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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

Chrysler, Nissan looking into claim that their cars are industry's most hackable

A pair of cyber security experts have awarded the ignominious title of most hackable vehicles on American roads to the 2014 Jeep Cherokee, 2014 Infiniti Q50 and 2015 Cadillac Escalade.
Charlie Miller and Chris Valasek are set to release a report at the Black Hat hacking conference in Las Vegas, Automotive News reports. The two men found the Jeep, Caddy and Q50 were easiest to hack based not on actual tests with the vehicles, but a detailed analysis of systems like Bluetooth and wireless internet access - basically, anything that'd allow a hacker to remotely gain access to the vehicle's systems.
Considering this lack of hands-on testing, the pair acknowledge that "most hackable" could be a relative term - they point out that the vehicles may actually be quite secure.

The Beast 2.0: What the 2016 presidential election winner will ride in

The current presidential limousine, which is referred to as "The Beast," will be altered for the next President of the United States. Our photographers managed to capture the vehicle testing. " The Beast 2.0" will follow closely behind the current presidential limousine that's built upon a rugged commercial truck chassis and has a sedan-like body. Instead of wearing styling details from the now-retired Cadillac STS, the new presidential limo appears to borrow looks from the latest Escalade and the CT6 sedan. The bomb-proof prototype is wearing LED headlights, has a more angular grille that features Cadillac's wreathless crest, and ditches regular antennas for a shark fin unit. Other than these changes, the Beast 2.0 should still be able to house seven passengers and have enough protection to be one of the safest vehicles on the planet. The prototype looks like it's higher off the ground, as well, which should help the next president to avoid an embarrassing moment. There's no word on whether the Beast 2.0 will be ready in time for the next president presidential inauguration in January, but our photographers report that GM recently stepped up its testing for the limousine at its Milford Proving Grounds. Related Video: Featured Gallery The Beast 2.0 Spy Shots Image Credit: KGP Photography Government/Legal Spy Photos Cadillac Truck Sedan president Hillary Clinton the beast