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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.

Ex-Toyota Bill Reinert still in favor of hybrids, against EVs

Former Toyota executive Bill Reinert is so unsold on electric vehicles as a viable advanced-powertrain option for future transportation that he has praised – gasp – Ford, for its downsized internal combustion engines. Reinert was a key player in developing Toyota's original Prius hybrid and, in an interview published in Yale University's Environment 360 blog, said a hybrid that gets 60 miles per gallon is superior to an electric vehicle. "And that is why you will be seeing more fuel cells in the future." – Bill Reinert Reinert went on to praise the advances that automakers have made in improving fuel economy of fossil fuel vehicles, specifically namechecking Ford and its three-cylinder Ecoboost engine. He also has good things to say about both hydrogen fuel-cell electric technology as well as natural gas vehicles, but admits that limited fueling infrastructure will keep those types of vehicles in the margins for the near future. He also says that hydrogen vehicles aren't that great yet but that, "When most [manufacturers] investigate the two technologies [H2 and EVs], they see that FVCs offer more room for performance improvement and cost reduction potential. And that is why you will be seeing more fuel cells in the future." As far as pure electric, Reinert says lithium-ion batteries have "tremendous shortcomings" and talks about battery degradation, substandard performance in hot weather and, of course, limited single-charge driving range. He also says that people need to factor in the environmental impact of producing electricity for the grid to fully gauge how environmentally beneficial EVs can be. We'd like to take him and Tesla Motors Chief Elon Musk to what we think would be a spirited lunch. You can read the whole interview with Reinert here.

2014 Toyota Corolla debuts with more power, interior space

Depending on who you ask, the best-selling car in the world is either the Ford Focus or Toyota Corolla. Not surprisingly, Toyota claims it's the Corolla. Either way, we're talking around a million individual units per year, and over 40 million over the car's lifetime on the market, so the redesign of Toyota's compact sedan is big-time news for the Japanese automaker that it needs to get right.
The Toyota Corolla was last redesigned way back in 2008, meaning the 2014 model is a long-overdue update to the C-segment sedan. Its age shows when compared to newer rivals like the Honda Civic, Chevy Cruze, Hyundai Elantra and the aforementioned Ford Focus when comparing technology features, fuel mileage and interior roominess. In an effort to solve those demerits, Toyota has added nearly four inches to the 2014 Corolla's wheelbase and will offer a new continuously variable transmission with seven simulated gear ratios.
Engine choices consist of two available 1.8-liter four-cylinder units, one with 132 horsepower and 128 pound-feet of torque, and another more efficient version that uses Toyota's new Valvematic technology to offer 140 horses and 126 lb-ft of torque. Eco and Sport modes will be selectable by the driver.