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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.

Bibendum 2014: Former EU President says Toyota could lose 100,000 euros per hydrogen FCV sedan

Pat Cox does not work for Toyota and we don't think he has any secret inside information. Still, he's the former President of the European Parliament and the current high level coordinator for TransEuropean Network, so when he says Toyota is likely going to lose between 50,000 and 100,000 euros ($66,000 and $133,000) on each of the hydrogen-powered FCV sedans it will sell next year, it's worth noting. That was just one highlight of Cox's presentation at the 2014 Michelin Challenge Bibendum in Chengdu, China today, which addressed the main problem of using more H2 in transportation: cost. The EU has a tremendous incentive to find an alternative to fossil fuels, since Europe today is 94 percent dependent on oil for its transportation sector and 84 percent of that 94 percent dependency is imported oil. The tab for that costs the EU a billion euros a day, Cox said, on top of the environmental costs. To encourage a shift away from petroleum, European Directive 2014/94 requires each member state to develop national policy frameworks for the market development of alternative fuels and their infrastructure. For the member states that choose to fulfill 2014/94 by developing a hydrogen market – and to be clear, Cox said, it's not an EU diktat that they do so, since a number of other alternatives are also allowed – the aim is to have things in place by the end of 2025. The plans don't even have to be submitted until the end of 2016. The long lead time is due to a quirk in a hydrogen economy. In hydrogen infrastructure, "the first-mover cost is not the first-mover advantage, but the firstmover disadvantage." – Pat Cox In deploying a hydrogen infrastructure, Cox said, "the first-mover cost is not the first-mover advantage, but the first-mover disadvantage, and high risk." That's why the EU and member states will financially support the early stages, but everyone agrees that "if this is to work, it will have to be ultimately and essentially a commercially viable and commercially driven infrastructure roll-out." Since 1986, European Union research programs have spent 550 million euros on hydrogen-related and fuel-cell-related research, including methods of hydrogen storage and distribution as well as improved fuel cells vehicles, Cox said. Expensive problems remain to be solved. At a conference in Berlin, Germany this past summer, Cox said, the unit cost of the refueling stations was identified as the main problem.

Toyota GT86 convertible could debut in March

The dates are lining up, now we wait to see how the badges align. Just before the Toyota GT 86/Scion FR-S/Subaru BRZ line-up was introduced at the Tokyo Motor Show last year, there was a report that Subaru was considering a convertible while Toyota wouldn't even comment on it. That got swapped around when earlier this year the chief engineer on Toyota's side said a convertible was coming, and then a Scion FR-S droptop was confirmed for early 2014.
Autocar now reports that the Toyota GT 86 convertible will make its first appearance at the 2013 Geneva Motor Show in March. In a car whose specs like weight, packaging, horsepower and center of gravity were all tightly controlled to get the most from the least, the changes necessitated by chopping the roof could make this a very different car. It's said to employ a fabric roof to keep a "small" weight gain check, and the suspension will be softened to work more harmoniously with the decreased body stiffness. And somewhere in all that the back seat and trunk space will need to take a hit.
In other news, Autocar says the hi-po GT 86 with some kind of capacitor system instead of batteries is being worked on for 2015.