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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.

Chevy will reveal the Bolt EV tomorrow at CES

The moment that electric vehicle consumers and green propulsion enthusiasts have been waiting for is almost upon us, as Chevy confirmed that it will unveil the production version of the 2017 Bolt EV Wednesday at CES in Las Vegas. Chevrolet previewed the Bolt in concept form at the Detroit Auto Show almost a year ago, proposing a compelling rival to the likes of the Nissan Leaf and BMW i3. We've expected the CES debut for awhile, and Chevy projects that the finished product will boast a range of more than 200 miles on a single charge. That's nearly double the Leaf's range, and significantly farther than the i3 will travel even with the Range Extender kicking in. All of that for under $30,000 after federal tax credits. Of course, Chevy's own Spark EV costs much less, but will only go 82 miles before it needs to plug in again. If you won't be in Vegas for the unveiling tomorrow, you can catch it on Facebook. It will be the first vehicle to debut on the new Facebook Live, featuring both a live video stream and a 360-degree interactive interior video. Once out on the market, the Bolt EV will join the Spark EV, Volt PHEV, and Malibu hybrid in a growing array of electrified vehicles from the American automaker, rivaling the likes of Toyota and Nissan for the most electrified vehicles in its lineup. Chevrolet Bolt EV Will Debut at CES 2016-01-05 DETROIT – Chevrolet will unveil the 2017 Bolt EV at the International Consumer Electronics Show (CES) in Las Vegas on Wednesday, Jan. 6, and be the first auto brand to work with Facebook to debut a vehicle using Facebook Live. With the addition of the Bolt EV to a lineup that includes the all-new 2016 Volt, 2016 Malibu Hybrid and Spark EV, Chevrolet will offer consumers more affordable, electrified vehicle options than any other major automotive brand – solidifying its position as the leader in electrification. "The Bolt EV truly embodies the ingenuity that is at the core of everything we do at Chevrolet," said Alan Batey, president of General Motors North America and head of Global Chevrolet. "The technologies and the engineering expertise behind the Bolt EV are tremendous examples of the kind of innovation we intend to offer our customers, across an array of products at a tremendous value – something only Chevrolet can deliver." Building on the electrification expertise established by the Volt, the Bolt EV is a game-changing, long-range electric vehicle.

Nissan Leaf sales get January jump as Chevy Volt trends downward

The cold January sales dip hit both the Nissan Leaf and the Chevy Volt last month, but when compared 2014 to 2013's first-month-of-the-year sales totals, one of the two early plug-in vehicles obviously came out on top. The top Leaf market also shifted away from Atlanta for the first time in months. Last year, the Leaf sold just 650 units in January, but it managed to move 1,252 last month, a 92.6-percent increase over 2013 but a big drop from the 2,529 sold in December 2013. Paige Presley over at Nissan told AutoblogGreen that the Leaf has now broken sales records for 11 months straight and that, "we see unique seasonality with some December pull-ahead demand based on federal and state tax incentives." The number one Leaf market also shifted away from Atlanta for the first time in months, moving back to San Francisco. That change could be short-lived. "We had some inventory constraint issues early in the month in Atlanta with end-of-year demand depleting stock," Presley said. "By the time we resolved that, the weather hampered sales." There was not as much good news on the Chevrolet front. Last month, the Volt sold 918 units, down from 1,140 in January 2013 and 2,392 in December 2013. It also marks the first time the Volt has sold in the three-digit range since January 2012, when it sold 603 copies. That string of solid months means that the plug-in hybrid has a roughly 12,000-unit lead over the EV since the two cars brought plug-in vehicles back to the mass market all the way back in December 2010. We will have our full report of January's green car sales up soon.