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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's Lentz says fuel cells are the future, not EVs

Toyota is not bullish on EVs. That comes from the company's North American CEO, Jim Lentz, who said the company will focus not on electrification, but on continued hybridization with a long-term focus on hydrogen fuel cells.
Lentz questioned the long-range ability of EVs, saying that Toyota feels "there are better alternatives, such as hybrids and plug-in hybrids, and tomorrow with fuel cells." Lentz spoke about Toyota's focus on hydrogen following Forbes Brainstorm Green conference and barely a week after a battery deal between Tesla and Toyota ended, according to Automotive News.
That deal provided for 2,500 battery packs for the Rav4 EV. While valuable to Toyota, the deal "was never about open-ended volume," Lentz said. "It was time to either continue or stop. My personal feeling was that I would rather invest my dollars in fuel cell development than in another 2,500 EVs."

Cosworth teases upgrades for Subaru BRZ

Subaru may or may not produce an STI version of the BRZ. Things seem to go back and forth on the subject. But Subaru Tecnica International isn't the only company with a history of tuning Subies. So does Cosworth, and now the British racing firm appears to be turning its attention to the BRZ and its Toyota- and Scion-badged siblings.
For those unacquainted, Cosworth is more than your average tuning company. It's a racing firm first and foremost, having made F1 engines under its own name as well as Ford's (chief among them the all-conquering DFV 3.0-liter V8 of 1960s and 70s fame), not to mention engines for Indy, rally and even high-performance, road-going versions of the Ford Sierra, Chevy Vega and Mercedes 190E. The list goes on and on, but you get the point.
Now withdrawing from Formula One, Cosworth is focusing its attention on tuning road cars again with the launch of the Cosworth Power Package line, the first of which will focus on the Toyota GT86 (aka Scion FR-S) and Subaru BRZ. We don't know just yet what will be included in the packaged dubbed FA-20, but from the video teaser below, it seems there'll be upgrades to the exhaust, suspension, aero and - if we're lucky - maybe a super- or turbocharger for the 2.0-liter flat-four engine. We'll have to wait and see, but we get the feeling that with Cosworth on the job, it'll be worth the wait. Check out the minute-long video below in the meantime.