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Mazda hard at work on Skyactiv 2 engine technology

As Mazda continues the current rollout of its still-new Skyactiv technology, the automaker is already looking at improving its family of engines for even better fuel economy and emissions reductions. Automotive News reports that with stricter fuel economy and emissions regulations planned for 2020 and 2025 in Europe, Mazda will likely release engines with next-generation Skyactiv 2 technology by the end of this decade, and Skyactiv 3 units just five years later.
The latter is expected to focus on improved engine cooling and lessening energy losses, but the big news in AN's report is that the next-gen Skyactiv 2 engines will use Homogeneous Charge Compression Ignition, or HCCI. This type of ignition is very similar to how a diesel engine operates (with high compression and using the compression stroke for fuel combustion rather than spark plugs), a method said to provide a cleaner and more efficient fuel burn - to the tune of a 30-percent improvement in fuel economy compared to current Skyactiv engines. Other automakers, including Hyundai, have already announced they are developing HCCI powerplants with similar technology and characteristics, so Mazda likely won't be a lone wolf here.
Equipped with HCCI technology, Mazda figures to be able to compete with larger automakers in terms of fuel economy and emissions without resorting to hybrid powertrains, continuously variable transmissions or automatics relying on more forward gears (eight or more) for optimal efficiency. Some of the challenges of HCCI, according to AN, include the need for better engine cooling, risk of misfire at high and low rpm and uneven engine performance based on fuel properties.

Mazda engineers say current Skyactiv-X might not suit U.S. market

We've been watching Mazda roll out the 2.0-liter four-cylinder Skyactiv-X engine in Japan and Europe, waiting our turn. When European authorities released fuel economy information for the high-tech motor last June, we wrote, "Mazda has yet to make an official decision on timing for the U.S market's launch of the engine." Automotive News spoke to Mazda engineers in charge of the powertrain, and based on the answers AN got, the question might not be when we get the Skyactiv-X, but if. Seems that the automaker now isn't certain whether the cost/benefit analysis for the U.S. market favors the engine, and there's concern the 2.0-liter might not be powerful enough for us with its current output of 178 horsepower and 186 pound-feet of torque. At the moment, our Mazda3 is served only with a 2.5-liter Skyactiv-G engine producing 186 hp and 186 lb-ft., not too far ahead of the Skyactiv-X. The Skyactiv-X would return better fuel economy, but requires a noteworthy price premium over the Skyactiv-G. The Truth About Cars says the Skyactiv-X has become the top-seller in the Japanese-market Mazda3, even though it costs 27% more than the base, 2.0-liter Skyactiv-G for a 9% improvement in fuel economy. Mazda's not sure U.S. customers would care much for that kind of math. Engineer Yoshiaki Yamane told AN, "Maybe U.S. customers require more power, because fuel economy is not the top requirement." There isn't much Mazda can do about the tech-heavy engine's cost, since pricey equipment like the high-pressure fuel injection and combustion systems, supercharger, three-way catalyst, and 24-volt mild-hybrid system provide the mileage gains that are the engine's reason for being. Instead, engineers are researching the system's effects with larger displacements. If it works as desired, a larger and more powerful Skyactiv-X could come to the U.S. on the large-vehicle architecture Mazda's developing for new sedans to arrive in a couple of years. That's the hope, at least. Remember, Mazda's Skyactiv-D was meant to go into the 2014 Mazda6, but didn't because Mazda said it needed more time to find "the right balance between fuel economy and Mazda-appropriate driving performance." After five years of "Soon," the engine showed up on the 2019 CX-5 that starts at $42,045. Based on that template, it could be awhile before we know how the U.S.-market Skyactiv-X story ends. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences.

Sunday Drive: Tracking Tokyo's top performers

The big news of the week mostly came from Tokyo. All of Japan's biggest automakers made waves at the Motor Show, but the winner of the event has to be Mazda. The big Vision Coupe and little Kai Concept stole the show, won our hearts, and earned a ton of attention for the automaker. We can't wait to see how these two concepts impact the design, engineering, and technology of future production models. Take a look at our mega image gallery post below to see everything in high-resolution glory. Interestingly, the single biggest click-magnet of the 2017 Tokyo Motor Show was the BMW X2. We shouldn't be surprised. Crossovers of all shapes and sizes dominate the American marketplace, and the X2 is clearly the most attractive of BMW's even-numbered, coupe-influenced X models. Plus, it's headed for production, with sales starting in the spring of 2018. Moving past the Tokyo Motor Show, Autoblog readers are apparently very interested in the 2019 Chevy Camaro. Spy shots of just about every iteration of Chevy's muscle car lit up the 'net last week, leaving us very interested in seeing what's hiding behind all that camouflage. As always, tune in to Autoblog next week for a front-row seat to all the happenings worth following in the automotive industry. 2017 Tokyo Motor Show | Mega Gallery Mazda Vision Coupe | Tokyo Motor Show's big, sensuous 4-door Mazda Kai concept hints at a more muscular, refined Mazda3 2018 BMW X2 crossover revealed, adorned in gold and silver 2019 Chevrolet Camaro: 1LT, SS, ZL1 all spied with updated styling