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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, PSA extend partnership with new European van

Toyota and PSA Peugeot Citroen collaborate on a number of vehicles. One of them is a small van jointly developed by the two automakers but marketed individually under their own brands across Europe. Now they've announced the extension of that collaboration, and revealed the first image and details of their new product. Set to be unveiled at their respective booths at the Geneva Motor Show this coming March are the new Toyota ProAce, Peugeot Traveller, and Citroen Spacetourer. They replace the Toyota model of the same name as well as the outgoing Peugeot Expert and Citroen Dispatch, and will each be made available in private and commercial shuttle forms. Although technical specifications have yet to be announced, each will share the same underpinnings and mechanical components, leaving only the parts you can see changing from one brand's version to the next. Expect engines to range from 1.5 to 2.0 liters and burning gasoline or diesel, but the latter will undoubtedly prove the more popular option in Europe. No mention was made of a replacement for the Fiat Scudo, another badge-engineered version of the same van program in its current form. That would seem to suggest that Fiat Professional is either preparing to go it alone with the next-generation Scudo, or phase out the model altogether. The current Scudo slots in between the smaller Doblo (imported to the US as the Ram ProMaster City) and the larger Ducato which was also jointly developed with PSA and sold as the Citroen Jumper/Relay, Peugeot Boxer, and here in America as the Ram ProMaster. The ProAce and its cousins are made by PSA at its Sevel plant in Valenciennes, France. Aside from their vans, the Japanese and French automakers also collaborate on the city car platform sold alternately as the Toyota Aygo, Peugeot 108, and Citroen C1. Fiat also partners with PSA on the smaller Fiat Fiorino/Qubo, Peugeot Bipper and Citroen Nemo. All of which just goes to show what a tangled web they weave in the European market, especially where commercial vehicles are concerned. NEW STAGE IN THE CO-OPERATION PROGRAM BETWEEN PSA PEUGEOT CITROEN AND TOYOTA PSA Peugeot Citroen and Toyota Motor Europe (TME) reveal today the new Citroen SPACETOURER, Peugeot TRAVELLER, and Toyota PROACE. They will be available in MPV versions for private use and in shuttle versions for business use. Both companies therefore confirm the continuation of their co-operation agreement signed in 2012.

Toyota asking NHTSA for fuel cell car safety exemption regarding electric shocks

Toyota is requesting an exemption from federal safety regulations that govern electric cars as it prepares to launch a small-scale hydrogen fuel-cell vehicle fleet.
The Japanese automaker is targeting Federal Motor Vehicle Safety Standard 305, which covers the packaging of high-voltage parts in electric cars. According to Uncle Sam, these systems need to be isolated so that passengers and first responders aren't electrocuted in the event of a crash. That seems pretty smart, but it's become a problem for Toyota's upcoming production fuel cell vehicle, as the mechanism that prevents electric shocks in low-speed crashes will apparently simply keep Toyota's car from even functioning.
Instead of the federally approved system, Bloomberg reports that Toyota plans to insulate the high-voltage wires and cables in the car, along with shielding electrical components like the fuel cells, electric motor and batteries with (presumably non-conductive) metal barriers.