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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.

J.D. Power study identifies top seats for your tush

File under News your fanny can use: The seating systems in the Ford Escape and Edge, the Audi A3, Chevrolet Cruze, Kia Cadenza, Porsche Cayenne and Toyota Tundra received top marks in a new J.D. Power study on seating and seat belt quality and satisfaction. The J.D. Power 2017 Seat Quality and Satisfaction Study asked more than 77,000 new owners and lessees of 2017 model-year cars and light trucks to rate their vehicle's seats and seat belts within the first 90 days of taking ownership. The survey is broken up into seven vehicle segments and scored on total seat problems per 100 within each segment, with awards presented to the seating system supplier. Canadian auto supplier Magna won three of seven first-place awards for its seating systems in the A3, Escape and Edge. Ireland-based Adient got top marks for its seats in the Cadenza and Cayenne. Lear Corp. won for the Cruze, and Avanzar Interior Technologies scored highest for seats in the Tundra. J.D. Power says its study is intended for automakers and suppliers with quality and satisfaction information to be used in developing and marketing seating systems. "But the results are just as interesting to a consumer audience," the company says. "After all, some drivers spend a considerable amount of time behind the wheel, and it's helpful to know which vehicles offer the most comfortable seats for those long commutes." Ain't that the truth. Ford was the only automaker whose seat systems, both manufactured by Magna, received top honors in two segments: the Escape for mass-market compact SUV and the Edge for mass-market midsize/large SUV. J.D. Power says it used 22 attributes to measure seat quality, three measures of seat belt quality and 12 to measure satisfaction. Awards were presented to the seating suppliers. Related Video: Image Credit: Audi Auto News Design/Style Audi Chevrolet Ford Kia Porsche Toyota Safety JD Power seats

GM recalling 250,000 SUVs over door electronics

After a door-fire investigation that dates back to February, the National Highway Traffic Safety Administration has officially announced a recall today that affects around 250,000 General Motors SUVs for a faulty driver's door module. The recall applies to the Buick Rainier, Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender and Saab 9-7X from the 2006 and 2007 model years, as well as the 2006 Chevrolet Trailblazer EXT and GMC Envoy XL for vehicles sold and/or registered in the Snow Belt.
Road salt use in these midwestern and northern states can lead to corrosion of the driver's door module on these GMT360 and GMT370 vehicles, which allows water to come in contact with the circuit board. If shorted out, the vehicle's power door locks and power windows will not work, and could possibly lead to overheating and, in some circumstances, a fire. No official word on how many total vehicles caught on fire, but back in June, 28 fires had been reported to the government agency. A fix for the problem is still being worked out, but all affected vehicle owners will be notified by GM.
Scroll down for the official NHTSA statement.