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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, Toyota clean up in Best Car For The Money Awards

The U.S. News Best Cars for the Money Awards picks winners by looking at the average transaction price, five-year total cost of ownership, the regard a car has from the automotive press, reliability figures from J.D. Power and Associates and safety data from the National Highway Traffic Safety Administration and the Insurance Institute for Highway Safety. The result, according to the magazine, is "the best combination of critical acclaim and long-term value."
Ford nabbed six of the 21 categories that received awards this year, the Focus, Fusion, Fusion Hybrid, Taurus, Escape and Edge getting trophies. Toyota and its Lexus and Scion sub-brands took another five, the Tacoma and Tundra owning the two categories given to pickup trucks. The other ten awards were split between Honda with three, Buick with two, and one each for Subaru, BMW, Hyundai, Chevrolet and Mazda.
Follow the link to see all the winners and read about why they were chosen.

Autoblog Podcast #394

Episode #394 of the Autoblog Podcast is here, and this week, Dan Roth, Steven Ewing, and Michael Harley talk about the possibility of a supercharged Dodge Viper, the Chevrolet Silverado Rally Edition, the newly released supercharger kit for the Honda CR-Z, and rumblings of an Alfa Romeo 6C. We start with what's in the garage and finish up with some of your questions, and for those of you who hung with us live on our UStream channel, thanks for taking the time. Check out the rundown below with times for topics, and you can follow along down below with our Q&A. Thanks for listening! Autoblog Podcast #394: The video meant to be presented here is no longer available. Sorry for the inconvenience. Topics: Supercharged Viper Chevrolet Silverado Rally Edition Honda CR-Z Supercharged Alfa Romeo 6C In The Autoblog Garage: 2014 Ford Fiesta SE 2015 Cadillac Escalade 2015 Toyota Tundra TRD Pro 2015 Audi A8 L TDI Hosts: Dan Roth, Steven Ewing, Michael Harley Runtime: 01:32:30 Rundown: Intro and Garage - 00:00 Supercharged Viper - 44:25 Chevrolet Silverado Rally Edition - 55:19 Supercharged Honda CR-Z - 01:00:52 Alfa Romeo 6C - 01:07:29 Q&A - 01:13:41 Get the podcast: [UStream] Listen live on Mondays at 10 PM Eastern at UStream [iTunes] Subscribe to the Autoblog Podcast in iTunes [RSS] Add the Autoblog Podcast feed to your RSS aggregator [MP3] Download the MP3 directly Feedback: Email: Podcast at Autoblog dot com Review the show in iTunes