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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

Honda, Mazda, Mitsubishi, Mercedes also under diesel emissions scrutiny

The controversy over Volkswagen's diesel emissions scandal isn't limited to the US. In Europe, where diesel engines are far more popular, the issue is shining a harsh light on the NEDC emissions test. As already known, the evaluation does a poor job of reflecting real-world production of NOx, and it appears a significant number of automakers are affected. The Guardian in the UK has been reporting on real-world test results from a company called Emissions Analytics. After the latest round of checks, vehicles from Mercedes-Benz, Honda, Mazda and Mitsubishi were found to generate far more NOx than they should. The newspaper also published similar results for Renault, Nissan, Hyundai, Fiat, Volvo, Jeep, Citroen, VW, and Audi. On average, the figures are about four times over the limit of producing the pollutant. Unlike VW and its defeat device, these automakers aren't actually breaking the rules. The vehicles perform up to the NEDC lab test for emissions, but those results simply aren't translated to the street. "The VW issue in the US was purely the trigger which threw light on a slightly different problem in the EU - widespread legal over-emissions," Nick Molden from Emissions Analytics said to The Guardian. A big fight to decide the future of this issue appears to be on the horizon. Automakers claim that they can't meet the next round of tightening emissions regulations and are asking for compromises. Although, spokespeople for Mercedes and Honda told The Guardian that the brands would be in favor of the stricter rules. Meanwhile, some European governments began backtracking their support of diesels well before this scandal came to light. The added scrutiny certain hasn't helped the future of the oil-burner. Related Video:

Mazda sketches Koeru concept ahead of Frankfurt show

Mazda is giving us an early peek at the Koeru concept set to debut at the Frankfurt motor show. With a name derived from the Japanese word for "exceed" or "go beyond," the model is the latest evolution in the company's long-lived Kodo design language. Sketches tend to distort a vehicle's actual proportions, and the perspective on this one appears to be playing some visual tricks. Some things can't be hidden so easily, though. The Koeru appears to wear a more sharply angled version of Mazda's shield-shaped grille, and the headlights evolve the look of the CX-3 with an even narrower squint. The steeply raked rear hatch provides a coupe-like roofline, but we wonder if the angle is this pronounced in real life. Reports from last year suggest that a new CX-9 is on the way in 2016, and we could be getting a preview with the Koeru. Mazda is also purportedly developing a CX-7 successor. We should get a better idea if this show car represents either of those future CUVs when we can see it in the metal in Germany. MAZDA TO UNVEIL NEW CROSSOVER CONCEPT IN FRANKFURT Mazda Koeru features a distinctly powerful rendition of the KODO design theme Japanese carmaker aims to further raise benchmark in competitive SUV segment Hiroshima / Leverkusen, 7 August 2015. In a world premiere at the 66th 2015 Frankfurt International Motor Show (IAA), Mazda will reveal the Mazda Koeru, a new crossover SUV concept that makes a bold statement in an increasingly popular and competitive segment. Koeru, Japanese for "exceed" or "go beyond", is a fitting name for Mazda's latest venture into the growing crossover SUV market, where the company is again looking to surpass existing standards and raise the bar for performance, efficiency and overall value. With its formidable KODO – Soul of Motion design, the Koeru expresses the power and vitality of a predator along with a unique level of refined dignity. The full line-up of Mazda's latest SKYACTIV Technology, meanwhile, ensures outstanding dynamic performance, fuel economy and safety with no compromise to Mazda's patented driving fun. The carmaker will also display its new-generation model line-up in Frankfurt. Highlights include an all-new Mazda MX-5 complete with accessories as well as several SKYACTIV powertrains. Mazda's press conference takes place at 13:45 (hall 9.0, B16) on 15 September, the first of two press days. The IAA is open to the public from 17-27 September.