1989 Chevrolet Cheyenne R3500 Mason Dump on 2040-cars

Auto blog

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.

Chevrolet Malibu could last until 2024 before joining the dodo

Automotive News pieced together all available intel on the Chevrolet and GMC lineups, trying to ascertain how much life each model might have left. Concerning the Chevrolet Malibu, the answer is not too much, and the historic nameplate's final years don't look like the glory kind. After a major overhaul in 2016 boosted sales for the ninth-generation sedan to 227,881 units, the 2018 sales fell to 144,542, and this year's are down almost 15% through the end of June. The Malibu is one of two Chevrolet sedans still breathing - the other being the Impala for now - but only for about five more years. AN says there'll likely be a refresh in 2022, followed by a visit from the Reaper in 2024. After that, it could be "indirectly replaced" by an electric vehicle, one of the 23 EVs that GM is working on for 2023.     The Impala will meet the ax earlier despite a recent stay of execution. Production is still set to close in January 2020. In the entire GM stable, Cadillac might soon be the only marque with sedans. The Buick LaCrosse has a date with death, and Groupe PSA won't supply Opels-as-Regals forever.  The Sonic hatchback should say goodbye at the end of 2020, a year before the seemingly eternal Spark is thought to die. Two years after that, according to one report, the Camaro will go back into cold storage, perhaps forever, and AN says an "expected redesign of the car in 2021 was reportedly canceled." Finally, let's give one final shout-out to the Chevrolet Cruze, a global nameplate, which in the United States alone outsells the Malibu, outsold the Camaro by a factor of three last year, and absolutely trounces the Impala, Sonic, and Spark. Even that couldn't get a stay of execution. In more uplifting news, everything's happening on the crossover and truck side in the next few years. The Chevy Bolt is due for a refresh next year, even though it has "become more important for self-driving ride-hailing fleets that GM Cruise plans to operate than for consumers." In 2021, the Bolt-based crossover should bow, first in China, then here. It's said to look like "a mix of the Bolt and Trax" in spy shots. Still waiting for a green light: a possible subcompact GMC crossover called Granite that might make it to market by 2023. The full-sized SUV triplets Tahoe, Suburban, and Yukon could show their new faces in 2020. The Silverado might get an updated interior in 2020 or 2021, while the Colorado and Canyon mid-sized pickups won't get attention until perhaps 2023.

Chevy Volt sales drop in June, Nissan Leaf inches upwards

Different month, same story. That's the gist of the monthly US sales numbers from the Chevy Volt and the Nissan Leaf. These were the first two mass-market plug-in vehicles to go on sale in the US and we've been comparing their sales numbers for what seems like ages now. So far, the 2014 tale of the tape shows the all-electric once again trumping the plug-in hybrid. The last time the Volt outsold the Leaf was in October 2013. Chevrolet sold 1,777 Volts in June. That was good enough to be the Volt's best sales month of the year, but it's down 34 percent from the 2,698 units sold in June 2013. In fact, it's on par with the 1,760 Volts sold in June 2012. Given the steady sales, General Motors might need to push up the release of the next-gen Volt to gin up excitement, especially if it also offers some of the things that current Volt drivers say they want improved: more range, a lower price and a fifth seat. GM also said it sold 85 Spark EVs in June, an increase of 215 percent over June 2013 Nissan sold 2,347 Leafs last month. The good news continues for Nissan, which says it sold 2,347 Leafs last month. That's an increase of 5.5 percent over 2013 numbers and makes 2014 the best June ever for Leaf sales. Let's credit Texas. Toby Perry, Nissan's director of EV sales and marketing, said in a statement that, "Since the Texas state incentive went into effect in May, we've seen a big jump in Leaf sales in the Austin, Dallas and Houston markets. Our dealers are telling us that they saw more traffic in their stores, and they had their best Leaf sales performance in the last weekend in June." Even with that increase, Atlanta remains the top Leaf market. Nissan has sold 12,736 Leafs in the US so far this year; Chevy 8,615 Volts. Our detailed monthly sales write-up of green cars in the US, including plug-in vehicles, hybrids and diesel cars, is coming soon. For now, we invite you to discuss these numbers in the Comments. Related Gallery 2013 Nissan Leaf View 55 Photos News Source: GM, Nissan Green Chevrolet Nissan Electric Hybrid PHEV ev sales