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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 says no one wants a Toyota electric car

It's no secret that Toyota doesn't really have a heart in pushing pure electric vehicles. The very limited Scion iQ EV project was killed before it went very far and the RAV4 EV project with Tesla was always only meant to produce just 2,600 units, but it didn't even get that far. In short, by all public appearances, Toyota just doesn't see the value of a pure EV. "No one is coming to our door asking us to build a new electric car." – Toyota's Craig Scott Toyota's public reasoning for the lack of a Prius C EV, for example, has often been that customers don't want to compromise on range and that hydrogen is a better bet. Company executives like Bob Carter say so over and over again. A new comment by Craig Scott, Toyota's national manager of advanced technologies, says that the Japanese automaker, give a slightly different spin on things. "Toyota actually favors fuel cells over other zero-emission vehicles, like pure battery electric vehicles," he told the Los Angeles Times. "We would like to be still selling cars when there's no more gas. And no one is coming to our door asking us to build a new electric car." This, understandably, has riled up a lot of EV supporters, many of whom have called on all automakers to sell more electric vehicles. After all, if Nissan can sell around 3,000 EVs a month in the US, couldn't Toyota do something similar? Are there thousands of people coming to the door asking for the fuel cell sedan that Toyota will start selling in the US next year? That answer is unclear, but it certainly doesn't look like Toyota is backing off its H2 bet any time soon.

Toyota and Lexus recall models for inadvertent airbag deployment

The Basics: Toyota will recall 320,000 examples in the US of the 2003-2006 Land Cruiser, 2004-2006 4Runner, 2005-2006 Tundra and Sequoia, 2003-2006 Lexus LX470, and 2004-2006 GX470. The Problem: The curtain shield airbags that come down from the roof can inadvertently deploy shortly after vehicle startup. This is due to improper programming of the airbag control module. Injuries/Deaths: "Toyota is not aware of any crashes caused by the condition. We have received reports alleging injuries such as abrasions and ringing in ears," company spokesperson Cindy Knight told Autoblog. The Fix: Toyota and Lexus dealers will replace the airbag control module with a new part, which will have improved programming. If You Own One: Toyota and Lexus will notify affected owners by mail early this month. Related Video: Toyota and Lexus Recall Certain Land Cruiser, 4Runner, Tundra, Sequoia, LX, and GX Vehicles February 02, 2016 TORRANCE, Calif., February 2, 2016 – Toyota Motor Sales, U.S.A., Inc. today announced that it is conducting a safety recall of approximately 320,000 Model Year 2003-2006 Land Cruiser; 2004-2006 4Runner; 2005-2006 Tundra and Sequoia; 2003-2006 LX 470; and 2004-2006 GX 470 vehicles. The involved vehicles are equipped with side Curtain-Shield-Airbags (CSAs) which deploy from the roof in the event of certain types of crashes. Due to improper programming in the airbag control modules, there is a possibility that, under certain specific and limited conditions shortly after startup, the CSAs and seat belt pretensioners could activate when not necessary. Unexpected activation of the CSAs could increase the risk of injury to the occupant. All known owners of the involved vehicles will be notified by first class mail. Toyota and Lexus dealers will replace the airbag control module with one which has an improved programming at no cost to owners. Information about automotive recalls, including but not limited to the list of involved vehicles, is subject to change over time. For the most up-to-date Safety Recall information on Lexus, Toyota and Scion customers should check their vehicle's status by visiting http://www.toyota.com/recall and entering the Vehicle Identification Number (VIN). Safety Recall inquiry by individual VIN is also available at the NHTSA site: safercar.gov/vin. For any additional questions, customer support is also available by calling Toyota Customer Service at 1-800-331-4331 or Lexus Customer Service at 1-800-255-3987.