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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 recalling 800k Camry, Avalon and Venza models for AC issue

Toyota has announced plans to voluntarily recall 803,000 vehicles from model years 2012 and 2013, over concerns with the air conditioning condenser housing. The recall covers the Camry, Camry Hybrid, Avalon, Avalon Hybrid and Venza, although the exact split between affected models wasn't available.
According to Toyota, the condenser can leak onto an airbag control module, which in turn could cause a short circuit. In most cases, this will just lead to an airbag warning light, but in rarer instances, the airbags could fail to deploy or pop out of their own accord. There's also a concern over a loss of power steering if the airbag control module develops a short.
It's unclear if there have been any injuries or crashes relating to the defects. Toyota will begin informing owners of affected vehicles via first class mail, and will ask them to report to dealerships for recall work, involving the installation of a cover on the condenser housing.

U.S. and Toyota Reach Settlement Over Safety Problems Disclosure

The U.S. has reached a $1.2 billion settlement with Toyota Motor Corp., concluding a four-year criminal investigation into the Japanese automaker's disclosure of safety problems, according to a person close to the investigation. Attorney General Eric Holder, Transportation Secretary Anthony Foxx and U.S. Attorney for the Southern District of New York, Preet Bharara, were announcing the settlement Wednesday morning, said the official, who spoke on condition of anonymity because the official was not authorized to discuss the settlement on the record before the announcement. TOP 5Most Researched Green Cars On AOL Autos 2013 Honda Fit EV MSRP : $36,625 2014 Chevrolet Spark EV MSRP : $26,685 2012 Mitsubishi i-MiEV MSRP : $29,125 2012 Ford Focus Electric MSRP : $39,200 2012 Toyota Prius Plug-in MSRP : $32,000 In a statement early Wednesday, Toyota said it has "cooperated with the U.S. Attorney's office in this matter for more than four years" and had "made fundamental changes to become a more responsive and customer-focused organization, and we are committed to continued improvements." The criminal investigation focused on whether Toyota was forthright in reporting problems related to unintended acceleration troubles. Starting in 2009, Toyota issued massive recalls, mostly in the U.S., totaling more than 10 million vehicles for various problems including faulty brakes, gas pedals and floor mats. From 2010 through 2012, Toyota Motor Corp. paid fines totaling more than $66 million for delays in reporting unintended acceleration problems. The National Highway Traffic Safety Administration never found defects in electronics or software in Toyota cars, which had been targeted as a possible cause. The settlement continues a string of bad publicity for Toyota, which before the unintended acceleration cases had a bulletproof image of reliability. Since the cases surfaced, the company's brand image has been damaged and it has lost U.S. market share as competition has intensified. Last year, Toyota agreed to pay more than $1 billion to resolve hundreds of lawsuits claiming that owners of its cars suffered economic losses because of the recalls. But that settlement did not include wrongful death and injury lawsuits that have been consolidated in California state and federal courts. In December, Toyota filed court papers after a four-year legal battle saying that it's in settlement talks on nearly 400 U.S. lawsuits, but other cases aren't included in the talks.