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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 recalling 118K Colorado, Canyon pickups over missing hood latches

General Motors has announced a recall of 118,800 Chevrolet Colorado and GMC Canyon pickup trucks due to the possibility of secondary hood latches not being installed at the time of manufacture. The affected vehicles are from the 2010, 2011 and 2012 model years, all of which were built between November 9, 2009 and August 28, 2012.
According to the official National Highway Traffic Safety Administration report, these trucks fail to "comply with the requirements of Federal Motor Vehicle Safety Standard No. 113, 'Hood Latch System.' The hood may be missing the secondary hood latch." In other words, owners of these trucks could find their vehicles' hoods opening unexpectedly while driving.
The official recall campaign is expected to begin on January 17, 2013. Dealers will inspect the affected pickups and if a secondary hood latch is not present, one will be installed free of charge. Scroll down to read the official NHTSA report.

How two-state Chevy Spark EV outsold 50-state Volt last month

Is it really just about price? Last month, the Chevy Spark EV got a sizable price drop of $1,500 alongside a lowered lease price of $139 a month (down from $199). Those numbers, particularly that cheap lease, had a tremendous impact on how many all-electric Sparks GM sold last month. There were 920 Spark EVs sold in April, and the Spark EV is available in only two states: California and Oregon. Sales will start in Maryland in the third quarter of 2015, but there are no pre-orders taking place there, so all 920 were West Coast sales. To be more precise, there were about 864 Spark EV leases signed last month, since 94 percent of those 920 sales were retail leases. As Annalisa Bluhm from Chevrolet communications told AutoblogGreen, that level was, "simply insane." "In those states which offer Spark EV, you can get a 1LT Spark EV for less than a 1LT Spark, with more features" Bluhm said. "Factor in that you will save approximately $82 per month by abstaining from gas, and it's easy to see why people went crazy for the Spark." Let's put 920 into perspective. For one thing, it's crazy up from the 151 Spark EVs sold in March 2015 and the 97 sold in April 2014. It's also almost as many as GM sold all last year, and way more than two years ago. The General sold 653 Spark EVs in 2013 and 1,146 in 2014. To throw in a comparison with GM's longstanding plug-in champion, the aging Volt, the Spark EV came out ahead in the monthly tally for the first time ever. In April, the Volt sold 905 units. The plug-in hybrid's best-ever sales month was August 2013, when it sold 3,351 units. Counting all models and powertrains, Chevy sold 3,743 Sparks in April. So, does this success mean that Chevy is looking to bring the Spark EV to more markets? Bluhm said that GM is considering other states and is always looking at the business case, but has "nothing to announce yet." Related Video: The video meant to be presented here is no longer available. Sorry for the inconvenience.