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Mazda patent shows rotary placement in complex AWD hybrid layout

If we were playing alt-powertrain Bingo, a recent Mazda patent application filed in Japan would be one or two letters from victory. What's exciting about the patent, discovered by Japanese outlet T's Media via Motor Trend, is that while it makes a case for an internal combustion engine of any configuration, one of the drawings showing a rotary engine. The wild bit is that the whole powertrain comprises the ICE, a transaxle, two tiny in-wheel electric motors turning the front wheels, a third electric motor in the driveline, a capacitor, a lithium-ion battery, and three inverters. Motor Trend parsed the mechanics, and the way it reads, Doc Brown couldn't have done a better job. The rotary engine at the front turns the rear wheels, but not directly. Instead of a flywheel on back of the engine, the drawing shows a 25-kW electric motor and an inverter, then a driveshaft running to the transaxle. Along the axis of the transmission tunnel in a normal car, between the inverter and the transaxle, lies a 3.5-kWh battery running at 48 volts. MT writes that the electric motor can add its output to the ICE output to drive the rear wheels, or the e-motor can turn the rear axle on its own. Up front, two inverters and a double-layer capacitor join the ICE in the engine bay. The capacitor and tiny hub motors in the front wheels run at 120 volts, a higher voltage than the rest of the electrical system, so that the small in-wheel motors can generate the same torque as a larger motor running at a lower voltage. The AWD system acts on-demand. Given the signal, the capacitors discharge their energy to the wheel motors, and recover energy from braking. When the capacitors are at full charge, they send excess regen energy to the lithium-ion battery; conversely, the battery can recharge the capacitors when they're low and the front hub motors need power. The patent explains that the ICE works with the rear e-motor to drive the rear wheels at low speeds, the front motors called on to "generate an output only when a large output is required in the high vehicle speed range." The rather complicated system is focused on providing the benefits of a hybrid system and all-wheel drive, but at lower weight than one would expect. A rotary serves due to its compactness, but one of the drawings shows an engine with a V layout. Hub motors get dinged for adding unsprung weight, hence the small motors here.

Super-rare Mazda MX-5 Miata coupe pops up for sale

It's somehow fascinating that one of the most interesting developments of Mazda's MX-5 Miata roadster is the one that isn't a roadster at all. Unlike the NC and ND generations with retractable power hardtops, the second-generation NB Miata got a special coupe version with a fixed roof, done in the style of the first-generation coupe concept. We're talking very limited production numbers: just 179 of these NB coupes were made, and they were all Japanese-market models, so it's not often that one comes up for sale. Except now. Itself even more of a limited-edition car, this sportier Type S version residing in Hong Kong and advertised on Pistonheads is one of just 63 made. It's right-hand-drive, as both its Japanese market origins and Hong Kong regulations dictate, and out of the available engine variations it comes with the 1840cc unit and a six-speed manual gearbox. What's more, despite its low 30,000 miles, the 2004 fixed-roof Miata is said to be fully overhauled and restored to as-new condition. We can't imagine those coupe-specific parts such as glass and trim are easy to source, so with these extremely rare cars it's probably best to go with the best condition example you can find, if you can find one to begin with. Rust hits all old Miatas at some point. With that backdrop, the GBP30,000 ($38,700) asking price doesn't seem all that unreasonable. With the Miata's enormous enthusiast base, there are now aftermarket solutions that imitate the flowing lines of the rare factory coupe, but they do lack the strengthening that Mazda's specialty skunkworks shop put in these — and the body-stiffening roof adds a mere 22 pounds to the car's dainty overall weight. For some lucky Miata hobbyist, this particular red coupe might be the crown jewel of their roadster collection. 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.