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Nissan Leaf has outsold Chevy Volt by 50% so far in 2015

We know, we know. The Chevy Volt and Nissan Leaf sales numbers for mid- to late-2015 aren't all that meaningful because of the impending arrival of the next-gen Volt and the expected but not-yet-totally-confirmed debut of the second version of the Leaf. Nonetheless, tracking the sales of the first two major plug-in vehicles is something that remains interesting to us, if for nothing else that the all-electric Leaf remains slightly more popular than the plug-in hybrid Volt after all this time. If we just look at August, the numbers were basically tied in the US. Chevy sold 1,380 Volts while Nissan moved 1,393 Leafs. But when we take a 10,000-foot view, the differences starts to appear. So far in 2015, GM has sold 8,315 Chevy Volts while Nissan has sold 12,383 Leafs. That means that the Nissan has outsold the Chevy by around 50 percent (to be specific, it's 48.92 percent). Since the two vehicles went on sale in the US at roughly the same time at the end of 2010, 81,672 Volts have been sold, compared to 84,705 Leafs. That's a difference of only 3,033 vehicles, so proponents of both powertrains can hold their heads high. Looking just at last month, Volt sales were 45 percent lower compared to August 2014. So far this year, Volt sales are down 36.7 percent. The Leaf didn't fare any better. Month-to-month, Leaf sales were down 43.7 percent in August, while year-to-date, Leaf sales are down 65.3 percent. Those second-gen models can't come soon enough. As always, we'll have our broader wrap-up of monthly green car sales for August up soon. Stay tuned. Green Chevrolet Nissan Electric Hybrid ev sales

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.

GM cutting vehicle trim options to save money for electrification

Information continues to filter out about GM's plans based on comments the automaker made during its Capital Markets Day event in February. GM President Mark Reuss said the company's push to save money by rationalizing the number of build combinations will continue in 2020, carrying on the work done in 2019. As GM Authority covers, last year, the carmaker cut 3,500 components across model lines, a 12% drop in the number of parts it needed to stock in its plants. Reuss used the next-generation Chevolet Equinox and GMC Terrain as examples for more cost efficiencies, saying build possibilities — which include international markets and their options — will be cut by more than 50%, and use more shared parts. "We will reduce total trim levels on Equinox and Terrain from eight to six," Reuss said, "reduce engine variants from 11 to 5, reduce build combinations from more than 200 to less than 100 per program, and see significant cost savings of an already paid-for architecture that took the mass out, helping us self-fund electrification programs." GM will plow a large amount of the money it saves into its ambitious EV program. In 2017, the automaker said it intends to have 20 electric vehicles on the market by the end of 2023, some of which could be shared between brands. An automotive analyst at Seeking Alpha and a piece in Automobile attempted to put specifics to what we should expect. As Automobile points out, the first two EVs in the 20-car program are already on sale, being the Ariv Meld and Ariv Merge eBikes available in Belgium and The Netherlands. We've seen the Cruise Origin autonomous rideshare taxi, although we don't know when it will hit the road. The next three, which we should see in the metal shortly, are two Cadillac EVs and the GMC Hummer EV pickup. The Cadillac pair are expected to be sized like the XT4 and XT5, and along with the Hummer, should hit the market starting in late 2021.