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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.

Driving the Chevy Corvette Z06 and Porsche 911 Carrera T | Autoblog Podcast #551

On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Green Editor John Snyder and Associate Editor Joel Stocksdale. We talk about the wide variety of the cars we've been driving, starting with the Chevrolet Corvette Z06 and Porsche 911 Carrera T. Then we discuss the more powerful 2019 Mazda MX-5 Miata, our long-term Honda Ridgeline and our week with the Hyundai Ioniq PHEV. Finally with Pebble Beach on our minds, we preview the Concours d'Elegance.Autoblog Podcast #551 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 2019 Chevrolet Corvette Z06 2018 Porsche 911 Carrera T 2019 Mazda Miata 2018 Honda Ridgeline 2018 Hyundai Ionic Plug-In Hybrid Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video:

Mazda planning not one but two new crossovers for U.S.

Mazda has already announced plans to unveil a brand new crossover at the Geneva Motor Show, but it turns out there's another one in the pipeline set to satiate the appetites of a crossover-mad U.S. market. Speaking at the Chicago Auto Show, Mazda North America CEO Masahiro Moro told reporters the brand has another model planned for production at the $1.6 billion plant under construction with joint-venture partner Toyota in Huntsville, Ala. It'll be "a new crossover SUV which is exclusively designed for the North American market," Automotive News quoted Moro as saying. While it'll be a different product from the one debuting next month in Geneva, the two vehicles will share some architecture. The company is reportedly still finalizing the concept for it. Currently, Mazda sells three crossovers in the U.S.: the subcompact CX-3, the compact CX-5 and the larger CX-9. Together, the three vehicles, which constitute half of the tiny automaker's vehicle lineup, posted sales of 195,778 for 2018, up 15.8 percent from 2017. They accounted for nearly two-thirds of the brand's total vehicle sales of 300,325. Production is expected to start at the new Alabama plant in mid-2021, Moro said, and add capacity for 150,000 units of crossovers. The plant is expected to employ up to 4,000 workers with a total capacity of 300,000 vehicles a year. Toyota plans to build the Corolla there alongside Mazda's crossovers. Mazda last week released the teaser pic shown above of its forthcoming new crossover headed for Geneva. It could be the next and slightly larger version of the CX-3, which will use the Skyactiv Vehicle Architecture that also supports the new Mazda3. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.