softer flagship.
In the CTS, this trim perfectly bridges the gap between the standard models and the hardcore CTS-V, and is focused on being the best-driving version of the range without a standalone V badge. The XTS, however, has no proper V model, so the Vsport becomes the new range-topper for that line by default. But unlike the CTS Vsport, which uses rear-wheel-drive architecture and is focused on driving dynamics above all, the XTS is geared toward a much different customer.
The entire XTS experience is far more concerned with plush comfort than handling prowess, and while this Vsport model certainly ups the ante with more power and some mild suspension and steering tweaks, it's not exactly what we'd call a particularly engaging experience. But that doesn't mean it isn't good.