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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

Toyota unveils two new small displacement engines

Toyota introduced a pair of brand-new engines in Japan today, that it says will eventually spawn 14 different variants by 2015. Where these two engines stand out in today's world, is that neither mill boasts direct injection, and both are naturally aspirated.
The larger of the two is a 1.3-liter, while the smaller engine, a 1.0-liter, was developed in collaboration with Daihatsu. What makes these two unique is that they both use the Atkinson cycle. Now, we aren't going to bore you by explaining just what this is - there's Google for that. Suffice it to say, Atkinson engines are highly efficient, but that efficiency comes by sacrificing power. That's why they're so popular in hybrids, which can offset the power losses.
This focus on fuel efficiency extends throughout the new engines, which also benefit from tweaks like a cooled exhaust gas recirculation system and a trick intake port, while the 1.3 employs Toyota's iE variant of variable valve timing. Both engines can be fitted with stop-start tech. According to Toyota, when fitted with stop-start the 1.3 should provide around a 15-percent bump while the 1.0-liter will increase economy around 30 percent, when they arrive on the road.

Recharge Wrap-up: Toyota i-Road and COMS in France, Tesla tours Northeast, EV attitudes in UK

Toyota's i-ROAD and COMS teeny, tiny, city EVs are joining the Citelib carsharing fleet in Grenoble, France. The ultra-compact EVs, which will become available in October, are meant to supplement the Grenoble metropolitan area's existing public transit infrastructure, which includes trams, buses and trains. Toyota's i-ROAD and COMS will be connected to the transit systems IT infrastructure, allowing users to visualize their route on their smartphone or computer, and reserve and pay for their car before they get dropped off near the charging station (or the other way around). Then, the user finishes (or begins) their trip with one of the EVs. Surveys show that use of public transport is increasing in Europe, but most users still have to walk 15 minutes or so to reach their destination. Adding the i-ROAD and COMS carsharing service to their commute makes the trip into the city center quicker and more flexible, while keeping the air clean. See more below. Toyota is providing 70 vehicles to the Citelib program as part of a three-year test, while French energy company EDF is contributing 30 charging stations to the project. The i-ROAD is a three-wheeled EV that seats two people, and it features Active Lean technology for stability and comfort in the corners. Its footprint is about one-fourth that of a regular car. The four-wheeled COMS EV seats one, but also features a small storage compartment in the rear. The Tesla Model S is going on tour throughout the Northeastern US to give test drives to the public. Beginning July 4 in Montauk, NY, and ending August 30 in Vergennes, VT, people will get the chance to take a 15-minute spin in what many consider to be the best electric car available as part of Tesla's Fully Charged tour. If you live in New York, New Jersey, Massachusetts, Maine, Connecticut, New Hampshire or Vermont, the Model S may be coming to a town near you (check the schedule here) and you'll get the chance to drive the car with a product specialist in the passenger seat to answer your questions. You can even bring up to three guests in the back seat. So if you live in one of the states where Tesla can't sell cars or doesn't have a store, this is your chance to get to know the vehicle and decide if you want to buy one. Or you can just see what it feels like to silently go from 0-60 in 4.2 seconds (hint: it's pretty cool). A UK Survey shows five percent of people there are considering buying an electric vehicle.