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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

2019 Mazda CX-5 Turbo First Drive Review | Two-row crossover perfection

Listen: If you're shopping for a crossover, and by all accounts most Americans are, there is no better option on the market than the 2019 Mazda CX-5. When we test drove the all-new 2017 CX-5, we were astounded by its marked improvements over the already-great previous generation. We noted then its biggest drawback was its average 187 horsepower. The CX-5 didn't feel slow, and it certainly made up for it in other ways, like by delivering superior road-hugging abilities. But, it was probably enough to turn off buyers who do their shopping by analyzing spec sheets. For 2019, Mazda addressed that exact issue with a vengeance. With an all-new 2.5-liter SkyActiv Turbo good for 250 horsepower, the CX-5 not only leapfrogs bestselling rivals like the Honda CR-V and Toyota RAV4, but lands squarely in the realm of luxury stalwarts such as the Audi Q5 and BMW X3. When we drove the 2017 CX-5, we likened the handling to that of a Porsche Macan. Now it has the power to match. Among its direct competition, only the 2019 Toyota RAV4 breaks the 200-horsepower mark, ringing in at 203 (and the Hybrid makes an even more impressive 219 ponies), while the Honda CR-V, Subaru Forester and VW Tiguan all sit between 180 and 190. Now, to get the full herd you must fill the tank with 93 octane premium, but if you don't mind leaving a few ponies in the stable you can pump 87 octane for a slight dip to 227 horsepower. The engine adjusts with no ill effects. Even better, torque stays the same no matter what, and the stump-pulling 310 pound-feet of torque comes quick at just 2,000 rpm. The SkyActiv turbo is full of clever engineering tricks, too. There's an exhaust port restrictor, for instance, a narrower channel used only at low engine speeds. Mazda engineer Dave Coleman likened it to a thumb over a firehose, making more exhaust pressure at idle to spool up the turbo, and thus delivering more oomph when you take off from a standstill. Mazdafarians will recognize the mill as the same one that debuted on the 2018 Mazda6. It powers the CX-9 too, Mazda's highly acclaimed three-row crossover. The 3,825-pound CX-5 has 558 fewer pounds to shuffle around than its larger stablemate, making it downright snappy. However, that extra pep does come with a fuel economy penalty, 22 city and 27 highway mpg versus the naturally aspirated version's 24 city and 30 highway mpg.

Mazda recalls 193k CX-9 crossovers over corroded suspension

An issue with the suspension on the CX-9 has prompted Mazda and the National Highway Traffic Safety Administration to recall 193,484 vehicles across the United States. The campaign specifically affects units from the 2007-2014 model years, manufactured between October 24, 2006, and December 28, 2013. In those affected vehicles, the ball joints in the front suspension may corrode due to water leaking into the fitting. According to the statement below, if the ball joint rusts, the front lower control arm could separate, resulting in a loss of steering control. And needless to say, that could lead to a crash. To repair the issue, Mazda will have to replace both the left and right lower control arms, and will naturally do so free of charge, but will undertake the repairs in stages. First, owners of the affected vehicles will receive a notification that a recall campaign is under way. Then they'll get a second letter when the parts are ready and they can bring their vehicles into their local dealers. The company will start first with 2007-09 vehicles, specifically those registered in the snowy states of the Northeast and Midwest. Specifically: Connecticut, Delaware, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, Wisconsin, and Washington, DC. (Oddly, states in the the western portion of the Midwest, as well as the Rocky Mountains and the Pacific Northwest, were not included in that initial phase. Nor was Alaska, for that matter.) After that they'll call in 2010-14 models in the same states before undertaking repairs on vehicles in other areas to the west and south. Related Video: RECALL Subject : Corrosion of Front Suspension Ball Joint Report Receipt Date: JUL 20, 2015 NHTSA Campaign Number: 15V451000 Component(s): SUSPENSION Potential Number of Units Affected: 193,484 Manufacturer: Mazda North American Operations SUMMARY: Mazda North American Operations (Mazda) is recalling certain model year 2007-2014 CX-9 vehicles manufactured October 24, 2006, to December 28, 2013. The affected vehicles have front suspension ball joints that may corrode from water leaking into the fitting. CONSEQUENCE: Over time, the ball joint corrosion may result in the front lower control arm separating from the ball joint, causing a loss of steering control and increasing the risk of a crash.