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Tougher than steel: Wood pulp could make lighter auto parts

KYOTO, Japan — The global push among carmakers to make ever lighter vehicles is leading some auto suppliers in Japan to turn to what seems like an unlikely steel substitute — wood pulp. Japanese researchers and auto component makers say a material made from wood pulp weighs just one-fifth of steel and can be five times stronger. The material - cellulose nanofibers — could become a viable alternative to steel in the decades ahead, they say, although it faces competition from carbon-based materials, and remains a long way from being commercially viable.> Related: Jay Leno drives the Renew cannabis car — hemp you can't dent Reducing the weight of a vehicle will be critical as manufacturers move to bring electric cars into the mainstream. Batteries are an expensive but vital component, so a reduction in car weight will mean fewer batteries will be needed to power the vehicle, saving on costs. "Lightweighting is a constant issue for us," said Masanori Matsushiro, a project manager overseeing body design at Toyota. "But we also have to resolve the issue of high manufacturing costs before we see an increased use of new, lighter-weight materials in mass-volume cars."A NEW PROCESS Researchers at Kyoto University and major parts suppliers such as Denso Corp, Toyota's biggest supplier, and DaikyoNishikawa Corp, are working with plastics incorporated with cellulose nanofibers — made by breaking down wood pulp fibers into several hundredths of a micron (one thousandth of a millimeter). Cellulose nanofibers have been used in a variety of products ranging from ink to transparent displays, but their potential use in cars has been enabled by the "Kyoto Process," under which chemically treated wood fibers are kneaded into plastics while simultaneously being broken down into nanofibers, slashing the cost of production to roughly one-fifth that of other processes. "This is the lowest-cost, highest-performance application for cellulose nanofibers, and that's why we're focusing on its use in auto and aircraft parts," Kyoto University Professor Hiroaki Yano, who is leading the research, told Reuters in an interview. The university, along with auto parts suppliers, are currently developing a prototype car using cellulose nanofiber-based parts to be completed in 2020.

Fiat 124 spied with top down

With fall officially here, the days are rapidly running out for much of the country to put the top down and enjoy a convertible. Fiat apparently wants to take advantage of the good weather while it lasts, given these fresh spy shots of the 124 Spider testing with the roof down. In terms of styling, these photos show the droptop with an extremely similar look to the ones from July. The roadster still appears to have rounded headlights and a wide grille up front, which the kidney-shaped cladding does nothing to hide. The hood bulge continues to be there, too, and so is the spiderweb-pattern camouflage. However, these new shots let us check out the roll hoops that are visible with the top out of the way, and we even get to see the manual roof in operation. Also, note there are now dual exhausts at the rear, rather than the quad tips from before. Underneath all this camo and cladding, we know that the 124 Spider shares underpinnings with the new Mazda MX-5 Miata. The engine remains a mystery, but competing rumors suggest the 1.4-liter turbocharged four-cylinder from the current 500 Abarth or the 1.7-liter turbo four from the Alfa Romeo 4C. Thankfully, an answer might not be too far away because the roadster is mooted to debut this year, possibly at the Los Angeles Auto Show in November. With the latest Miata receiving high praise from critics, the motoring world soon gets to find out whether Fiat can find any room for improvement. Related Video:

Mazda Hazumi Concept shows up ahead of Geneva

Last week, Mazda officially teased its Geneva-bound Hazumi concept, showing little more than an aggressive headlamp design. But now, thanks to the magic of the Internet, another rendering of the Hazumi has appeared on the web, and, well, it's totes adorbs.
In Mazda's original release from last week, we were told that the name "Hazumi" means "spring up" or "bound" in Japanese, and is "particularly well-suited to a small car that appears to be bursting with energy." And now that we're getting a nearly full glimpse of the thing, we absolutely have to agree. The company's Kodo design language offers aggressive style in a cute little shape, and the usual raft of concept car-spec treatments (no mirrors, huge wheels, etc.) make it look even more comical and delightful.
Indeed, the Hazumi is understood to preview the next Mazda2 subcompact, and if this concept car points the way forward for Mazda's tiniest hatch, consider us totally geeked. Mazda is also set to debut its new 1.5-liter Skyactiv-D diesel engine at the Geneva Motor Show next week, and while the company hasn't confirmed if that powerplant will make its way into the next Mazda2, it sure makes sense, at least overseas. Stay tuned.