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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.

2017 Mazda CX-9 Prototype First Drive

If you read our coverage from last week's Los Angeles Auto Show, you'll note that we were extremely fond of the new Mazda CX-9. We like the look of the thing, inside and out, and it promises to be the best-driving entry in the three-row crossover class. We agree wholeheartedly with that claim. You see, we already drove it. Full disclosure: Our test of the camouflaged CX-9 prototype you see here was short, and while we were able to get a good handle on the CX-9's basic driving dynamics, it'll take more than a 30-mile session around the outskirts of LA to uncover the finer details. What's more, these vehicles are not production ready. In fact, according to our handlers at Mazda, the CUV we tested was actually at the stage before pre-production – so basically, a pre-pre-production car. That said, all the details about the engine, transmission, suspension, and steering are "largely final." As you can see in the gallery, the cars we tested were heavily camouflaged both inside and out. As for styling, we love it – see the undisguised pictures from the LA show for more views. And as for inside, we can say leather seats of our Grand Touring model were comfortable and supportive, and the smallish steering wheel felt natural in the hand. Even in pre-pre-production state, the CX-9 was impressively quiet. An extra 53 pounds of under-floor sound deadening, thicker windows, and active noise cancellation all contribute to what Mazda claims will be "among the quietest vehicles in its class." It's worth noting that the good sounds, like the throaty, whooshy noises of the turbocharged engine, found their way into the cabin just fine. The 2.5-liter, turbocharged four-cylinder engine – Mazda's first force-induced Skyactiv engine – is an excellent piece. The 2.5-liter, turbocharged four-cylinder engine – Mazda's first force-induced Skyactiv engine – is an excellent piece. It uses a variable geometry turbocharger, which the company calls a Dynamic Pressure Turbo. Here's how Mazda explains it: Imagine a normal garden hose. Put your thumb over the nozzle, and the force of the water increases dramatically. That's the DPT at low rpms. It features three small exhaust ports to direct exhaust gases into the turbo, making for 17.4 quick-spooling PSI at low rpms. As the revs climb, a flow control valve opens up, redirecting the gases to a trio of larger ports – removing your thumb from the hose, if you will – and keeping the boost up.

Autoblog readers meet the 2016 Mazda MX-5 Miata [w/video]

Mazda dropped off a 2016 MX-5 Miata at our office this week with only two stipulations: don't break it, and don't talk about driving impressions until 3:01 AM Eastern on Monday, June 1. Easy enough. But rather than hold our notes until the embargo lifts, we decided to do something different. By now, you've no doubt read all there is to know about the 2016 Miata, including our review of the Japanese-spec car with the 1.5-liter engine that isn't coming to North America. You know it's smaller than the outgoing NC model. And you know that, at 2,332 pounds, it's nearly as light as the original. But what you, and we, didn't know, is what Miata owners think about the 2016 model. The MX-5 group is incredibly enthusiastic, and they love their cars. Hell, they love each other's cars. So we gave them an opportunity to not only get together, but to get an up-close, informal look at the ND Miata outside of an auto show, several months before it officially goes on sale. Here's what we did. Cars And Coneys Anyone who's familiar with the Woodward Dream Cruise in metro Detroit has no doubt heard of Athens Coney Island in Royal Oak, MI. It's an iconic place, known for its top-notch coney dogs, quick service, and the fact that, on pretty much any warm-weather weekend, you can find cool cars in the parking lot. We called the folks at Athens, told them about our Miata meet-up, and they were immediately on board with coneys, soda, and coffee for our gathering. We first published our meet-up info late last week, and sent the details out on our social media channels, as well. But without any formal RSVP system, we had no idea how many people would show up. And since Mother Nature decided to provide us with gray skies and chilly temperatures, we figured a lot of would-be attendees opted to bail at the last minute. Needless to say, we were surprised to see several Miatas already lined up in the Athens parking lot when we arrived with the ND at 4:40 PM, 20 minutes before the listed 5:00 start time. No one kept a formal count, but our best guess is that something like 50 or 60 cars showed up over the course of three hours. Some folks stayed the whole time, some people only stopped by for a quick cup of coffee. A couple people drove long distances to attend – a few Miatas hailing from southern Ohio, and many from western Michigan. We had a huge mix of cars, too.