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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.

Weekly Recap: Lamborghini to build SUV

Finally, Lamborghini will build a sport utility vehicle. The Italian supercar maker confirmed this week that it will launch a luxury SUV in 2018. It will be built at Lamborghini's soon-to-expand factory in Sant'Agata Bolognese in Italy, and will double the company's current sales volume. Lamborghini did not announce a name for the vehicle or other details, but noted a concept version, the Urus, was displayed at the Beijing motor show in 2012. It will be sold around the world, but it's expected to be a critical offering in the United States, China, and the Middle East. The automaker projects the SUV will sell about 3,000 units per year, and it will be the third product in Lamborghini's portfolio. It currently sells the Huracan and Aventador supercars. "The introduction of a third model line endorses the stable and sustainable growth of the company and signifies for us the beginning of a new era," Lamborghini chief executive Stephan Winkelmann said in a statement. The project is also a boon for Italy, which will get 500 new jobs in the Emilia Romagna region as Lamborghini's factory will nearly double in size. Ian Fletcher, principal analyst for IHS Automotive, said the SUV will position Lamborghini for future growth. "It could well also bring new customers to the brand [who] may find the dramatic styling of Lamborghini products appealing, but find its typical sports cars restrictive," he said. "If it is a success, the SUV could be a catalyst to Lamborghini broadening its portfolio further." OTHER NEWS & NOTES GM invests in Chevy Camaro factory General Motors is investing $175 million to upgrade its factory in Lansing, MI, to build the 2016 Chevy Camaro. The investment will pay for new tooling and equipment. The improvements include three new paint systems and two new robotic framers. GM will add a second shift at the factory to build the Camaro, resulting in 500 jobs. The automaker had dropped the plant to one shift last year amid slow sales for its products, the Cadillac ATS and CTS. GM is spending $5.4 billion over the next three years to upgrade its US facilities. Last week, GM announced plans to spend $439 million to build a new paint shop for the Chevy Corvette. While the Camaro and Corvette plant improvements are intriguing to enthusiasts, GM also confirmed this week that it is investing $1.2 billion in its Fort Wayne (IN) factory that builds trucks.

GM recalling over 243,000 crossovers over possible seat belt defect

2010 Buick Enclave - Click above for high-res image gallery
The summer of 2010's recall hit parade continues unabated today, with General Motors having just announced that it is asking 243,403 owners of its 2009-2010 Lambda crossovers to bring their three-row haulers in for inspection. The culprit? Second-row seat belts in select Buick Enclave, Chevrolet Traverse, GMC Acadia, and Saturn Outlook CUVs have "failed to perform properly in a crash."
According to GM, a second-row seat-side trim piece is to blame, as it can impede the upward rotation of the buckle after the seat is folded flat. As a result, if the buckle makes contact with the seat frame, cosmetic damage can occur, potentially requiring additional force to operate the buckle properly. So far, no great shakes, but in the process of applying that additional force, the occupant may push the buckle cover down to the strap, potentially revealing and depressing the red release button. As a result of this, the belt may not latch, or in certain cases, it may actually appear to be latched when, in fact, it isn't.