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Toyota recalling 1.9M Prius models globally for software update

Toyota has announced a set of voluntary recalls covering 960,000 Prius, RAV4, Tacoma and Lexus RX350 models in the United States to address two separate issues. Worldwide, Toyota will have to recall a total of 1.9 million Prius cars.
The Prius recall affects about 700,000 2010-2014 models in the US, due to a fault in the motor/generator control ECU and hybrid control ECU software. It says that the current software could result in high temperatures on certain transistors and possibly damage them. When it fails, the error forces the car into failsafe mode. Toyota says that in rare circumstances, it could even shut the hybrid system down while the car is being driven.
Toyota spokeswoman Shino Yamada told Automotive News that the software update should take about 40 minutes, and dealers would start to be notified about affected vehicles today. She also told them that the first reported glitch occurred in May 2011 in the US when the system overheated and the car entered failsafe mode. The affected cars were built between March 2009 and Feb. 5, 2014, according to Automotive News. Toyota says that it has received no reports of accidents or injuries caused by either fault.

Hydrogen stations that don't work putting a dent in H2 lifestyle

Hydrogen is the most plentiful element in the universe, but it's not abundant enough for some hydrogen fuel-cell vehicle drivers. Southern California lessees of models such as the Hyundai Tucson Fuel Cell SUV are taking to Facebook to voice their complaints about out-of-order fuel cell stations, Green Car Reports says. In many cases, the lack of hydrogen supply has made the cars effectively undriveable. For Tucson Fuel Cell owners, the hydrogen is supposed to be free and unlimited, but Hyundai doesn't manage the stations. One Orange County lessee of a Tucson fuel-cell vehicle hasn't driven the car for over a month because the trio of nearby stations are out of commission. Additionally, some of the stations that do work can only provide about a half-tank worth of hydrogen, once again putting a crimp the driving range of the hydrogen car. California is home to 10 of the dozen public hydrogen refueling stations in the country (there's one each in Connecticut and South Carolina), according to US Department of Energy figures. These sorts of challenges can't help Hyundai's hydrogen efforts. Last month, it was reported that Hyundai has sold fewer than 300 fuel cell vehicles worldwide during the past three years, including about 70 through the first five months of this year. The South Korea-based automaker has said it wants to sell 1,000 fuel-cell vehicles globally by the end of 2015. Fuel-cell drivers and advocates alike are hoping that Toyota will change the game when its Mirai hydrogen vehicles start hitting California roads later this year. Toyota confirmed in May that Mirai US sales would start in October in eight California dealerships. The Northeast is on tap for 2016. Related Video:

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.