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Mazda patents show rotary engine for range-extended EV

Two years ago, Mazda introduced a fascinating range-extended electric car called the Mazda2 RE Range-Extender. It took an electric Mazda2, and dropped in an itty-bitty 330cc rotary engine. It wasn't the rotary-powered sports car we had hoped for, but it seemed like a unique way to keep the quirky engine alive and kicking. But not long after the car's reveal, it seemed to disappear. Now the basic idea has resurfaced with a few modern updates in a couple of US patents. The first patent is pretty straightforward and describes a range-extended EV similar to the BMW i3. At the front is an electric motor driving the front wheels. At the back is an internal combustion engine that powers an electric generator. In the middle is a lithium-ion battery for storing and delivering electricity. It's the same set-up as that Mazda2. The second patent is for an engine start-and-stop system, but specifically for rotary engines. The system is designed to shut off a rotary engine when not needed, much as modern piston engines do. It also stops the rotor in a position that closes the intake port to ensure no fuel or exhaust emissions slip out through the intake tract. This is necessary since there are no valves in a rotary, and air and exhaust come through ports that are "opened" and "closed" by the rotor itself. The patent also describes the possibility of firing a spark plug after the fuel has been cut to eliminate any leftover fuel emissions. This system would theoretically improve a rotary engine's fuel economy and emissions significantly, which would be a boon as those are two of the rotary's major weaknesses. The rotary-engine patent also includes the same range-extended powertrain drawing as the first patent. It's there as a description of a possible application. And in such an application, where the rotary wouldn't have to run all the time, the system could take advantage of the rotary's inherent strengths. Weight can be kept low thanks to the engine's small dimensions, which should help in keeping the car sprightly and efficient. Rotaries are renowned for smoothness, too, so it shouldn't need too much refining and sound deadening, the latter of which adds more weight. The small size would also help with packaging, leaving more space for people, cargo, or possibly batteries. And since it has been patented, the company may be looking to bring the system to market.

Britain's BBR already promising 2016 Mazda MX-5 Miata with 200+ horsepower

The 2016 Mazda MX-5 Miata is one of Autoblog's most anticipated cars to drive this year, and with good reason. Thanks to svelte, angular styling, the promise of less weight, the possibility of more power and all at a fairly affordable price, it represents pure, automotive enjoyment. Mazda is still not saying exactly how much power the new Miata's 2.0-liter Skyactiv four-cylinder engine will make, but that isn't keeping British tuner BBR from already working out how to squeeze even more ponies from the mill – potentially as much as 200 horsepower with natural aspiration. The company bought a Mazda3 for access to its 2.0-liter Skyactiv and went to work on it. "Our objective with the all-new MX-5 is to achieve the same 200 bhp output that we can easily enjoy with simple bolt-on components on the current 2.0-litre NC model, before building on further power upgrades using forced induction," said Neil McKay of BBR in the company's release. The 3's version of the engine is rated at 155 hp and 150 pound-feet of torque but is expected to be tuned for additional grunt for the droptop. Still, it gives BBR something to experiment with before the real thing is available. The tuner also got the opportunity to take a look at a pre-production 2016 Miata and is already developing "subtle bodywork alterations" for the upcoming convertible. You can get a taste for the company's plans with the rendering above. It sports tinted lights, a front lip spoiler, lower side sills and a tiny rear spoiler. Scroll down to read more about BBR's plans in the official announcement. BBR UNVEILS STUNNING 200 BHP ALL-NEW MAZDA MX-5 CONCEPT Despite deliveries not scheduled to begin until July, legendary Mazda performance tuner BBR is making great progress with both its visual concept and powertrain development for the all-new MX-5. "A program of detailed performance enhancements has already commenced at our Brackley base," says BBR's Neil Mckay, "thanks to our investment in a 2.0-litre Skyactiv powered Mazda 3. Our objective with the all-new MX-5 is to achieve the same 200 bhp output that we can easily enjoy with simple bolt-on components on the current 2.0-litre NC model, before building on further power upgrades using forced induction." Having viewed a pre-production version of the car BBR is also working hard on visual enhancements to add more presence to the svelte lines of the all-new MX-5.

Alfa Romeo takes Spider in-house, Mazda-Fiat roadster partnership not dead

It's officially off. Following a report in March of this year that the marriage of Mazda and Alfa Romeo to produce a MX-5-based Spider was in trouble, the Italians have confirmed that it will take development in-house. "As far as the Spider goes, the final version is of course no longer the two-seater FCA co-developed with Mazda but a derivative of Project Giorgio," Maserati and Alfa Romeo brand boss Harald Wester told Car. For those not in the know, Project Giorgio is Alfa's codename for the rear-drive platform that will underpin the next-generation Spider, not to mention the replacement for the 159 sedan and a few other products. All is not lost for the Japanese-Italian partnership, though. "The Far East import will probably find a new home with Fiat-Abarth," Wester told Car. Yes, you read that correctly, Mazda is still working with FCA, and the result will eventually end up with Abarth's scorpion badge. If anything, we're more excited over this news than the idea of an Alfa MX-5. But we want to know what you think – would you rather Alfa build a new Spider on the Miata's bones, or does an MX-5 Abarth sound like more fun? Have your say in Comments.