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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.

January no slump for Chevy Volt this year

The mild winter didn't tank January sales for the Chevy Volt this year. While last month's sales were a lot lower than December's – because January new vehicle sales are almost always lower than December's - the second-gen Volt had a good month. GM sold 996 Chevy Volts last month, an increase of 83.8 percent over the 542 sold last January. In December, 2,114 Volts were sold. The trend wasn't as good over at Nissan, which sold 755 Leafs in January. That's a drop of 29.4 percent compared to the 1,070 sold in January 2015. Given the lower overall sales for the Leaf these days, the drop from December wasn't as bad, with 1,347 Leafs sold in the last month of 2015. What's absolutely amazing is that after over five complete years of sales, the cumulative totals of the Leaf and Volt sales in the US remain almost exactly the same. The current difference is only 600 units, with the Leaf on top. If the Volt continues to outsell the Leaf for the next few months – and all indications are that that is likely, since Nissan is offering the first-gen model while Chevy has put out it much-improved second-gen - then we will soon get back to an equilibrium like we were at the end of February 2015, when the difference was just two units. As always, our more complete wrap up of all the green car sales in the US will be coming soon. Stay tuned. Related Video: News Source: Nissan, GM Green Chevrolet Nissan Electric ev sales

Chevy to reveal new Spark in Seoul and New York

Chevy is preparing to roll out an all-new Spark next month, giving us a taste of things to come with the teaser image above. The new Spark is set to debut simultaneously at car shows in Seoul and in New York on April 2, joining the new Malibu that will also mark its debut at the Manhattan expo. Why introduce the new Spark at the same time in South Korea and in the US, you ask? Probably because those are the two biggest markets for Chevy's smallest car, accounting for the lion's share of the 1.1 million units sold in 71 markets around the world since its introduction in 2009. Chevy hasn't revealed much about the new Spark, except to say that its styling will be more sophisticated than the "youthful whimsy" of the current model. A Spark of Sophistication Chevrolet's redesigned global minicar to debut in Seoul and New York on April 2 2015-03-09 DETROIT – The all-new 2016 Spark will debut on April 2 at the Seoul and New York auto shows, Chevrolet announced today. A sleeker, more aerodynamic profile and a progressive take on Chevrolet's signature design cues will give the redesigned Spark a more sophisticated aesthetic that reflects the changing tastes of the global minicar market. "The new Spark's design has evolved and grown up with the segment," said Michael Simcoe, GM International vice president of Design. "The youthful whimsy of the original Spark is still in its genes, but it is conveyed in more traditional proportions that reinforce the customer's refined expectations." Chevrolet has sold more than 1.1 million Sparks around the world since it went on sale as the Beat in India in late 2009. Today, the Spark is available in 71 markets worldwide, selling the most in South Korea, followed by the United States and Mexico. Spark is attracting younger and first-time car buyers to Chevrolet with 26 percent being under the age of 35. Sales of the Spark in the U.S. are up 32 percent in the first two months of 2015 versus the same period in 2014. Founded in 1911 in Detroit, Chevrolet is now one of the world's largest car brands, doing business in more than 115 countries and around 4.8 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature engaging performance, design that makes the heart beat, passive and active safety features and easy-to-use technology, all at a value. More information on Chevrolet models can be found at www.chevrolet.com.