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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 adds more than 1.1 million vehicles to previous fuel pump recall

A Toyota and Lexus recall that previously listed nearly 700,000 potentially affected vehicles has been amended to include more than 1.1 million new rides. Overall, more than 1.8 million cars, trucks, crossovers, and SUVs are part of a voluntary recall regarding fuel pumps that might stop working.    On January 13, 2020, Toyota announced a safety recall for 695,541 Lexus and Toyota models. It included the Toyota 4Runner, Camry, Highlander, Land Cruiser, Sequoia, Sienna, Tacoma, Avalon, Corolla, and Tundra, plus the Lexus LS 500, LC 500, RC 350, RC 300, GS 350, IS 300, ES 350, LX 570, GX 460, RX 350 NX 300, RX 350L, and GS 300. The Avalon, Corolla, NX 300, RX 350L, and GS 300 in the initial recall were specifically 2019 model years, while the rest were 2018-2019.  Today, March 4, 2020, Toyota stated it has expanded the recall to approximately 1.8 million vehicles total. Toyota did not provide a specific number, but here is the full list of potentially affected cars:  2013-2015 Lexus LS 460 2013-2014 Lexus GS 350 2014 Toyota FJ Cruiser, Lexus IS-F 2014-2015 Toyota 4Runner, Land Cruiser; Lexus GX 460, IS 350, LX 570 2015 Lexus NX 200t, RC 350 2017 Lexus IS 200t, RC 200t 2017-2019 Toyota Sienna; Lexus RX 350 2018 Lexus GS 300 2018-2019 Toyota Avalon, Camry, Corolla, Highlander, Sequoia, Tacoma, Tundra; Lexus ES 350, GS 350, IS 300, IS 350, LC 500, LC 500h, LS 500, LS 500h, RC 300, RC 350, RX 350L On these vehicles, a low-pressure fuel pump inside the fuel tank could fail. If this fuel pump fails while the vehicle is in use, the vehicle could sputter and stall. Without warning of the impending malfunction, other than some lights on the dashboard, this could present a dangerous situation for the driver.  For all affected vehicles, Toyota and Lexus will replace the faulty parts with "improved" fuel pumps. Notifications will start in May. Recalls Lexus Toyota

Toyota gives up more information on Frankfurt-bound Yaris Hybrid-R concept

Toyota has undeniably carved out a niche for itself as the industry's leader in hybrid propulsion. What started out with the original Prius in 1997 has, over the past sixteen years, ballooned to what Toyota reports as a global hybrid portfolio of 23 models. But few (if any of them) are particularly exciting.
That's where the Yaris Hybrid-R concept comes in. Set to be showcased along with the rest of Toyota's hybrid and fuel-cell lineup at the upcoming Frankfurt Motor Show next month, the concept starts with one of the Japanese auto giant's least exciting models and upgrades it to more enticing territory. Toyota Motorsport GmbH - the same Cologne, Germany-based division that operated the company's F1 team, currently runs its Le Mans program and gave us that bonkers 650-horsepower Lexus LS - has slotted in a version of Toyota's new 1.6-liter Global Race Engine and paired it with a couple of electric motors for hybrid propulsion and through-the-road all-wheel drive.
Like the TS030 Hybrid LMP1, the Yaris Hybrid-R concept uses a super capacitor (instead of a conventional battery) to store the regenerated brake energy and give it upwards of 400 horsepower. That's about all Toyota is revealing at this point, but this is the first time it has confirmed the project is based on a Yaris, of all things, and the confirmation comes with the solitary teaser rendering you see above. Check out the press release after the jump and watch this space for more as Frankfurt fast approaches.