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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.

Mazda is going to start restoring first-generation Miatas

Many of the world's premium car companies have in-house restoration shops that help provide parts and complete restorations to owners of classic models from the marques. Ferrari has one, Lamborghini has one, Mercedes-Benz has one. Now Mazda will have one, and it will be focused on the Mazda Miata, also known as the MX-5 in Europe, and the Roadster in Japan. And although some might think the Miata is too new for restoration, remember that it was launched in 1989, so it's closing in on 30 years old. Japanese Nostalgic Car broke the news of the restoration service, which will start accepting applications for restoration service this year, with the first work being done at the start of 2018. Mazda explains on its site (Google Translate is recommended) that owners of first-generation Miatas were telling the company they really wanted to restore and maintain their little convertibles for as long as they could, which is what prompted the company to pursue the service. Before offering it to customers, the company did a trial restoration of an early Miata (Roadster in Japan). Once Mazda starts restorations, it said the services will be tailored to the individual cars. In addition to restoration services, Mazda announced it will also start selling reproduction parts for first-generation Miatas. On the list of parts are new tops, Nardi wood steering wheels and shift knobs, and even the original-style Bridgestone tires. The company also said that it will add more parts later depending on which ones are most in demand. Unfortunately, according to Japanese Nostalgic Car, the service will only be available to owners in Japan for the time being. The service will also only be for first-generation models. But perhaps if the program is successful, and there's demand for other regions and generations, Mazda might expand the service. Related Video: Featured Gallery Mazda Roadster restoration View 10 Photos News Source: Japanese Nostalgic Car, MazdaImage Credit: Mazda Mazda Maintenance Convertible Performance Classics

Mazda Miata celebrates 25 years of rocking our worlds

For its birthday it hasn't been profiled on 60 Minutes or been to Jay Leno's Garage, doesn't go on a retrospective tour of vintage racetracks or get a special Spyder Zagato edition. That doesn't mean we think any less of the Mazda MX-5 Miata, the roadster with a simplicity that was as enjoyable as it was barely believable when it arrived in 1989. A quarter of a century and three generations later, the Miata remains the go-to roadster when you want easy, balanced and economical thrills.
It grew from a 116-horsepower speedster with a five-speed manual transmission and a curb weight of 2,116 pounds, to a 167-hp go-kart with a five-speed manual coming in at 2,480 pounds (in Sport guise). Along the way it's picked up hundreds of awards, including 14 nods on Car and Driver's "10Best" list, its most recent eight-year streak coming to an end last year, the Guinness Book of World Records title as "Best-Selling Two-Seater Sports Car" and innumerable trophies as weekend racer extraordinaire.
We'll see the fourth generation at next year's Chicago Auto Show, and we're certain to hear more about its 25-year milestone this year. Until that happens, enjoy the images above and the gallery and press release below.