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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's HaMo urban mobility carsharing program comes to France

We're guessing no one's nuts enough to try to take one of Toyota's three-wheeled leaning electric i-Road vehicles up into the French Alps. Still, the town of Grenoble, France, which sits at the foot of the mountains, has received 35 of those vehicles as part of a carsharing pilot program. Toyota's thrown in 35 four-wheel Auto Body COMS vehicles into the program as well. Grenoble, which is about 200 miles north of Marseille, was presumably chosen because of existing carsharing programs run by Cite-lib. This program, dubbed "Cite lib by Ha:mo," goes a little more futuristic, though, as it's part of what Toyota calls its "Ha:mo" plan (Ha:mo is short for "harmonious mobility"). The program will run for three years and includes 27 charging stations near bus lines and train stations. The public will be charged anywhere from three to 19 euros ($3.80 to $24.50 US) to use the vehicles for between 15 minutes and four hours. The good news is that drivers can pick up the vehicles in one location and drop them off in another. Toyota started testing the i-Road vehicles in Toyota City, Japan, this past March. The trike is about three feet wide and has a top speed of 28 miles per hour. Check out Toyota's press release below and read AutoblogGreen's "First Drive" impressions of the i-Road here. "Cite lib by Ha:mo", a New Type of Urban Mobility Based on Ultra-Compact Electric Vehicles Connected to Public Transport, Launches in Grenoble, France This innovative car-sharing service aims to prepare the City and agglomeration of Grenoble for electric mobility within a comprehensive multi-modal mobility plan. The three-year trial project brings together the competencies and services of five partners: the City of Grenoble, the Metro Area, French electricity company EDF and its affiliate Sodetrel, Toyota, and Cite lib, the local car-sharing operator. 35 three-wheel Toyota i-ROAD and 35 four-wheel Toyota Auto Body COMS will be available for short city trips in 27 charging stations installed and operated by Sodetrel - including for one-way trips from one station to another. A total of 120 charging points for the project and 41 for other plug-in vehicles will be added to the city's transport infrastructure. A simple pricing plan dubbed "3, 2, 1 euros" for respectively the first, second and third 15-minute increments will be proposed to Grenoble citizens.

US expands probe into ZF-TRW airbag failure-to-deploy to 12.3 million vehicles

DETROIT — U.S. auto safety regulators have expanded an investigation into malfunctioning airbag controls to include 12.3 million vehicles because the bags may not inflate in a crash. The problem could be responsible for as many as eight deaths. Vehicles made by Toyota, Honda, Kia, Hyundai, Mitsubishi and Fiat Chrysler from the 2010 through 2019 model years are included in the probe, which was revealed Tuesday in documents posted by the National Highway Traffic Safety Administration. It involves airbag control units made by ZF-TRW that were installed in the vehicles. The control units can fail in a crash, possibly because of unwanted electrical signals produced by the crash itself that can disable an air bag control circuit housed in the passenger compartment, according to NHTSA documents. The electrical signals can damage the control circuit, the documents say. ZF, a German auto parts maker which acquired TRW Automotive in 2015, said in a statement that it's committed to safety and is cooperating with NHTSA and automakers in the investigation. The case is another in a long list of problems with auto industry airbags, including faulty and potentially deadly Takata airbag inflators. At least 24 people have been killed worldwide and more than 200 injured by the inflators, which can explode with too much force and hurl dangerous shrapnel into the passenger cabin. The inflators touched off the largest series of automotive recalls in U.S. history involving with as many as 70 million inflators to be recalled by the end of next year. About 100 million inflators are to be recalled worldwide. On April 19, NHTSA upgraded the ZF-TRW probe from a preliminary evaluation to an engineering analysis, which is a step closer toward seeking recalls. So far, only Hyundai and Kia and Fiat Chrysler have issued recalls in the case. Four deaths that may have been caused by the problem were reported in Hyundai-Kia vehicles and three in Fiat Chrysler automobiles. NHTSA opened an investigation in March of 2017 involving the TRW parts in Hyundais and Kias. The upgrade came after investigators found two recent serious crashes involving 2018 and 2019 Toyota Corollas in which the airbags did not inflate. One person was killed. Jason Levine, executive director of the Center for Auto Safety, a nonprofit consumer group, said the ZF-TRW case shows the auto industry thus far has learned very little from Takata.