1987 Mazda Rx-7 on 2040-cars

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Patent application suggests Mazda rotary return

A recent patent application by Mazda reveals that the Japanese automaker is still working on the rotary engine. This could in fact be the Skyactiv-R engine found in the RX-Vision concept from the 2015 Tokyo Motor Show. As with anything Wankel-related, nothing is certain until Mazda makes a production commitment. But this filing suggests that serious development is happening in Hiroshima. The 2011 Mazda RX-8 was the last rotary-powered car you could buy in America. Slow sales, poor fuel economy, and tighter emissions standards prevented Mazda from committing to a follow-up. But the fundamental principles of the rotary - compact size and light weight - perfectly fit Mazda's Skyactiv ethos. (For an explanation of how rotaries work, click here.) In this new engine the intake port sits at the bottom of the engine with the exhaust port on top instead of the other way around. That allows for lower mounting, which improves a car's center of gravity. This rotary is also turbocharged. Putting the turbo up high helps ensure it doesn't get in the way of any body or chassis crossmembers. The implication of those claims is that somebody is thinking about how to put this engine in a car. There are other benefits as well. The short path from the exhaust port to the turbo ensures minimal turbo lag. It also allows for a close-mounted catalyst on top of the enigne, which will help emissions. Another innovation in this new engine is a triangle-shaped rotor that covers part of the exhaust port. This allows for different exhaust flow characteristics. The filing claims that that two of the four orientations allow for less airflow resistance in the exhaust port. As in previous Mazda rotaries, there are two spark plugs to manage ignition timing and combustion. But unlike in the 16X concept, Mazda's last public display of such an engine, the new rotary uses port fuel injection. Keep in mind this is only a patent application. A Mazda spokesperson refused to comment on future product, but commented "As we stated at the Tokyo motor show, Mazda is doing all that it can to bring a rotary to the market." In the meantime, keep your RX-7 prayer candles lit and hope for the return of the rotary before the end of the decade. You can bide your time by reading the entire application here. Related Video: Related Gallery Mazda RX-Vision Concept: Tokyo 2015 View 11 Photos News Source: USPTO via autoevolution Rumormill Mazda Performance rotary mazda rx7

2019 Mazda 3 recalled because the wheels could fall off while driving

Here’s a recall we had to read twice before believing. Mazda is bringing in 25,003 Mazda 3s that just rolled off the assembly line, because the wheels may fall off while driving. All the Mazda 3s are 2019 model year cars, so itÂ’s only the totally new generation Mazda 3 under the gun here. Thankfully, Mazda says there are no cases of this occurring to owners, and therefore no injuries or deaths related to the issue. As for the cause of the wheel detachment? Mazda put out a statement explaining the issue at hand.  “A manufacturing process error may result in a gap between the wheel hub bolt and hub flange during assembly. This gap causes loosening of the lug nuts though they were initially tightened to the correct specification at the plant. A rattling noise occurs prior to a wheel detachment from the vehicle,” Mazda says. ItÂ’s heartening to see Mazda did in fact tighten the lugs at the factory, but still extremely troubling to see that they can loosen all on their own. Our advice? Walk on out to your shiny, new Mazda 3 and torque those lugs to spec. If you donÂ’t have a torque wrench, then just use the wrench that came with the car to make sure theyÂ’re not loose. Those that have a new Mazda 3 should be on the lookout for a recall notice in the mail. YouÂ’ll then be able to take the car to the dealer for Mazda to fix the problem. Until then, just keep an eye on your lugs. A wheel flying off while driving at speed is always a recipe for disaster, and we sure do enjoy driving the new Mazda 3 at speed.

More powerful 2019 Mazda MX-5 also more efficient

Bumping the 2019 Mazda MX-5 Miata's power from 155 horses to 181, plus little interior upgrades such as a telescoping steering wheel were more than enough to make the appealing roadster even more so. But there's yet another bonus in store for those that pick up the new Mazda: more efficiency. As initially spotted by industry watcher Bozi Tatarevic, the EPA released fuel economy numbers for the new model, and they're better than the 2018's. And between the automatic and manual versions, the manual sees the biggest increase. Now, these are, very, very minor increases in EPA fuel economy, but any increase is welcome when nothing is lost. The automatic continues to be the most efficient. While the city and highway ratings are unchanged at 26 and 35 mpg respectively, the combined rating increases by 1 mile per gallon to 30. The manual transmission model isn't far behind. City mileage stays the same at 26 mpg, as does the combined rating of 29 mpg. However, highway fuel economy picks up 1 mpg for a total of 34. So to recap, the 2019 Miata retains its good looks, and likely its playful handling and snickety shifter. But it also gets more power, better fuel economy, a better interior, and more options to customize than ever before. This is sounding like it could be the best Miata, yet. We can't wait to try it out. Related Video: Mazda Convertible Performance