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Mazda patents show rotary engine for range-extended EV

Two years ago, Mazda introduced a fascinating range-extended electric car called the Mazda2 RE Range-Extender. It took an electric Mazda2, and dropped in an itty-bitty 330cc rotary engine. It wasn't the rotary-powered sports car we had hoped for, but it seemed like a unique way to keep the quirky engine alive and kicking. But not long after the car's reveal, it seemed to disappear. Now the basic idea has resurfaced with a few modern updates in a couple of US patents. The first patent is pretty straightforward and describes a range-extended EV similar to the BMW i3. At the front is an electric motor driving the front wheels. At the back is an internal combustion engine that powers an electric generator. In the middle is a lithium-ion battery for storing and delivering electricity. It's the same set-up as that Mazda2. The second patent is for an engine start-and-stop system, but specifically for rotary engines. The system is designed to shut off a rotary engine when not needed, much as modern piston engines do. It also stops the rotor in a position that closes the intake port to ensure no fuel or exhaust emissions slip out through the intake tract. This is necessary since there are no valves in a rotary, and air and exhaust come through ports that are "opened" and "closed" by the rotor itself. The patent also describes the possibility of firing a spark plug after the fuel has been cut to eliminate any leftover fuel emissions. This system would theoretically improve a rotary engine's fuel economy and emissions significantly, which would be a boon as those are two of the rotary's major weaknesses. The rotary-engine patent also includes the same range-extended powertrain drawing as the first patent. It's there as a description of a possible application. And in such an application, where the rotary wouldn't have to run all the time, the system could take advantage of the rotary's inherent strengths. Weight can be kept low thanks to the engine's small dimensions, which should help in keeping the car sprightly and efficient. Rotaries are renowned for smoothness, too, so it shouldn't need too much refining and sound deadening, the latter of which adds more weight. The small size would also help with packaging, leaving more space for people, cargo, or possibly batteries. And since it has been patented, the company may be looking to bring the system to market.

Consumer Reports says infotainment systems 'growing first-year reliability plague'

The Consumer Reports Annual Auto Reliability Survey (right) is out, and the top two spots look much the same as last year's list with Lexus and Toyota in first and second place, respectively. However, there are some major shakeups for 2014, with Acura plunging eight spots from third in 2013 to 11th this year, and Mazda replaces it on the lowest step of the podium. Honda and Audi round out the top five. This year's list includes six Japanese brands in the top 10, two Europeans, one America and one Korean.
Acura isn't the only one taking a tumble, though. Infiniti is the biggest loser this year by dropping 14 spots to 20th place. Other big losses come from Mercedes-Benz with an 11-place fall to 24th, and GMC, which declines 10 positions to 19th.
Perhaps unsurprisingly, it's not traditional mechanical bugs hauling down these automaker's reliability scores. Instead, pesky problems with infotainment systems are taking a series toll on the rankings. According to Consumer Reports, complaints about "in-car electronics" were the most grumbled about element in new cars. Problem areas included things like unresponsive touchscreens, issues pairing phones and multi-use controllers that refused to work right.

Editors' Picks March 2024: Refreshed Acura TLX, the Mazda CX-90 and more

This month, a wide variety of body styles and powertrain propositions earn Editors' Picks status. The brand-new Mazda CX-90 has impressed us in many forms, but that comes as no surprise. The Tonale from Alfa may not be a super-hot performance SUV like the Stelvio Quadrifoglio, but it's still captured our love. And for those wishing to remain lower to the ground, the V60/V60 Cross Country bring style to the limited pie that is the wagon market. Lastly, Acura updates its TLX, and the package only gets better. In case you missed previous Editors' Picks posts, here’s a quick refresher on whatÂ’s going on here. We rate all the new cars we drive with a 1-10 score. Cars that are exemplary in their respective segments get an EditorsÂ’ Pick designation. Those are the ones weÂ’d recommend to our friends, family and anybody whoÂ’s curious and asks the question. You'll find the entire list of Editors' Picks at this link here, which we keep updated as cars are either added or dropped from the list. The vehicles youÂ’ll find below consist of every car we rated in March that earned an EditorsÂ’ Pick. 2024 Mazda CX-90 2024 Mazda CX-90 PHEV Premium Plus View 70 Photos Quick take: The driver's three-row SUV. Enthusiasts who need space should seek out the CX-90. It translates Mazda's enthusiast DNA into a people hauler. Score: 8 What it competes with: Honda Pilot, Kia Telluride, Jeep Grand Cherokee L, Chevy Traverse, Subaru Ascent, Ford Explorer, Toyota Highlander, Mazda CX-9, Kia Sorento, Buick Enclave, Nissan Pathfinder, VW Atlas Pros: Lovely to drive inline-six; premium interior; will make you forget you're driving a family hauler Cons: Limited third-row and cargo space for the segment; PHEV is rough around the edges From the editors: News Editor Joel Stocksdale — "With excellent driving dynamics, classy interiors, strong powertrains and good value, the CX-90 should be high on anyone's shopping list, whether they're looking at mainstream or upscale brands. It's a strong competitor in a big field. The available interiors put it on par with some real upscale brands. It's not perfect, but it's very good, and it's a good sign for future Mazdas." Road Test Editor Zac Palmer — "There's little doubt that the CX-90 is the affordable three-row SUV for enthusiasts, and I think the inline-six is likely your best bet.