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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

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.

Mazda Hazumi Concept shows up ahead of Geneva

Last week, Mazda officially teased its Geneva-bound Hazumi concept, showing little more than an aggressive headlamp design. But now, thanks to the magic of the Internet, another rendering of the Hazumi has appeared on the web, and, well, it's totes adorbs.
In Mazda's original release from last week, we were told that the name "Hazumi" means "spring up" or "bound" in Japanese, and is "particularly well-suited to a small car that appears to be bursting with energy." And now that we're getting a nearly full glimpse of the thing, we absolutely have to agree. The company's Kodo design language offers aggressive style in a cute little shape, and the usual raft of concept car-spec treatments (no mirrors, huge wheels, etc.) make it look even more comical and delightful.
Indeed, the Hazumi is understood to preview the next Mazda2 subcompact, and if this concept car points the way forward for Mazda's tiniest hatch, consider us totally geeked. Mazda is also set to debut its new 1.5-liter Skyactiv-D diesel engine at the Geneva Motor Show next week, and while the company hasn't confirmed if that powerplant will make its way into the next Mazda2, it sure makes sense, at least overseas. Stay tuned.