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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.

VW Q3 Financial Woes, 2015 Tokyo Motor Show | Autoblog Minute

Consumer Reports pulls its Tesla recommendation, the U.S. Copyright Office offers a ruling affecting car owners, VW gets hit hard with third quarter losses, and lots of exciting news from Tokyo. Autoblog's Senior editor Greg Migliore reports on this Autoblog Minute Weekly Recap. Tokyo Motor Show Mazda Subaru Suzuki Tesla Toyota Concept Cars Autoblog Minute Videos Original Video Tokyo 2015

Mazda CX-30 'just right' crossover will head from Geneva into production

As more and more customers move into the crossover segment, the less the segment is one-size-fits-all, or even three-sizes-fit-all. As such, Mazda has taken the opportunity at the Geneva Motor Show to offer a new, "just right" crossover to its lineup. The 2019 Mazda CX-30, as it's called, slots between the diminutive CX-3 and the compact CX-5 crossovers. The CX-30 shares the "Kodo" (meaning "soul of motion") design language Mazda does so well, and the execution here is excellent, too. We love the long hood and simple but elegant curves, the way the light reflects off the sides in dramatic waves. Its no surprise that Mazda chose its Soul Red Crystal to show off the new model. Mazda says it had four goals for the CX-30, two of which had to do with the size of the vehicle. It needed to be small enough to be highly maneuverable, so that drivers wouldn't hesitate to take it anywhere they need to go, but it also had to be roomy enough to provide a comfortable space for multiple passengers to easily enjoy one another's company. Mazda wanted the design to "embody the joy of owning something that matches your sensibilities." Finally, it had to perform in a way to provide peace of mind and a relaxing driving experience. Mazda will offer the CX-30 with its Skyactiv-G 2.0 gasoline engine with cylinder deactivation, Skyactiv-D 1.8 diesel engine and its new Skyactiv-X engine with gasoline compression ignition. Both gasoline engines will use Mazda's mild hybrid technology to help improve fuel economy without sacrificing performance. The CX-30 will also be offered with Mazda's I-Activ all-wheel drive and G-Vectoring Control Plus for maximum grip and stability. It will be available with either a six-speed manual or six-speed automatic transmission. The CX-30 is equipped with a driver monitoring system to improve safety using an infrared LED and camera to watch the driver's face for signs of drowsiness or inattentiveness. It'll alert the driver to pay attention, and will sound the braking alert earlier. Other active safety systems include available Front Cross Traffic Alert and Cruising & Traffic Support, the latter of which will employ accelerator, brake pedal and steering operations in traffic jams to help avert driver fatigue. Mazda hasn't said whether it will offer the CX-30 outside of the European market. Related Video: