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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.

Mazda reportedly to be fully electric and hybrid by 2030s

TOKYO - Mazda plans to make all of its vehicles electric-based, including gasoline hybrids, by the early 2030s, Japanese media reported on Friday, as more automakers shift strategies to meet tightening global emission regulations. The Japanese automaker plans to use electric motors in all of its models by that time, Kyodo News reported, without citing sources. A Mazda spokeswoman declined to comment on the report. At the moment, Mazda's lineup does not include any all-battery electric vehicles. It does offer a hybrid version of the Mazda3, but it's only available in Japan. The company has also experimented with a range-extended electric Mazda2, which used a tiny rotary engine to produce electricity. The move is consistent with the company's Sustainable Zoom-Zoom 2030 plan, which lays out the launch of various green powertrains. Among them are electrified models coming out in 2019. That same year will include the launch of the company's new SkyActiv-X engine, a compression ignition gasoline engine, which promises fuel efficiency improvement of 20- to 30 percent over comparable spark-ignition gas engines. This engine could hypothetically be combined with hybrid technology for even greater gains in efficiency, or even performance if the company so chooses. Mazda's recent partnership with Toyota also means Mazda could be able to quickly develop hybrids and electrics using Toyota's existing technology. This news that Mazda will begin primarily focusing on electric powertrains does seem contrary to Mazda CEO Masamichi Kogai's statement that its gasoline, diesel and electric vehicle technologies would "co-exist" in the future. Mazda on Thursday also launched a new CX-8 three-row crossover for the Japanese market, which is currently only available with a diesel engine. The company also plans to finally introduce a diesel engine to the United States in the CX-5 crossover. Assuming that Mazda's move to fully electrified vehicles is true, it will join a couple of other automakers planning to do the same. Volvo Car Group in July said that all of its new models from 2019 would feature some amount of electrification, and Jaguar-Land Rover will follow suit starting in 2020. Reporting by Naomi Tajitsu. Editing by Sherry Jacob-Phillips. Additional words from Joel Stocksdale.Related Video: Image Credit: Toru Hanai / Reuters Green Mazda Electric Future Vehicles Hybrid mazda hybrid mazda electric car

2014 Mazda3 2.0L Hatchback officially rated at 40 mpg highway

The Environmental Protection Agency has spoken, and these are the miles per gallon numbers it has officially bestowed on the 2014 five-door Mazda3 hatchback with the SkyActiv-G 2.0-liter engine: 29 city, 40 highway, 33 combined when fitted with the six-speed manual; 30 city, 40 highway and 33 combined when equipped with the six-speed automatic.
Those numbers exactly match the fuel economy targets that Mazda had set for the car when optioned with the 2.0-liter Skyactiv-G with 155 horsepower and 150 pound-feet of torque. For comparison to other cars in the segment, the EPA numbers for the 2013 Honda Civic sedan are 28 city, 39 highway, 32 combined when its 140-hp, 1.8-liter four-cylinder is paired with the five-speed automatic. The Hyundai Elantra GT gets 27 city, 37 highway and 30 combined according to the EPA when its 148-hp, 1.8-liter four-cylinder is paired with either a six-speed manual or six-speed automatic transmission. The numbers for the 2014 Ford Focus aren't out yet.