Mazda HCCI Engine

    10 months ago

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    Mazda HCCI Engine

    Comments (10)
    Repost
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    Marco Marotta posted in
    Engineering Explained

    It's the time to introduce the Homogeneous charge compression ignition (HCCI) technology. (HCCI) is a form of internal combustion in which well-mixed fuel and oxidizer (typically air) are compressed to the point of auto-ignition. As in other forms of combustion, this exothermic reaction releases energy that can be transformed in an engine into work and heat. HCCI combines characteristics of conventional gasoline engine and diesel engines. Japanese automaker Mazda Motor will introduce a new engine at the end of 2018 that offers 30% better fuel efficiency by using pressure, not spark plugs, to ignite fuel. Though the automaker is developing environmentally friendly electric vehicles, Mazda thinks the internal combustion engine will continue to account for the majority of new-vehicle sales for the foreseeable future and that the company's technology will give it a leg up on the competition. Mazda plans to incorporate the new engine in 2018 in the new Mazda3, dubbed Axela in Japan, which will undergo its first overhaul in five years. The engine then will be adopted gradually by other models. The automaker positions the engine as the second generation of its Skyactiv suite of environmentally friendly technologies, which were introduced in 2011. The new engine ignites the mix of fuel and air by subjecting them to pressure, making combustion more efficient than conventional engines using spark plugs. This method also reduces exhaust emissions. Varied configurations among models make simple comparisons difficult, but the new engine would give the current Mazda3 mileage approaching 30km per liter, according to estimates. Mazda will start mass-producing electric vehicles by 2019 and plans to have a plug-in hybrid as of 2021. The automaker is targeting the U.S. and European markets, where environmental regulations are becoming stronger, but the company plans to incorporate the engine in autos built for the global market, including developing nations, by at least 2030. (Nikkei)

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    Comments (10)
    • no magic potions or any thing like that. Mazda got board and made a diesel engine that can run on gas. That's it. A diesel engine doesn't get it's name because of the fuel we put in it, it gets its name from its inventor, Rudolf Diesel. The man that invented the compression ignition engine.

      26 days ago
      1 Bump
    • Looks like Mazda has made some information public about the new HCCI engine, called an "SPCCI" engine by the manufacturer. Having an atikinson cycle 4 stroke process and still using a spark plug, at least some of the time, should allow for plenty of control over CR and ignition timing. There is also word that it will be supercharged in some form, so it could be the best of every world as far as internal combustion reciprocating engines go if they get the electronic control right.

      Here is a link to EE youtube video that has more info about how it will work.

      youtu.be/9KhzMGbQXmY

      4 months ago
      1 Bump
    • Hot California desert roads will have these cars on the side of the road running that spastic drumbeat of pistons gone wild that only 1970's carbureted V-8's without knock prevention could do. I think that i would need more information on this, as temperature and air densities, and fuel quality would play huge roles in the combustion.

      10 months ago
      1 Bump
      • Good point, but im pretty certain Mazda have already taken such issues into the development..
        3 months ago
      • Think you have it in one Dennis, with modern ECUs then fuel/air mix is readily controlled to avoid the problems of BIG V8s on carbs. As the basis of it's operation is the equivalent of...Read more
        2 months ago
    • Isn't this going to cause detonation of the fuel charge? It will have consistent vibrations like in a Diesel engine and therefore require a more rugged structure, will the increase in the compression rate make up for these downsides in terms of emissions and power?

      10 months ago
    • This is interesting, I've been looking at purchasing a Mazda, so it'll be good to see how this new engine stands up and performs!

      10 months ago
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