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How GM engineers are using diaper 'snow' to keep you warm

Testing how snow affects General Motors' vehicles isn't really a problem right now for the company's engineers, but in the dog days of summer the process isn't exactly easy. The only real option is for them to book time at the automaker's climatic wind tunnel. However, a flash of brilliance from an engineer allows snow to be simulated regardless of the temperature outside, and the discovery is all because of his daughter's wet diaper. The realization came to GM Thermal Systems engineer Nicholas Jahn while he was swimming with his daughter and noticed how her diaper ballooned in size in the water. He found out the substance that makes this possible is called sodium polyacrylate. When the material gets wet it grows and forms fluffy flakes that are a close imitation of snow. Best of all, the stuff can be prepared easily any time of the year, and it's reusable. The engineering team uses the material to test the effectiveness of the heating systems of GM's vehicles. They spread the sodium polyacrylate over the inlets at the base of the windshield to obstruct the airflow and then crank the heater. After some time, they can see how much is being sucked into the system and design more efficient systems in the future. See how the process works in the video above and read about the diaper discovery in GM's press release below. Diapers Change Chevy Cruze Winter Warm-up Time GM validation engineer uses diaper material "snow" to reduce frigid drives 2015-01-06 DETROIT – An item commonly found on an infant's changing table is helping General Motors' engineers simulate snow year round, ensuring heating systems in cars like the 2015 Chevrolet Cruze can quickly and efficiently warm its interior. Packed snow can prevent air from entering the inlet panel at the bottom of the windshield, obstructing the flow of air into the heating system and reducing the amount of air it can push out. This can lead to less efficient warming of the car's interior and windshield defrosting. "The last thing anyone wants to do when it's freezing cold out is scrape their windshield," said Nicholas Jahn, GM Vehicle Thermal Systems engineer. "The testing we perform on the Chevrolet Cruze with the diaper material allows us to maximize the car's heating capabilities." Ironically, Jahn stumbled upon his diaper-based testing method in the middle of summer. During a swim with his daughter, he noticed her diaper multiplied in size when it came into contact with water.

Can DARPA hack into a Chevy Impala through OnStar?

An ex-video game wizard named Dan Kaufman tracked a circuitous route to becoming the head of the Software Innovation Division at the Defense Advanced Research Projects Agency. DARPA normally makes these pages because of its work with autonomous vehicles and automobile technology that overlaps with military applications, but for the past five years Kaufman and his multiple research teams have been working on creating unhackable software code that could be used in military drones. Part of that work has involved hacking into just about everything else, and as a segment on 60 Minutes reveals, that includes cars. The masterminds discovered a way to hack into OnStar, the General Motors telematics system. After figuring out how to hook into OnStar's emergency communication system, they overwhelmed it with data. While the computer was busy trying to manage the overrun of data, the research team inserted code that took control of the sedan's other computers, giving it control. So while reporter Leslie Stahl tooled around in a parking lot, a DARPA researcher with a laptop would occasionally take control of the car, like by applying its brakes or, conversely, removing the ability for Stahl to use the brakes. Hacking into vehicles has been in the news for years: Car and Driver ran a feature on the various ways cars could be hacked in 2011, two hackers released a car-hacking code at the hacker-fest Defcon in 2013 and demonstrated how it worked on a Toyota Prius and Ford Escape, and German researchers demonstrated how they could hack into BMW's Connected Drive remote-services system last week via an attack on the cars' telematics units. This isn't about GM or Onstar or the future; hacking into cars of all kinds isn't coming, it's here, and it doesn't take the half-billion-dollar annual budget of a small DARPA division to do it. Check out the 60 Minutes video on the CBS site (you can watch the entire video from a mobile device without logging in). The OnStar hacking starts at 6:45, but it's worth watching what leads up to that. News Source: Jalopnik Chevrolet Safety Technology Infotainment Autonomous Vehicles Videos Sedan hacking 60 minutes

Top Gear names BMW i8 Car of the Year, Corvette, Ferrari, Mercedes also win big

The lads at Top Gear have released their listing of the finest cars of the past year, handing the ultimate honor to BMW's revolutionary i8 plug-in-hybrid supercar. "The i8 is a milestone in the annals of automotive history and a glorious statement for an exciting and positive future. The i8 delivers - and then some," the British mag wrote. The i8, though, was far from the only hybridized car to take victories. James May and Richard Hammond both highlighted hybrids as their personal cars of the year, with May saluting the Ferrari LaFerrari and the Hamster, unsurprisingly, heaping praise on the Porsche 918 Spyder. Jeremy Clarkson, meanwhile, opted to shock many by selecting not only an American car as his best of 2014, but giving the honor to of all things, a Corvette. Clarkson wasn't the only person to honor the USA's iconic sports car, with the new, 650-horsepower Z06 variant being named TG's Muscle Car of the Year. Other big winners include Mercedes-Benz, which TG honored for S-Class Coupe (Luxury Car of the Year), the new AMG GT (Sports Car of the Year) and the not-for-US C-Class Estate (Family Car of the Year). The 458 Italia Speciale A snagged a second win for Ferrari. The best of the rest include the Citroen C4 Cactus, Renault Twingo, Volkswagen Golf R, Lamborghini Huracan and Audi TT. Take a look below for the celebratory press blast from BMW. The BMW i8 wins Top Gear Car of the Year The BMW i8 has been named as Top Gear magazine's global Car of the Year 2014. The plug-in hybrid performance vehicle beat off some stiff competition from a host of other premium and luxury manufacturers to win the overall award. The editorial team of Top Gear commended the BMW i8 for its breadth of abilities. Its 1.5-litre three-cylinder turbocharged petrol engine combined with an electric motor gives searing acceleration and driver enjoyment but all wrapped in a package that takes BMW's EfficientDynamics philosophy to the extreme courtesy of CO2 emissions less than 49g/km and a 135mpg combined cycle figure. Charlie Turner, Editor in Chief at Top Gear magazine, said: "The BMW is a milestone in the annals of automotive history and a glorious statement for an exciting and positive future. The i8 delivers – and then some. It's the kind of car we should celebrate, a beautiful vision of the future, delivered now.