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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.

Premium design and diesels: Mazda may be the next VW

At the Chicago Auto Show, we had a chance to sit down with Jacob Brown, a Mazda PR representative, and Jacques Flynn, a lead exterior designer at the company, to talk about design and where the company is going. One of the themes of our discussion was the company's desire to move its lineup toward a more premium, upscale feel and image – both in terms of vehicle design and powertrains. We realized the company may be looking to take a page from Volkswagen's American playbook, positioning itself as a prime purveyor of affordable, upscale – and most importantly, fun to drive – automobiles. In the case of design, Flynn talked about how Mazda's KODO design language is going to evolve; that the goal is to simplify and refine the look. We discussed the CX-5 as an example of this evolution. Flynn pointed out that the goal was to add more refinement and simplicity, and showed how Mazda achieved this on the CX-5 by straightening the curves from the previous model to give it more visual length and a more taut shape. The grille also was given more depth and detailing, which isn't simplified per se, but does provide a more premium look. View 9 Photos Mazda's upcoming diesel engines are another piece to Mazda's premium puzzle. The company will finally offer a diesel on the CX-5. While Mazda planned not to use urea-injection, it finally resorted to the system so the engine could both meet performance benchmarks and emissions standards. In addition to the efficiency of the engine, Brown said that diesel engines have a premium nature for buyers. This is due in part to the luxury automakers that mainly offer them in the US, such as BMW and Mercedes-Benz, and to the fact that the technology will add some cost to the product. If all of this sounds familiar, it's because you know these characteristics used to describe Volkswagen: a company known for upscale, affordable cars, providing great driving dynamics – and formerly, for efficient and fun-to-drive TDI diesel engines. While we didn't touch on the driving experience of modern Mazdas in our interview, you can simply look at any of our reviews to see that we generally like what the company builds. The only downside is that we may have to wait a while for some models, and others may never show up here. Brown and Flynn both said that the Mazda2 is unlikely to be offered in the US as anything other than the Toyota Yaris iA, since it's hard to convince people that a subcompact is premium. No surprise there.

A '70s F1 car and a first-gen Miata make an amazing lovechild

For no apparent reason, this artist asked what if Mazda built an MX-5-based F1 car? And what if it were from the 1970s, the glory days of James Hunt and Niki Lauda? Here's what it'd look like. Look at it! Look at its adorable little eyes and the huge tires. And the intake! The rendering is by YasidDesign and was done live in front of Facebook followers in a Facebook Live session. It borrows heavily from 1970s F1 cars – it looks like a March 741 served as the basis for the open-wheel portion – and blends it effortlessly with MX-5 styling cues. It all came together in about 90 minutes. Watching the process is remarkable, especially considering YasidDesign is doing the bulk of the work live while taking comments and advice from people on Facebook. Check out the video and YasidDesign's other works on his Facebook page. Related Video: