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Automakers' sound systems: Crank it, don't yank it

Years ago, one of the first things most music lovers did after buying a new vehicle was drive to an aftermarket stereo shop to get the crappy stock components swapped for better gear. And you'd typically get not only better sound but also more bang (and boom) for your buck. But in the past decade or so, the overall quality of OEM audio has dramatically increased, while car electronics became more complex, removing the incentive for most new vehicle owners — and all but the most hardcore DIYer — to start from scratch. In 2010, I did a comparison of the average costs for OEM electronics vs. similar offerings from the aftermarket, and back then automakers' stock premium systems were by far the best bargain — and are probably an even better value now. The premium 14-speaker, 1,200-watt JBL system in the all-new 2019 Toyota Avalon is a prime example of this trend. It's standard on the top two Limited and Touring trims and is available as a $680 audio upgrade on the XLE and XSE. I doubt you can even buy 14 speakers and 1,200 watts of amplification from the aftermarket for 700 bucks, much less have it all installed. And because the system is bundled with Toyota's Entune infotainment system, Apple CarPlay and a surround-view camera, removing the head unit means you would likely lose these features. Another advantage of OEMs and their audio partners is they can design the car around the audio system. In the past, automakers would typically place speakers where convenient for packaging, not for optimal sound reproduction, and audio engineers were forced to compromise. But as with the Avalon's premium JBL audio system, this is starting to change. At a recent behind-the-scenes peek for media into the process of developing the system, Toyota and Harman engineers delved into the minutia of sealing the inner panel of the front doors to create an enclosure for 6x8-inch woofers, making space in the pillars for JBL horn tweeters and extensively measuring the acoustic properties of the interior to tune the sound to the space. I'm met some creative and skilled car stereo installers, but none with a degree in psychoacoustics. The system is also the first to feature Quantum Logic Surround that creates a multi-channel listening experience from two-channel sources. And it includes Harman's Clari-Fi processing that "rebuilds key details lost" in compressed audio formats used by streaming music services and MP3s.

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.

Recharge Wrap-up: Audi R18 e-tron Quattro wins WEC opener, Toyota Mirai goes to DC

The Audi R18 e-tron Quattro has won the World Endurance Championship season opener at Silverstone. Drivers Marcel Fassler, Andre Lotterer and Benoit Treluyer piloted the number 7 hybrid racecar to a hard-fought win in the six-hour UK race. "This victory is a dream start of the season and a great reward for the whole squad for the hard work last winter," says Audi Motorsport boss Dr. Wolfgang Ullrich, congratulating the team. Audi's second R18 took fifth place in the race after a couple of unscheduled pit stops ate up precious time. Read more in the press release from Audi, below. Mini and Spanish designer Jaime Hayon are presenting new versions of the Mini Citysurfer electric scooter concept at Salone del Mobile in Milan, Italy. The installation, called "Urban Perspectives" depicts an idea of the future of urban mobility. The imaginary living space houses two examples of the Citysurfer concept designed by Hayon. The first is painted to resemble blue and while porcelain, with dots and stripes to give it an upbeat look. The second uses more upscale materials like anodized metal, copper and leather to blend modern and classical elements. The foldable Citysurfer scooter can travel 10 to 15 miles on a charge, and is designed fit and charge inside the trunk of a Mini Cooper. Read more from Mini. Tesla has announced the locations of its first Superchargers in Australia. It will install eight charging booths at the Goulburn Visitor's Centre, about 120 miles southwest of Sydney. The Goulburn superchargers will be powered by renewable energy. Tesla plans to install a network of Superchargers in cities along the route connecting the Sunshine Coast north of Brisbane south to Melbourne. Read more at Clean Technica. The Toyota Mirai will be on display at the National Mall in Washington DC to celebrate the 45th anniversary of Earth Day. Toyota is a sponsor of Global Citizen 2015 Earth Day from April 17 to 19, which will include speakers, musical performances and, of course, Toyota's new hydrogen fuel cell car. "Earth Day 2015 is a great platform to educate the public about hydrogen fuel cell technology and the potential of hydrogen as a future fuel," says Toyota's Bob Carter. Also in April, Toyota will continue to enlighten the public about the Mirai and hydrogen technology in Union Square Park in New York on April 19, and at Waterkeeper Alliance's "Keep it Clean" comedy event in Los Angeles on April 22. Read more from Toyota.