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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.

See how Toyota Mirai hydrogen fuel cell car is made [w/videos]

Toyota kicked off production of the Mirai hydrogen fuel cell sedan at its Motomachi factory campus in December, and at the time the company had orders for 200 of them. In just the few months since then, demand has already jumped to requests for at least 1,500 of the potentially revolutionary vehicles. For the first time, the Japanese brand is taking viewers into the innovative model's production process and showing the sedate pace of putting them together. The line used for the Mirai was formerly home to Lexus LFA production. Like that low-volume, cutting-edge supercar, Toyota is prioritizing quality and precision for its fuel cell vehicle. At the moment, it's building just three of the sedans per day with a tight, dedicated team. According to Automotive News, there are just 13 people assembling the cars right now, and at most they could only complete 10 per day. The production process for the Mirai is more akin to a boutique sportscar than the high-volume efficiency Toyota usually shows. There's no belt moving them along, and instead each one is pushed between areas. With so much riding on these models, this approach is meant to guarantee an attention to quality. "These facilities are not so advanced. Rather, we rely on the work of our skilled employees. This is similar to how things were when Toyota was just starting out," said Toyota President Akio Toyoda during a ceremony at the plant, according to Automotive News. Toyota has released a gallery of images and five videos showing the major steps in the Mirai's production process, including the complicated installation of the fuel cell stack. All of the clips are embedded below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Toyota Supra, Rolls-Royces, dozens of BMWs recalled for backup camera issue

Weeks after Nissan and Infiniti recalled more than 1.2 million vehicles for a potentially dangerous programming oversight in the backup camera settings, BMW has issued a recall for similar problems. The recall, which covers 257,481 vehicles, includes numerous BMWs, as well as two Rolls-Royce models, and the 2020 Toyota Supra.  In total, the recall potentially affects 51 different products. This includes the 2018 BMW 540D, 2018–2019 BMW 640I, Rolls-Royce Phantom, 2018–2020 BMW 530e, 530i, 540i, M5, M550i, X3, 2019 Rolls-Royce Cullinan, 2019–2020 BMW 330I, 740Le, 740Li, 745Le, 750Li, 840i, M340i, M850i, X4, X5, X6, X7, Z4, and 2020 Toyota Supra. On certain BMW models, xDrive variants are also included. According to NHTSA campaign No. 19V684000, "The back-up camera and display settings can be adjusted such that the rearview image is no longer visible and the system will retain that setting the next time the vehicle is placed in reverse." If there is no display image when backing up, drivers can't properly see, and the car no longer meets modern safety regulations. Specifically, Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rearview Mirrors."  The recall was filed on September 27, 2019, and BMW plans to begin notifying affected owners in November. BMW, Toyota, and Rolls-Royce dealers will update the vehicles' software, which should fix the problem.