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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

Lexus planning a hydrogen fuel-cell LS by 2017

Toyota's Fuel Cell System will certainly migrate to other vehicles in the carmaker's lineup, but Australian car site Motoring reports that one of the models at the head of the queue is the Lexus LS. According to its sources, the executive barge powered by hydrogen will be released by 2017 and take the top spot in the range, rolling in above the LS Hybrid. We're told that Toyota engineers will find a way to slide two hydrogen tanks into its bodywork with the same general setup as on the Mirai – one under the rear seats and another under the rear parcel shelf. The 150-kW fuel cell stack will be placed under the front seats. Motoring says the resulting sedan and its 220-kW electric motor would come in "at around 2,100 kg," which is 4,620 pounds; that's a ginormous 539 pounds less than the listed curb weight of the current LS Hybrid, and 387 pounds more than the standard LS. Assuming all goes as planned, it would have a range of roughly 238 miles, a few dozens less than the Mirai's range of about 300 miles. It would look slightly different, too, the front end getting larger intakes to cool the power unit. It wouldn't surprise us if Lexus does have a hydrogen LS planned – it would be a statement car, and the company likes making statements, even if few heed them; it has stuck with its LS 600h for the past seven years, yet of the 7,539 LS models sold through the end of November this year, only 61 of them were hybrids. The timing would be intriguing, however; by the time the LS hybrid came out, Lexus had already worked over its filet-and-potatoes models. And if the hydrogen version is going to come in above the $120,440 hybrid, well, that will be a statement indeed.

2013 Toyota Avalon Hybrid

People, us included, make a big stink about the importance of family sedans. There's no doubt they're critical - they represent a huge slice of the market's annual sales and profits. However, despite accounting for far fewer transactions than the midsize sedan segment, the fullsize sedan is getting attention from manufacturers now that our market's entire lineup of those (slightly) smaller four-doors has turned over in the last two years or so. As most of the fullsize segment's mainstays derive a fair bit of their platform and powertrain technologies from their midsize cousins, these larger four-doors offer the potential for fatter profit margins, too. And with the newly stylish duds found on many of the industry's most successful midsize sedans, it's only right that automakers no longer think about fullsizers as big, squishy, vanilla family haulers with flat seats, vague steering and a thin layer of 'luxury' in the form of faux wood trim.
As manufacturers have again started diving into large sedans feet-first, the cars themselves have become sharper. The interiors are now of a higher quality and loaded with tech, while the exteriors have become further extensions of each manufacturer's design language. There's perhaps no greater example of this than the Chevrolet Impala and Ford Taurus, two models that evolved from subpar offerings into market leaders. This segment-wide transformation happened quite quickly, whether because of coincidental timing or because manufacturers are trying to get more out of their big cars, recognizing they account for a small portion of overall sales (just 3.5 percent of the new-car market in the first half of 2013).
The 2013 Toyota Avalon Hybrid is one such vehicle. We remarked on the changes to the V6 variant last year, and while we previously had a quick steer of the gas-electric hybrid, we figured the new model was worth a closer week-long look.