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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.

Toyota still wants Tesla's battery help, still evaluating RAV4 EV program

Tesla Motors said earlier this month that the agreement it has with Toyota to supply battery packs for the Toyota RAV4 EV SUV would be finished by the end of the year. The deal is done, but Toyota is now singing its best version of Baby, Please Don't Go. The Japanese automaker may look to extend the battery-pack agreement with California-based Tesla, Automotive News says, citing comments made by Osamu Nagata, who heads Toyota's manufacturing and engineering in North America. Nagata also complimented Tesla for its "clear business strategy." Toyota, which owns 2.5 percent of Tesla, started the RAV4 EV collaboration in 2012, in which Tesla was to make about 2,600 battery packs for the all-electric SUV. That agreement was estimated to be worth about $100 million. "We are also evaluating the RAV4 EV program and will have more to say at a later date" – Toyota "We have a good relationship with Tesla and will evaluate the feasibility of working together on future projects," Toyota said in a statement e-mailed to AutoblogGreen. "We are also evaluating the RAV4 EV program and will have more to say at a later date." And while Toyota hasn't quite met initial sales expectations – it sold about 1,600 of the RAV4 EVs through this spring – the company expects to reach 2,500 by the end of the year. And the partnership did generate about $15 million in revenue for Tesla, according to that company's first-quarter letter to shareholders. That said, Tesla is obviously focusing its battery-making efforts on its own models.

Recharge Wrap-up: Model X pinch sensor update, Karma plans first store

Tesla has improved Model X pinch sensor function in its latest over-the-air update. As we've seen, the pinch sensors already stop the falcon wing doors from completely shutting when they sense an obstruction. Now, though, the doors retract slightly after the sensors are triggered. While the pre-update doors didn't appear to do as much damage to human fingers as they do to various foodstuffs, it definitely looked uncomfortable, especially when one's hand is stuck in the partially closed door. Now, any pinch that does occur should be brief. See the updated sensors at work in the video above, and read more from Teslarati. Karma Automotive will move to Kawasaki's former headquarters in Irvine, California where it will also open its first store. The revival of the now defunct Fisker will sell its Revero plug-in hybrid through both dealerships and company-owned stores like the one planned for its new two-building campus. The property owner, Bixby, had planned to renovate the site, but now says Karma will make its own improvements. Bixby said it was seeking, "a progressive-minded tenant that would value the unique configuration," and appears to have found just that in Karma. Read more at Electrek, or from the OC Register. San Francisco is asking residents for help in expanding its subways. Using an online tool called Subway Vision, users can draw their own subway lines and stations that they'd like to see built and submit them to planners. Listening to the public is a useful tool for the city because, as Grahm Satterwhite, San Francisco Municipal Transportation Agency's principal planner, admits, "Transportation planners may be too close to a problem to see the solution." This approach allows the subway expansions to "reflect the vision of not just a few transportation planners, but of all San Franciscans," he says. Read more from FastCo.Exist. Toyota is continuing its commitment to Yellowstone National Park with a sustainable Youth Campus for environmental education. The automaker donated $1 million to Yellowstone for the facility, which is seeking Living Building Challenge certification. It will have onsite wastewater treatment for its locally sourced water usage, and will generate all of its electricity needs from photovoltaic panels, with excess to put back into the grid. The campus will have classrooms and residences for students and staff for its youth programs.