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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.

Recharge Wrap-up: Chevy Volt CarPlay video, Tesla Supercharger importance

A video demonstrates Apple CarPlay on the touch display in the next-generation Chevrolet Volt. The Volt's eight-inch (bigger than an iPad Mini) capacitive display is capable of putting Siri and your iPhone apps and right at your fingertips. It's "the best CarPlay display I've seen," says the user in the video. In case you're not in the market for a new Volt, 9to5Mac offers some of its favorite aftermarket CarPlay screens. See the video above, and read more at 9to5Mac. A single Supercharger can make a big difference in the life of a Tesla owner. Teslarati's Electric Jen talks about purchasing a Model S, being assured by both Tesla employees and the map of planned Supercharger sites that one would be built along an important route for her. With the construction being pushed back, it made visiting family tricky. "As if owning such a grand car isn't embarrassing enough, asking for a ride to drop off and pick up said car because you can't make it home without charging really made me feel awkward," she says. "You see, one single charging location can mean the world to some people," Jen adds. Read the whole article at Teslarati. Tesla once had considered creating mobile range extender trailers for the Model S. Elon Musk touched upon the abandoned idea during his visit to Paris. While Tesla ultimately dismissed the concept, Nomadic Power has taken the opportunity to hitch their product onto the Tesla brand. "We are delighted, that Tesla Motors' CEO Elon Musk is thinking about a concept like ours for even more extending the range of the Tesla models," says Nomadic Power's CEO Manfred Baumgaertner. He adds, "This confirms our approach to build a long distance mobility provider for all electric vehicles on the market." If you say so, Baumgaertner. Read more from International Business Times, and in the press release below. Renault is giving its EV batteries a second life through Connected Energy's E-STOR. When the batteries have degraded to the point that they're no longer suitable for use on the road, they still have a significant capacity that can be used for other purposes. Still useful for stationary storage, they can be used to support charging sites in order to allow for faster charging. The stationary batteries can charge slowly at the site, but then offer up the juice in a hurry when it's needed for a vehicle. Read more from Renault.

GM learning from current Chevy Volt owners as it works on next-gen model

Details of the second-generation Chevrolet Volt extended-range plug-in hybrid are coming in at a trickle, and the latest is that the 2016 model-year Volt will be improved in all meaningful areas, including performance and all-electric range, says General Motors powertrain director Larry Nitz. 60 percent of Volt customers only charge using a standard 110 outlet. Nitz was speaking to Autoline After Hours about the current and future Volt. He said that GM has been tracking Volt driving habits and found that about two-thirds of the Volts' collective miles are driven in electric mode, and that 81 percent of all Volt trips were done in pure EV mode. Additionally, Volt drivers plug the car in 10 times each week, on average. Nitz also said 82 percent of the Volt's commuting miles are coming from the plug instead of the gas tank. Oh, and 60 percent of Volt customers only charge using a standard 110 outlet. Last month, GM released a teaser shot of the 2016 Volt (above) and said the car would make its worldwide debut at the 2015 North American International Auto Show next January. Earlier this year, the Volt was reported to be getting a new chassis for the upcoming version. The Volt could use a bit of new life. Through August, Volt sales were down 12 percent from a year earlier to 13,146 units, and sales plunged 25 percent alone. That compares unfavorably to the Nissan Leaf battery-electric vehicle, whose 2014 sales have jumped 34 percent to almost 19,000 units. You can see Nitz dish the goods in the video below (Volt comments start at around minute 15). You will also notice AutoblogGreen contributor Gary Witzenburg talk about his history with the EV1 and share his take on the Volt. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.