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Patent application suggests Mazda rotary return

A recent patent application by Mazda reveals that the Japanese automaker is still working on the rotary engine. This could in fact be the Skyactiv-R engine found in the RX-Vision concept from the 2015 Tokyo Motor Show. As with anything Wankel-related, nothing is certain until Mazda makes a production commitment. But this filing suggests that serious development is happening in Hiroshima. The 2011 Mazda RX-8 was the last rotary-powered car you could buy in America. Slow sales, poor fuel economy, and tighter emissions standards prevented Mazda from committing to a follow-up. But the fundamental principles of the rotary - compact size and light weight - perfectly fit Mazda's Skyactiv ethos. (For an explanation of how rotaries work, click here.) In this new engine the intake port sits at the bottom of the engine with the exhaust port on top instead of the other way around. That allows for lower mounting, which improves a car's center of gravity. This rotary is also turbocharged. Putting the turbo up high helps ensure it doesn't get in the way of any body or chassis crossmembers. The implication of those claims is that somebody is thinking about how to put this engine in a car. There are other benefits as well. The short path from the exhaust port to the turbo ensures minimal turbo lag. It also allows for a close-mounted catalyst on top of the enigne, which will help emissions. Another innovation in this new engine is a triangle-shaped rotor that covers part of the exhaust port. This allows for different exhaust flow characteristics. The filing claims that that two of the four orientations allow for less airflow resistance in the exhaust port. As in previous Mazda rotaries, there are two spark plugs to manage ignition timing and combustion. But unlike in the 16X concept, Mazda's last public display of such an engine, the new rotary uses port fuel injection. Keep in mind this is only a patent application. A Mazda spokesperson refused to comment on future product, but commented "As we stated at the Tokyo motor show, Mazda is doing all that it can to bring a rotary to the market." In the meantime, keep your RX-7 prayer candles lit and hope for the return of the rotary before the end of the decade. You can bide your time by reading the entire application here. Related Video: Related Gallery Mazda RX-Vision Concept: Tokyo 2015 View 11 Photos News Source: USPTO via autoevolution Rumormill Mazda Performance rotary mazda rx7

Mazda6 diesel to race at Rolex 24, team and drivers announced

Mazda is getting serious about showing off the Skyactiv-D turbo-diesel four-cylinder engine in the Mazda6. The automaker has just announced it will campaign three diesel Mazda6 racers in the Grand-Am GX class of the upcoming 2013 Rolex 24 at Daytona in a quest to walk away with the company's 24th class win. Mazda partnered with SpeedSource to develop the race version of the new sedan, with Japanese and American engineers lending a helping hand where needed. Meanwhile, Freedom Autosport and Visit Florida Racing/SpeedSource/Yellow Dragon Racing will helm teams of their own.
Each car will make use of a five-driver team for the 24-hour race on January 26. In the interim, you can check out the full press release below for more information as well as the full driver roster. Mazda says we can expect to see the No. 70 SpeedSource car under the lights at the 2013 Detroit Auto Show later this month, as well.

Mazda LM55 Vision Gran Turismo reshapes a winning form [w/video]

In the history of endurance racing, there's only ever been one Japanese automaker to win the famous 24 Hours of Le Mans, and as you might have guessed, that was Mazda in 1991 with the 787B – which was, incidentally, the only one ever to win the race under rotary power, or really anything other than a conventional piston engine. That racing success is something Mazda can be proud about, even over two decades later, and it's a badge of honor the automaker is revisiting with the LM55 prototype you see here. Only instead of unleashing it on the Circuit de la Sarthe – or really any actual race track – the Mazda LM55 Vision Gran Turismo is bound only for PlayStation. The latest addition to the Vision Gran Turismo lineup, the LM55 takes inspiration from the aforementioned 787B but gives it a modern KODO design theme. The result is pretty stunning, taking a more radical approach than the Skyactiv Prototype the company is fielding in the United SportsCar Championship or even the dearly departed, head-turning Furai concept. But unlike that diesel prototype and the Wankel-powered 787B, Mazda hasn't specified any kind of novel powertrain for the LM55, fictitious or otherwise - saying only that it has "advanced drive train technology that offers the epitome of power, efficiency and durability and the result is an exceptional power to weight ratio exceeding that of most cars in its class." Just what that class would be we'll likely never find out, but if you don't have a PS3 loaded with GT6 (or, for that matter, even if you do), you can scope out the virtual action in the slideshow above and the rather Christmas-y video below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Featured Gallery Mazda LM55 Vision Gran Turismo View 23 Photos News Source: Polyphony Digital Toys/Games Mazda Concept Cars Racing Vehicles Videos Gran Turismo gt6 vision gran turismo