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Thread: Mazda announces plans for compression ignition gasoline engine

  1. #1
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Default Mazda announces plans for compression ignition gasoline engine

    This a very big deal for ICE technology. The only thing else on the horizon this game changing is Koenigseggs variable lift valve, camless technology

    https://insidemazda.mazdausa.com/pre...oom-zoom-2030/

    Video commentary from an Australian auto website


    SKYACTIV-X NEXT-GENERATION ENGINE
    Technological innovations

    SKYACTIV-X is the world’s first commercial gasoline engine to use compression ignition, in which the fuel-air mixture ignites spontaneously when compressed by the piston
    A proprietary combustion method called Spark Controlled Compression Ignition overcomes two issues that had impeded commercialization of compression ignition gasoline engines: maximizing the zone in which compression ignition is possible and achieving a seamless transition between compression ignition and spark ignition.
    Features

    This new proprietary combustion engine combines the advantages of gasoline and diesel engines to achieve outstanding environmental performance, power and acceleration performance.
    Compression ignition and a supercharger fitted to improve fuel economy together deliver unprecedented engine response and increase torque 10–30 percent over the current SKYACTIV-G gasoline engine.3
    Compression ignition makes possible a super lean burn4 that improves engine efficiency up to 20–30 percent over the current SKYACTIV-G, and from 35–45 percent over Mazda’s 2008 gasoline engine of the same displacement. SKYACTIV-X even equals or exceeds the latest SKYACTIV-D diesel engine in fuel efficiency.
    With high efficiency across a wide range of rpms and engine loads, the engine allows much more latitude in the selection of gear ratios, providing both superior fuel economy and driving performance.
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    Administrator ucfbrett's Avatar
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    I remember reading a trade news story a year or so ago in which the reporter was asking Mazda's CEO why the company had not begun developing any hybrid or alternative propulsion systems for its cars.

    His response was something along the lines of, "We have only developed the internal combustion engine to 40 percent efficiency," and that there was clearly a lot more potential in gasoline and diesel powertrains.

    This new development aligns with those comments.

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    Chest hair required Olitho's Avatar
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    It is a wonderful golden age of cars.

    The future presents more risk and opportunity than ever before, akin to the oil crisis era of the early 1970s.
    ucfbrett likes this.
    To the right of The Sheriff. Isn't everyone?

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    Senior Member robburgoon's Avatar
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    Quote Originally Posted by Olitho View Post
    It is a wonderful golden age of cars.

    The future presents more risk and opportunity than ever before, akin to the oil crisis era of the early 1970s.
    Risk and opportunity, created almost entirely by aggressive government market manipulation. Oli, you feeling ok?
    Johns_EvoIXSE likes this.

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    Chest hair required Olitho's Avatar
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    Quote Originally Posted by robburgoon View Post
    Risk and opportunity, created almost entirely by aggressive government market manipulation. Oli, you feeling ok?
    I am not sure what you mean. Cars like the Focus RS, GT350, Camaro ZL1, M5s, BRZs and more are not the byproduct of government market manipulation. They are a product despite the manipulation.
    Johns_EvoIXSE likes this.
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    Senior Member robburgoon's Avatar
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    Quote Originally Posted by Olitho View Post
    I am not sure what you mean. Cars like the Focus RS, GT350, Camaro ZL1, M5s, BRZs and more are not the byproduct of government market manipulation. They are a product despite the manipulation.
    Fair enough. But this engine tech from Mazda probably wouldn't have happened without intense CAFE pressure.
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    Slightly OT... I wonder if this type of technology could be used for super efficient two-strokes.

    Anyone who has inadvertently dieseled a two-stroke knows that you can virtually fuel cut and RPM will take off under lean and no spark.

    Dry sump lube, direct injection, valves, VCR - maybe it's possible to achieve considerable gains for the same displacement and with comparable emissions via more complete/instantaneous combustion not seen before in two-strokes.

    A two-stroke version might just be the evolution of this tech in the future.

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    Administrator ucfbrett's Avatar
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    Outboard engine manufacturers, specifically Johnson/Evinrude, have advanced two-stroke technology quite a bit over the last 20 years.

    In its E-Tec motors, the company drastically cut emissions and pollution using direct injection and timing the exhaust ports in the cylinder walls to be closed when new fuel is delivered. There are other tricks, but those two features were the biggest leaps.

    The engines still inject gas and oil into the cylinders, but they don't smoke at all.

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    Chest hair required Olitho's Avatar
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    Quote Originally Posted by SeanB View Post
    Anyone who has inadvertently dieseled a two-stroke knows that you can virtually fuel cut and RPM will take off under lean and no spark.

    ...A two-stroke version might just be the evolution of this tech in the future.
    Yes, the best way to stop a two-stroke when it does this is pull the choke and flood it with fuel to cool it off and/or restrict the air.

    Mazda might be doing this with their rotaries which are very two-stroke like.
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    Quote Originally Posted by Olitho View Post
    Mazda might be doing this with their rotaries which are very two-stroke like.
    That's an excellent point. And on the flip side, I wonder if Mazda's pursuit of a Renesis successor is what inspired this tech. That decision looks a lot smarter if that's the case.

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    The Real Captain Slow Red_5's Avatar
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    Mazda Is Developing Wild Triple Charged Engine

    Patent shows twin turbos and electric supercharger.
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