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Mazda files patents for a sequential twin-turbo setup

Mazda has a history of interesting engine technologies, from yesterday's rotary engine to tomorrow's compression ignition engine, and new patents show it still may have some internal combustion tricks up its sleeve. The one on display in these patents isn't especially new in concept, though. A sequential twin-turbocharger setup is something Mazda itself used on the third-generation RX-7. But it's something we haven't seen much of lately. It looks like it could have some possible advantages over older sequential systems, and it has some potential advantages for enthusiasts. First a quick and dirty primer for what makes a sequential twin-turbo system distinct from other twin-turbo systems. In many twin-turbo engines, there are simply two turbos that work together as one bigger turbo. They're the same size, and they spool up at the same time. With a sequential setup, at low rpm, a smaller turbocharger is spooled up first at low-rpm for quicker throttle response, and as the rpm and exhaust pressure increases, a valve opens up that allows a larger turbocharger to also spool up and provide high-rpm boost. That's basically how the Mazda design shown above functions. A big flap blocks off the larger turbocharger exhaust inlet, channeling all the exhaust to the smaller turbo. When more exhaust is available at high rpm, it looks like that flap opens up to spool up the big turbo, too. What's interesting here is that the way the turbochargers are packaged takes up less space than past systems. It looks like both turbos are contained in one unit that shares the same exhaust outlet, meaning the exhaust manifold could be kept simple and compact. In fact, the piping for compressed intake air could also be shared, reducing the amount of piping, which would further decrease the amount of materials and possible failure points. There are a number advantages of making this system smaller. The potential applications of the system are much greater, since it could fit in smaller cars with smaller engine bays. Making the system smaller also means that there won't be as much weight, which is important from both fuel economy and performance standpoints. Finally, the smaller setup likely uses fewer materials, which could make the system cheaper and thus easier to offer on a wider range of vehicles, or at least more profitable for Mazda.

Mazda Koeru concept forecasts next CX-9 in sleek form

Mazda rolled in to the Frankfurt Motor Show this year with the Koeru concept you see here. The showpiece is the latest embodiment of the Japanese brand's Kodo design language, applied with dramatic effect to a large crossover shape. Could this preview the next CX-9? The Koeru takes its name from the Japanese verb for "going beyond," and the reason is plain to see: though created by a mass-market brand, the concept could easily belong to an upscale marque like Infiniti (which offers a range of crossovers), Jaguar (which just revealed its first), or Maserati (which is preparing to get in on the action as well). It strikes us as aggressive as it is elegant, with taut lines and sporty details from the sharp lights to the muscular wheel arches. Few technical details as to what lies underneath it all were made available. And these show cars often lack working underpinnings to speak of anyway. But Mazda says that, beyond the styling, it optimized the aerodynamics over the upper body as well as underneath it to reduce turbulence and "enhance vehicle stability when driving at speed." It's also said to encompass the company's latest Skyactiv, i-Activesense, and Mazda Connect technologies. Which is all well and fine, but we're looking forward to seeing what innovations the company might incorporate if and when the Koeru (hopefully) transitions from concept to reality. In the meantime you can scope it out in the live and stock image galleries above and below. MAZDA KOERU The all-new crossover concept proposed by Mazda Mazda Motor Corporation is unveiling the all-new crossover concept Mazda KOERU for the world premiere at the Frankfurt Motor Show this year. The Mazda KOERU demonstrates Mazda's unique and daring interpretation of a crossover vehicle, proposed for the fast-growing crossover market. Featuring the full suite of Mazda's new-generation SKYACTIV technologies and designed under the KODO—Soul of Motion design language, the concept offers sporty yet delightfully refined styling and driving performance. The name "KOERU", which literally means "exceed" or "go beyond" in Japanese, comes from Mazda's aspiration to deliver value that goes well beyond the existing category norms and standards. As the latest incarnation of Mazda's new-generation products, the Mazda KOERU crossover concept offers styling that exudes power, vitality and a new level of polished refinement.

Mazda3 successor due in dealers this fall

Following exciting new models like the 2013 CX-5 and 2014 Mazda6, Mazda is getting ready to introduce the next generation of its high-volume compact, the Mazda3. After talking to several of Mazda's dealers, Automotive News is reporting that the automaker is planning to introduce its new compact this fall, which is earlier than what was originally reported.
Aside from what we've seen in recent spy shots and what appeared to be a full-scale design mockup back in October, there is little information about the third-generation 3, but we can see that the car will get plenty of cues from Mazda's stylish Kodo design language, and we expect even more technologies from the company's SkyActiv efficiency program to come to bear. AN says that Mazda is hoping to top 300,000 sales this year in the US, and the sooner Mazda can replace the current aging 3, the better chances it has at reaching that goal.