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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.

Mazda teases electric car again with peek at interior

Mazda is again touting the new electric vehicle it plans to reveal at the Tokyo Motor Show, this time teasing it from the inside. A 15-second video homes in on features found on the center console, namely, the blocky shifter for the automatic transmission, a large, knurled rotary dial for infotainment control, and a smaller dial we'll assume is for volume control. As for what else we can make out, if we were to guess, we'd say the slick surface to the right of the shifter is a screen. It'll be interesting to see how Mazda designers filled the space between the seats, but we're surprised Mazda went with such a substantial shifter; this being an EV on a new, dedicated platform, designers could have minimized the focus on shifting and opened up a host of other uses.  A brief press release informs us that Mazda's worked to liberate the cabin from structural clutter, though. The brand says the interior is "designed to give occupants a feeling of being 'enveloped in openness,'" and that the "goal [is] to make spending time in the car a comforting experience that allows customers to be themselves." Empty spaces throughout the center console "create a connection between the driver and passenger seat areas," so perhaps what looks like a free-floating console demo section in the video is what the unit will look like in the car. Elsewhere, the EV will feature eco-friendly materials. The EV isn't expected to make it to America, its powertrain designed to satisfy residents of particularly dense urban environments. The running gear should stick close to the drivetrain developed for the e-TPV prototype, meaning a 35.5-kWh battery powering a single electric motor at the front axle producing 138 horsepower and 195 pound-feet of torque, and a single-speed transmission. Range is thought to be around 120 to 150 miles on a charge. The onboard charger can handle 6.6-kW home charging and 50-kW rapid charging. Eventually, a range-extender version with a rotary engine should join the lineup; Mazda said it chose a rotary because even though it's less efficient than competitors' ICE range extenders, it's so much quieter. The debut of what everyone expects to look like a crossover happens on Oct. 23.

Lexus tops Consumer Reports reliability rankings, unseating Mazda

Lexus is back on top of Consumer Reports' annual reliability rankings. Toyota Motor Corp's luxury division dethrones last year's winner, upstart Mazda, to second place, while the Toyota brand itself rounds out the podium in third place. In general, while Asian brands topped the list, Europeans ranked second, and domestics brought up the rear.  Lexus' high marks stem from the Land Cruiser Prado-based GX SUV, which got a perfect score of 100. Mazda's second place finish was the result of strong showings by the Miata, CX-9, CX-5, and CX-30, but dragged down by the Mazda 3's mid-pack score. Likewise, nearly all of Toyota's lineup, from Prius to Avalon, all had very high marks, but the RAV4 and Corolla Hatchback brought down the class average. Like last year, the only American brand to break into the top ten was Buick, which ranked 5th thanks to good scores for the Envision and Encore (though the Enclave ranked sub-par). Eight of the top 10 brands were Japanese, with Infiniti in 4th, and Honda, Subaru, Acura and Nissan following Buick in that order. Mini, in 10th place, was the only European brand in the top 10. The bottom spots went to Jeep, Tesla, and once again Lincoln in dead last. While all Lincolns received poor scores, the Aviator was notable for getting only 3 points out of 100. Similarly, last year's lowest-scoring vehicle was the Ford Explorer, with which the Aviator shares a platform. It wasn't all gloom from the domestics, however. The Chevrolet Trailblazer tied the Lexus GX with a perfect score, but overall Chevy brand ranked 14th, pulled down by the Corvette, Silverado 1500 and Tahoe. The Tahoe tied with the GMC Yukon with the lowest scores this year, just 2 points each. Both the Silverado 2500HD and the nearly identical GMC Sierra 2500HD were among to top scoring American vehicles, along with the Ford Bronco Sport, Mustang Mach E, Ranger and Chrysler 300. Consumer Reports also points out that the oft-said line that electric vehicles are less prone to problems due to fewer moving parts isn't necessarily true. The Audi E-Tron and Tesla Model X each got a score of 5, the lowest of their respective brands, due to more and more technology being crammed into these higher-priced EVs. For a complete list of rankings by company and of individual models, check out the full study at Consumer Reports. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.