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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.

Kid Rock's Chevy Silverado is a working-class hero [w/video]

Rock stars are known for their swagger, and Kid Rock brings a mountain of that confidence to his design for this chrome-festooned 2016 Silverado 3500HD at the SEMA show. Inspired by his song Born Free and a visit to the pickup factory in Flint, MI, the styling is meant to celebrate the folks that build these trucks everyday. The Silverado sparkles like a beacon under the lights at the SEMA Show thanks to its black metallic-flecked paint and acres of chrome. The shiny stuff covers the custom grille, exhaust stacks, 22-inch wheels, and side steps. In a patriotic nod, silver Stars and Stripes run down the side to offer a little contrast to the dark body. Further emphasizing the pickup's huge size, a trailer carries a pair of Gibbs Sports Quadskis that are decorated to match the truck. Kid Rock takes inspiration from – get this – acid-wash jeans for the interior by combining Sky Cool Gray leather seats with metallic-looking inserts. Appropriate for a musician, there's also a custom Kicker stereo in there, and Made in Detroit logos adorn the door sills and glovebox. Related Video: Show full PR text SILVERADO 3500HD KID ROCK CONCEPT CELEBRATES FREEDOM Boldly styled custom 'dually' truck honors working-class Americans LAS VEGAS – Inspired by his hit song "Born Free," musician Kid Rock collaborated with Chevrolet to design a customized 2016 Silverado 3500HD "dually" that celebrates freedom and honors American workers. The truck was introduced today at the SEMA Show in Las Vegas, where it joined other personalized Chevy truck concepts designed to showcase the depth and breadth of the brand's pickup truck lineup. Michigan-born Kid Rock visited the Silverado HD assembly plant in Flint, Mich., to meet with the members of UAW Local 598, who built the truck, before driving it to Chevrolet's design studio to share his ideas for its customization. "The Flint plant – and everyone on the line – is the backbone of America," said Kid Rock. "I wanted the design for the truck to be bold, but with features and elements that wouldn't be out of reach for working-class guys." As a result, his Silverado features several enhancements, including a custom chrome grille with the Born Free logo and an enlarged Chevy Bowtie emblem, chrome exhaust stacks and patriotic graphics that flow across the body sides. A unique execution of the patriotic motif was an idea he expressed at the start of the project.

Recharge Wrap-up: Toyota FCV Rally Car To Compete, Barra bullish on Chevy Volt

The Toyota FCV will compete in the last stage of the 2014 Japanese Rally Championship. The sport-tuned hydrogen-powered car will tackle the 177-mile Shinshiro Rally on November 1 and 2, emitting no greenhouse gases in the process. The rally course will help prove the safety of the vehicle before it goes on sale in Japan in the next several months. The Toyota FCV, rumored to be called "Mirai" in Japan, will begin sales there before April, according to Toyota, and in the summer in the US and Europe. Read more in the press release below. Carsharing is becoming more popular, and more visible, throughout the world, including the US. According to WardsAuto columnist John McElroy, 18 percent of US drivers have used some sort of carsharing service. Additionally, he says 60 percent of Americans are familiar with Zipcar and Uber. Mercedes' Harald Kroeger says promotions like free parking for carshares in Stuttgart are encouraging growth for Daimler's carsharing service, Car2go. Read more at WardsAuto. Ethanol is being help up by rail transport, according to ethanol producer Green Plains. More and more stations are carrying E15 blend gasoline, but grain producers have complained that crude oil is given higher priority by the rail lines shipping it, which rail companies deny. Union Pacific and BNSF Railway say they are stepping up service to make sure that ethanol can be shipped reliably to customers. Read more at Omaha World-Herald. General Motors "has placed a significant bet [on] the electrification of the automobile," says CEO Mary Barra. In a speech to the Detroit Economic Club this week, she spoke about the Chevrolet Volt, and its importance to GM's future. While Barra admits the Volt's success has been "not everything we wanted," it has provided experience, and shows that EVs have "an important role in the future of GM." The new Volt is more refined, stores more energy, has longer range, uses less fuel and is a big investment for Michigan. She announced that the new Volt's electric drive system will be built in Warren, and that all of its major components will be made in Michigan. "Silicon Valley doesn't have a corner on the market for innovation, creativity and drive," says Barra. "These qualities exist here – in this region – as well." See the speech's highlight video and read more in the transcript below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.