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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:

Mazda Kai concept hints at a more muscular, refined Mazda3

Mazda is packing some serious punch for the Tokyo Motor Show, unveiling a stylish hatchback it's calling the Kai Concept to go along with the earlier reveal of the show-stopping Vision Coupe. The compact five-door concept heralds a new generation of cars for the Japanese automaker, which is best known for making sporty, smallish and well-designed vehicles — such as the Mazda3, from which this concept derives its design direction. This version smooths over most of the Mazda3's sharp body creases in favor of smooth, undulating body panels that dramatically reflect light and reflect Mazda's KODO design language. It also gets more narrow, aggressive-looking headlights and a unique overhead profile, with two panes of glass that continue from the windshield and are intersected by a solid-color center, like a U-shaped moonroof. The Kai is powered by a next-generation Skyactiv-X combustion engine, which uses Mazda's proprietary compression ignition system to give the gas-powered engine the fuel efficiency, torque and initial acceleration response of a diesel powertrain. Which is encouraging, considering the Mazda3 already delivers impressive fuel economy. Inside, the concept hints at more refinement, with streamlined chrome accents popping from the black dash and interior panels. It all rests on Mazda's Skyactiv Vehicle Architecture that reflects human-centered design philosophy in everything from redesigned seats to maintain the spine's natural "S" curvature, to NVH tweaks to encourage a quieter, more comfortable ride. Mazda has said it plans to put this concept into production, but there's no word yet on when exactly that will be.Related Video:

Mazda boss says no to new-generation Mazda3 hot hatch

Mazda offered a hot, turbocharged version of the Mazda3 model during the car's first two generations, badging it either the MPS or the Mazdaspeed 3 depending on the market. The third generation car didn't get a hot-hatch variant, and now Mazda is saying there won't be one for the freshly revealed fourth-gen car, either. Mazda's new global boss, Akira Marumoto, told Australian motor journalists at the Los Angeles show that there won't be an MPS in the cards. As Drive quotes Marumoto: "Mazda is a small player, and if [you are asking whether] that segment has a high particular priority for Mazda, my answer would be no. Therefore we not planning for MPS in the future." Marumoto stated that Mazda would rather establish itself as a genuine premium carmaker comparable to its European rivals, stressing that this would be achievable through quality, comfort and refinement improvements in the existing lineup rather than expanding into other segments. As well as nixing the Mazda3 MPS, Marumoto also said that despite repeated queries, the function of the 2015 Tokyo Motor Show car RX Vision was to preview the evolution of the Kodo design language and not to herald the arrival of a new rotary sportscar. So, it's time to cue the Mazda Kills Rotary Sports Car Again headlines. Marumoto also told journalists that there won't be an EV sports car or a completely driverless car from Mazda either: He said he prefers the smell of gasoline to full electric power, and that Mazda will never build a car without a steering wheel. For Mazda, autonomous capabilities would serve to bring the car to a safe halt in the case of an incapacitated driver, instead of doing the driving. However — and there is a strong "however" — Mazda did tell us that the turbocharged 2.5-liter engine does fit into the new 3. Mazda representatives said that the header on the naturally aspirated version is big enough as it is, making it easy to shoehorn in the 250-horsepower turbo version without issue. They also said that the company is closely monitoring buyer demand, which originally led to the turbo being available on the Mazda6 and CX-5, along with justifying the introduction of all-wheel-drive in the new Mazda3. So: if there is a case for it, the turbo might come — just don't call it a Mazdaspeed 3, or view it as an overt hot hatch. But the shoe fits.