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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 Tells Dealers To Stop Selling Six Models

Toyota has told North American dealers to stop selling six popular models with heated seats because the fabric doesn't meet flammability standards. One soft material beneath the seat covers does not comply with U.S. safety standards, company spokesman John Hanson said. No fires or injuries have been reported, but Toyota can't legally sell cars that don't comply with U.S. safety codes, Hanson said. The company is still totaling how many vehicles are affected, but it will be in the thousands, according to the spokesman. The stop-sale order could mean trouble for Toyota and its dealers because it covers the company's top-selling vehicles. Dealers can no longer sell certain Camry, Avalon, Sienna and Tacoma models from the 2013 and 2014 model years, as well as Corollas and Tundras from 2014. The Camry, for instance, is the top-selling car in the U.S. with more than 408,000 sales last year. It depends on how long the repairs will take. Hanson said the company already has a new material that's being installed at factories and will be put in cars that are on dealer lots. "We don't think it will take long to get the parts and make the changes," Hanson said, without getting more specific. As for vehicles already on the road, Hanson says Toyota has reported the problem to the U.S. National Highway Traffic Safety Administration, which will decide if the sold vehicles should be recalled. A NHTSA spokesman said he would check into the matter. "We don't believe that there is a safety issue here because there have been no reports of any problems," Hanson said. The stop-sale order affects cars and trucks distributed to dealers in the U.S., Canada and Mexico. In addition, some vehicles were exported outside North America, Hanson said. The problem was discovered by safety regulators in South Korea, who disassembled seats and tested individual fabrics, Hanson said. U.S. safety standards require fabrics to resist flames at a certain rate, but the one fabric didn't meet the standard, Hanson said. Toyota spokesman Naoki Sumino in Japan said the affected vehicles were sold since August of 2012, when the fabric supplier was changed. Toyota has been struggling to regain its once sterling reputation for quality after announcing massive recalls over several years, starting in 2009, for a variety of defects including braking, accelerators and floor mats. The company was fined for being slow on recalls, which affected more than 14 million vehicles, and faces lawsuits.

Scion pondering move upmarket?

Scion is simultaneously celebrating its ten-year anniversary with the 10 Series models and trying to figure out what to do with itself over the next ten years. Once a go-to consideration for young, first-time buyers who wanted something cool and different, in 2013 it has a model everyone is still talking about in the FR-S, a model few are still talking about in the iQ, and three models in between in the tC, xB and xD that make everyone wonder, "What happened?"
Automotive News spoke to Toyota's North American CEO, Jim Lentz - he was the VP in charge of Scion when it launched - about the options, and Lentz said one of them could be a move upmarket to challenge the established luxury brands that are moving downmarket. "There's going to be a big need in the $25,000 range for a fun-to-drive, nice-looking, value-oriented product," he said, and the FR-S, which starts at $25,255, could provide the platform for Scion to climb up a notch or two in price and perception. An idea like this could conceivably work in tandem with a proposal to move entry-level Scion products over to the Toyota brand - but remember, this is all just ideas on a whiteboard at the moment.
As opposed to an "entry-luxury fighter," the brand could swing back to the other option that was considered when it was formed, directly challenging the Korean makes that have usurped its cachet with first-time buyers. Lentz said Scion could go either way, and the tone of the piece seems to indicate that the final direction is still a ways away from being resolved.