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Cadillac Escala Concept | Autoblog Minute

Cadillac showed off its Escala concept at Montery Car Week. The Cadillac Escala is four door sedan with a 4.2L twin-turbo V8 under the hood.

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 president reveals XTS sedan refresh, flagship vehicle plans

Update: The second paragraphed has been changed from the original text to make it clear that de Nysschen, not Autoblog , claimed the report by The Detroit Bureau is inaccurate. Cadillac has been on a tear ever since the automaker poached Johan de Nysschen from Infiniti, becoming a more profitable automaker while delving deeper into the luxury market. While some reports indicate that Cadillac may be limiting its lineup, de Nysschen just put everything out in the open. In the comment section of an article by The Detroit Bureau that claimed Cadillac would cut its lineup down, de Nysschen stated the report was inaccurate and outlined the automaker's future. The Cadillac CEO wrote "Some of what you report is correct, some incorrect, most is conjecture." A Cadillac spokesperson confirmed that de Nysschen did write the comment, but did not comment on any of the details. The Detroit Bureau's Paul Eisenstein told Autoblog that he stands behind the information in the report. In any case the most interesting tidbit in de Nysschen's comment is the major refresh for the Cadillac XTS. The news directly contradicts previous reports that indicated the XTS would be killed off by 2019. In Cadillac's pursuit to add some space between it and GM, the XTS was expected to get the axe in favor of more profitable vehicles. The sedan, which was introduced in 2012, shares its underpinnings with the latest generation of the Chevrolet Impala. To the contrary, Nysschen stated that "We ARE planning a major refresh for XTS." What the major refresh will bring the aging sedan is still a mystery, but the vehicle isn't dying. The move to keep the XTS in its lineup is a bit of a surprise as Cadillac has filled its lineup with track-oriented sports cars, rear-wheel-drive sedans, and extravagant crossovers. The boat-like XTS with its front-wheel-drive layout and available all-wheel-drive system sticks out like a sore thumb, even if it were to receive a major overhaul. The only real explanation is that Cadillac hopes the vehicle will still appeal to its old-school customers that are unwilling to compromise interior space and ride quality. In our most recent review of the XTS, we thought the luxurious sedan was a great long-distance cruiser, but not a talented sports car – no surprises there. It's unlikely that Cadillac will focus on driving pleasure with the refreshed XTS, focusing instead on pure comfort and luxury.