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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.

Construction of Lexus' first US assembly line underway

The ES is Lexus' top-selling sedan, but the Japanese luxury marque has never manufactured it outside of Japan. In fact, Lexus has never made any cars in the United States, one of its largest markets worldwide. But that's about to change.
Yesterday, construction began in Georgetown, Kentucky, on the first Lexus assembly line in America, the first concrete (or steel) step in a $360-million expansion of Toyota's plant in the Bluegrass state that will create 750 new jobs. The expansion was announced last April by chief executive Akio Toyoda at the New York Auto Show.
Once the new assembly line gets online in the fall of next year, Toyota plans on building some 50,000 units of the ES each year. Lexus sold a record 72,581 examples of the ES in the United States last year - 30 percent more than the previous year - so Lexus will either have to import some more from overseas or leave some buyers disappointed.

Toyota launches new Pixis Epoch kei car in Japan

Kei cars may be small in size, but they're big business in Japan. The latest arrival to the category is the little hatch you see above, the Toyota Pixis Epoch.
It's the fourth vehicle produced by the Daihatsu division but sold under the Toyota brand. As with other keis, power comes from a 660cc engine. It's mated to a continuously variable transmission driving either just the front wheels or all four. In both configurations, the Pixis Epoch features a stop-start system that helps its emissions and fuel efficiency figures come in well below even the Japanese government's stringent standards.
The whole package measures just 3,395 mm (133 inches) long, 1,475 mm (58 inches) wide and 1,500 mm (59 inches) tall, but offers a relatively spacious and utile interior, plus a tight turning radius of just 4.4 meters. Pricing ranges from 795,000 to 1.2 million yen - that's less than $10,000 (and no more than $15k). Further details in the press release after the jump.