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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.

Race-inspired Mazda 3, CX-5, and Miata look great with white letter tires

At the 2020 Tokyo Auto Salon, a customization show that is kind of like SEMA but definitely not the same, manufacturers promote what is available and explore what's possible. Mazda brought a variety of vehicles to the show, but none more intriguing than the Mazda Motorsports Miata, Mazda3, and CX-5 concepts. The trio has race-inspired graphics, as well as a slew of visual and mechanical changes. The three vehicles have a core pack of changes, then each one has its own signature pieces to create some differentiation. The roadster, hatchback, and crossover have height-adjustable suspensions, upgraded brakes, MazdaSpeed tow hooks, circular number body decals, new wheel nuts, Alcantara steering wheels and shift knobs, special heel plates, MazdaSpeed six-point harnesses, and MazdaSpeed sport seats. The Miata and 3 have Fujitsubo stainless mufflers, while the CX-5 has a slightly different exhaust. The Roadster appropriately has the most involved individual upgrades. It has a body kit with front, side, and rear alterations, and it sits on RAYS ZE40 17x7.5J wheels wrapped in Potenza RE-71R 215 / 45R17 rubber with beautiful white lettering. It also has a Cusco roll bar, a MazdaSpeed rear spoiler, a MazdaSpeed strut bar, and a MazdaSpeed lower arm bar. Inside, the door trim, decoration panel, shift boot, center console lid, and parking brake boot are draped in Alcantara. An aluminum pedal set is adds a final touch of polish. On the Mazda 3 hatchback, the aero kit is specifically noted to be "Signature Style." Mazda also upgraded the strut bar and lower arm bar, and threw on Rays ZE40 18x7.5J wheels in Potenza RE-71R 215 / 45R18 tires, also with white lettering. Black mirror caps, a scuff plate, and a sports pedal set complete the concept. On the CX-5, Mazda made it sportier but also added some crossover-focused features, too.. It has Mazda-styled aero, an Auto Exe sports muffler Rays G25EDGE F1 20x8.5J wheels, Bridgestone ALENZA001 255 / 45R20 tires with white lettering, and a new wheel nut set. It also has a scuff plate, premium floor mats, a premium luggage mat, and sports pedals. For now, these are only concepts, with no word as to whether anything similar could hit Japanese markets, let alone U.S. shores. A Mazda engineer previously said a MazdaSpeed3 wouldn't happen, but the company is reportedly considering a 3 with a 250-horsepower 2.5-liter four-cylinder engine.  Related Video: This content is hosted by a third party.

Tesla Model Y and Cadillac CT5 | Autoblog Podcast #573

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Consumer Editor Jeremy Korzeniewski and Associate Editor Joel Stocksdale. They catch up on the Tesla Model Y, as well as the Cadillac CT5 and the brand's new naming structure. Afterward they talk about our driving the 2019 Mazda3, 2019 Volkswagen Golf GTI and 2019 Ford Ranger. Finally, the three editors take a lap around eBay looking for the best ways to spend $15,000 on a car. Autoblog Podcast #573 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Tesla Model Y unveiled Cadillac CT5 and Cadillac's new badging strategy Cars we're driving: 2019 Mazda3 2019 VW Golf GTI 2019 Ford Ranger How we'd spend $15,000 on eBay Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: