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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: Mirai earns Toyota "Most Innovative" honor, Tesla cold-weather range

A Tesla driver has graphed the effect of cold weather on the driving range of his Model S. Rob at Teslarati kept track of the amount of miles driven and energy used and mapped that against temperature readings to find how the colder temperatures affect efficiency. The results were an average of 10 miles of range lost for every 10-degree drop in temperature. Also, he calculated that drivers will lose about 25 percent more range when the roads are slippery. Read more at Teslarati. Albany Engineered Composites (AEC) is teaming with automotive engineering and consulting company Ricardo to provide lightweight components to the automotive industry. AEC produces composites for the aerospace industry, and having proven themselves in that field, they show promise for helping automakers make their cars lighter and more efficient without sacrificing structural integrity. "The agreement announced today is excellent news for our global automotive customers as we work to find further weight reductions in vehicles to meet future CO2 reductions," says Ricardo CEO Mark Garrett. With carbon composite prices expected to drop, Garrett believes this is an "attractive solution" for structural components. Read more at Ricardo's website. Toyota Motor Europe (TME) wants to recover all of its hybrid batteries for remanufacturing. TME currently recovers 91 percent of Toyota and Lexus batteries at the end of the vehicles' lives through dealerships, and is now working with independent end-of-life vehicle treatment operators to recover the rest. Beyond just being recycled, Toyota is looking into remanufacturing batteries for other vehicles or for stationary energy storage systems. Read more in the press release below. Fast Company Magazine has recognized Toyota as one of the 50 Most Innovative Companies for 2015 for its Mirai fuel cell sedan. "Toyota plans to do for fuel cells what its Prius did for hybrids: make them ubiquitous and top of mind for environmentally conscious consumers," says Fast Company. The article also notes that Toyota has also made its fuel cell patent public and invested in hydrogen fueling infrastructure. Toyota is ranked number 18 in the Most Innovative list, just below Tesla. Read more at Fast Company.

How to fix a $4,000 hybrid battery problem with vinegar and baking soda

This is one of those 'Don't try this at home if you don't know what you're doing' DIY tales. Two weeks after imgur user "scoodidabop" bought a used Toyota Camry Hybrid with no warranty, he got the Christmas Tree dash display with warnings like "Check VSC System," "Check Hybrid System," and the Check Engine light. After some Internet sleuthing he figured it could be a faulty brake actuator, assuming the hybrid system warning was a false alarm. But it wasn't the actuator, it was the battery, a Toyota dealer telling him that his battery had "gone bad," and he'd need $4,457 to replace it. Then he had a brainstorm: it could be one of the cells that's gone bad, not the whole battery. Scoodidabop has some experience as an electrician, so he figured he could test it and replace any bad cells for about $45 apiece. He removed the battery unit from the trunk and over the course of two hours tested all 68 cells four times. He found nothing wrong. So he devised another type of test and checked every cell again. He couldn't find a problem with any of them. Turns out the problem wasn't in the cells, but with the dirty and corroded copper connectors at the ends of the high-voltage cables. He pulled the 34 connectors and their steel nuts, soaked them in vinegar, gave them a light steel wool scrub, soaked them in baking soda and water to counteract the vinegar, applied an anticorrosive and reinstalled them. That took an hour. When he replaced the battery, the warning lights had all gone out and the battery worked perfectly. Skill level: experience. Cost: less than $10. Perhaps it's time for hybrids to be able to test their own cells individually. Dealers, too.