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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.

Mazda6 diesel may finally launch this year according to CARB certification

For close to a decade, Mazda said it would bring its latest generation of diesel engine, Skyactiv-D, to the United States. And for most of that time, it said that engine would appear in the Mazda6. Last year Mazda finally brought us the engine in the CX-5, and it looks like this year, the 6 will finally get it, too. This seems to be the case based on a CARB certification posted on January 31 specifically for the midsize family sedan. The CX-5, in both front-wheel- and all-wheel-drive variants, is listed in a different certification, so it's not a case of a blanket certification for every vehicle the engine could appear in this year. As expected, the document lists the 6 as having a 2.2-liter turbocharged engine with a six-speed automatic, though it doesn't say whether the model is front-wheel-drive or all-wheel. Either is certainly possible, since all-wheel drive, in particular with the diesel, is available in overseas Mazda6s. Like in the CX-5, the engine will probably make 168 horsepower and 290 pound-feet of torque. While this certification tells us the diesel 6 will probably launch this year as a 2021 model, we're left to estimate the reveal date. Midway through the year, or possibly at the start of the next auto show cycle would seem likely, which would coincide with a model year update. Mazda has stated it will only be offered on the top-tier Signature trim, which starts at $36,345 with the standard turbocharged gasoline 4-cylinder. Looking at the price difference between a turbocharged Mazda CX-5 Signature with all-wheel-drive and the diesel CX-5, the price difference is about $4,000, so it would seem reasonable to expect the Mazda6 diesel to ring in at about $40,000. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Updated Mazda6 Wagon to look lovely in Geneva

For the 2018 model year, Mazda updated the Mazda6 sedan with some design and mechanical tweaks. It will take the stand for its European debut at the 2018 Geneva Motor Show. There, it will be staged alongside the Mazda6 Wagon, which will be getting its own global debut at the Swiss expo. Unless there's some sort of miracle, we won't be getting the five-door version here in the United States, which is a shame, because it's a beautiful wagon. Customers here — apart from a handful of die-hard fans and, perhaps, the entirety of the American automotive press — prefer something with a bit more elevation to it. Ask a Mazda dealer in Michigan or Arizona for a Mazda6 Wagon, and they'll probably try to sell you a CX-5 instead. That frustrates the wagon fans. "It's gorgeous," said Autoblog Associate Editor Joel Stocksdale. "It kills me that we don't get it." The Mazda6 Wagon, like the new sedan, features an updated exterior and interior design, new seating, better performance, and improved driving dynamics. The Mazda6 Wagon will be on the show floor with a number of other beautiful cars, including the Mazda Kai and Vision Coupe concepts, which bowed at the Tokyo show. Mazda will also showcase its new gasoline-powered Skyactiv-X spark controlled compression ignition, which we were recently able to test in a prototype vehicle. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Design/Style Geneva Motor Show Mazda Wagon 2018 Geneva Motor Show mazda6 wagon