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Auto blog
2016 Mazda CX-9 First Drive
Mon, May 23 2016Automotive enthusiasts tend to obsess over spec sheets. How else could we know which cars and trucks are the quickest in a straight line, hold the road with the greatest tenacity, or tow the biggest trailers? More succinctly, what ammunition would we have in the seemingly endless back-and-forth of Internet forums if it weren't for specifications? Mazda's engineers think they've found a better way. The 2016 CX-9 has less horsepower than its primary competitors. The only engine available is a turbocharged four-cylinder, hooked to a six-speed automatic. Drivers won't miss the 23 horsepower (or more, as we'll soon explain) lost in the changeover from 2015 to 2016, because Mazda applied its holistic Skyactiv approach to the largest vehicle it offers. That means less weight and, ultimately, more fun. Or so they say. Are they right? Yes. And no. Most of the time, in normal on-road driving conditions, the 2016 CX-9 is the most fun you can have with three rows. But the real-world tradeoff didn't go off completely without a hitch. Reasoning that real-world performance is more important than ultimate horsepower, Mazda specified a four-cylinder for its big, three-row SUV instead of a more traditional V6. Let's get those all-important specifications out of the way: All 2016 Mazda CX-9s are fitted with a 2.5-liter turbocharged four-cylinder with 250 horsepower and, impressively, 310 pound-feet of torque at just 2,000 rpm. Unless you decide to use 87 octane, in which case you'll be limited to 227 horsepower. Mazda doesn't think owners will actually notice the difference in power levels, so there's no Premium Fuel Recommended sticker on the back of the fuel door. Mazda utilized some clever turbo trickery to deliver a diesel-like torque curve from its gasoline-fueled engine, which makes the small-displacement powerplant feel lively at low engine speeds. The flipside is that the CX-9 runs out of breath as the needle swings across the upper reaches of the tach. While that simply wouldn't do for a sportscar like the MX-5, in the CX-9 it's not necessarily a deal breaker. One benefit to the downsized engine is that it doesn't guzzle fuel. The EPA rates the CX-9 at 22 miles per gallon in the city and 28 on the highway. Drop one mpg all around for the all-wheel-drive model. Those figures beat out all the CX-9's most natural competitors, including the Honda Pilot and Toyota Highlander. The turbo-four Ford Explorer matches the 28-mpg highway figure, but loses by three in the city.
Mazda patents show rotary engine for range-extended EV
Fri, Mar 17 2017Two 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.
Mazda engineers urging execs for more RWD models
Wed, 02 Oct 2013According to Edmunds, Mazda engineers are pressuring the company to create more rear-wheel-drive models, in an effort to better differentiate itself from its rivals. This push is reportedly coming from middle and senior engineers within the company, and these folks at Mazda believe this rear-drive strategy would allow the automaker to produce more distinctive, fun to drive cars. Mazda discontinued the rear-drive (and rotary-engined) RX-8 a few years ago, leaving the MX-5 Miata as the company's only RWD offering.
As enthusiasts, we're fully on board with Mazda offering more rear-drive cars, but unsurprisingly, the company's top management isn't exactly keen on the idea - and with good reason. First and foremost, the cost associated with redesigning fresh architecture for new models would be very high, and considering the fact that Mazda hasn't exactly been raking in the dough lately, an expensive new venture like this doesn't make a whole lot of sense. What's more, Mazda's latest front-drive models - the Mazda3, Mazda6 and CX-5 - have been very well-received, and are helping the company gain sales momentum.
But that doesn't mean there aren't other options. Edmunds reminds us that Mazda is already partnering with Alfa Romeo on the next-generation Miata, and if this collaboration is successful, perhaps the relationship could bear additional fruit. After all, Alfa Romeo is said to be working on returning to its rear-wheel-drive roots, so Mazda's engineers might be able to make a case for more RWD goodness after all.