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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.

The Army goes off-roading with a hydrogen Chevy Colorado

The Chevrolet Colorado is joining the service. General Motors is working with the US Army Tank Automotive Research, Development & Engineering Center (TARDEC) to build a Colorado powered by a commercial hydrogen fuel cell stack, and the Army will use it in "extremes of daily military use for 12 months." TARDEC is the department that tests "advanced military automotive technology" and integrates them into ground systems. The aim is to see how well the benefits of a fuel cell vehicle can be adapted to the battlefield; hydrogen-powered vehicles are quiet, torquey, produce water, and can be used to provide electricity in the field. GM says the design sketch above "foreshadows" the Colorado that will go to boot camp and beyond, making it clear that this won't be the average midsize pickup. The press release below has more. Related Video: GM and U.S. Army to Demonstrate Extreme Off-Road Hydrogen Fuel Cell Chevrolet Colorado Agreement focused on proving unique utility and viability of fuel cell propulsion WARREN, Mich. 2015-11-19 – General Motors and the U.S. Army Tank Automotive Research, Development & Engineering Center (TARDEC) are modifying a Chevrolet Colorado midsize pickup truck to run on a commercial hydrogen fuel cell propulsion system and will expose the truck to the extremes of daily military use for 12 months. "Hydrogen fuel cell technology is important to GM's advanced propulsion portfolio, and this enables us to put our technology to the test in a vehicle that will face punishing military duty cycles," said Charlie Freese, executive director of GM's Global Fuel Cell Engineering activities. Fuel cell propulsion has very high low-end torque capability useful in off-road environments. It also offers exportable electric power and quiet operation, attractive characteristics to both commercial and military use. "The potential capabilities hydrogen fuel cell vehicles can bring to the Warfighter are extraordinary, and our engineers and scientists are excited about the opportunity to exercise the limits of this demonstrator," said TARDEC Director Paul Rogers. "FCVs are very quiet vehicles, which scouts, special operators and other specialties place a premium," he said. "What's more, fuel cells generate water as a by-product, something extremely valuable in austere environments." GM and TARDEC have fuel cell development and research facilities located 20 minutes apart in Pontiac and Warren, Mich.

2016 Chevy Silverado puts on a better face

When Chevrolet introduced the redesigned Silverado pickup for 2014, you, our loyal readers, gave the new truck's front-end a lukewarm response. Aside from saying it was ugly, one commenter came to the far more damning conclusion that this brand-new vehicle already looked dated. For 2016, Chevy has attempted to address opinions like that, issuing a comprehensive facelift to its bread-and-butter pickup. Designers cut way back on the chrome for 2016, fitting a body-color strip across the middle of the grille and going to a single-headlight design. Combined with twin LED running lamps, the new look is much more modern while still harkening back to the retro-ish look introduced a few years back. The new truck also gets a much more muscular and aggressive hood, while the front bumper is significantly more modern, and features vertical housings for what look like LED foglights. The bad news, here, is that there's only one picture, shown above. We have no idea what changes Chevy has made to the rear of the pickup, nor do we know what other versions of the truck beyond the Z71 seen here may be available. The Bowtie brand did, however, confirm that we'd see a wider application of the eight-speed automatic transmission, as well as a new version of the MyLink infotainment system, which will play nice with both Apple CarPlay and Android Auto. Look for much more on the freshened Silverado when it makes its official debut this fall. Until then, check out the press release and hop into Comments. We'd love to hear what you think about this facelift. 2016 Silverado: The New Face of Strong - Bolder, more sculpted look reflects Silverado strength, dependability - Available support for Android Auto and Apple CarPlay - Expanded use of 8-speed transmissions; additional safety technologies DETROIT – Chevy Trucks are on a roll, with Chevrolet pickup sales up 32 percent so far this year. Chevrolet intends to strengthen this momentum with significant updates for the 2016 Silverado 1500 full-size pickup. "The redesigned 2016 Silverado will build on Chevy Trucks' legacy of dependability. It will feature a more muscular appearance and offer new customer-focused technologies," said Sandor Piszar, marketing director for Chevy Trucks.