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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 to invest $150 million in Flint to boost heavy-duty pickup production

FLINT, Mich. — General Motors President Mark Reuss said on Wednesday that the automaker is investing about $150 million at its Flint Assembly plant in Michigan to boost production of heavy duty trucks by another 40,000 vehicles a year. Reuss announced the investment at the Flint truck assembly plant wearing a United Auto Workers pin. The Detroit automaker had announced back in February it was adding 1,000 jobs in Flint to build a new generation of heavy-duty pickup trucks. GM did not say that the latest investment would add more jobs at the plant, but Reuss said there could be opportunities to add workers as the launch of the automaker's new trucks progresses. GM has been under pressure from President Donald Trump and lawmakers of both parties to add jobs in the United States after it said last November it would idle the Chevy Cruze assembly plant in Lordstown, Ohio, and likewise had no new products for three other U.S. manufacturing plants. The Flint investment will include upgrades to the plant's conveyors and other new tooling, and will be completed in the first half of 2020. GM has invested more than $1.6 billion in the plant since 2013. Last month, GM said it would invest $24 million to increase truck production at its assembly plant in Fort Wayne, Indiana, which makes Chevrolet Silverado and GMC Sierra models. Sales of heavy-duty pickups in the United States have grown to more than 600,000 vehicles a year, up more than 20 percent since 2013, according to industry data. Prices for luxury models can easily top $70,000. GM's Chevrolet and GMC brands have long trailed Ford's F-series heavy duty trucks in the lucrative segment. The new Chevrolet and GMC heavy duty trucks have been re-engineered to tow heavier trailers, and keep pace in what has become an arms race among the Detroit Three automakers to claim superior torque and towing capability. Related: Silverado HD vs. 2019 Ram, Ford heavy duty trucks: How they compare on paper

Chevy Bolt wins 2017 Green Car of the Year

We knew that a plug-in vehicle was going to win the 2017 Green Car of the Year award this year, given that all five finalists have a way to charge up. And when Ron Cogan, the editor and publisher of Green Car Journal, announced the winner – the 2017 Chevy Bolt EV – he said that the car itself represents one of those times in the auto industry when everything is about to change. Similar to the invention of the starter motor, things are about to get different. For now, though, the fact that the Bolt EV won an award sounds like the same old thing all over again. Just this week, it was named Motor Trends Car of the Year and to the Car And Driver Top 10 list. The other four finalists for Green Car of the Year included the Toyota Prius Prime, the Chrysler Pacifica, the Kia Optima (including hybrid and plug-in hybrid models) and the BMW 330e iPerformance. Last year, the winner was the 2016 Chevy Volt. Did Green Car Journal make the right selection this year? See the award ceremony below.