• Sep 2nd 2010 at 1:06PM
  • 22
Mazda6 mules are out there somewhere being tested right now for a planned debut in early 2012. The vehicles feature an entirely reworked suspension, an advanced six-speed automatic transmission and a multi-purpose platform that will underpin several new Mazda models. Mazda sources say that the new 6, with its advanced platform and new range of engines, should be future-proofed for upcoming emissions and safety standards for at least a decade after its launch, but Mazda's approach to engineering engines that will meet future regulations is rather unusual. Or, as Autocar puts it, the company's Sky mills are "uniquely engineered."

At launch, the Mazda6 will be available with at least two entirely new Mazda-developed Sky engines. According to the company, both the 2.2-liter Sky D diesel and the 2.0-liter Sky G gasoline engines will offer best-in-class fuel efficiency, but both engines achieve their fuel-sipping status via unconventional designs. The diesel unit has a relatively low 14:1 compression ratio and meets 2013 Euro 6 emissions regulations, but does so without expensive NOx traps and therefore is cheaper to build than many of today's Euro 5 diesel mills. The gasoline engine is normally aspirated, but its high 14:1 compression ratio gives it much-improved low-end torque. Key to the engine's design is its oversized 4-2-1 manifold. This manifold boosts power, but also requires more packaging space. Both engines conform to Mazda's global powertrain strategy and, as such, they will see widespread use in numerous company vehicles in the coming years.

[Source: Autocar]

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    • 1 Second Ago
      • 5 Years Ago
      That engine is not electric.
        • 5 Years Ago
        1 or 2 cylinder low volume combustion engines for range extenders are ok. the rest like this need not apply.
        • 5 Years Ago
        are you sure?
        • 5 Years Ago
        (Thinks about inserting screed here that all improvements count since electric vehicles will not make up more than a minor percentage of global fleets over the next twenty years).

        (Looks again at the board he's on, the number of "electric or dead" fanatics online and thinks... never mind).
      • 5 Years Ago
      hmmm..... mpg sounds good for what it is.
      but with compression ratios like that - does it need jet fuel to run?


      No, seriously though, I wonder what kind of fuel will be required.
        • 5 Years Ago
        14:1 can be ran in a premium gasoline engine with direct injection actually. No magic tricks required.

        My guess is that it requires premium. I'd put premium in a car like that if it got that sort of fuel economy. What's 20-30 cents per gallon when you're getting 5mpg more than most 2.0's, ya know?
      • 5 Years Ago
      I'd like to see the 2.2-liter Sky D diesel in the Shinari concept should it ever hit production!
      • 5 Years Ago
      I don't get the complaints. The ICE is here for the foreseeable future. Making it more efficient is only a good thing.

      If Mazda puts in a Sky Engine and loses the Smiley face, they Mazda 3 will be high on my next car list.
      • 5 Years Ago
      Face Lift Mazda 3 (no big Smile) is out early next year..
      Mazda's new Sky engines ARE a 10 year one...with Air pump.
      • 5 Years Ago
      I welcome the new Mazda technology, but it is entirely ridiculous to beleive these are ten year engines, requiring no change to be competitive. Lev III regulaltions are coming in California which will require Zero emissions ICEs, before then, even if most modern gasoline ICEs meet them already. Meeting the EU VI specs is hardly revolutionary; American models require lots more right now with much more rigorous regulation to come.

      Plus technology is about to hit the market that has been in development for a long time. Most ICEs will be semi-diesel, lightweight ICEs half th eweight of a diesel engein, acheiving both zero emissions and Diesel like mileage as HCCI becomes common.

      Plus PHEVS, EREVS and clean PCCI diesels will also be common, and Mazda engines incorporate none of these technologies.
        • 5 Years Ago
        Sorry, but you're just plan wrong about LEV III. LEV III is a tailpipe emissions regulation, not a ZEV mandate. LEV III is an update of LEV II, and it will require that no car (diesel or gasoline) can be sold in California unless it meets Super Ultra-Low Zero Emission Vehicle (SULEV) tailpipe emissions. Under LEV II, the requirement is ULEV. Zero emission vehicles (ZEV) are called for in the ZEV mandate, not LEV III.
        • 5 Years Ago
        Since Ford Motor Company holds a controlling stake in Mazda, Mazda will be most likely able to use Ford's technology for hybrid vehicles, so do not immediately assume that Mazda will not begin developing hybrids or vehicles using other technology.
        • 5 Years Ago
        Ford sold a big chunk of it's Mazda holding and no longer has controlling interest.

      • 3 Years Ago
      That's pretty awesome. High compression + forced induction would be even better. Btw, check out this lens to check your compression: http://www.squidoo.com/what-is-a-compression-tester Just thought id share, just found out my z has low compression :(
      • 5 Years Ago
      They have claimed that this engine pulls 30/40mpg in a test Mazda3.

      if it lives up to the hype, color me impressed. For the past few decades, Mazda has been lacking in MPG pretty badly. I wonder what the power output is like, if it's gimped out in order to produce that kind of MPG.
        • 5 Years Ago
        probably mazda cycle :)
        • 5 Years Ago
        And I suppose the Fiesta has a two liter engine?
        • 5 Years Ago
        "They have claimed that this engine pulls 30/40mpg in a test Mazda3."

        On an EPA cycle or just a Mazda cycle?

        Btw: The Fiesta pulls 29/40 on the EPA cycle. I guess that's why Mazda is saying best "in class".
        • 5 Years Ago
        1.6L.. no direct injection either. Something like 120hp i believe.
      • 5 Years Ago
      With 14:1 on Gasoline you will HAVE to run the motor exclusively on higher priced premium fuel. The fuel companies make standard unleaded such a low octane product these days (and no-one can sue them for doing engine damage) even 10:1 motors ping the entire time they're running on it.

      This motor still has belt driven accessories, that's rubbish.

      A 30% increase in fuel economy is NOT a 30% increase in energy efficiency, it generally means they just turn parts of it off as often as possible. It's a petrol ICE, so it will always remain 25% energy efficient.

      The whole thing is a Greenwash!
        • 5 Years Ago
        Knock sensors prevent pinging from occurring. What happens is that the ignition timing is retarded. The result is less power across the band, and noticeably lower fuel economy. That's how electronically fuel injected cars deal with lower octane. Knock sensors have been in cars since the 90's ( OBD1 ), and i wouldn't be surprised if they were in some 80's cars also.

        There is nothing criminal about selling low octane gas. The majority of cars are designed to run with the stuff.

        A 14:1 DI engine will happily run on 91 octane with that compression ratio. The higher your compression is, the more power you make per liter. What Mazda is probably going to do is add long gearing for fuel economy, and the high compression ratio is there to make up for the acceleration deficit from the gearing. Ultimately it's all up to speculation, but i have a good feeling about this powerplant.

        By the way.. how is an engine that gets better fuel economy a greenwash?
        • 5 Years Ago
        "It's a petrol ICE, so it will always remain 25% energy efficient."

        Utter nonsense, that is just an OLD rule of thumb, not some kind of limit. Any decent modern 4 cyl is probably ~30% today.

        The previous Prius engine was tested by Argonne labs. It was between 34% and 37% efficiency through more than half it's operating range.

        The new breed off higher compression DI engines may reach mid thirty percent ranges.

        The next gen top HCCI engines will likely reach 40%...

        40% is likely where the Petrol ICE will top out. But that will be pretty good.

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