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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.

Mazda3 officially unveiled

Mazda has officially pulled the sheets off of its 2014 Mazda3. The all-new compact boasts a wheelbase that's a full 2.4 inches longer than the outgoing model, yet the hatchback is a nearly two inches shorter from stem to stern. The machine is also lower and wider than before, which should give occupants plenty of space indoors. The driver gets treated to a new human-machine interface that features a new Active Driving Display for information like vehicle speed and navigation instructions conveniently in the line of sight. Likewise, the vehicle's infotainment system has received a complete rebuild.
Outside, the new Mazda3 makes full use of the company's KODO design language, and to our eyes, the result is one of the most attractive entries in the segment. Jump under the hood, and buyers can expect to find a Skyactiv-G 2.0-liter gasoline engine with 155 horsepower and 150 pound-feet of torque, though no fuel economy estimates are available. For those looking for a bit more thrust, Mazda also offers a 2.5-liter Skyactiv-G gasoline mill with 184 hp and 185 lb-ft of torque. So far there's no word on the diesel engine available to our friends in Europe.
Both engines can be mated to either a six-speed manual or a six-speed automatic and feature the automaker's i-ELOOP brake energy regeneration systems. The recaptured energy is stored in a capacitor and used to power the vehicle's various electrical systems.

Mazda2 with extended-range hybrid rotary tech shown

Every story dealing with a new rotary engine from Mazda lands in a different place on the matrix of possibilities between "Coming soon!" and "Never gonna happen!" In 2011 it was speculated that the rotary engineering program would be shut down with the demise of the RX-8, in 2012 the program was still alive and taking lessons from the SkyActiv engines, in August 2013 a Mazda insider said a rotary engine called 16X would be here in two years, in November the CEO said the only way we'd ever get a new rotary is if Mazda could sell 100,000 of them per year. Meaning that, for the moment, you can forget about it.
And yet, last month Mazda was putting journalists in a Mazda2 RE Range Extender, an electric car using a 0.33-liter rotary to power its lithium-ion batteries when the charge runs down. With a 75-kilowatt, 100-horsepower electric motor turning the front wheels, the Wankel generator and its 2.6-gallon gas tank living under the trunk double the range of the electric-only Mazda2 to 250 miles.
There's been talk of using a rotary to assist an alt-fuel vehicle for at least seven years, with Mazda pairing an electric motor with a rotary that ran on gas and hydrogen in a Mazda5 in 2007. Since then, almost all of those stories debating its return or demise also spoke of the oddball motor's advantages, such as compact size and ability to run on various fuels, as an aid in an unconventional powertrain.