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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.

Race-inspired Mazda 3, CX-5, and Miata look great with white letter tires

At the 2020 Tokyo Auto Salon, a customization show that is kind of like SEMA but definitely not the same, manufacturers promote what is available and explore what's possible. Mazda brought a variety of vehicles to the show, but none more intriguing than the Mazda Motorsports Miata, Mazda3, and CX-5 concepts. The trio has race-inspired graphics, as well as a slew of visual and mechanical changes. The three vehicles have a core pack of changes, then each one has its own signature pieces to create some differentiation. The roadster, hatchback, and crossover have height-adjustable suspensions, upgraded brakes, MazdaSpeed tow hooks, circular number body decals, new wheel nuts, Alcantara steering wheels and shift knobs, special heel plates, MazdaSpeed six-point harnesses, and MazdaSpeed sport seats. The Miata and 3 have Fujitsubo stainless mufflers, while the CX-5 has a slightly different exhaust. The Roadster appropriately has the most involved individual upgrades. It has a body kit with front, side, and rear alterations, and it sits on RAYS ZE40 17x7.5J wheels wrapped in Potenza RE-71R 215 / 45R17 rubber with beautiful white lettering. It also has a Cusco roll bar, a MazdaSpeed rear spoiler, a MazdaSpeed strut bar, and a MazdaSpeed lower arm bar. Inside, the door trim, decoration panel, shift boot, center console lid, and parking brake boot are draped in Alcantara. An aluminum pedal set is adds a final touch of polish. On the Mazda 3 hatchback, the aero kit is specifically noted to be "Signature Style." Mazda also upgraded the strut bar and lower arm bar, and threw on Rays ZE40 18x7.5J wheels in Potenza RE-71R 215 / 45R18 tires, also with white lettering. Black mirror caps, a scuff plate, and a sports pedal set complete the concept. On the CX-5, Mazda made it sportier but also added some crossover-focused features, too.. It has Mazda-styled aero, an Auto Exe sports muffler Rays G25EDGE F1 20x8.5J wheels, Bridgestone ALENZA001 255 / 45R20 tires with white lettering, and a new wheel nut set. It also has a scuff plate, premium floor mats, a premium luggage mat, and sports pedals. For now, these are only concepts, with no word as to whether anything similar could hit Japanese markets, let alone U.S. shores. A Mazda engineer previously said a MazdaSpeed3 wouldn't happen, but the company is reportedly considering a 3 with a 250-horsepower 2.5-liter four-cylinder engine.  Related Video: This content is hosted by a third party.

Mazda recalls 109k Tribute models for rust issue

The Mazda Tribute is being hit with a similar recall as its platform-mate the Ford Escape underwent a few weeks ago. Mazda is recalling 109,000 Tributes from model years 2001 to 2004. On the trucks, the subframe can rust from road salt, potentially causing the lower control arm to detach. If this happens, a loss of steering control could occur.
Mazda is adding a reinforcement crossbrace for added strength on the affected models. The recall covers Tributes currently registered in or originally sold in 20 northern states and Washington, DC, where road salt is used.
The reinforcement braces aren't available yet to do the repair. Mazda will send a letter in May to owners of affected vehicles that will inform them of the problem, and a second letter telling them when the parts will be ready. Scroll down to read the full recall press release.