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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.

Which electric cars can charge at a Tesla Supercharger?

The difference between Tesla charging and non-Tesla charging. Electrify America; Tesla Tesla's advantage has long been its charging technology and Supercharger network. Now, more and more automakers are switching to Tesla's charging tech. But there are a few things non-Tesla drivers need to know about charging at a Tesla station. A lot has hit the news cycle in recent months with regard to electric car drivers and where they can and can't plug in. The key factor in all of that? Whether automakers switched to Tesla's charging standard. More car companies are shifting to Tesla's charging tech in the hopes of boosting their customers' confidence in going electric.  Here's what it boils down to: If you currently drive a Tesla, you can keep charging at Tesla charging locations, which use the company's North American Charging Standard (NACS), which has long served it well. The chargers are thinner, more lightweight and easier to wrangle than other brands.  If you currently drive a non-Tesla EV, you have to charge at a non-Tesla charging station like that of Electrify America or EVgo — which use the Combined Charging System (CCS) — unless you stumble upon a Tesla charger already equipped with the Magic Dock adapter. For years, CCS tech dominated EVs from everyone but Tesla.  Starting next year, if you drive a non-Tesla EV (from the automakers that have announced they'll make the switch), you'll be able to charge at all Supercharger locations with an adapter. And by 2025, EVs from some automakers won't even need an adaptor.  Here's how to charge up, depending on which EV you have:  Ford 2021 Ford Mustang Mach-E. Tim Levin/Insider Ford was the earliest traditional automaker to team up with Tesla for its charging tech. Current Ford EV owners — those driving a Ford electric vehicle already fitted with a CCS port — will be able to use a Tesla-developed adapter to access Tesla Superchargers starting in the spring. That means that, if you own a Mustang Mach-E or Ford F-150 Lightning, you will need the adapter in order to use a Tesla station come 2024. But Ford will equip its future EVs with the NACS port starting in 2025 — eliminating the need for any adapter. Owners of new Ford EVs will be able to pull into a Supercharger station and juice up, no problem. General Motors Cadillac Lyriq. Cadillac GM will also allow its EV drivers to plug into Tesla stations.

The USPS needs 180,000 new delivery vehicles, automakers gearing up to bid

Winning the New York City Taxi of Tomorrow tender was a huge prize for Nissan, even though the company is still working through the process of claiming its prize. The United States Postal Service has begun the process to take bids for a new delivery vehicle to replace the all-too-familiar Grumman Long Life Vehicle, and that will be a much larger plum for the automaker who wins it, perhaps worth more than six billion dollars. The Grumman LLV is an aluminum body covering a Chevrolet S-10 pickup chassis and General Motors' Iron Duke four-cylinder engine. The USPS bought them from 1987 to 1994, and the 163,000 of them still in service are a monumental drain on postal resources: they get roughly ten miles to the gallon instead of the quoted 16 mpg, drink up more than $530 million in fuel each year, and their constant repair needs like the balky sliding door and leaky windshields have led the service to increase the annual maintenance budget from $100 million to $500 million. A seat belt is about as modern as it gets for safety technology, and the USPS says that assuming things stay the same, it can't afford to run them beyond 2017. Last year it put out two triage requests for proposals seeking 10,000 new chassis and drivetrains for the Grumman and 10,000 new vehicles. The LLV is also too small for the modern mail system in which package delivery is growing and letter delivery is declining. The service says it doesn't have a fixed idea of the ideal "next-generation delivery vehicles," but it listed a number of requirements in its initial request and is open to any proposal. Carriers have some suggestions, though, saying they want better cupholders, sun visors that they can stuff letters behind, a driver's compartment free of slits that can swallow mail, and a backup camera. The request for information sent to automakers pegs the tender at 180,000 vehicles that would cost between $25,000 and $35,000 apiece, and it will hold a conference on February 18 to answer questions about the contract. GM is the only domestic maker to avow an interest, while Ford and Fiat-Chrysler have remained cagey. Yet with a possible $6.3 billion up for grabs and some new vans for sale that would be advertised on every block in the country, we have a feeling everyone will be listening closely come February 18. We also have a feeling the LeMons series is going to be flooded with Grummans come 2017. News Source: Wall Street Journal, Automotive News - sub.