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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 announces Takata expansion in US to 472k vehicles [UPDATE]

Update: Mazda is revising the total number of vehicles affected by its Takata airbag inflator recall downward to 464,684 units, compared to the original NHTSA documents showing 472,056. According to Mazda Public Affairs Manager Tamara Mlynarczyk to Autoblog, "It is my understanding that Mazda Japan will be submitting a revised Part 573 on Monday that reflects our numbers." The company's official statement on the recall is now included below. Mazda is the latest automaker in the US to officially announce the details of its expanded Takata airbag inflator recall. The company is broadening its campaign to cover a total of 472,056 vehicles. Mazda's airbag inflator recall covers now the front driver's side for the 2003-2008 Mazda6 produced between May 29, 2002, and May 5, 2008, the 2004-2008 Mazda RX-8 from between April 10, 2003, and February 18, 2008, and the 2006-2007 Mazdaspeed6 made between August 4, 2005, and June 29, 2007. Among these three models there are 444,907 units affected. This is an expansion from of the previous total of about 330,000 examples from 2004-2008. The passenger-side airbag of the 2004-2006 B-Series pickup is also being recalled for those with build dates between April 17, 2003, and May 2, 2006. There are 27,149 of these vehicles in need of replacement parts. Takata's airbag inflator recalls have affected 34 million vehicles nationwide from 11 automakers. In a recent hearing before Congress, Takata said it was producing 740,000 replacement kits a month and hoped to grow that to a million. Other suppliers have also started making the parts. Related Video: RECALL Subject : Driver's Frontal Air Bag May Rupture Report Receipt Date: JUN 04, 2015 NHTSA Campaign Number: 15V345000 Component(s): AIR BAGS Potential Number of Units Affected: 444,907 All Products Associated with this Recall Vehicle Make Model Model Year(s) MAZDA MAZDA6 2003-2008 MAZDA MAZDASPEED6 2006-2007 MAZDA RX-8 2004-2008 Details Manufacturer: Mazda North American Operations SUMMARY: Mazda North American Operations (Mazda) is recalling certain model year 2003-2008 Mazda6 vehicles manufactured May 29, 2002, to May 5, 2008, 2004-2008 RX-8 vehicles manufactured April 10, 2003, to February 18, 2008, and 2006-2007 Mazdaspeed6 vehicles manufactured August 4, 2005, to June 29, 2007.

Mazda boss says no to new-generation Mazda3 hot hatch

Mazda offered a hot, turbocharged version of the Mazda3 model during the car's first two generations, badging it either the MPS or the Mazdaspeed 3 depending on the market. The third generation car didn't get a hot-hatch variant, and now Mazda is saying there won't be one for the freshly revealed fourth-gen car, either. Mazda's new global boss, Akira Marumoto, told Australian motor journalists at the Los Angeles show that there won't be an MPS in the cards. As Drive quotes Marumoto: "Mazda is a small player, and if [you are asking whether] that segment has a high particular priority for Mazda, my answer would be no. Therefore we not planning for MPS in the future." Marumoto stated that Mazda would rather establish itself as a genuine premium carmaker comparable to its European rivals, stressing that this would be achievable through quality, comfort and refinement improvements in the existing lineup rather than expanding into other segments. As well as nixing the Mazda3 MPS, Marumoto also said that despite repeated queries, the function of the 2015 Tokyo Motor Show car RX Vision was to preview the evolution of the Kodo design language and not to herald the arrival of a new rotary sportscar. So, it's time to cue the Mazda Kills Rotary Sports Car Again headlines. Marumoto also told journalists that there won't be an EV sports car or a completely driverless car from Mazda either: He said he prefers the smell of gasoline to full electric power, and that Mazda will never build a car without a steering wheel. For Mazda, autonomous capabilities would serve to bring the car to a safe halt in the case of an incapacitated driver, instead of doing the driving. However — and there is a strong "however" — Mazda did tell us that the turbocharged 2.5-liter engine does fit into the new 3. Mazda representatives said that the header on the naturally aspirated version is big enough as it is, making it easy to shoehorn in the 250-horsepower turbo version without issue. They also said that the company is closely monitoring buyer demand, which originally led to the turbo being available on the Mazda6 and CX-5, along with justifying the introduction of all-wheel-drive in the new Mazda3. So: if there is a case for it, the turbo might come — just don't call it a Mazdaspeed 3, or view it as an overt hot hatch. But the shoe fits.