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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.

Minivan Comparison | Sienna vs Odyssey vs Pacifica vs Sedona

The minivan segment is fresher than it's been in years, possibly decades. The 2021 Toyota Sienna is a completely redesigned model with a bold new look and standard hybrid powertrain. Both the Honda Odyssey and Chrysler Pacifica were refreshed for 2021 with updated styling, upgraded tech, and in the case of the Pacifica, newly optional all-wheel drive. Only the 2021 Kia Sedona soldiers on without changes; it's still a solid van despite its advanced age and relatively few people buying it.  Usually when we put a comparison like this together, we have to pick and choose which vehicles to include (mostly because we can't do some 15-car spreadsheet without utilizing 4-point font). In the case of minivans, there are only four. That certainly makes it easier to research and cross-shop in person without worrying that you might be missing out on something. It also makes it a bit easier to go beyond the usual spreadsheet and dig a little deeper than normal into the competitors. Let's take a brief look at each. 2021 Toyota Sienna The Sienna is completely new for '21 after going a decade with only updates. Its exterior style is more expressive than before, but it's the new cabin that really impresses — it's far more car-like in appearance, but still offers the expected amount of abundant storage and functionality. Mechanically, the big news is that every Sienna is now a hybrid. Though down a bit on power compared to everything else, its 36 mpg combined (or 35 mpg with all-wheel drive) crushes everything but the Pacifica plug-in hybrid. This exceptional fuel economy and its far-sliding, big-kid-friendly second-row seats are its main selling points, but in every other respect, it's fully competitive.  Read our full 2021 Sienna Review 2021 Toyota Sienna View 41 Photos 2021 Chrysler Pacifica The Pacifica gets its first comprehensive set of upgrades since it was all-new for '17. The front end has been restyled, all-wheel drive is now an option and there's a new Pinnacle range-topping trim. The big news, however, is its technology offerings. Every Pacifica now comes standard, as the Odyssey and Sienna do, with a comprehensive array of driver assistance technologies. Every trim also gets Chrysler's latest UConnect infotainment system with a larger, 10.1-inch touchscreen and wireless Apple CarPlay and Android Auto.

Carmakers ask Trump to revisit fuel efficiency rules

Car companies operating in the US are required to meet stringent fuel efficiency standards (a fleet average of 54.5MPG) through 2025, but they're hoping to loosen things now that President Trump is in town. Leaders from Fiat Chrysler, Ford, GM, Honda, Hyundai, Nissan, Toyota and VW have sent a letter to Trump asking him to rethink the Obama administration's choice to lock in efficiency guidelines for the next several years. The car makers want to revisit the midterm review for the 2025 commitment in hopes of loosening the demands. They claim that the tougher requirements raise costs, don't match public buying habits and will supposedly put "as many a million" jobs up in the air. The Trump administration hasn't specifically responded to the letter, although Environmental Protection Agency nominee Scott Pruitt had said he would return to the Obama-era decision. The automakers' argument doesn't entirely hold up. While the EPA did estimate that the US would fall short of efficiency goals due to a shift toward SUVs and trucks, the job claims are questionable. Why would making more fuel efficient vehicles necessarily cost jobs instead of pushing companies to do better? As it is, even a successful attempt to loosen guidelines may only have a limited effect. All of the brands mentioned here are pushing for greater mainstream adoption of electric vehicles within the next few years -- they may meet the Obama administration's expectations just by shifting more drivers away from gas power. This article by Jon Fingas originally appeared on Engadget, your guide to this connected life. Related Video: News Source: ReutersImage Credit: Daniel Acker/Bloomberg via Getty Images Government/Legal Green Chrysler Fiat GM Honda Hyundai Nissan Toyota Volkswagen Fuel Efficiency CAFE standards Trump