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Toyota finds 10% MPG improvement in hybrid PCU

Keeping up its from-all-angles approach to efficiency, Toyota has found yet another way to eke out up to ten percent more precious MPGs in its hybrid vehicles, this time electronically. The automaker has announced the development of new silicon carbide (SiC) power semiconductors for use in power control units, which it will begin testing on Japanese roads within the next year. The PCU using the silicon carbide compound offers less electrical resistance, which improves efficiency when passing current between the battery and electric motor. It also loses less power after shutting off, and can operate at a higher frequency. The net power loss of the new PCU is just one-tenth of the current silicone-only version (the latter accounting for 20 percent of total electrical power loss in today's hybrids). The result, so far, is a claimed five-percent improvement in fuel economy in test vehicles, with the potential of ten percent by the time the new SiC power semiconductor comes to market. Additionally, the carbide wafers allow for smaller a power module, coil and capacitor, thus allowing the entire PCU to be 80 percent smaller (see the side-by-side comparison in the accompanying photo, which you can click to enlarge). We've got a while to wait before we start to see the carbide technology to start making a real-world impact. Toyota aims to begin using the SiC units in 2020. By then, with improvements in the company's other key efficiency factors - engine technology and aerodynamics - cars like the Prius will likely see significant gains in fuel economy. Read more in the press release below. Toyota Develops 'Diamond-like' Computer Chips to Boost Hybrid Mileage May 20, 2014 Toyota City, Japan – Toyota is using one of the hardest materials in nature after diamonds to develop a semiconductor chip it hopes will improve the fuel efficiency of its hybrids, such as the Prius, by as much at 10 percent. The company and its partners announced today that they have developed a silicon carbide (SiC) power semiconductor for use in automotive power control units. Toyota plans to begin test-driving vehicles with the technology on public roads in Japan within a year. The chips, made from carbide - one of the hardest materials in nature, theoretically have superior characteristics such as one-tenth the electrical power loss and 10 times the drive frequency. Toyota said the chips would also allow it to reduce the size of current automotive power control units by 80 percent.

A new Toyota MR2? We want to believe

In the wake of a busy Geneva auto show, the rumor mill is churning, and the latest grist involves one of the most beloved Toyota sports cars of all time. EVO reports that Tetsuya Tada, the chief of the Scion FR-S/Toyota 86 project and a hard-liner about sportscar priorities (light and nimble, but with modest horsepower), wants a third vehicle for Toyota's nascent sporty lineup. Currently, we know there's a Supra-like vehicle in the works, being co-developed with BMW, and the 86 is sticking around. Tada said he'd like a third sportscar to compliment the two we know about, and that he wants it soon. A quick bit of history: Toyota's classic sporty lineup had three components. The most visible was the Supra, whose power and prestige grew as the car evolved from a cushy personal tourer to a high-horsepower, high-technology icon. The Celica was its Clark Kent, more mild mannered but also more accessible and affordable. The third was the MR2, a mid-engined go-kart that lasted for three distinct generations. Each had its charms, and all have their fans. When Tada says that he wants three sportscars in the lineup, we already know about the Supra successor, and the 86 is already filling the Celica's role, so the blank is easy to fill. It doesn't sound like Tada spoke the word "MR2" to EVO, or hinted that the car would be mid-engined, but Tada doesn't seem to say anything without purpose. Whatever the layout, this third car – if it comes to fruition – will probably play a role similar to the MR2 in relation to its stablemates. To translate: it'll likely be even lighter and more nimble, and probably less powerful, than the 86. The closest real-world analogue to the pure MR2 ideal is the Honda S660, a mid-engined Kei roadster that's on sale in Japan right now. It's light, small, and powered by a 0.66-liter inline-three. Toyota could decide to directly compete with the S660, borrow an engine from its small-car specialist subsidiary Daihatsu, and produce a mid-engined MR2. Another possibility, even simpler from Toyota's perspective, would be to adapt the existing Daihatsu Copen roadster. Sure, it's front-engine and front-wheel drive, but it's a small, light roadster. And even better, it sells abroad with a larger 1.3-liter engine. Restyle it slightly, perhaps to resemble the S-FR concept of a couple years ago, and it's an off-the-shelf solution. The S-FR itself is a third possibility.

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.