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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.

2019 Mazda3 AWD First Drive Review | Unconventionally incredible

Here's some quick consumer advice: If you were considering buying one of those "premium" AWD compact sedans like the Audi A3 Quattro or the Mercedes CLA250 4Matic, don't you dare, because the 2019 Mazda3 AWD is a far better car than either. And you can have one for under $25,000. Not only does the little Mazda have an interior far nicer than any of its actual competitors, it also drives better than almost all of them, and it's prettier than any car at this segment has a right to be. (I'm talking about the sedan here, not the Mazda3 Hunchback Hatchback.) In short, if you need all-wheel drive but hate the idea of a wasteful, copycat SUV, or if you want a compact sedan and don't want your friends to think you're in a rental car, buy a new Mazda3. Got it? Good. That was easy. But for those of you who want to know how the Mazda3 AWD became so special, I need to give you some background information. Specifically, I need to tell you about my friend John, because we all have a friend like John, and Mazda is like John. John is a genius. Like, a certified, bona-fide human supercomputer. He understands more about most subjects than experts on those subjects. And he walks straight into a wall three times a day. Mazda and John have a lot in common. You might look at some of the things they do and think they're not paying attention. But if you take the time to dig deeper, you learn that there's amazing stuff going on beneath the surface. For example, you might wonder why the Mazda3 has two fuel gauges, one analog and the other a digital facsimile of that analog gauge, four inches apart. Or you may scratch your head that Mazda finally installed Apple CarPlay and Android Auto functionality, only to get rid of the touchscreen those systems are designed to use. You might wonder why a powertrain designed from stem to stern in the name of efficiency — we're talking cylinder-deactivation on a four-cylinder! — can't match the fuel economy of most of its more traditionally engineered competitors. And then you walk towards this car and momentarily forget all of this. The Mazda3 sedan oozes sex appeal. Open the door, get in, and you'll plunk yourself into a seat that's positioned like it's in a sports car: your hips are low, the steering wheel is squarely in front of you, and your legs aren't bunched against a firewall that's a foot too close.

MotorWeek checks out two sides of the '90s Japanese car scene

MotorWeek's Retro Reviews let you feel nostalgic about a huge range of classic cars, and the latest two releases offer a look at two very different sides of the Japanese car market in the 1990s. The video above shows off tuned examples of the Mazda RX-7 and Nissan 300ZX. Check out the clip below to remember the 1997 Honda CR-V, if you want to reminisce about something a little more utilitarian. The RX-7 and 300ZX were among the era's best Japanese sports cars, and these examples' suspension and engine overhauls gave them an extra boost. Peter Farrel Supercars tunes the Mazda, and the vibrant yellow paint and body kit make it look ready for an episode of Initial D. The updated powertrain stands up to the mean styling and gets the RX-7 to 60 miles per hour in 4.5 seconds. The Stillen 300ZX GTZ sports a giant wing, and new turbos take the output to 465 hp. It sprints to 60 in 4.9 seconds. The CR-V sits on the opposite end of the automotive spectrum as the tuned RX-7 and 300ZX, but it's even more important in a historical sense. The Honda (along with the Toyota RAV4 and others) was among the progenitors of today's mega-popular compact crossovers. These early examples set the foundation for offering buyers a utilitarian vehicle in a comfortable package with good fuel economy at an affordable price. The CR-V had some quirky charm, too, like the removable picnic table hidden in the cargo floor. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.