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7 major automakers to build open EV charging network

A new joint venture established by BMW, GM, Honda, Hyundai, Kia, Mercedes-Benz and Stellantis will build a new North American electric vehicle charging network on a scale designed to compete with Tesla's industry-benchmark Supercharger network. The 30,000-plus planned new chargers will accommodate both Tesla's almost-standard North American Charging System (NACS) and existing automakers' Combined Charging System (CCS) options, effectively guaranteeing compatibility with the vast majority of current and upcoming electric models — whether they're from one of the involved automakers or not.  "With the generational investments in public charging being implemented on the Federal and State level, the joint venture will leverage public and private funds to accelerate the installation of high-powered charging for customers. The new charging stations will be accessible to all battery-powered electric vehicles from any automaker using Combined Charging System (CCS) or North American Charging Standard (NACS) and are expected to meet or exceed the spirit and requirements of the U.S. National Electric Vehicle Infrastructure (NEVI) program." Critically, the automakers involved will have a say in how the charging tech is implemented, guaranteeing that the hardware will play nicely with each automaker's in-house charging systems. Hyundai and Kia, for example, were hesitant to jump on board the Tesla NACS bandwagon earlier this year over concerns that the Supercharger network is insufficient for powering the two automakers' 800-volt charging systems; similar tech is used by Volkswagen and Porsche.  In addition to providing much-needed capacity and high-output charging for America's growing fleet of electric cars and trucks, the new network will integrate seamlessly with each automaker's in-app and in-vehicle features, rather than forcing customers to use third-party tools and payment systems, as is the case with some existing public charging infrastructure.  "The functions and services of the network will allow for seamless integration with participating automakersÂ’ in-vehicle and in-app experiences, including reservations, intelligent route planning and navigation, payment applications, transparent energy management and more. In addition, the network will leverage Plug & Charge technology to further enhance the customer experience," the announcement said.

Fullsize GM SUVs have a problem that's making owners sick

Some fullsize SUV owners are getting sick, thanks to a buffeting and vibration problem in 2015 model year examples of the Chevy Tahoe and Suburban, Cadillac Escalade, and GMC Yukon. According to owners' complaints to the National Highway Traffic Safety Administration, the issue can vary from an annoying vibration inside the cabin to an experience so severe that it leads to dizziness and headaches. General Motors is aware of the complaints, but the fix isn't so simple. According to spokesperson Tom Wilkinson to Autoblog, the company "has been tracking this issue for a while." The problem has a fairly low incidence rate, but when it does occur the issue can be "uncomfortable and annoying for owners." There's no precise cause for the issue, Wilkinson claims, and in some cases, simply balancing the tires or changing the door seals can make it go away. However, not all of the fixes are so simple. AutoGuide dug deep into the problem and discovered a GM preliminary information bulletin that advised dealers to remove the headliner and to check the roof's bonds to the bows that go across the vehicle. However, that document included a note that the solution might not entirely eliminate things. According to AutoGuide, adding Dynamat insulation to the roof sometimes helped the problem. A GM spokesperson also told AutoGuide the company fixed the problem at the end of the 2015 model year, and didn't go into any more detail. This roof issue seems linked to some of the worst droning in these SUVs. According to one complaint from a 2015 Suburban owner to NHTSA: "Roof will not remain attached to the roof bows. This causes the buffeting similar to a window being down when all are up. The results span from annoying to painful." A 2015 Yukon owner claims to have another alleged cause for the problem in a NHTSA complaint from February 2015. This person brought their SUV to the dealer seven times over the course of four weeks for vibrations. The dealer replaced the driveshaft, suspension components, and more, but nothing worked. According to an engineer to the service adviser: "In an effort to prevent roll overs, they designed the frame and body mounts too stiff. There are 40 engineers working on issues, they have no solutions that work across the board." Wilkinson told Autoblog that GM is working with customers on an individual basis to rectify things. Since these are newer vehicles, dealers should also fix the problem under warranty.

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.