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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: Phoenix Cars delivers ZEUS to Navy, Volt saves gas compared to i-MiEV

Phoenix Cars has delivered its first Zero Emissions Utility Shuttle (ZEUS) flatbed truck to the US Navy. The electric flatbed will be used to transport maintenance materials around Naval Base Ventura County Port Hueneme. The Phoenix ZEUS features a 100-mile range, and can charge in just three hours. It also features vehicle-to-grid technology and direct power capability, allowing it to function as a mobile power station. ZEUS customers enjoy an eight-year/300,000-mile battery warranty and round-the-clock technical support from Phoenix. Phoenix launched an electric passenger shuttle last year, and years ago worked on an electric sport utility truck before shifting over to larger vehicles. Read more in the press release from Phoenix Cars. A man found that he used less gas by trading in his Mitsubishi i-MiEV for a Chevrolet Volt. Ben Rich saved fuel in part by using his Volt for road trips rather than needing to rent cars. Rich also found other benefits to driving a Volt, including more comfort, more freedom of movement and less range anxiety. Rich often had to turn off the heat in the winter to eke out precious miles in the Mitsubishi, which he needn't do in the Chevy, though he did have a gripe about the Volt using the gas motor to warm the car. Read more at Green Car Reports. EV drivers using the ChargePoint network have traveled over 196 million miles without gasoline. ChargePoint has tallied over 9 million charging sessions for a total of 65 gigawatt hours of energy. Based on national efficiency averages of three miles per kWh and 23.9 miles per gallon, this has saved 8.2 million gallons of gasoline and 60 million pounds of CO2. This accounts for what ChargePoint calls a "huge environmental impact." Read more in the release from ChargePoint below. The Environmental Impact of ChargePoint Drivers Campbell, Calif.– We all know electric vehicles (EV) have enormous environmental advantages over gas vehicles. Plug-in EVs reduce carbon-based greenhouse gases, improve air quality and reduce our dependence on fossil fuels. EV drivers on the ChargePoint network have had a huge environmental impact. With over 9 million charging sessions delivering 65 gigawatt hours of energy, EV drivers have avoided over 60 million pounds of CO2 and 8.2 million gallons of gasoline, and driven over 196 million gas-free miles. *Based on national averages: EV efficiency of 3 miles per kWh, gas efficiency of 23.9 mpg and a net savings of 0.924 pounds of CO2 per kWh.

Should heavy-duty pickup trucks have window stickers with fuel mileage estimates?

If you were to stroll into your nearest Chevrolet, Ford, GMC, Nissan, or Ram dealership, you'd find a bunch of pickup trucks. Most of those would have proper window stickers labeled with things like base prices, options prices, location of manufacture, and, crucially, fuel economy estimates. But you'd also run across a number of heavy-duty trucks with no such fuel mileage data from the Environmental Protection Agency. The EPA doesn't require automakers to publish the valuable miles-per-gallon measurement for vehicles with gross weight ratings that exceed 8,500 pounds. That makes it difficult for consumers to compare behemoths powered by turbocharged diesel engines – between one another, and between smaller, gasoline-fueled trucks. Consumer Reports doesn't think it should be this way, and it's spearheading an effort (PDF link) to get the government to require manufacturers to publish fuel economy estimates. In its own testing, CR found that heavy-duty pickups powered by Ford's Power Stroke, GM's Duramax, and FCA's Cummins diesel engines (which doesn't include the Ram's EcoDiesel) get worse fuel mileage than their lighter-duty gas-powered siblings. We're not so sure HD-truck buyers are unaware of this fact – big diesels don't really come into their own until big loads are placed in their beds or attached to their trailer hitches. Under heavy workloads, the diesel trucks will almost certainly return greater efficiency than a similar gas-powered truck. What's more, HD trucks with lumbering diesels in general make the driver feel more confident while towing due to greater torque at low engine RPM than gas trucks. They also offer greater max-weight limits. Still, we agree EPA fuel mileage estimates should be offered for heavy-duty pickups. And we think the comparisons provided by Consumer Reports might be interesting to potential buyers. Click here to see the results of CR's tests, and let us know what you think using the poll below. Related Video: Featured Gallery 2017 Ford F-Series Super Duty: First Drive View 22 Photos News Source: Consumer Reports Government/Legal Green Read This Chevrolet Ford GMC Nissan RAM Fuel Efficiency Truck Commercial Vehicles Diesel Vehicles poll gmc sierra hd chevy silverado hd