1979 Cadillac Seville Base Sedan 4-door 5.7l on 2040-cars

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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 Escala Concept shows off a softer side of American luxury

When Cadillac announced that it would be appearing at Monterey Car Week with a stunning, new concept, the news sent a rush of blood to the head. Would it be a CT6 Coupe? A new V-series model? A follow-up to the show-stopping Elmiraj? Tonight, at the beginning of a weekend of festivities to tantalize automotive enthusiasts and aficionados, Cadillac instead showed off a glimpse of reality: the Escala four-door coupe concept. It wasn't behind a flat-white background, but at a futuristic yet modern home nestled in the hills that Cadillac president Johan De Nysschen introduced the Escala as a "point of inflection" for the brand. Keen observers will note that "Escala" is nearly "Escalade," but any similarity between the two vehicles ends there. De Nysschen noted that the four-door is meant to "relentlessly drive this brand back to its place at the pinnacle of premium." "Nothing less will do," de Nysschen said. The Escala is neither as bold as some recent Cadillacs to take the stage, nor as brash. From a distance, it has a wide, muscular stance wrapped in a tailored suit. Up close, it almost resembles a four-door Camaro — perhaps a nod to the work of former Holden design chief and incoming General Motors director of design, Michael Simcoe. De Nysschen described the Escala project as an "opportunity for designers to flex their creative muscle." The Escala seems to have a footprint mirroring that of a Mercedes-Benz CLS-Class, but it feels wider and smaller at the same time. Is the shape derivative? Perhaps, but the Escala's design is less a reflection of a future, incognito Cadillac, and more of a chance for the brand to show off the details that might soon become icons. The Escala's shape may not be earth-shatteringly different, but the truth is in its details. The mirrors are as thin as designer spectacles. The C-pillar offers an opportunity to show off Cadillac's latest take on the Hoffmeister kink. A glass roof adds visual airiness. And a simple "GM DESIGN" badge sits below the side doors, in deference to the stylists who labored to make the Escala different. The most defining element of the concept is the way it utilizes light. There isn't anything blinding about its lighting, but that means you can focus on the shape and appreciate the ambience. The depth of the LED tail lights adds visual length to the Escala and shows where Cadillac's designers placed the most importance. It's contrast and beauty at once.

Cadillac shows dealers convertible rendering

Cadillac is getting serious about revitalizing and expanding its lineup, and to that end, a new report claims that brand boss Johan de Nysschen has been showing plans for several new models to the marque's dealer body - among them, a new convertible.
The droptop which Cadillac reportedly showed its dealers in sketch form, would be based on the same platform as the ATS and CTS, those it's unclear to which (if either) of those model lines the new convertible would be added, or whether the design features a canvas or folding hardtop roof. One way or another, it would be the first time Cadillac would offer a convertible since the Corvette-based XLR roadster was discontinued more than five years ago.
Quoting an unnamed brand spokesperson, Cadillac would "like to introduce an open car to the portfolio at some point," however, "it's not likely to be one of the near-term portfolio additions."