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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.

2016 Chevy Colorado grabs Motor Trend Truck of the Year award

It's not an easy feat to win Motor Trend Truck of the Year twice in a row, but the 2016 Chevrolet Colorado managed to do just that. Thanks to the introduction of the 2.8-liter Duramax four-cylinder diesel, the magazine decided to bring the pickup back to defend the title. In more good news for the Bowtie brand, the 2016 Camaro earned the magazine's Car of the Year award. The Colorado beat a tough group of finalists to earn the nod this year, including its GMC Canyon sibling. The Chevy Silverado and GMC Sierra also made this year's list. The Nissan Titan XD and latest Toyota Tacoma rounded out the challengers. A model had to shine in six criteria to earn the title: advancement in design, engineering excellence, safety, efficiency, value, and performance of intended function. Like it did with the Camaro, Motor Trend posted a story online that explained the rationale for picking the Colorado again. They praised the diesel profusely and lauded the whole platform as quite a capable hauler. This year's Motor Trend SUV of the Year honor went to the Volvo XC90. The Swedish 'ute had to win against an initial group of 16 candidates that the magazine eventually whittled down to finalists that consisted of the Honda Pilot, Lincoln MKX, the combined Mercedes-Benz GLE-Class and GLE Coupe, and Nissan Murano. "Seven-passenger people movers aren't supposed to drive like this," senior features editor Jonny Lieberman said about the Volvo in the announcement of the champions. The Honda CR-V won last year. In the explanation online, the judges applauded the XC90's new modular platform, and they loved both the T6 twin-charged engine and T8 hybrid version. The SUV's key enamored the writers, too. Related Video: MOTOR TREND Announces 2016 "Of The Year" Winners Car of the Year, Truck of the Year, SUV of the Year, and Person of the Year announced during live ceremony and webcast in Los Angeles LOS ANGELES, Nov. 16, 2015 /PRNewswire/ -- Today, for the first time in the brand's 66-year history, MOTOR TREND announced winners of the Golden Calipers for Car of the Year, Truck of the Year, SUV of the Year, and Person of the Year at a red-carpet gala in front of an audience of industry insiders and celebrity guests. The awards show was also streamed live on the MOTOR TREND Channel on YouTube, with 3.5 million subscribers the world's largest automotive video channel, and on MOTOR TREND OnDemand, the brand's new subscription video on demand (SVOD) channel.

Nissan Leaf sets new November sales record, Chevy Volt drops again

When you talk to people in the plug-in vehicle industry, one theme you hear repeatedly is that the more plug-in cars that are out there, the better things are for everyone. One reason is that more EVs build a need for more public chargers, and more chargers mean more people see that plugging in is feasible. But there's still something to be said for old-fashioned competition, and in the sales race between the two long-running plug-in vehicles in the US, the Nissan Leaf is resoundingly beating the Chevy Volt for 2014. In fact, it won't be long before the EV's cumulative sales top the PHEV's. But that's a topic for another month. For now, we have the sales results from November. Unsurprisingly, Nissan set another monthly record (that is, the best Leaf sales in any November, the 22nd time in a row we've seen a monthly record) with 2,687 sales last month. That's up 34 percent over last November and up 35 percent year-to-date. Toby Perry, Nissan's director of electric vehicle marketing, said in a statement that, "Our 'Kick Gas' ad campaign and 'No Charge to Charge' launch in Chicago and Atlanta drove an increase in November Leaf sales. Even with gas prices falling across the country, consumers appreciate that the cost of driving a Nissan Leaf is still a fraction of that of a gas-powered car." Over on the Chevy side of the ledger, there were 1,336 Volt sales last month, down 30.4 percent from the 1,920 sold in November 2013. So far this year, Volt sales are down 16.4 percent and Chevy has sold 17,315 Volts in 2014. As we said last month, the Volt slump might be due to people waiting on the new version to make an appearance at the Detroit Auto Show next month before going on sale in the second half of 2015. So far in 2014, Nissan has sold 27,098 Leafs. Look for our detailed post of US green car sales in the near future. Until then, please discuss last month's Leaf and Volt sale in the comments, below. News Source: Nissan, General Motors Green Chevrolet Nissan Electric Hybrid PHEV ev sales hybrid sales