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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.

Ford F-150 Raptor R, Kia Telluride and SEMA highlights | Autoblog Podcast #754

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder and Associate Editor Byron Hurd. Byron has been sending the 2023 Ford F-150 Raptor R on the sand dunes of Lake Michigan. John has been off-roading in the updated 2023 Kia Telluride. Greg has been spending time in the Toyota Tacoma TRD Pro, Chevy Traverse High Country and Volvo V60 Cross Country. Next, they talk about the news, include SEMA highlights and the reveal of the 2023 Ford Transit Trail. Finally, they reach into the mailbag and discuss the Cadillac Celestiq's design. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #754 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we're driving Ford F-150 Raptor R Kia Telluride Toyota Tacoma Chevy Traverse High Country Volvo V60 Cross Country 2023 SEMA Show highlights 2023 Ford Transit Trail revealed Mailbag: Cadillac Celestiq Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related video:

Chevy Bolt meets 2016 Nissan Leaf at LA NEDW event [UPDATE]

The 2015 National Drive Electric Week kicked off this past weekend with events happening all around the world. Our friends from Plug In America (PIA) send us some notes and pictures from one of the larger events in Los Angeles, CA. This event was special because it saw the debut of the 2016 Nissan Leaf and the west coast debut of the Chevy Bolt concept. The two electric vehicles were in the same place at the same time for the first time ever. Besides that little bit of electric vehicle history, the organizers helped facilitate 800 test drives, PIA co-founder Zan Dubin Scott told AutoblogGreen. The city of Los Angeles also gave proclamations to movie director Chris Paine (Who Killed The Electric Car? and Revenge Of The Electric Car) and the three national organizers of Drive Electric Week: PIA, the Sierra Club and the Electric Auto Association. Speakers at the event included names that should be familiar to AutoblogGreen readers: California state senator Kevin de Leon, race car driver Leilani Munter, and Dave Barthmuss of General Motors, among others. Joel Levin, the executive director of Plug In America, said during his speech that, "Electric cars are changing the world. Every time one of these vehicles gets sold, our air gets a little cleaner. We will take a big bite out of climate change. Our economy will not be subject to wild swings in gas prices. And we will not be involved in foreign wars over oil." Tell us about your own NEDW events (that happened already or are about to happen) in the Comments below. UPDATE: We received the text of Andrew Speaker's comments at the event. Speaker is Nissan's director of Electric Vehicle (EV) Sales & Marketing. We've included them below. Thank you, and good afternoon! On behalf of Nissan, we are proud to sponsor National Drive Electric Week, and we're excited to be able to celebrate it here in Los Angeles with all of you. This is actually my first National Drive Electric Week event, and I am inspired by the level of enthusiasm here today, and seeing everyone's passion for electric vehicles first hand. Nissan has had some big news in the last few days with the introduction of the 2016 Nissan LEAF, which is the world's first affordable electric car to get more than 100 miles of range on a single charge. The 2016 LEAF offers a new 30 kWh battery with an EPA-rated 107 miles of range... and its making its global debut here in Los Angeles.