1985 Toyota Mr2--motor Trend Car Of The Year on 2040-cars

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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.

Japanese earthquakes send ripples through auto industry

The earthquakes since April 14 in Japan's Kumamoto Prefecture on the island of Kyushu are having aftershocks on the US auto industry, particularly for Toyota. The company shut down most of its factories in the country due to parts shortages, and the plants will be closed at least through April 23. "Decisions regarding recommencement of operation at plants in Japan will be made on the basis of availability of parts," the company said in a statement. According to Automotive News, Toyota's closed factories include a vast range of popular models in the US, including the Toyota Prius, Mirai, RAV4, 4Runner, Land Cruiser, Lexus ES, LS, IS, GS, RC, NX, RX, GX, and LX. The company's only sites in Japan that are still open build Hino trucks, Daihatsu models, and the Toyota Century limo. Toyota isn't yet sure whether these shutdowns could lead to vehicle shortages in the US. "As you can imagine, we are still reviewing the situation and working to learn more," company spokesperson Aaron Fowles told Autoblog. "While we know that production will be suspended in stages at most of our vehicle assembly facilities in Japan between April 18th and the 23rd, we do not know if they will continue production suspensions. Also, any effects to our inventory and/or sales have yet to be determined." He expects the automaker to know more in the coming days. Many of the affected Toyota plants aren't even in Kumamoto Prefecture, but major suppliers have factories in the region. For example, Aisin Seiki and Renesas Electronics both had to shutdown operations at plants in the area, according to Automotive News. Toyota isn't the only automaker affected. Nissan experienced a brief slowdown but was back to work on Monday, and Honda has suspended a motorcycle plant in the region until Friday. Mitsubishi had to close a production line due to the parts shortage, according to The Japan Times, but it didn't affect US models. "A supplier to our Mizushima plant has been impacted but they only supply an engine part for our mini car line. That line has been temporarily shut down due to that situation," spokesperson Alex Fedorak told Autoblog. "That same plant builds the Lancer and i-MiEv and there has been no impact to that line and production continues uninterrupted." Two major quakes hit Kumamoto Prefecture around Kumamoto city in the past week. The first on April 14 measured 6.4 magnitude, and a second on April 16 measured 7.3.

2015 Toyota Sienna

It's hard to love a minivan, but it's very, very easy to use one. More than any other kind of vehicle - save a panel van, perhaps - the minivan is the most appliance-like of four-wheeled transportation devices. And most minivan buyers don't need to love their purchases; they just need to use them. So when it comes to a minivan's driving dynamics, who cares?
Well, we do. So we perked right up when Toyota talked about refinements it made to the 2015 Sienna, starting with some 142 added spot welds made to the body structure. Normally not stop-the-presses stuff, but Toyota says the added reinforcements prompted Sienna engineers to recalibrate the springs and shocks for improved handling, and our very limited wheel time along the (admittedly benign) roads on the Big Island of Hawaii revealed the 2015 Sienna SE model's handling to be tidier and more engaging than you'd expect for a porky, 4,560-pound, eight-passenger box on wheels.
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