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Weekly Recap: Mazda's rotary revival ignites Tokyo Motor Show

Forty-eight years ago Mazda pioneered rotary engines in the Cosmo Sport. Mazda then honed the technology, won with it on the racetrack, and made it one of its signature features. If you're an enthusiast, rotary was a reason you like Mazda. It's a great part of the company's past. But until this week, that's exactly what we thought it was. History. That all changed with the reveal of the RX-Vision concept at the Tokyo Motor Show, which reignited the passions of the Mazda faithful. Suddenly, rotary was no longer a relic. The rotary concept shown in Japan was a front-engine, rear-wheel-drive sports car wrapped in the company's latest Kodo design language. It's powered by a Skyactiv-R unit (R for rotary), though specs were not disclosed. Mass production is "currently on hold," Mazda said, maintaining it never stopped development of rotary technology, even after the demise of the RX-8. Beyond that, we know nothing, other than the optimistic statement Mazda offered that: the "RX-Vision represents a vision of the future that Mazda hopes to one day make into reality." Put simply: we agree. OTHER NEWS & NOTES: Subaru previews next-gen Impreza While the Mazda concept was the headliner from Tokyo, Subaru's Impreza design study also stood out. The five-door concept is a signpost for the look of next-generation Impreza. It blends sportiness with functionality, and it's wrapped in a striking shade of 'high-luminance silver.' The fenders are flared to signal Subaru's all-wheel-drive capability, and the front has futuristic headlights that look like something from an Audi E-Tron concept. While most of this will be toned down in production, the concept suggests an elevated style for the Impreza, which is due as a 2017 model. Porsche adds potent GTS model to 2017 Macan line Porsche is giving the Macan crossover the GTS treatment, which will start at $68,195 when it goes on sale in March. GTS translates to more power, a sportier suspension, and interior and exterior design cues that sharpen the looks and reflexes of one of the most athletic SUVs on the market. Porsche recalibrated the 3.0-liter twin-turbo V6 from the Macan S to make 360 hp and 369 lb-ft, (up from 340 hp and 339 lb-ft in the S). It teams with a seven-speed PDK gearbox and all-wheel drive. An air suspension is standard. The body features a slew of black accents, and the standard 20-inch RS Spyder wheels are done up in a shade of satin black. The cabin gets leather, Alcantara, and GTS logos.

Basic Continuously Variable Transmission explained with Legos

In recent years, the search for better fuel efficiency and smoother shifting has produced automatic transmissions with double-digit gears. Alternatively, the same quest has boosted the popularity and usage of a different type of automatic transmission without any fixed gears, the continuously variable transmission, or CVT. YouTuber Sariel's Lego Workshop recently took the time to build a CVT demonstration model out of Legos to help explain how they work. Sariel begins by showing the model's input and output shafts that are parallel to each other. Each shaft has a cone attached to it, and they are inversely placed so that the large part of one cone is next to the small part of the other cone. The two cones are connected using a rounded rubber band.  By shifting the rubber band up and down the cones, the machine changes the effective ratio between the cones. So, a 1:4 ratio can be smoothly transitioned to 4:1. No clutch is required to operate the mechanism, and it eliminates hitches or pauses between gear changes. CVTs are also advantageous over 9- or 10-speed automatics in that they are far less complex and weigh less.  To demonstrate how the CVT operates in a vehicle, Sariel used a joke about Top Gear. The original Top Gear is represented by a faster-moving car that has the rubber band around the large part of the cone on the input shaft. Top Gear without former hosts Richard Hammond, Jeremy Clarkson, and James May is represented by a slow-moving car with the rubber band around the large part of the cone on the output shaft.  For an even more detailed explanation of how CVTs work — albeit one that doesn't involve toys — you can click here. Technology Toys/Games Nissan Subaru

BTW: Subaru's SHARC won the 2012 Design Challenge

Part of the festivities that encompass the LA Auto Show is the annual LA Design Challenge. This year's winner was the Subaru Highway Automated Response Concept, or SHARC. It envisioned automated, zero-emission highway patrolling.
The 2012 edition of the challenge was to envision the future of highway patrol in the year 2025. The goal was to conceptualize a vehicle that would account for the needs of "dynamic urban environments." In addition to Subaru's participation in the contest BMW, General Motors, Honda and Mercedes-Benz, all took part in the challenge.
The SHARC is essentially a law enforcement land-drone. It is entirely automated and runs on renewable energy. Subaru envisioned a future where the Hawaiian Islands are connected to each other by a large highway system. Such an expansive area would require considerable manpower to patrol. The concept of an autonomous patrol vehicle would eliminate the need for a good number of full-time personnel.