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Watch what happens inside a rotary engine

Since it looks like Mazda may very well revive the Wankel rotary engine as a range extender for electric cars, there's no better time to become reacquainted with the quirky internal-combustion engine. And there's hardly a better way to become reacquainted than by peering into a running rotary engine, which you can do with the video above. The video comes to us from the YouTube channel Warped Perception. The channel has already shown what happens inside a conventional internal-combustion piston engine by putting a clear cylinder head on top of a flathead engine. This new video shows off the rotary engine by adding a clear side to a tiny model-airplane engine, something that we weren't aware existed and are glad to know about now. Despite the tiny size, the engine is functionally almost exactly like the bigger versions you'll find in Mazdas from about 1967 to 2012. It has intake and exhaust ports on the edges of the rotor housing, and the triangular rotor swings about in a peanut-shaped housing. For maximum effect, jump to right around the 7:40 timestamp. This is the point at which a bit of acetylene is added to the air-fuel mix for a brighter flame. It's at this point that you can really see when the mixture combusts and how the pressure of the flame pushes the rotor to produce rotational motion. Each stage of the video does slow things down to make everything as clear as possible. Even if you already knew how rotary engines worked, it's still fascinating to watch, first because it's something you don't get to see usually, and also because of the engine's elegant simplicity. Related Video: Image Credit: YouTube / Warped Perception Weird Car News Mazda Technology Videos rotary rotary engine

2020 Mazda3 Review & Buying Guide | The connoisseur's choice

Completely redesigned last year, the 2020 Mazda3 pretty much carries over, continuing to be the connoisseur's choice for a compact car. For starters, its elegant sedan and unique hatchback body styles are considerably more stylish than expected for this segment. Park it next to a similarly priced Honda Civic or Toyota Corolla and people are likely to think you paid far more than you did. The same goes for the cabin, which is functional yet stylishly minimalist (if a bit cramped). Then there's the driving experience, which continues to delight those who value sharp responses and a driver-focused character. The switch to a less sophisticated rear suspension for this latest generation has dulled some of its corner-taking capability at the limit, but that's a low-percentile complaint. The bigger dynamic beef is perhaps that Mazda doesn't offer a hotter version in the vein of the Civic Si or VW GTI. Yet, that falls under the category of "wishes" not "problems," which the 2020 Mazda3 has scarcely few. Perhaps it won't be for everyone in the market for a compact car, but everyone should at least consider it.   What's new for 2020? After being completely redesigned last year, updates are light for 2020. The base trim level now comes standard with the Mazda i-Activsense suite of accident avoidance tech and driver aids that continue to be standard on every other trim level. 2019 Mazda3 AWD View 33 Photos What's the interior and in-car technology like? The interior quite simply makes you go "wow." A Honda Civic or Toyota Corolla, which are actually quite nice, look and feel like they should cost substantially less – especially when comparing top trim levels. Whatever trim level of 3 youÂ’re considering, however, the key to its wow factor is how the MazdaÂ’s design removes visual clutter by reducing switchgear and effectively hiding air vents and door handles. It just looks special. It's also functional. The steering wheel, which looks sensational, is an absolute treat to hold. There's considerable center console space and Mazda's tech interface, which had lagged behind its competition due to key usability issues, has been cleaned up. The dashtop screen is large and easy to see. The knob that controls it is large, not unlike BMW's iDrive, and ergonomically placed on the center console. It's not a touchscreen, though, as Mazda engineers determined that hunting for touch-operating icons can be distracting.

2019 Mazda6 Skyactiv-D diesel caught in spy photos

We get it – we're a little sick of getting a few years of assurances that Mazda's much-anticipated diesel engine is just around the corner. First, it was going to go in the 2014 Mazda6, then it was delayed. More recently, Mazda told us it'd first land in the CX-5 – and in fact, there's a part of the Mazda USA website devoted to the diesel crossover, which makes it seem more legitimate than previous pronouncements. But the fact of the matter is, there's some unforeseen hiccup in the government approval process for this engine, likely centered around emissions standards, and it seems to be dragging on. But this Mazda6 was spotted at an EPA facility in Michigan, which gives us some hope that perhaps the company is rounding the final base on the approval process. It looks very much like an American-spec Mazda6 to our eyes ... except for the strange, possibly temporary exhaust outlets, which might be required for EPA testing. The rear looks like a current-look car, rather than the revised 2018 styling that will get the 2.5-liter turbocharged gas engine. Since the Mazda6 was originally supposed to get the Skyactiv-D engine, we can only assume that if it's at an EPA facility, Mazda is hoping to bring it to market here – likely sometime after the CX-5 goes on sale. If Mazda can get approval, it'll be another point of differentiation between the Mazda6 and its competitors – there's no currently-approved diesel sedan that's a direct match. The smaller Cruze and larger, more expensive offerings from BMW and Jaguar are about it. The fuel economy guide (PDF) produced by the EPA back in late 2017 lists both the CX-5 and the Mazda6 as having diesel engines, but neither are rated, and as we know at this point, neither are on sale or have an official timeline for doing so. We can assume anything with an application in progress made it on the list, whether approval would be granted or not. It seems unlikely at this point that Mazda would abandon the Skyactiv-D in America. It's a solid part of their strategy, although a product roadmap released a few months ago shows that Mazda expects diesel sales globally to taper off after 2020, to be supplanted by plug-in gas hybrid, EV, and fuel cell vehicles. But between now and about 2030, pure diesel cars are expected to be a small but significant portion of Mazda's product mix. We hope this means we'll see the CX-5 emerge from the approval process and hit dealer lots soon, to be followed by the 6.