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2015 Cadillac Escalade

Cadillac has been an interesting story in the auto industry over the past several years. Its comeback bid may be well over a decade old, but it's only recently that the Wreath and Crest has transformed from the auto industry's retirement home into its hot new thing. Today's Cadillac is a powerful marque working to instill passionate design, sound driving dynamics and cutting-edge technology into each model it builds, with vehicles like the ATS and redesigned CTS leading the charge.
Now, its latest model has arrived. This fourth-generation Escalade is among the most important new Cadillacs since the division's renaissance kicked into high gear. It's the brand's de facto flagship, and the first vehicle many young people think of when hearing the name "Cadillac." In the past, the Escalade was the chosen vehicle of the rich, flashy and famous. It's suffered over the past few years, though, particularly as new and more luxurious competitors have come to the fore.
With this latest redesign, General Motors is aiming to retake the spotlight as purveyors of the market's premier luxury SUV. To find out if it's been successful, I ventured down to the South Carolina Lowcountry to test the all-new 2015 Escalade.

Weekly Recap: Auto execs face life in prison for recall delays under proposed legislation

The stiff punishments are part of broader transportation legislation, but clearly McCaskill has automakers in her sights.
Missouri Senator Claire McCaskill threw down the gauntlet this week, proposing a bill that could send auto executives to prison for life if they were found to have delayed a recall. She also wants to eliminate the limit for fines for auto safety violations, which are currently capped at $35 million.

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