Mazda Mx-5 Miata 33xxxk Very Low Mile on 2040-cars

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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.

Mazda's Tokyo concept foretells of rotary revival

Mazda has long been rumored to be planning a revival of its rotary-powered sports car. Some of those rumors may have come down to wishful thinking as much as concrete information. But now, on the eve of the Tokyo Motor Show, new details have come to light. The Japanese automaker is slated to unveil a two-door sports car concept, previewed in the teaser image above. Little in the way of firm information has been made available prior to the show car's debut, but sources are now citing senior company officials as confirming it has a rotary engine. "It is a two-door, two-seater, Mazda CEO Masamichi Kogai told Autocar. "It is a pure sports car design. We have MX-5 and another icon is a rotary sports car. We haven't talked about market reach but this would be in that segment." R&D chief Kiyoshi Fujiwara added: "People think rotary can not meet modern eco demands. The SkyActiv engineers worked on rotary and gave it cutting-edge tech. It is an essential part of our DNA and it [will] just be passed onto future engineers. It is synonymous with the brand. Some time in the future it will return and be called SkyActiv-R." The last time Mazda produced a rotary-powered model, of course, was with the RX-8, which ended production in 2012. That was preceded by three generations of RX-7, the first of which will be celebrating its 40th anniversary in 2018. If it manages to get the Wankel technology up to modern standards, that could provide just the right opportunity for Mazda to launch a new model. Reached for comment, Mazda spokesman Jacob Brown told Autoblog: "While we can confirm that Mazda continues to develop rotary engines, we cannot confirm production of a rotary at this point. Rotaries are one of the signature engineering technologies that define Mazda, and we will continue exploring them to see where they may fit for production applications." Related Video:

2019 Mazda3 shows off factory bodykit, Miata gets a hardtop at Tokyo Auto Salon

The 2019 Mazda3 wasn't exactly lacking in the sporty style department when it was shown last month in L.A. But everyone, including Mazda, knows that doesn't mean it can't be even sportier. As such, the company is showing off a version of the new compact hatchback at Tokyo Auto Salon, a modified car and aftermarket parts show, with a body kit. It's a subtle one, consisting of a black front lip spoiler, black side skirts, and a longer, slightly upturned rear spoiler. Its low-key design fits in well with the Mazda3's taut, clean lines, and it makes the car look lower and more purposeful. The Mazda3 isn't the only car getting some love at the Tokyo Auto Salon. The company will display an MX-5 Miata with a removable hardtop made of carbon fiber. Now, you may remember that Mazda does offer a hardtop, but just for racing drivers. That top is a bit odd looking with a really high rear-end to clear motorsports-spec roll bars and cages. This top follows the lines of the roadster's soft top, looking much more sleek. Neither sets of parts here have been announced for production, but we wouldn't be surprised to see them show up as Mazda accessories. The Mazda3 body kit in particular seems a shoe-in, since the previous generation Mazda3 had a very similar appearance package available. The Miata top certainly seems as though it was designed with regular consumers in mind. Its future is less certain, though. For one thing, Mazda can point to the Miata RF if you want a solid roof. Then again, Mazda still offered a removable hardtop for conventional Miata roadsters even after the original power-retractable hardtop model was introduced. If it does come to market, though, expect it to be made from more affordable fiberglass and be painted in factory colors. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.