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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 Bolt, GM's 200-mile EV, could debut in Detroit

It's not news that General Motors is working on a $30,000 electric vehicle with a 200-mile range. Then-CEO Dan Akerson said as much back in 2013. What we've heard before is that this mystery EV will be based on the Chevrolet Sonic and will will arrive in 2017. So, if that's all correct, then it would make sense that confirmation of this plan would come at the 2015 Detroit Auto Show, which is just around the corner. And lookee here... The Wall Street Journal is reporting that GM will unveil a concept Chevy Bolt at the Detroit show on Monday. That name sure makes sense, too, since GM registered that trademark back in August. According to the Journal, the rumored numbers – 200-mile range, $30,000 price – are still what's expected. Some new purported details are that the battery will come from LG Chem, which also makes the Volt's batteries, and that the Bolt will be a crossover that could be sold around the world. This all smacks of a preemptive strike against the Tesla Model 3, which is also due around 2017. Currently, GM sells the Spark EV in limited areas of the US, despite a lot of excitement for wider availability. To sell a 200-mile EV for $30,000 means that GM and LG Chem will likely have drastically reduced the cost of making a big plug-in vehicle battery. What this means for the new Volt and GM's future plans is something we're more than a little excited about to learn more of on Monday, the same day that we get to see the redesigned Chevy Volt for the first time. Well, aside from the CES teaser. Green Chevrolet Crossover Electric 2015 Detroit Auto Show Chevy Bolt bolt

A hybrid and electric Corvette, plus we drive the Ioniq 5 | Autoblog Podcast #728

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Road Test Editor Zac Palmer. Zac drove the electric 2022 Hyundai Ioniq 5, and Greg drove the fire-breathing 2022 Maserati Levante Trofeo. The two dive deep into the relatively heavy news week by starting off with a discussion about the upcoming hybrid Corvette before chatting about what the electric Corvette might be like. They have a chat about the possibility of Porsche and Audi officially joining the Formula 1 field. Then, Greg and Zac get into some quick-hitting news to round out the segment by dissecting the updated Kia Soul (now without a turbo), the 30th Anniversary Edition Land Rover Defender and the new CEO at Aston Martin. Following the news and drive reviews, they rope in Senior Editor, Green John Beltz Snyder to give them a quick download of what went down at the first drive for the 2022 Ford F-150 Lightning. Finally, they reach into the mailbag and answer some questions from someone who is less than pleased about infotainment systems in some new cars. And lastly, the gang hears back from someone they helped out in a prior Spend My Money segment on the podcast. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #728 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 News The hybrid AWD Corvette and the electric Corvette Audi and Porsche to enter Formula 1 Land Rover Defender 30th Anniversary model 2023 Kia Soul refresh A new CEO at Aston Martin Cars we're driving 2022 Maserati Levante Trofeo 2022 Hyundai Ioniq 5 Dispatch from the 2022 Ford F-150 Lightning first drive in Texas Mailbag: A discussion about complicated infotainment systems Also, trading a Model 3 for an Escape PHEV? 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.