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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.

Infiniti QX60 AWD vs. Mazda CX-9 Signature

In certain ZIP codes around Dallas, Chevy's Suburban remains the Official SUV of Texas, but Infiniti's QX60 could be the Official Crossover. The Pathfinder-based three-row is everywhere. And while its popularity is based on transporting kids and their stuff, the QX60 is a more urban Suburban. Mazda's CX-9 is not as ubiquitous as the QX60 in McMansion driveways, but it has been making inroads into the near-luxury segment with its near-luxury spec. The CX-9's second generation has obviously upscale intent, in the sheetmetal and throughout the top-line Signature interior. And the prices of these two cars are surprisingly close. INFINITI QX60 AWD: The sheetmetal differentiating Infiniti's QX60 from its volume-oriented Nissan donor is attractive. The changes are subtle, and in profile the Pathfinder and Infiniti are almost identical, but the eye is drawn to the differences in the grille and D-pillar. The Infiniti has a luxury vibe with a more athletic stance. The QX60's interior surfaces seem upscale, but if you want wood it will cost you. In "building our own" and opting for graphite leather with maple trim, the wood requires another $12,000(!) of mandatory packages, including Infiniti's Premium and Premium Plus packages ($1,800 and $2,900, respectively) and $7,300 of Deluxe Tech. So, wood? We wouldn't. But if you do, know the QX60 won't match the larger QX80 in presence or passion, but it is certainly something beyond a rebadged Pathfinder. For you and your passengers, there is 156 cubic feet of interior room; with the second and third rows folded, you can accommodate 76 cubic feet of cargo. Like in most crossovers, that third row is best used by young kids, but taking six adults to lunch won't require too much gymnastics – or chiropractics. On the road, the QX60 is known more for comfort than composure; this isn't an old Buick, but neither is it a BMW. Nissan's 3.5 liter V6 produces generous power (295 horsepower and 270 pound-feet of torque), but it's transmitted to either the front wheels or all wheels via a CVT (continuously variable transmission). Nissan has tried to mitigate the quirkiness, but it's a CVT all the same. At a well-equipped base of $44,000, we like the QX60. But start adding options, and you can approach $60,000, which is real money even in the better ZIP codes. MAZDA CX-9 SIGNATURE: This, ladies and gentlemen, is dramatic. Mazda has absolutely nailed it. Using Mazda's KODO design language on a large platform could have gone wrong.

Cedar Rocket is the fastest all-electric log car in the world

An electric turbine manufacturer, a mechanic, and a log house builder walk into a bar. No, wait. The three are standing around at Barrett-Jackson a few years ago, talking about the world. What's the eventual punchline? An all-electric vehicle mash-up of a Mazda RX-8 and a giant piece of wood. One that was just awarded a Guinness World Record for "fastest motorized log." "Truly, what else would you think of?" - Bryan Reid, Sr. Bryan Reid, Sr., star of the reality show Timber Kings, is the log house builder in the set-up above, and he's now the proud owner of Cedar Rocket. He told AutoblogGreen that a log-based EV is the natural result of the three guys chatting. "Truly, what else would you think of?" he said. "I mean, really? There has to be something to come out of it other than girls. It was crazy, but it's a good story and nobody gets hurt. It's hard to make the news when everything's positive." Idea in hand, Reid and his friend set off to actually build the car. Gerald Overton, the mechanic, turned the Mazda into a welcoming recipient, working on the disc brakes, axles, frame, differential, and suspension. While the presence of a television producer kept things moving, Reid said that it still took almost two years. "It started out, not as a joke, but as something very light," he said. "You put a log on a couple of axles and 'ha ha.' It ended up taking many thousands of hours. We don't do anything halfway." In the end, Reid and the team took the Cedar Rocket to the Wild Horse Pass Motorsports Park in Chandler, Arizona and managed two runs of 55 miles per hour within an hour (that's what Guinness required to hand out the official record). The Rocket is incredibly stable – heavy batteries help there – and Reid pointed out that because the EV uses electric turbines, it's not a quarter-mile car. "It's more like a salt-flat car," he said, because the "turbines that take a while to spin up." Given the right conditions, Reid said the team thinks the Cedar Rocket could go 120-130 mph. "It's crazy because it's different." But the point of this car isn't to just go fast. The builders will bring the car to Barrett-Jackson and auction it off next year, but before that it will make the rounds at places like SEMA and a number of unexpected events, like golf shows. The point is to get attention and raise money and awareness for veterans groups. "I believe it's for the best cause in North America," he said.