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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.

Recharge Wrap-up: Mazda, Toyota earn environmental awards

Electric mobility nonprofit Drive Oregon has launched a campaign to invite the electric car industry to perform testing in the state. The campaign tells companies to, "Test Drive the Future in the Living Lab," citing Oregon's density of EV owners and charging infrastructure, varied terrain and climate, funding opportunities, and the state's technological reputation as the "Silicon Forest." Plus, as Drive Oregon Executive Director Jeff Allen, points out, "if you really screw things up here, it doesn't make as much noise as it would in California." Already, Jaguar Land Rover has announced plans for an Innovation Incubator in Oregon. Read more at Green Car Reports. Mazda's new paint system has won the Prime Minister's Award in the category of Manufacturing and Production Process at the 6th Monodzukuri Nippon Grand Award ceremony. Mazda's Aqua-tech paint system significantly reduces emissions of volatile organic compounds (VOCs) and CO2. The Aqua-tech system uses a water-based color basecoat and a urethane clear coat to reduce VOC emissions by 57 percent. It consolidates the painting process and reduces energy in paint-booth air-conditioning and flash-off processes to reduce energy consumption. It also allows Mazda to create such colors as Soul Red, which looks quite nice on the MX-5 Miata. Read more at Green Car Congress, and learn all about the Aqua-tech paint process from Mazda. The Toyota Mirai has received a 2015 Environmental Award from Austrian automobile club ARBO. The hydrogen fuel cell car took the prize in the category of Current Innovative Environmental Technologies. "At Toyota, we believe that various technologies will co-exist, ranging from EVs to hybrids to the most innovative of all, the fuel cell car," says Gerald Killmann, Vice President R&D of Toyota Motor Europe, in a comment thanking ARBO. "Mirai is a core component of Toyota's vision for a sustainable mobility society, one that allows us all to move freely in comfort and safety in an environmentally friendly, sustainable manner." Read more in the press release below. Vienna, Austria- November 5th - The Austrian automobile club ARBO* (Auto-Motor und Radfahrerverbund Osterreiche) has awarded the Toyota Mirai with the "2015 Environmental Award". This Award was received during a gala ceremony held yesterday in Vienna, where the Toyota Mirai was awarded in the category of "Current Innovative Environmental Technologies" . The jury consisted of ARBO automotive experts.

Why Mazda’s Skyactiv-X compression-ignition engine is a smart hedge bet

Mazda has cracked the code on a compression-ignition engine, called Skyactiv-X (which utilizes SCCI, or Spark Controlled Compression Ignition). That's a neat engineering accomplishment, sure, but why is the tiny company investing big dollars in fancy tech that's frustrated the much larger companies who've investigated it? In this case, Mazda is peering into a crystal ball to consider how best to flow with a few troubling tides. One is the premature handwringing about the death of the internal combustion engine, another is Europe's swing away from diesel engines. Skyactiv-X seems, at this juncture, a hedge bet against both aspects. EV infrastructure lags massively behind our petroleum infrastructure — no shock there. Mazda claims the tech will net 20-30 percent gains in fuel efficiency over its current gasoline engines and about matching its diesel engine. And that's without any onboard hybrid tech, so that staves off the inevitable necessity to fully adopt electrification for a while — this is assuming that, at some point, it won't be practical to sell a non-hybrid or non-EV. At what date that happens is open to debate, but as I said above, technology like this kicks that decision point down the road a bit. Mazda is here translating research dollars into time, allowing its engine factories a few more years of probably profitable production of internal-combustion engines before retooling, and before somebody needs to pour a massive amount of money into a broad EV charging infrastructure to replace gas stations. None of this is happening fast enough for a wholesale transition to EVs anytime soon. So, that's one bet hedged. The next is Europe's declining interest in diesel engines for mainly health reasons. Just about a week ago, The New York Times posted an excellent primer on this issue, which is somewhat controversial in Europe. Germany's auto industry, a huge portion of its economy, is heavily invested in diesel tech and seriously opposed to proposals in Britain and France to eliminate the technology, which creates unhealthy diesel particulate emissions. The German industry is hoping Band-Aids like pollution-reducing measures will help them, but after a massive and widespread emission cheating scandal, its credibility is at a nadir. It seems like consumers have sensed which way the wind is blowing, and it has hurt sales. The NYT reports that diesel sales in Germany alone — remember, bastion and originator of diesel technology — are down 13 percent.