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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.

Recharge Wrap-up: EVs poll well in Portland, Tesla seeks office space

In a poll of drivers in Portland, more than 80 percent said they would be driving an EV in the next 10 years if they weren't already. The poll was small and not scientific, with just 218 votes cast, but it does reflect a slice of a certain population with changing attitudes toward electric mobility, and 80 percent is an impressive figure. Additionally, 43 percent of respondents planned to have an EV in the next five years, and only 18 percent said they prefer gasoline-powered vehicles. With EVs in many ways repeating the adoption process that hybrids went through a decade ago, the five- or ten-year timeframe for more widespread use seems only natural. Read more at the Portland Business Journal. San Francisco Mayor Ed Lee parks like an idiot, or rather, his security detail does. His Chevrolet Volt has been ticketed for parking six times since he took office. Granted, those street-sweeping signs are tough to keep track of, but his car has been photographed blocking at a bus stop while grabbing a burrito (who hasn't sinned in the name of a delicious burrito?), and was even caught parked in a crosswalk. The tickets were all dismissed. Read more from the SF Gate. Tesla is looking for office space in Silicon Valley. As the electric car company continues to search for a place to build its $4- to $5-billion battery Gigafactory, it also needs some real estate to expand its operations near its Palo Alto home. Tesla has expanded from 3,000 to 6,000 California-based employees since the end of 2012, and plans to add 500 more by the end of the year. It is currently looking for 200,000 to 300,000 square feet of office space close to its Fremont factory, according to sources in the real estate industry. Read more at the Silicon Valley Business Journal. Related Gallery 2014 Chevrolet Volt View 11 Photos News Source: Portland Business Journal, SF Gate, Silicon Valley Business JournalImage Credit: Paul Sakuma / AP Green Chevrolet Tesla Electric recharge wrapup portland silicon valley parking ticket

Silverado HD, Touareg V10 TDI face off in diesel tug-of-war

A couple weeks ago, we watched a Chevrolet Silverado get dominated by a Dodge Ram Heavy Duty in a fullsize pickup tug-of-war, but in that truck's defense, Chevy's Vortec gas engine was no match for the torquey Cummins turbo diesel. For our next round of vehicular tug-of-war, a Duramax-powered Silverado HD takes on Volkswagen Touareg V10 TDI.
Now, on paper, putting the Duramax V8's 365 horsepower and 660 pound-feet of torque up against the V10's 310 hp and 553 lb-ft looks like an easy win for the Bowtie, but unfortunately, this battle has a similar result as the Dodge versus Chevy video, with the Silverado smoking its tires trying to move forward as it gets pulled backwards. Put another way: YouTube 2, Chevy Silverado 0.
It just goes to show, though, that big tires, bolt-on fender flares and goofy smoke stacks don't improve your towing abilities. Besides, what did the Silverado driver expect when the Touareg V10 TDI has towed a Boeing 747 in the past?