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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.

Safety Agency Studying Toyota Acceleration Problem

A U.S. safety agency is looking into a consumer's petition alleging that older Toyota Corollas can accelerate unexpectedly at low speeds and cause crashes. The inquiry by the National Highway Traffic Safety Administration covers about 1.69 million of the Corolla compact cars from the 2006 to 2010 model years. The agency will decide whether to open a formal investigation into the problem. An unidentified consumer said in a letter to the agency that he experienced multiple low-speed surges in a 2010 Corolla, and the brakes failed to stop the car in time to prevent a crash. The consumer said the problem caused one collision with a parked vehicle on June 8. "In addition to evidence from our crash incident, we are providing evidence that many other Corolla owners are experiencing similarly unsafe scenarios that are leading to crashes," said a portion of the consumer's letter posted Monday on NHTSA's website. The consumer provided 163 reports from other drivers who experienced a surge at low speed or no speed. But NHTSA said it eliminated duplicates, those outside the scope of the 2006-2010 model years and those from foreign countries to get 141. No injuries were reported. The agency said it would evaluate all of the complaints from the consumer in order to decide whether to grant or deny the petition and open a formal investigation. The consumer filed the petition on Sept. 11, according to the documents. Messages were left Monday morning seeking comment from Toyota. In 2009 and 2010, Toyota issued a series of recalls totaling more than 10 million vehicles for various problems including faulty brakes, sticky gas pedals and ill-fitting floor mats. Toyota is under pressure to announce recalls quickly after a U.S. government investigation found it hid information about past defects. Last month, the company agreed to pay $1.2 billion to settle that investigation. It also paid fines totaling $66 million to the U.S. government for delays in reporting unintended acceleration problems. The company has said it made "fundamental changes to become a more responsive and customer-focused organization, and we are committed to continued improvements." Recalls Toyota Safety NHTSA crash unintended acceleration

Autoblog Minute: VW Q3 financial woes, 2015 Tokyo Motor Show

Consumer Reports pulls its Tesla recommendation, the U.S. Copyright Office offers a ruling affecting car owners, VW gets hit hard with third-quarter losses, and lots of exciting news from Tokyo. Autoblog senior editor Greg Migliore reports on this edition of Autoblog Minute Weekly Recap. Show full video transcript text [00:00:00] Consumer Reports pulls its Tesla recommendation, the U.S. copyright office offers a ruling that affects car owners and gear heads, VW gets hit hard with third-quarter losses, and lots of exciting news from Tokyo. I'm senior editor Greg Migliore and this is your Autoblog Minute Weekly Recap. After a week away testing vehicles for Autoblog's Tech of the Year award, we're back in the office to recap the week in automotive news. [00:00:30] One of the things you might have missed was Consumer Reports pulling its recommendation of Tesla's Model S sedan. The blemish for Tesla comes after a tally of reviews from customer surveys. The most common problem areas for the Model S as cited by survey takers included: the drivetrain, power equipment, charging equipment, body and sunroof squeaks, rattles, and leaks. So lots of stuff. Though they could not ignore a score of "worse-than-average", Consumer Reports still [00:01:00] highlighted the fact that the Model S was "the best performing car" they've ever tested. Telsa CEO Elon Musk took to social media to defend his sedans saying: "Consumer Reports reliability survey includes a lot of early production cars. Already addressed in new cars." And, "Tesla gets top rating of any company in service. Most important, CR says 97% of owners expect their next car to be a Tesla (the acid test)." In Financial news, Volkswagen took a hit and reported an operating loss of [00:01:30] $3.84 billion. This is the first such loss for VW in 15 years. Toyota reclaimed the crown as the world's largest automaker as well. It's important that it's not all doom and gloom for VW though in Q3. Sales revenues were up and the company's automotive division boasts $30 billion dollars in liquid assets. It's a sizable war chest that will no doubt come in handy, as the company has yet to feel the full brunt of the diesel emissions scandal. Good news for gear heads. The US copyright office [00:02:00] ruled in favor of mechanics and car owners by granting an exception to existing copyright law. The law was originally meant to prevent software pirating and bootlegging of Hollywood movies.