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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.

Sunday Drive: Tracking Tokyo's top performers

The big news of the week mostly came from Tokyo. All of Japan's biggest automakers made waves at the Motor Show, but the winner of the event has to be Mazda. The big Vision Coupe and little Kai Concept stole the show, won our hearts, and earned a ton of attention for the automaker. We can't wait to see how these two concepts impact the design, engineering, and technology of future production models. Take a look at our mega image gallery post below to see everything in high-resolution glory. Interestingly, the single biggest click-magnet of the 2017 Tokyo Motor Show was the BMW X2. We shouldn't be surprised. Crossovers of all shapes and sizes dominate the American marketplace, and the X2 is clearly the most attractive of BMW's even-numbered, coupe-influenced X models. Plus, it's headed for production, with sales starting in the spring of 2018. Moving past the Tokyo Motor Show, Autoblog readers are apparently very interested in the 2019 Chevy Camaro. Spy shots of just about every iteration of Chevy's muscle car lit up the 'net last week, leaving us very interested in seeing what's hiding behind all that camouflage. As always, tune in to Autoblog next week for a front-row seat to all the happenings worth following in the automotive industry. 2017 Tokyo Motor Show | Mega Gallery Mazda Vision Coupe | Tokyo Motor Show's big, sensuous 4-door Mazda Kai concept hints at a more muscular, refined Mazda3 2018 BMW X2 crossover revealed, adorned in gold and silver 2019 Chevrolet Camaro: 1LT, SS, ZL1 all spied with updated styling

2016 Mazda CX-5 [w/video]

It's difficult for me to get excited about crossovers. I try hard not to be the stereotypical car guy: ignoring the fact that the rest of the world loves these tall hatchbacks, while yelling, "station wagons make more sense!" until I've voided my lungs of air. Deep down I am that guy, but I work around it. Historically the Mazda CX-5 is one crossover that has been quasi-immune to my knee-jerking. It doesn't weigh two tons, offers a manual transmission (in poverty spec, but still...), and looks faster than its competitors. Most importantly, the CX-5 can round a corner without wobbling like a Slinky at the top of the stairs. No item on that list of plaudits would likely crack the top ten "desirables" for average small CUV shoppers. So, for the 2016 update, Mazda instead upgraded the in-cabin experience along with the requisite nips and tucks to the exterior. I borrowed a 2016 model CX-5 to see whether or not those concessions to comfort affected the car-nerd stuff. And to see if the Mazda could still be my go-to CUV recommendation. Driving Notes The engine options are unchanged for 2016. You can still have the fine, 2.5-liter four-cylinder engine, with its 184 horsepower and 185 pound-feet of torque, or its wimpier 2.0-liter lil' brother. My fully spec'd Grand Touring came with the bigger engine, which feels adequately powerful for the class, but not quick. In an era where turbocharged engines are everywhere, revving the Skyactiv 2.5-liter up to its torque peak at 3,250 rpm takes some commitment. I'm annoyed that there's no manual offered with the 2.5L (a combo I can have in both the Mazda3 and Mazda6), but I don't hate the automatic transmission. The six-speed unit is unobtrusive 99 percent of the time; something I regretfully can't tell you about certain nine-speed autos. There are no paddles to play with, but you can tap the shift lever up and down if you're struck by a need for total control. With a new center console and dash, and the addition of the Mazda Connect infotainment system, the '16 CX-5 feels like a new vehicle from behind the wheel. An attractive, pliant, leatherish material swaths the neat console and surrounding real estate. And the perforated leather seats feel damn near upscale. I think that Mazda Connect's version of the central control knob (with handy adjacent volume knob) is almost luddite-proof in its simplicity. There's no latency between twisting and reaction on the screen.