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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.

Porsche and Buick earn top honors in J.D. Power Sales Satisfaction Index Study

Customer satisfaction with car buying has been at a low point over the past few years, as price increases, inventory shortages, and COVID restrictions have complicated every part of the process. There are signs of improvement, however, as J.D. Power’s 2023 U.S. Sales Satisfaction Index Study showed that customer satisfaction has improved slightly from a year ago. J.D. Power rates satisfaction on a 1,000-point scale, finding that it improved seven points to 793 from last year. Improving inventory levels and a slow leveling off of prices have contributed to that improvement, and fewer people are paying above MSRP for new cars. Some auto brands performed better than others with sales satisfaction. Porsche ranked highest among premium brands, followed by Alfa Romeo. Buick took the top spot among mass-market brands, with GMC, Chevrolet, and Mitsubishi behind. J.D. Power also handed out segment-level awards: Premium Cars: Porsche Premium SUV: Porsche Mass-Market Car: Chevrolet Mass-Market SUV/Minivan: GMC Mass-Market Truck: GMC Despite the increase in sales satisfaction, thereÂ’s still room for improvement to reach pre-pandemic levels. J.D. Power noted gaps in salesperson knowledge as an area of improvement. Buyers rated salespeople much better during a gas vehicle purchase than with EVs, citing their expertise as a challenge. Pricing remains a challenge despite an improvement since 2022, and satisfaction is still below pre-pandemic levels. Mass-market buyers reported a slight bump in satisfaction, while premium buyers felt that pricing was less fair than a year before. ItÂ’s an interesting contrast, showing that dealer pricing tactics can significantly impact satisfaction with the sales process. Fewer people may be paying more than MSRP, but several premium models still list with significant markups. Even more interesting is PorscheÂ’s top spot on the satisfaction list, as its cars often sell with huge upcharges, and itÂ’s exceedingly tricky even to get a build allocation for some models. Buick Chevrolet GMC Porsche Car Buying Ownership

Recharge Wrap-up: Lexus CT 200h is NWAPA's favorite hybrid, 'No Charge to Charge' in LA

The Northwest Automotive Press Association (NWAPA) has given the Lexus CT 200h its Favorite Hybrid title. It named the compact luxury hybrid its favorite of 2014 at its Drive Revolution in Portland (where it also named the new Volkswagen Golf TDI the Northwest Green Car of the Year). According to NWAPA president Nik Miles, the CT 200h earned the honor for "impressive combination of state-of-the-art small car luxury and hybrid technology." For 2014, the Lexus CT200h got an updated front end, including the spindle grille we've been seeing on new Lexus vehicles, plus a redesigned steering wheel and sliding sun visors. Read more in the press release below. Chevrolet credits the Malibu for helping make stop-start mainstream. Chevrolet started including stop-start technology standard in Malibus equipped with the four-cylinder engine. Chevy has sold about 83,000 of that model, so 97 percent of 2014 and 2015 Malibu sales include stop-start. Now, that technology has made its way into the 2015 Impala. With drivers idling an average of 16 minutes a day, stop-start can significantly reduce harmful emissions and save fuel. According to Navigant Research, we can expect annual sales of cars equipped with stop-start technology to surpass 55 million by 2022. Read more in the press release below. Nissan Leaf customers in Los Angeles will get access to free charging beginning August 15. Nissan is extending its "No Charge to Charge" promotion to LA, which will allow customers to charge at public charging stations at no cost. Leaf customers - including those who bought or leased their car from the participating dealerships on or after July 1 - will get an EZ-Charge card, allowing them to use ChargePoint, Blink, CarCharging, AeroVironment and NRG eVgo chargers for free. Rapid chargers can charge the Leaf's battery to 80 percent in 30 minutes. Nissan plans to offer the "No Charge to Charge" in at least 14 more markets in the US, bringing the total to 25, within the next year. See the press release below for more details. California will get six all-electric school buses for three school districts as part of a demonstration program. The California Energy Commission awarded a grant of $1.4 million for the program to National Strategies LLC; this is in addition to a $2.2-million grant from the South Coast Air Quality Management District. The EV buses use vehicle-to-grid technology, allowing them to sell energy back to the grid when it is needed.