1996 Mazda Miata Mx-5 Convertible - Low Mileage - Great Car! on 2040-cars

Auto blog

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 engineer explains why there won't be a Mazdaspeed3

When Mazda put the new, beautiful Mazda3 on its stand at last year's L.A. Auto Show, it didn't take long before someone asked about a Mazdaspeed3. It took even less time for the Japanese automaker's new global boss, Akira Marumoto, to cite his company's small size and say, " [My] answer would be no." During first drives of the compact hatch last month, Road & Track asked Mazda development vehicle engineer Dave Coleman what Mazda would need in order to resurrect an MPS version. Coleman detailed a few reasons for the Mazdaspeed's continued hiatus, the prohibitive cost foremost. But another hitch is that the Mazdaspeed we'd get now isn't the Mazdaspeed enthusiasts would want. Coleman told the magazine, "If we had an engine on the shelf that would fit that properly, then we could talk." But the price to develop an engine and supporting hardware to do the car right isn't in the budget for an automaker of Mazda's size. Perhaps more important, though, present-day Mazda wouldn't — and couldn't — whip up another raw, rapid hatch. The competition, and consumers, have changed. "Even the Mazdaspeed 3, in its last iteration, came out as raw as it did due to the constraints," Coleman said, and today's market won't put up with that kind of buzzy, excitable uncouth anymore. The question is, even if Mazda had the money, do the buyers pining for a zoom-zoomier Mazda3 want the mature, composed hot hatch they'd be offered? Head over to Road & Track to read Coleman's take on the matter, and how he lays out the gap that would swallow any potential MPS as, "What you think you want is rawness. What you really want is responsiveness and directness." Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Next-gen Mazda MX-5 Miata mule spied 'Ring testing

Fans of simple, lightweight motoring, rejoice - we now have images of the next-generation Mazda MX-5 Miata undergoing testing at der Nürburgring Nordschleife. Now, to be fair, this isn't some lightly camouflaged example that will give us a great peak of what the next Miata, which will also become the next Alfa Romeo Spider, will look like. This is a mule, with the new bits hidden under a current Miata's body. That doesn't mean there aren't a few scraps of valuable information here, though.
According to our flock of camera-toting spies at the Nürburgring, the next Miata is likely to grow a bit, as new models are wont to do. In particular, it will be longer and wider, and the wheelbase is likely going to be stretched, based on the shape of the wheel wells and doors. Both of those factors will add more space in the cabin.
Those are the big indications provided by these photos, but while the MX-5 might be growing, it's a safe bet based on these images that it, and the (likely pricier) Alfa, will retain the classic, long-hood, short-deck styling that so typifies rear-drive roadsters.