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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

This dream home theater and office happens to be in a Cadillac Escalade [w/video]

Need to take a ride cross country in the lap of luxury while still getting some work done? Short of a tour bus, the Concept One Curve from Lexani Motorcars might be one of the most comfy options imaginable. Lexani is usually known for creating opulent armored vehicles, but for the Concept One Curve it focuses on converting a 2015 Cadillac Escalade into a place for work or play. The company strips out the standard passenger compartment to install a higher ceiling with LED lighting, two leather-upholstered power captain's chairs and jump seats. However, the real highlight is a 48-inch curved 4K television mounted against the driver's partition. Don't worry about missing your favorite shows because there's a TracVision Satellite, too. The driver gets a re-covered seat of their own up front. If business needs to get done, the vehicle also includes a Mac Mini computer, tables stowed in the seats and connections for video conferencing. Of course, if you're riding in something this lavish, security might be a concern too. In addition to the window shades, the Concept One Curve features cameras to know what's going on outside. A touchscreen management system lets occupants control the whole setup from the luxurious chairs. Lexani claims that if all of this somehow isn't enough for a buyer, it offers even more options to fit their needs. Scroll down to watch a video tour and read more about this rolling home theater. {C} Lexani Concept One Curve Lexani Motorcars, a boutique luxury conversion company receiving vast international praise, has produced the Concept One Curve - the world's first 2015 Escalade with a built-in 48" 4K Technology Curved Smart TV. Lexani Motorcars is constantly pushing the boundaries of possibility for luxury transportation in everyday vehicles. The Curve is a revisited version of their latest model, the Concept One, with a television upgrade and electronic rear curtains; it is unmatched in its ability to be a premier theater one minute and a five-star mobile office the next. The curved smart TV-which rests on a proprietary electronic partition-is indeed impressive, but it is just one of the numerous amenities this discreet masterpiece boasts.

MIT puts V2V technology on its 2015 Top Ten list

Of all the technologies swimming around the automotive world, it is vehicle-to-vehicle communication that the Massachusetts Institute of Technology has fished out as one of its Ten Breakthrough Technologies of 2015. It joined emerging tech like brain organoids, supercharged photosynthesis, and Project Loon on the list, and got the nod over autonomous driving because, as the MIT Technology Review wrote, V2V communication "is likely to have a far bigger and more immediate effect on road safety." How so? Because actual cars transmitting data like their location, speed, steering angle, and state of braking to one another at least ten times per second provides a greater degree of awareness than sensor readings and algorithms. The US Department of Transportation and the National Highway Traffic Safety Administration have been working for years on standards and a regulatory schedule for introducing V2V to the marketplace, and Cadillac plans to incorporate V2V into at least one of its vehicles by 2017. Since we've begun the year with a number of stories of cars being hacked into, that got us wondering about the security of V2V communications. In a recent piece by our own Pete Bigelow on what motorists should know about getting their cars hacked into, he wrote that although cyber break-ins are extremely difficult, expensive, and time-consuming to do remotely, V2V is "one more conceivable avenue a hacker could use to impact multiple cars at a given time." So we spoke to Wilmington, Massachusetts-based Security Innovation about it. The automotive consultancy company has been working with the DOT since 2003 on V2V technology and the issues around it - namely security and privacy - and its chief scientist, William Whyte, is the technical editor of the Institute of Electrical and Electronics Engineers (IEEE) 1609.2 standard outlining its security protocols. Those protocols are expected to be finalized by the DOT toward the end of this year and then come into effect in 2016, and the company's Aerolink product is the security solution Cadillac will use. Whyte said, "If you hack into a car, V2V is the hardest place to start," and Pete Samson, the general manager of Security Innovation's automotive team, said "There are ten or 12 alternate attack surfaces" around the car that would make much easier targets.