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Mazda's next-gen SkyActiv engines will drop spark plugs in favor of high compression

Homogeneous charge compression ignition, or HCCI, is the black art of internal combustion engines that aims to produce diesel-like fuel efficiency for the cost of gasoline. Although some of its competitors have developed and subsequently given up on the tech, Mazda confirmed that the next-generation of SkyActiv engines will employ HCCI technology, improving fuel economy by 30 percent and at the same time reducing exhaust emissions. According to Nikkei, a new SkyActiv family of engines is set to debut under the hood of the next-gen Mazda3 sometime in 2018 before making its way into other vehicles. In simple terms, an engine that uses HCCI burns the air/fuel mix using pressure instead of with spark plugs, just like a diesel. At 14:1, Mazda's gasoline engines already have some of the highest compression ratios out there, but a move to HCCI means cranking up the compression to 18:1. While the tech sounds relatively straightforward, using HCCI means dealing with a number of side issues. It's one of those "on paper" ideas that compounds problems when put into practice. Heat, revs, and fuel must all be carefully managed as gasoline doesn't burn the same way as diesel. Mazda is mum on details, but the automaker seems confident that the issues have been sorted. If the new engines do indeed make it to market with HCCI, Mazda will have out-engineered GM, Daimler, and Hyundai, all of which have tried and failed to develop HCCI engines in a cost-effective package. With the market moving towards electrification, it's interesting to see Mazda still focusing so heavily on traditional internal combustion gasoline engines. It's an indication of where they see the market heading for the next few years. Although the automaker has been hesitant to move forward with hybrid and electric powertrains, Nikkei also reports that Mazda will begin mass production of EVs in 2019. Related Video:

Rumored Mazda CX-3 may not be for US

Mazda has used its Kodo design language to make some of the most attractive, affordable cars in the world right now, with the Mazda3, Mazda6 and CX-5 (pictured above), but it still lacks a crossover in the smaller class, which are becoming popular on the world market. It seems like a natural fit then, that the Japanese company would shrink its CUV design even smaller for a CX-3 to fill the gap. However, a rumor suggests that the compact might not make it to these shores.
The Mazda2-based crossover is due later this summer in Japan and is launching in Europe and emerging markets later, according to Automotive News citing a report in Japan's Nikkei newspaper. The little CUV would cost between 1.5 million yen and 2.0 million yen ($14,700-$19,500) in Japan and be available with diesel and petrol engine options. However, the report made no mention of selling it in North America. There is a glimmer of a chance for the CX-3 here. Mazda is upgrading its Mexican factory to 230,000 annual unit capacity by 2016, which gives it the room to add the new vehicle.
While the midsize CUVs are hugely popular in the US, compacts like the Buick Encore are still a small portion of things. If Mazda could time the CX-3's launch right here, it could take advantage of the lack of competition.

Reminder: Come hang out with Autoblog and the 2016 Mazda MX-5 Miata on Tuesday, May 19

Do you love chilidogs, French fries, meeting new friends, and the world's most popular convertible? Do you live in Southeast Michigan? Do you like lists of questions? If you answered "yes" to any but the last of those, we'd like to invite you to a little get-together we're hosting next week. Driving impressions are still under embargo for the US-spec 2016 Mazda MX-5 Miata, but somehow we've conned convinced company PR reps to show the car to you, Joe Public Autoblog Reader. We're enthused about telling you more about the ND Miata, but before we do we'd love to share a Coke and talk about cars. Here's the skinny. A group of Autobloggers will be hanging out at the Athens Coney Island, in Royal Oak, MI, next Tuesday, May 19. We'll have the car on display from 5:00 PM to 8:00 PM, and we'd love to see you. If you're a Miata owner, we'd also love to for you to bring your car along for the party. The more convertibles the better (just be prepared to have your picture taken). Go ahead and set your navi for Athens – 32657 Woodward Ave., Royal Oak, MI 48073 ­– and we'll look forward to seeing you Tuesday. Mazda Geeks unite. Related Video: