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Mazda Skyactiv-X Review | The revolution begins with a squeeze-bang

The matte black Skyactiv-X prototype looks like a rough Mazda3, perhaps reconstructed after a bad wreck by an over-enthusiastic owner of a spot welder and lots of gaffers' tape. Ribbed ducts poke out of the dash sending two breaths of conditioned air to no one in particular. Even its revolutionary engine, the thing we're here to experience, is entombed in a massive, nondescript cover to mask its unseemly noises. It's a wild, strange way to meet a very unconventional vehicle that promises diesel-like fuel economy, a wide torque band, and an exotic method for burning less gas than ever before. It takes a few hours for Mazda's engineers to explain the fundamental principles of operation. For more detail, read our Skyactiv-X Spark Controlled Compression Ignition explainer, but here's a very brief overview. Skyactiv-X marries some traditional gasoline engine characteristics with a novel form of compression ignition called SPCCI. The key for Skyactiv-X is to use very high compression in the cylinder and an extremely lean fuel-air mixture. Squeezed right to the cusp of getting hot enough to blow up all on its own (which is very hard to predict), a squirt of extra gas and a spark interject to cross that compression-ignition threshold in a controlled and predictable manner. See the animation below: That takes a few essential components to get just right. One is a massive amount of computer processing power and some pressure sensors in the individual cylinders, because the ambient conditions change how and when these things happen. Skyactiv-X uses a clutched supercharger to pump in additional air when needed to nail the mixture precisely, and high-pressure injectors to get the low ratios of fuel to disperse properly in the chamber. And since it operates like a conventional gasoline engine sometimes, it uses valve timing to lower the very high compression ratio so it doesn't reach combustion ignition in that mode. In practice, the Skyactiv-X runs in compression ignition mode most of the time. In practical terms, that means it drives like a torquey gasoline Skyactiv engine. The torque curve is broad and flat — diesel-like in that respect. That also means it can get away with using a six-speed transmission and a lower final drive for better response. There's enough grunt and economy together that Mazda can let the engine spin faster — at 60 mph, it's running at roughly 1,000 more RPM than a similar gas engine, with greater efficiency.

Toyota and Mazda set to expand partnership

Toyota and Mazda are already teaming up for the Scion iA and Mazda2, but that partnership might just be the beginning. Reuters reports the two Japanese companies could expand their work together, with Toyota chipping in its experience with both fuel cells and plug-in-hybrid tech, and Mazda contributing its know-how in regards to its Skyactiv line of engines. The report cites a pair of unnamed sources that are "not authorized to discuss the matter publicly." The move, on the surface, is certainly appealing for both parties. Mazda has very little experience with hybrids (remember the Ford-rebadged Tribute Hybrid?), let alone something as advanced as a fuel-cell vehicle. Teaming with Toyota, arguably the world's greatest hybrid manufacturer, would give it a serious leg up. For the Japanese giant, meanwhile, a partnership with Mazda could expand the economy of scale for the Mirai FCV's tech, while Skyactiv engines would do well in replacing the base engines in cars like the Corolla, Camry, and RAV4. What are your thoughts? Would an expanded partnership between Toyota and Mazda make sense? Can you think of any drawbacks? Have your say in Comments. Featured Gallery 2016 Toyota Mirai View 15 Photos News Source: Reuters Green Mazda Toyota Electric Hybrid skyactiv toyota mirai

2019 Mazda CX-5 debuts with turbocharged engine and near-$40K price tag

We've seen a couple different leaks concerning the 2019 Mazda CX-5, but now Mazda finally has official word on what's coming our way. One exciting development is the addition of the 2.5-liter turbocharged four-cylinder engine on higher trim levels. It's great to see Mazda sharing that engine to other models after originally debuting in the larger CX-9. In the CX-5, it makes 250 horsepower and 310 pound-feet of torque on 93 octane. To get the boosted engine, you'll have to opt for one of the two new trim levels Mazda has added for 2019: Grand Touring Reserve or Signature. Of course, with higher trim levels and more powerful engines come higher prices. The Signature trim comes in at a whopping $37,885 including destination charges. For 2018, the highest trim level available was the Grand Touring, and that car costs $30,640. Mazda adds a bunch of new features for the expensive Signature trim, though. You'll get brown leather seats, real wood trim, a uniquely stitched leather steering wheel, 360-degree view camera, a frameless auto-dimming mirror, LED lighting throughout the interior and dark silver 19-inch wheels. These options are in addition to the new and still luxurious Grand Touring Reserve trim level. This trim has heated and cooled seats, a heated steering wheel and power folding mirrors as its highlights. For comparison, the Grand Touring Reserve with the turbocharged engine costs $35,865. Making the CX-5 more luxurious wasn't the only aim for 2019 — Mazda also gave it a new version of its G-Vectoring Control handling system. The updated G-Vectoring (now called G-Vectoring Control Plus) helps when the driver is unwinding the wheel by "adding a hit of braking to the outside front wheel," according to Mazda. This, in addition to some suspension refinements, are supposed to make for a smoother and better ride. Specifically, Mazda says it re-tuned the suspension to reduce friction and adjusted the steering geometry to achieve more natural feeling handling. Sweating over these small handling and feel things is why we typically end up liking the driving experience of Mazda vehicles. Mazda increased prices on the CX-5 across the board, too. The Sport trim is $1,600 more than before, with other trims following suit at similar increases. We'll see how the changes affect the sporty and now more expensive crossover when we get our hands on a 2019 model. For now, you can build them on Mazda's website, and Mazda says they'll be available sometime this fall.