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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 Sienna vs Chrysler Pacifica Hybrid | Minivan comparison test

Shopping for a new car can be difficult due to the sheer number of choices. Which brand do you start with, which do you skip and are you missing something worthwhile? Thankfully, minivans are much simpler. There are effectively only four choices, they're all pretty good and they're even different enough to make choosing the right one for you a bit easier. This comparison features the two most recently updated minivans: the Toyota Sienna versus the Chrysler Pacifica Hybrid. Besides their common newness, they stand out in another fundamental way: they're both hybrids. Now, they're very different hybrids – the Toyota comes standard with a traditional gasoline-electric system like that of a Prius, whereas the Pacifica is offered with an optional plug-in hybrid system that provides an estimated 32 miles of all-electric range before effectively turning into a traditional hybrid – but in both cases, fuel economy is the priority. With the rare exception, the minivan segment has exclusively used V6 engines, which provide sufficient power to move hefty loads of people and stuff. The Chrysler Pacifica comes standard with a V6, while a V6 is the sole powertrain option for the Honda Odyssey and new 2022 Kia Carnival. The fuel economy difference between those and our hybrid competitors is staggering: The new Sienna gets an EPA-estimated 36 mpg combined while the Odyssey and V6 Pacifica get 22 mpg. That equates to saving an estimated $750 every year on gas, according to the EPA. And the Pacifica Hybrid could potentially save you even more as long as you routinely utilize its electric range. This frugality alone could send the Sienna and Pacifica Hybrid to the top of many shopping lists, but as we've seen in previous tests, they offer more than enough in other respects to warrant top consideration. But which is better, Sienna or Pacifica? Well, we knew this was going to be close, and we were right. After averaging the scores from 16 categories, the difference between first and second was a mere 0.06 out of 10. When we added extra weight to key minivan-buying attributes (second-row space/versatility, safety features and functionality, infotainment, interior storage, cargo space/versatility, value and fuel economy), the gap was only 1 point out of a possible 230. We then triple checked and conducted a recount, but the order remained. In the end, there are no losers here.

400-hp Toyota Hybrid-R Concept gets second teaser

Toyota has released a second teaser of its Hybrid-R Concept, along with an estimation of the show car's power output. Using technology that's "similar to that used by Toyota Racing's TS030 Hybrid race car," the concept is expected to deliver over 400 horsepower.
The press release also mentions that the new concept is based on a current production model. While it's difficult to tell from the sole teaser image of the car's body, rumors are flying that it's related to the Yaris. If that's the case, though, it's difficult to know what to make of this concept. The teaser image is quite dark, but we played around with the exposure and came up with an image that reveals more details about the new concept. Take a look at the related gallery, below, to see the high-exposure image. We'll find out for certain what the Hybrid-R is in a few weeks at the Frankfurt Motor Show. Let us know what you think Toyota's newest concept is in the comments.