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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 reintroduces Tripower name in the worst way possible

The story of General Motors' use of the Tripower moniker begins way back in 1957, when Semon E. "Bunkie" Knudsen, then General Manager of GM's Pontiac division, directed his engineers to inject more performance into his brand's line of V8-powered automobiles. Fuel injection was an option, but hot rodders flocked instead to Tri-Power (marketed way back when with a hyphen), which grafted a trio of two-barrel Rochester carburetors onto a single intake manifold. A legend was born. And that legend was born of performance. At idle and when full power wasn't required, Pontiac's Tri-Power system used just the middle carburetor, which helped make the setup easier to tune. Depending on the year and model, either a vacuum system or a mechanical linkage opened up the two outer carbs, thereby switching from two barrels to six, and allowing the engine to take in more fuel and air. And it was an easy marketing win – six barrels is better than four barrels, right? Because performance! So, when news filtered in that GM has resurrected the Tripower name, those of us who grew up attending classic car shows and wrenching on old Pontiacs did a double-take. And then we all collectively sighed. Turns out that today's Tripower refers to a trio of fuel-saving measures that include cylinder deactivation, active thermal management, and intake valve lift control, according to Automotive News. And, at least for now, it applies to GM's line of fullsize trucks powered by a 2.7-liter turbocharged four-cylinder engine. We're all for saving fuel whenever possible. And we have zero say in how any automaker chooses to market its products and technologies. But, we'll offer our two cents anyway: Relaunching a storied name from the past is fine. Relaunching a storied name from the past while completely overlooking the reasons the name got famous in the first place is only going to irritate the people who remember the name in the first place. Couldn't they just call this new technology package something else? Related Video: News Source: Automotive NewsImage Credit: Getty Green Marketing/Advertising Chevrolet GM Pontiac Automotive History Truck chevrolet silverado

Recharge Wrap-up: Chevy Volt named KBB "Best Buy," slow BMW i3 sales in Germany

The Chevrolet Volt has been awarded Kelley Blue Book's Electric/Hybrid Car Best Buy for 2015. KBB cited the car's electric commuter capabilities, extended range, acceleration, design and overall value as reasons to place it above the Nissan Leaf, BMW i3 and Toyota Prius. It works well in the real world, and doesn't leave drivers with range anxiety. Plus, it's comfortable, and a fun car to drive, according to KBB. Read more at Kelley Blue Book. The BMW i3 is seeing slow sales in Germany. BMW has sold about half the number of i3s it expected in its home country, with about 1,900 sold in the first nine months. BMW projected sales of 5,000 to 6,000 in the first year. BMW partly blames long shipping times for the slow sales, and the company is offering incentives in hopes of getting more people to adopt the electric car. In the US, BMW sold more than 1,000 units each month between August and October. Read more at Green Car Reports. Audi is pursuing new carbon-neutral synthetic fuels - or e-fuels - such as Audi e-diesel. Audi's newest project uses electrolysis of water to create hydrogen, which it then reacts with CO2 extracted from the air. The result is a liquid - called Blue Crude - full of energy from hydrocarbon compounds. The Blue Crude can then be converted into a sulfur-free synthetic diesel called e-diesel. This e-diesel can be used as a drop-in fuel, blended into fossil diesel for a more renewable fuel. Read more at Hybrid Cars. Uber is partnering with Spotify to allow passengers to choose what music they listen to during their ride. Users will be able to choose their own playlist that will be ready and playing for them when they are picked up. It offers a more personalized experience from the ride-hailing service, which, according to Uber CEO Travis Kalanick, is "nirvana" for music lovers. Paying Spotify users will be able to use the feature initially in London, Los Angeles, Mexico City, Nashville, New York, San Francisco, Singapore, Stockholm, Sydney and Toronto. Check out the video below and read more at Wired. Featured Gallery 2014 Chevrolet Volt View 11 Photos Related Gallery 2014 BMW i3: First Drive View 33 Photos News Source: Kelley Blue Book, Green Car Reports, Hybrid Cars, WiredImage Credit: Chevrolet Green Audi BMW Chevrolet Transportation Alternatives Technology Emerging Technologies Electric Videos recharge wrapup