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Why Lexus shies away from plug-in hybrids

Lexus may have softened its stance a bit from the anti plug-in vehicle ads the Toyota luxury badge ran last year, but at least one executive from the company casts a pretty critical eye towards the concept as a way to cut both emissions and refueling costs. In fact, Lexus doesn't really buy the fact that buyers of plug-in hybrids are really looking to save both gas and the environment, Green Car Reports says, citing an interview at the recent New York Auto Show with Lexus executive Mark Templin. Templin also said hydrogen fuel-cell technology may be a better way to edge towards zero emissions. Templin decried plug-in hybrid technology because it adds weight to vehicles, which contributes to poor emissions figures in the process. He added that plug-in vehicle buyers are motivated more by potential tax credits and solo driving rights in high-occupancy vehicle (HOV) lanes than cutting back on fuel use. Last summer, Lexus ran an supposedly tongue-in-cheek print ad poking fun at how long it takes to charge a plug-in vehicle and how using air conditioning can shorten a car's charging range. Last spring, Lexus had to backpedal from an anti-electric ad it ran that had serious mistakes about hydrogen infrastructure. News Source: Green Car Reports Green Lexus Toyota Hybrid PHEV

Hydrogen stations that don't work putting a dent in H2 lifestyle

Hydrogen is the most plentiful element in the universe, but it's not abundant enough for some hydrogen fuel-cell vehicle drivers. Southern California lessees of models such as the Hyundai Tucson Fuel Cell SUV are taking to Facebook to voice their complaints about out-of-order fuel cell stations, Green Car Reports says. In many cases, the lack of hydrogen supply has made the cars effectively undriveable. For Tucson Fuel Cell owners, the hydrogen is supposed to be free and unlimited, but Hyundai doesn't manage the stations. One Orange County lessee of a Tucson fuel-cell vehicle hasn't driven the car for over a month because the trio of nearby stations are out of commission. Additionally, some of the stations that do work can only provide about a half-tank worth of hydrogen, once again putting a crimp the driving range of the hydrogen car. California is home to 10 of the dozen public hydrogen refueling stations in the country (there's one each in Connecticut and South Carolina), according to US Department of Energy figures. These sorts of challenges can't help Hyundai's hydrogen efforts. Last month, it was reported that Hyundai has sold fewer than 300 fuel cell vehicles worldwide during the past three years, including about 70 through the first five months of this year. The South Korea-based automaker has said it wants to sell 1,000 fuel-cell vehicles globally by the end of 2015. Fuel-cell drivers and advocates alike are hoping that Toyota will change the game when its Mirai hydrogen vehicles start hitting California roads later this year. Toyota confirmed in May that Mirai US sales would start in October in eight California dealerships. The Northeast is on tap for 2016. Related Video:

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.