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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.

GM says over 40% of new China launches in next five years will be EVs

SHANGHAI — General Motors is planning an electric car offensive in China with more than 40% of its new launches in the country over the next five years set to be electric vehicles (EVs), the U.S. carmaker said on Wednesday. GM's electric vehicles, many of which will be all-electric battery cars, will be manufactured in China with almost all parts coming from local suppliers, the company said in a statement released at its Tech Day event in Shanghai. Reuters reported earlier on Wednesday that GM was planning to overhaul its Chinese line-up to stem a slide of sales after more than two decades of growth in a country that contributes nearly a fifth of its profit. GM's new China boss Julian Blissett told Reuters that new technologies, such as EVs and cars with near hands-free driving for highways, would play a key role in GM's China initiatives, which are part of a push to get annual sales in the country back to the 4 million peak it hit in 2017. GM did not say in its statement how many new or significantly redesigned models it was planning to launch in China over the next five years. "China will play a crucial role in making our vision a reality," GM CEO Mary Barra said in the statement, referring to its initiative to create what it describes as a future of "zero crashes, zero emissions and zero congestion" through electrification and smart-driving technologies. GM has said it plans to invest more than $20 billion in electric and automated vehicles globally by 2025. It was not clear how much of that investment will be spent in China. (Reporting by Norihiko Shirouzu in Shanghai; Editing by David Clarke) Related Video: Green Buick Cadillac Chevrolet GM Electric China

2014 Chevrolet SS makes its live debut

Chevrolet showed off the new 2014 SS in an airport hangar last night, its first rear-wheel-drive performance sedan in the US since the Impala SS from 1997. We'll have more to say about the SS later today, but this is the sedan that Chevrolet sees as the final piece in restoring its performance credentials. For those of you looking for a manual transmission, however, that wish will go unfulfilled - at least for now: the only two options buyers will have are the color and whether or not they want a sunroof.
We'll work on getting some more angles (in better light) today at Daytona International Speedway, but with fans seeing the car for the first time, we don't hold out much luck of getting a clear shot. So for now, enjoy the high-res gallery above.