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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.

BMW Z5 roadster gets frosty in winter testing

The successor to the BMW Z4 (remember that thing?) is currently undergoing testing in what may be the least hospitable place for a two-seat roadster – northern Sweden. Yep, even sunshine-loving convertibles need to undergo winter testing. We still aren't 100-percent certain of the name, but rumors are pointing to BMW ditching the Z4 nomenclature in favor of Z5. As we've reported before, it's very likely that this car is being developed with help from Toyota. The platform underpinning the car shown here could become the long-awaited new Supra (albeit in hardtop-only form). We'd love to tell you about the look of this new car, but between the camouflage and the caked-on snow, it's hard to draw a bead. We can clearly see the headlights are inspired by newer BMWs like the 7 Series and 2 Series, but other details are harder to discern. The right elements are here, though. The prototype has a long hood and short rear deck. It's also worth pointing out that the car shown here marks a return to a canvas convertible roof. Aside from being less complex, our spies report that the soft top is being used to lower weight and provide sharper handling. While our report on the Z4's successor from March 2015 pointed to a 2020 launch date for the new roadster, our spies say the German part of this BMW/Toyota partnership could launch in late 2017 or early 2018 with four- and six-cylinder engine options. Related Video: Featured Gallery BMW Z5: Spy Shots Image Credit: CarPix Spy Photos BMW Toyota Convertible Performance bmw z5

Tesla expects another higher-volume deal with Toyota in next few years

Four months have passed since Toyota ended its relationship with Tesla Motors, in which the electric-vehicle specialist supplied full lithium-ion battery packs to the Japanese behemoth for its RAV4 EV rollout, of which 2,500 vehicles will be completed. Now, Tesla founder and CEO Elon Musk has been heard suggesting that a future collaboration is likely within the next two to three years, and that it will probably be much larger than the last one.
Both Tesla and Toyota have sung each other's praises in the not-too-distant past, Toyota telling Autoblog back in May, "We have a good relationship with Tesla and will evaluate the feasibility of working together on future projects." According to Automotive News, Musk said of the Japanese giant, "We love working with Toyota... We have a huge amount of respect for them as a company and certainly much to learn."
Interestingly, though, the two automakers have rather divergent strategies for eco-friendly automobiles. Toyota, as you're surely aware, is the clear-cut leader in hybrids and has thrown its massive support in the direction of hydrogen fuel cells, while Tesla has invested heavily in battery-electric technology and high-speed charging stations.