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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.

Are Toyota and Lexus planning to use Mazda's straight-six and new platform?

Japan's Best Car magazine has what appears to be a whopper of a rumor. The mag said it scooped Mazda's development of a straight-six engine that Mazda only revealed in March, the carmaker having buried the information in a financial statement. By way of Lexus Enthusiast and according to Google translate, Best Car writes that as it was speaking to a Toyota source on an unrelated matter, the magazine found out that Mazda's work on the straight-six was predicated on the engine's use in Toyota Group vehicles, which includes Lexus. Here's the account of how the engine and Mazda's coming front-engined rear-drive platform, dubbed "Large Architecture," will make their way to Toyota City: The first appearance for the straight-six, predicted to come in at a hair under 3.0 liters, is the Mazda Atenza/Mazda6 successor coming around 2022. The powertrain will get a 48-volt hybrid system for increased fuel economy, and the automaker's said to be considering a plug-in hybrid version. Toyota's first shot at the platform and the straight-six will be whatever fills the slot of the Japanese-market Mark-X sedan. We once had a version of the Mark-X in the U.S. as the Toyota Cressida. In Japan, it's sold as a rear- and all-wheel drive option to the Camry. The Mark-X is slated to end production in December this year — a "sporty four-door coupe" on Mazda's platform and with Mazda's engine eventually taking its place. Lexus has a number of plans for the components from Hiroshima. The next Lexus IS is said to evolve from the current sedan, using a Lexus V6 but migrating to Toyota's TNGA platform. Best Car says the IS after that, perhaps sometime around 2026, will hop onto Mazda's new platform and use the inline-six engine. Before that, the replacement for the Lexus RC in 2022 will sit on the Mazda platform and get that inline-six. What's more, Lexus will introduce a new model to slot between the $64,750 RC and the $92,950 LC employing Mazda's architecture and engine. Best Car says the model will act as a "next car" for RC owners, but we can't tell if the magazine means a two-door or a four-door coupe; the article also says the Lexus model will compete with the Audi A7. Toyota and Mazda partnered up in 2016 on technology sharing. Best Car's take is that, as was done on the Supra, Toyota is picking up all the tech it can from suitable sources so that it can continue to sell models that don't make sense to develop alone.

2019 Mazda Miata officially announced with 181 horsepower

It turns out the rumors and leaks are true. The 2019 Mazda MX-5 Miata will indeed get a slight performance increase. This fall, the car's naturally aspirated 2.0-liter inline-four will make 181 horsepower and 151 pound-feet of torque. That's a 26 horsepower and 3 pound-feet bump over the 2018 model. It may not sound like a lot on paper, but consider the fact that it's a nearly 17 percent increase in power in a car that weighs just 2,332 lbs. When the current ND generation debuted a few years back, the Miata actually took a slight hit to power. It was offset by a sizable weight loss program, but it didn't stop people from making a fuss. These days, it's not often that a newer model actually loses power compared to the outgoing car. The new car now makes roughly the same power as the old turbocharged Mazdaspeed MX-5 from 2004. Peak power for the 2019 model comes at 7,000 rpm while peak torque arrives at 4,000 rpm. That's 1,000 more and 600 fewer revs respectively. The Miata's redline is now 7,500 rpm, up from 6,800. It should make the car feel more lively through the rev range and should drop the car's 0-60 mph time back under 7 seconds. The 2019 model only weighs 7-pounds more than the outgoing model, so it's essentially a non-issue. In order to get the extra juice, Mazda engineers did some significant work to the engine's internals. Piston mass has been reduced 27 grams while the connecting rods are down 41 grams. The exhaust system and inner exhaust manifold have been modified to reduce pumping losses by 30 percent. The intake and fuel injectors have been changed, too. A new dual-mass flywheel replaces the single-mass unit. This should help better manage engine vibrations and responsiveness. Lastly, the final drive ratio has been increased from 3.454 to 3.583. Other gear ratios remain unchanged. There are other minor but welcome changes for 2019. The steering wheel now telescopes, a boon for drivers with long legs. The doors are easier to open and feature revised door stops. The cupholders and seat levers have both been updated. Finally, there are new 17-inch wheels and a new brown canvas soft top. How all these changes will affect the car remain to be seen. While many people have been clamoring for more power, some of us here at Autoblog feel the Miata may lose some of its current character with such a significant shift in power and torque. Either way, we're as excited as ever to get behind the wheel. Related Video: