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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.

2019 Mazda6 Skyactiv-D diesel caught in spy photos

We get it – we're a little sick of getting a few years of assurances that Mazda's much-anticipated diesel engine is just around the corner. First, it was going to go in the 2014 Mazda6, then it was delayed. More recently, Mazda told us it'd first land in the CX-5 – and in fact, there's a part of the Mazda USA website devoted to the diesel crossover, which makes it seem more legitimate than previous pronouncements. But the fact of the matter is, there's some unforeseen hiccup in the government approval process for this engine, likely centered around emissions standards, and it seems to be dragging on. But this Mazda6 was spotted at an EPA facility in Michigan, which gives us some hope that perhaps the company is rounding the final base on the approval process. It looks very much like an American-spec Mazda6 to our eyes ... except for the strange, possibly temporary exhaust outlets, which might be required for EPA testing. The rear looks like a current-look car, rather than the revised 2018 styling that will get the 2.5-liter turbocharged gas engine. Since the Mazda6 was originally supposed to get the Skyactiv-D engine, we can only assume that if it's at an EPA facility, Mazda is hoping to bring it to market here – likely sometime after the CX-5 goes on sale. If Mazda can get approval, it'll be another point of differentiation between the Mazda6 and its competitors – there's no currently-approved diesel sedan that's a direct match. The smaller Cruze and larger, more expensive offerings from BMW and Jaguar are about it. The fuel economy guide (PDF) produced by the EPA back in late 2017 lists both the CX-5 and the Mazda6 as having diesel engines, but neither are rated, and as we know at this point, neither are on sale or have an official timeline for doing so. We can assume anything with an application in progress made it on the list, whether approval would be granted or not. It seems unlikely at this point that Mazda would abandon the Skyactiv-D in America. It's a solid part of their strategy, although a product roadmap released a few months ago shows that Mazda expects diesel sales globally to taper off after 2020, to be supplanted by plug-in gas hybrid, EV, and fuel cell vehicles. But between now and about 2030, pure diesel cars are expected to be a small but significant portion of Mazda's product mix. We hope this means we'll see the CX-5 emerge from the approval process and hit dealer lots soon, to be followed by the 6.

2019 Mazda3 First Drive Review | Defining the term 'fun to drive'

Fun to drive. The phrase gets blasted from seemingly every car commercial, magazine ad, and influencer account – overused that it has lost all meaning. So when Mazda, a small firm that actually does make cars that are fun to drive, talks about their most compelling trait it gets lost in the cacophony of ad spends. However, we're here to tell you that yes, while it's difficult to quantify, some cars are objectively more fun to drive than others, and the all-new 2019 Mazda3 is — and this is a very technical term — a freakin' blast. At Mazda's behest, we took a 2019 sedan up Angeles Crest Highway just outside of L.A. With plenty of yellow signs, tight sequences of banked curves and elevation changes, it's the platonic ideal of those serpentine mountain roads you see in car commercials. The instant the Mazda3 reaches the windy roads, it glides in like an otter diving into the sea. Lively and graceful, it dances along a ribbon of asphalt more naturally than any compact sedan we've driven since the advent of drive-by-wire. The steering is not only direct and true, but possesses an extraordinary ability to maintain trajectory. From the moment you turn in, you never need to make adjustments to the steering wheel until the front tires are straight again. The car goes exactly where you intend, always. That's not hyperbole, but an amazing feat of engineering. In nearly every other vehicle, even those that purport to be sports cars, unless you're incredibly familiar with the machine and know the road like the back of your hand, minor mid-corner corrections are an inevitability. With the 3, you get it right on the first try. Now imagine you're on strip of canyon pavement with lots of short switchbacks in varying radii coming up fast, one right after another. The 3 links them all together with pure ease, and soon you're developing a rhythm through the curves. While other cars charge, the Mazda flows. The car's poise is particularly evident as momentum shifts from one direction to another, what Mazda chassis engineer Dave Coleman termed "transience." In most cars passengers are tossed around the cabin like mannequins, but the 3 cuts out the turbulence, its body engineered to move in a smooth undulation. At the midpoint of the transition, there's even a moment of weightlessness before the car tucks into the next turn and the seat seems to scoop you up and carry you onward.