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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.

Chevy, Lincoln dealers say they still want sedans

Detroit automakers have famously turned their backs on sedans as they make the strategic bet to double down on money-making trucks and SUVs, but dealers for at least two American brands are giving the companies contrary signals. In separate recent interviews with leading national dealer councils for Chevrolet and Lincoln, Automotive News reports that both brands’ dealers still see a need for cars. The publication published a Q&A interview with Mike Bowsher, chairman of the Chevrolet National Dealer Council, who said Chevy dealers managed to hold onto market share last year despite the phase-out of the Cruze compact sedan and hatchback, thanks to products like the Spark and Sonic subcompacts and the Trax and Equinox crossovers. But, he acknowledged, “We do feel like we could use a car, especially in the low-MSRP range.” The comments follow similar recent comments from Tom Lynch, who chairs the Lincoln National Dealer Council. He told AN, “If weÂ’re not in segments where there is still a good amount of business, I think the company and the dealers lose out.” The Cruze was one of the victims of GMÂ’s November 2018 announcement of plant closures, with production having ceased with the closure of GMÂ’s Lordstown, Ohio assembly plant last year. GM sold 47,975 Cruzes in 2019 but a healthy 142,617 in 2018. At Lincoln, Lynch said the council has been telling the company it needs to stick with the sedan segment, despite plans to kill the MKZ sedan in the coming months and unconfirmed reports that the Continental isnÂ’t long for this world, either, despite the buzz of the suicide-door Coach Door Edition, shown in the photo above. Lincoln sold 17,725 MKZs and 6,586 Continental sedans in 2019, down a combined 15%, but still good for almost 22% of overall Lincoln sales. It's worth noting that Lincoln competes in a luxury segment that still expresses allegiance to four- and two-door cars. Even Cadillac, its cross-town rival, is staying active with the upcoming CT5 and CT4 sedans. Lynch pointed to Tesla as evidence that strong sedan products can resonate with consumers, though he conceded that “What that looks like for Lincoln going forward, IÂ’m not sure of.” For now, anyway, Chevy still offers the Sonic and Spark subcompacts, the latter of which saw sales climb 32.5% in 2019 to 31,281 (Sonic sales fell nearly as steeply).

GM invests $24 million to build more crew cab trucks in Fort Wayne

The full-size pickup truck arms race continues unabated here in the United States as Ford, General Motors and Fiat Chrysler battle back and forth for sales supremacy. The Ford F-Series of trucks continues to lead the field in sales (214,611 units sold through the first quarter of 2019), but the race for second place has been a lot more interesting to watch. That's because Ram, long a distant third in truck sales, eked its way past Chevrolet late in 2018 and has managed to hold the position so far in 2019. Don't take this to mean that sales of GM's trucks have been poor across the board. In fact, the automaker reports that sales of its four-door crew cab pickups are up 20 percent in 2019 over the same period a year ago. And that's what makes GM's announcement today so interesting. The automaker is investing $24 million into its assembly plant in Fort Wayne, Indiana to build more Chevy Silverado and GMC Sierra pickup trucks, and the focus will continue to be on crew cab models. "We are building Chevrolet and GMC crew cab pickups at record volume and mix levels to meet customer demand and the $24 million investment will allow us to build even more," said GM chief Mary Barra in a statement. "Crew cab sales have been very strong, and we are expanding customer choice with new models, more cab choices and innovative new powertrains." It's worth noting that, if crew cab sales are up 20% this year, but overall sales are down (over 15% for Silverado and around 2% for GMC), that means it's the cheaper regular cab and double cab models that are lagging. At the same time, sales of the midsize Chevy Colorado have surged 16%. And finally, if you combine sales of the Silverado and Sierra into one bucket, GM still has a comfortable lead over Ram overall. If there's a takeaway here, it's that trucks of all shapes and sizes have been, currently are and will surely remain hot in America, and automakers will continue to invest money into making sure they are able to satiate consumer demand.