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Toyota to buck engine downsizing trend, may go larger and turbo-free

Turbocharging isn't really Toyota's specialty, and the Japanese automaker isn't being shy about acknowledging it. Koei Saga, a senior managing officer in charge of drivetrain research and development, says that eschewing turbos and increasing displacement of engines using the Atkinson cycle can produce better power gains without sacrificing fuel economy, Automotive News reports.
Toyota is investing heavily in larger-displacement Atkinson-cycle engines in addition to turbocharged engines, but Saga doesn't think the automaker will use turbocharging across many product lines. He apparently remains unconvinced that the technology "makes the world better."
In Toyota's eyes then, Atkinson cycle engines do make the world better, and here's how. Their pistons complete four processes - intake, compression, power and exhaust - in one revolution of the crankshaft, and the power stroke is longer than the compression stroke. Traditional Otto cycle engines require two crankshaft revolutions to accomplish those same four operations and have equal-length compression and power strokes. Atkinson cycle engines are more efficient, but less power dense, though increasing displacement can offset that shortfall.

New Toyota Mirai videos continue questionable hydrogen claims

"Toyota engineers were simultaneously working on a brand new technology that met all the driver's needs with an even smaller carbon footprint." Toyota has released a number of new promotional videos for the hydrogen-powered 2016 Mirai. Most are exactly what you'd expect: pretty, full of promise and vaguely informational. But there was one line in the Product Introduction video that caught out ear. In the Product Information video about the Mirai, the narrator goes into a short history of Toyota's green car advances. After talking about the Prius and the Prius Plug In, making EVs for urban commuting and the rest of Toyota's advanced fuel programs, we hear this: "Never satisfied though, Toyota engineers were simultaneously working on a brand new technology that met all the driver's needs with an even smaller carbon footprint, one that took its lead from nature itself." You can watch the video (and four others) below. Plug In America co-founder Paul Scott told AutoblogGreen, "Show us the math! Toyota claims the FCV has a smaller carbon footprint than their EV, but every paper I've read indicates the FCV uses 3-4 times as much energy to travel a given distance as an EV. If they are making this claim, let's call them out to prove it. Show us the math!" There's some math that comes out in favor of EVs here and here. "BEVs and FCs have a very similar carbon footprint, dependent on fuel source." – Toyota's Jana Hartline Plug-in vehicle advocate Chelsea Sexton went further. "Assuming appropriate comparisons in energy feedstock, basic science doesn't support the notion that the footprint of an FCV is smaller than that of an EV," she told AutoblogGreen, explaining that "appropriate comparison" would mean using similar energy generation methods for both hydrogen and plug-in vehicles. Not the tendency, she noted, "of H2 fans to compare FCVs based on solar-based electrolysis to EVs running on coal-bases electricity and similar shenanigans." Besides, Sexton said, "focusing purely on efficiencies entirely misses the biggest struggles that FCVs face in the market, namely fuel price, inconvenience, and market fear, even if the vehicles themselves are initially subsidized.

Toyota Harrier gets a whale of a facelift [w/video]

Historically, the Toyota Harrier has been a doppelgänger for North America's Lexus RX - at some points, it was little more than a badge-swap and a few options away, at least aesthetically. That appears to be changing with this just-revealed new generation at the Tokyo Motor Show.
That's because this two-row, five-seat Toyota is in possession of a bold new look, dominated by a jutting, baleen-like grille edged in chrome, along with new headlamps and fascia. The greenhouse has likewise been revamped and gotten more pointed at the rump, which has new taillights, a resurfaced tailgate and a faux rear diffuser. Were it to be ported over to North American Lexus dealers intact, the Harrier's look would be jarring in light of the brand's spindle-grille-based design language, so we suspect that if the RX gets any of these updates (it was just refreshed for 2013), it will strike out on a different path visually.
Unlike the US RX, the new Harrier will rely on smaller-displacement four-cylinder engines, namely a 2.0-liter paired with a continuously variable transmission or a 2.5-liter four backed up by an electric motor. We'd like to see a smaller-displacement option for the US RX (it presently runs with 3.5-liter V6 engines in both gas-only and hybrid guise), but suspect it won't arrive until the next all-new model.