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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.

Fuel cells will flop outside Japan, says VW

"It may fly within Japan, but not globally," VW's Shoji said.
It's long been battered into our beleaguered auto writer brains that the ultimate future source of motivation for tomorrow's cars and trucks is not gasoline, diesel, electricity, natural gas, propane or solar power - it's the hydrogen fuel cell. It's been the Next Big Thing since the start of Next Big Things.

We dialed a random Swede, talked about not driving Volvos

The Swedish Number is now a thing. It's a cool thing. You dial, a random Swede picks up, and you chat. Or, in my case, you dial and a random Brit living in Sweden for the past six year picks up and you chat. Since I was calling on behalf of Autoblog, when I got Martin from the small coastal town of Sundsvall, on the phone, we talked about cars, Volvos (natch), and cold-weather testing. Oh, and about plugging in his regular Toyota Prius. ABG: I was able to come to Sweden and test Volvos a month or so ago. Do you drive a Volvo? Martin: [laughs] No. I think Volvo is a fantastic car. It truly is an amazing car, but no. My girlfriend has a company car, so we drive a hybrid Toyota Prius. ABG: And how does that work in the cold winters? It obviously cuts down on the environmental problems. Martin: No problem at all. Because we have these cold winters, like you do get in the States as well, where we park our cars, we've got electricity posts where we can plug in the cars. Motor car engines have a heater, so you can have the heater going for some time before you get into the car. So it warms up the engine and there's a socket inside the car to warm up the inside of the car as well. It's very efficient. You just need to remember to set the timer when you climb out of the car and connect the cable. It obviously cuts down on the environmental problems as well because your car is already warm before you start them. ABG: I know that makes them overall more efficient, I just didn't know it could work with any car. It used to be you would keep the diesel engine blocks warm, but this works for pretty much any car in Sweden? Martin: Yes. Our temperatures here can vary. We do tend to get roundabout -18 to -25C [0 to -15F], where I live, sometimes. Normally, in the winter, we always plug the car in to make it more environmentally friendly, for starters, and then it's a nice warm car when you get in. The coldest I remember it getting here was -36 [-33F]. In the north of Sweden they've had, on record, -56 [-69F]. ABG: That's too cold. Martin: That is cold, yeah. Most countries, now, use the north of Sweden to test their cars because of the ice. Volvo S90 Prototype View 15 Photos ABG: That's actually why I came over there, to test out the new XC90s and S90s. Martin: Is that your job, then? ABG: I don't test the cars for the companies, but I test them for Autoblog. They'll invite us to test the vehicles so we can see for ourselves what the vehicles do in cold weather.