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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.

VW Finds CO2 'Irregularites', SEMA Recap, and More | Autoblog Minute

Volkswagen's diesel emissions scandal gets a new wrinkle, US regulators hit Takata Corporation with a substantial fine, and we head to Vegas for a look at tuner paradise at the 2015 SEMA show. Autoblog Senior Editor Greg Migliore reports on this edition of Autoblog Minute Weekly Recap. Acura Chevrolet Honda Mazda Mitsubishi Toyota Autoblog Minute Videos Original Video Acura Legend

2002 Mazda MX-5 Miata powered by a Jaguar-sourced V6 for sale

Cars & Bids, a relatively new site that specializes in auctioning modern enthusiast cars, is selling a 2002 Mazda MX-5 Miata. While that's hardly unusual, this example lost its four-cylinder engine and gained a Jaguar-sourced V6. Pulling a 3.0-liter six out of a 2000 S-Type and dropping it into an unsuspecting Miata is apparently easier than it sounds. England-based Rocketeer offers a kit that makes the swap reasonably straightforward, though the listing notes the factory air conditioning system is not compatible with the new engine. Cold air aside, the installation is done so neatly that it looks like Mazda envisioned the Miata with a bigger engine. Jag's V6 inevitably adds weight to a roadster praised globally for its nimble handling, but it also brings a whole lot of horsepower to the table. Left stock, a 2002 Miata is powered by a 1.8-liter four-cylinder that makes 142 horsepower and 125 pound-feet of torque. The example listed on Cars & Bids puts 220 horsepower and 221 pound-feet of torque under the driver's right foot, figures that easily offset the weight gain. And, somewhat surprisingly, the six spins the rear wheels through a stock five-speed manual transmission. Flyin' Miata sway bars and Koni shocks improve handling. Close the hood, and this Jagazda looks like a run-of-the-mill 18-year-old Miata. The seller made no modifications to the body, it's still painted in its original shade of silver, and he kept the stock 15-inch wheels. The dual exhaust tips hint at the V6, but they're subtle enough to surprise more than a few racers at the next autocross event. The auction is live now, and bidding stands at $4,250 as of writing with about three days left before the hammer drops. If you miss your chance to bag it, several shops sell kits that let skilled shade-tree mechanics shoehorn Mazda's K-Series V6 (which powered the MX-6 and the Ford Probe, among other cars) into an older Miata. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.     Featured Gallery 2002 Mazda MX-5 Miata with Jaguar V6 View 14 Photos Aftermarket Jaguar Mazda Convertible