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Toyota R&D shows off free piston engine linear generator for future EVs

We often hear how an electric vehicle powertrain architecture allows vehicle designers much more freedom than a traditional ICE powertrain does. With differently shaped battery modules and small electric motors, there are lots of way to put the pieces together. With today's plug-in hybrid technology, engineers still need to put a decent-sized ICE somewhere, but new technology from Toyota could free up the gas-electric vehicle designers of the future. Presented at the recent SAE World Congress in Detroit, the idea from Toyota Central R&D Labs Inc. and involves what is called a Free Piston Engine Linear Generator (FPEG). Think of it as a sort of one-cylinder, two-stroke mini-engine that can work either as a generator (thank to magnets and a linear coil) or to directly drive a vehicle. The current prototype is a 10-kW unit that Toyota say would provide enough power to get a B- or C-segment electric vehicle up to highway speeds (75 miles per hour) when paired up to offer 20 kW. Pairing the FPEGs is also important to minimize vibrations. One system tested by Toyota had a 42 percent thermal efficiency, but the engineers are working to improve the overall efficiency even further. You can watch an animated video of the piston in action here (click on "Outline") and see the SAE papers here and here. More technical details are available at Green Car Congress. News Source: Toyota Labs via Green Car CongressTip: Thanks, Joe V. Green Misc. Auto Shows Toyota Technology Emerging Technologies Electric generator

Recharge Wrap-up: Model X pinch sensor update, Karma plans first store

Tesla has improved Model X pinch sensor function in its latest over-the-air update. As we've seen, the pinch sensors already stop the falcon wing doors from completely shutting when they sense an obstruction. Now, though, the doors retract slightly after the sensors are triggered. While the pre-update doors didn't appear to do as much damage to human fingers as they do to various foodstuffs, it definitely looked uncomfortable, especially when one's hand is stuck in the partially closed door. Now, any pinch that does occur should be brief. See the updated sensors at work in the video above, and read more from Teslarati. Karma Automotive will move to Kawasaki's former headquarters in Irvine, California where it will also open its first store. The revival of the now defunct Fisker will sell its Revero plug-in hybrid through both dealerships and company-owned stores like the one planned for its new two-building campus. The property owner, Bixby, had planned to renovate the site, but now says Karma will make its own improvements. Bixby said it was seeking, "a progressive-minded tenant that would value the unique configuration," and appears to have found just that in Karma. Read more at Electrek, or from the OC Register. San Francisco is asking residents for help in expanding its subways. Using an online tool called Subway Vision, users can draw their own subway lines and stations that they'd like to see built and submit them to planners. Listening to the public is a useful tool for the city because, as Grahm Satterwhite, San Francisco Municipal Transportation Agency's principal planner, admits, "Transportation planners may be too close to a problem to see the solution." This approach allows the subway expansions to "reflect the vision of not just a few transportation planners, but of all San Franciscans," he says. Read more from FastCo.Exist. Toyota is continuing its commitment to Yellowstone National Park with a sustainable Youth Campus for environmental education. The automaker donated $1 million to Yellowstone for the facility, which is seeking Living Building Challenge certification. It will have onsite wastewater treatment for its locally sourced water usage, and will generate all of its electricity needs from photovoltaic panels, with excess to put back into the grid. The campus will have classrooms and residences for students and staff for its youth programs.

Toyota recalls another 2.9 million vehicles over Takata airbags

Subaru, Mitsubishi and Hino doing recalls, too.