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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.

2016 Mazda CX-5 keeps it simple

Take a long, hard look, folks. This is the refreshed 2016 Mazda CX-5, which makes its debut at the Los Angeles Auto Show today. And if you're thinking, "Say, that looks just like the old one," you really aren't alone. The visible updates certainly aren't major - Mazda has instead focused on giving the already-good CX-5 some thoughtful upgrades to make it a more attractive package than ever.
Outside, there are some slight changes to the styling, including new LED light signatures at the front and rear, as well as redesigned foglamp housings. Uplevel models also ride on attractive new 19-inch alloy wheels, with a dark finish.
Under the hood, it's all the same. Mazda's Skyactiv 2.0- and 2.5-liter four-cylinder engines carry over, with 155 and 184 horsepower, respectively. Front-wheel-drive, 2.5-liter models get a small bump in fuel economy, too - the CUV is now rated at 26 miles per gallon city and 33 mpg highway, up from 25/32. Models equipped with the automatic transmission now benefit from different drive modes, as well.

Mazda teases CX-4 for the Beijing Motor Show

Mazda will unveil the CX-4 crossover at the Beijing Motor Show in late April, and the company's single teaser image (above) suggests the CUV might borrow styling cues from the larger Koeru concept. Mazda kept details about the CX-4 light for now but says in the announcement, "this is a new type of crossover SUV designed to help customers live more creative lives." The teaser photo offers some hints about the design. For example, the rear pillar comes to a point and features chrome accents, which are elements from the Koeru and production CX-9. The arching roof rail suggests a coupe-like shape because it arcs downward to the hatchback. The name also hints that this model slots between the CX-3 and CX-5 in the lineup, but the CX-4 appears to prioritize style over utility. We can't wait to get a better look because this picture doesn't offer much detail. The company will also show versions of the Mazda3 and Mazda6 for the China Touring Car Championship at the Beijing show. Related Video: Mazda to Debut New CX-4 Crossover SUV at Beijing Motor Show - Twelve models on display including new-generation Mazda3, CX-5 and Mazda6 - HIROSHIMA, Japan—Mazda Motor Corporation will debut the all-new Mazda CX-4 crossover SUV at the Beijing Motor Show.*1 The automaker's stand at the show will feature twelve vehicles, including new-generation models such as the Mazda3, Mazda CX-5, Mazda6, and race cars prepared for the Mazda-sponsored MZ Ruisi Racing Team competing in the China Touring Car Championship (CTCC). The CX-4 is the latest addition to Mazda's new-generation lineup of models featuring the full range of SKYACTIV Technology and KODO-Soul of Motion design. With a striking presence that sets it apart from other SUVs, the functionality modern users expect and Jinba-ittai driving thanks to Sustainable Zoom-Zoom, this is new type of crossover SUV designed to help customers live more creative lives. In addition to the CX-4, Mazda will display other vehicles and technologies that represent the brand. Mazda aims to enrich people's lives through a variety of touch points and become a brand that maintains a special connection with customers. *1 Also known as 2016 Beijing International Automotive Exhibition. Press days are April 25-26. Special invitation days are April 27-28. Open to the public from April 29 through May 4.