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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.

2016 Chevy Malibu gets premium looks, hybrid model

The Chevrolet Malibu was once an automotive icon, but its modern reputation is one for underachievement. A new 2016 model seeks to restore the storied nameplate with improved styling, more interior room and a new hybrid version. It debuts Wednesday at the New York Auto Show. Put simply, "the goal was to put Chevrolet back in the midsize car segment," said John Cafaro, the brand's executive director of car design. In a crowded arena with 2.2 million sales up for grabs annually, Chevy has not been a player. Last year, the brand sold 188,519 Malibus, a six-percent decline from 2013, and fewer than half the number of Toyota Camrys and Honda Accords sold. Despite awards from J.D. Power and Associates and the Insurance Institute for Highway Safety, Chevy knew the Malibu needed a big change. New Skin, Lighter Bones The redesign has been in the works for at least three years. Although the Malibu is still based on GM's Epsilon 2 platform, the underpinnings are more derivative of the Impala than the outgoing model. The body structure makes greater use of high-strength steel, which helps reduce weight by 300 pounds. Size is more Impala-like as well, with 2.3 inches more overall length and a 3.6-inch wheelbase stretch contributing to greater interior space. A new skin covers the Malibu's lighter bones, and design language from the Impala gives its sibling sedan a fresher, more upscale appearance. To execute this premium appearance, Chevy turned to 25-year-old designer Jaymer Starbody, a four-year General Motors veteran and graduate from Detroit's College for Creative Studies. He described the new Malibu as having a "wheel-oriented" design, and the car looks poised to pounce from certain angles. Though the 2016 Malibu is the same width as before, designers stretched the creases and angles in the sheetmetal to create a flatter, sleeker appearance. The hood and cowl are lower, and the Malibu's face sparkles with LED running lamps on the top trim levels. Inside, the roomier cabin has a new center stack, satin chrome accents on the interior panel and a console storage area designed for mobile devices. Chevy MyLink with a seven-inch color touchscreen is standard on lower trims, and the top model upgrades to an eight-inch screen. Perforated leather seats and ambient lighting are also available options. The cabin was designed to look high-tech, but still remain easy to use, according to Chevy interior design director Crystal Windham.

Poor headlights cause 40 cars to miss IIHS Top Safety Pick rating

Over the past few months, we've noticed a number of cars and SUVs that have come incredibly close to earning one of the IIHS's highest accolades, the Top Safety Pick rating. They have great crash test scores and solid automatic emergency braking and forward collision warning systems. What trips them up is headlights. That got us wondering, how many vehicles are there that are coming up short because they don't have headlights that meet the organization's criteria for an "Acceptable" or "Good" rating. This is a revision made after 2017, a year in which headlights weren't factored in for this specific award. This is also why why some vehicles, such as the Ford F-150, might have had the award last year, but have lost it for this year. We reached out to someone at IIHS to find out. He responded with the following car models. Depending on how you count, a whopping 40 models crash well enough to receive the rating, but don't get it because their headlights are either "Poor" or "Marginal." We say depending on how you count because the IIHS actual counts truck body styles differently, and the Infiniti Q70 is a special case. Apparently the version of the Q70 that has good headlights doesn't have adequate forward collision prevention technology. And the one that has good forward collision tech doesn't have good enough headlights. We've provided the entire list of vehicles below in alphabetical order. Interestingly, it seems the Volkswagen Group is having the most difficulty providing good headlights with its otherwise safe cars. It had the most models on the list at 9 split between Audi and Volkswagen. GM is next in line with 7 models. It is worth noting again that though these vehicles have subpar headlights and don't quite earn Top Safety Pick awards, that doesn't mean they're unsafe. They all score well enough in crash testing and forward collision prevention that they would get the coveted award if the lights were better.