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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.

25th Anniversary Edition Mazda MX-5 Miata sells out in 10 minutes

Looking to buy one of the limited-edition 25th Anniversary Mazda MX-5 Miata roadsters? Well, you're too late. According to Mazda, all 100 examples of the darling two-seater have sold out - and it only took 10 minutes.
On Tuesday, Mazda opened its pre-order site for the limited-run Miata, and had intended to keep the site running until May 31, or until 250 customers were registered, whichever came first. Just 10 minutes later, 250 people had signed up. Now, Mazda will contact those folks, and the first 100 that are verified will be given the opportunity to pre-order the unique MX-5. "Upon verification of purchase intent and transmission selection, the customer's information will then be forwarded to the dealership of their choosing to finalize the transaction," Mazda said in a press release.
The 2015 MX-5 Miata 25th Anniversary Edition models will arrive at dealers this summer, retailing for $32,205 with the six-speed manual, or $32,655 for those desiring the automatic transmission. Based on the PRHT (Power Retractable Hard Top) model, the limited-edition Miata adds Bilstein shocks, a Soul Red metallic paint job (the same found on the gorgeous Mazda6) with a contrasting black roof, gunmetal wheels and an off-white leather interior. Special badging will be found inside the car, and buyers will also be treated to a custom-crafted Tourneau watch and a display winder box.

Mazda Hazumi concept gets punchy, comes out of its corner early

The official images Mazda Hazumi concept, which previews the next-generation Mazda2, have leaked out from Chinese website Auto.sohu.com ahead of its debut at the 2014 Geneva Motor Show.
The subcompact, four-door hatchback shows off Mazda's Kodo design language in its smallest size yet. Hazumi means "bound" or "spring up" in Japanese, and it is meant to look like it is packed with energy. It is a very attractive little concept and hopefully points to a more stylish face for the next-generation Mazda2.
Mazda has not unveiled the full details about the concept yet, but in a previous release, it said for the car is using a 1.5-liter Skyactiv-D diesel engine. While Mazda has not officially said that the Hazumi shows the next Mazda2, it did say in its earlier release that it "points the way to the future" for the brand's small cars. Reading between the lines isn't too difficult, then.