Jump to content
Create New...
  • William Maley
    William Maley

    The Debrief: Hyundai's GDCI Four-Cylinder Engine

    William Maley

    Staff Writer - CheersandGears.com

    November 15, 2013

    Imagine taking the benefits of a diesel engine and using that for a gasoline engine. Well Hyundai is doing just that. During a media briefing at the company's Technical Center in Superior Township, MI, Hyundai gave us the preliminary details on their GDCI (Gasoline Direct-Injection Compression) engine.

    The goal with the GDCI engine is to "achieve diesel levels of fuel efficiency with conventional gasoline," said Nayan Engineer (Yes, that is his real last name), Hyundai's manager of engine design and testing. Other goals of the engine that Enginner outlined is that it will offer "equal to better performance than conventional gasoline engines" and a "lower system cost (than) diesel engines."

    So how is Hyundai planning to pulling this off? Well it begins with the combustion cycle. Much like a diesel engine, the GDCI engine will use high compression (14.8:1 in this case) to ignite the fuel. There is also a set of exhaust valves that open twice per cycle to let heat in to help in the combustion cycle.

    The GDCI engine also features a twincharging setup. A mechanical supercharger helps boost power on the low-end, while turbocharger takes over on the high-end.

    How much power does the GDCI engine produce? Well, a 1.8L four-cylinder GDCI engine can produce 180 horsepower on a engine dyno. The engine currently has a redline of 4,500 rpm, so it will act and possibly sound like a diesel engine.

    The GDCI is currently being worked by Hyundai, Delphi, and the University of Wisconsin. Hyundai hopes to begin testing the engine in vehicles sometime next year. When asked if we'll see this engine in production, Engineer said that it will arrive "not too distant future." Our guess, maybe sometime within the next ten years.

    William Maley is a staff writer for Cheers & Gears. He can be reached at [email protected] or you can follow him on twitter at @realmudmonster.

    User Feedback

    Recommended Comments

    It's a shame that GM was never able to bring their HCCI engine to market. They had prototypes running back in 2008. This Hyundai engine sounds very similar to the GM HCCI.

    That was actually brought up during the presentation. The problem with HCCI was GM wasn't able to get the power needed and there was concern of engine damage due to pressure needed to ignite the gas.

    Link to comment
    Share on other sites



    HCCI was not only compression ignition (CI) but also homogenised charge, As the speed of an engine is usually controlled by changing the fuel mix and quantity supplied to the engine and ignition timing, and these seem to be compromised at the least by HCCI, then it would seem that such an engine would be mostly set at a constant speed, with vehicle speed being more dependent on an advanced transmission such as an IVT.

    I wonder if the GDCI might have a similar issue, albeit the homogenous charge aspect may well be different.

    Link to comment
    Share on other sites

    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.
    Note: Your post will require moderator approval before it will be visible.

    Add a comment...

    ×   Pasted as rich text.   Paste as plain text instead

      Only 75 emoji are allowed.

    ×   Your link has been automatically embedded.   Display as a link instead

    ×   Your previous content has been restored.   Clear editor

    ×   You cannot paste images directly. Upload or insert images from URL.

  • google-news-icon.png

  • google-news-icon.png

  • Subscribe to Cheers & Gears

    Cheers and Gears Logo

    Since 2001 we've brought you real content and honest opinions, not AI-generated stuff with no feeling or opinions influenced by the manufacturers.

    Please consider subscribing. Subscriptions can be as little as $1.75 a month, and a paid subscription drops most ads.*

    You can view subscription options here.

    *a very limited number of ads contain special coupon deals for our members and will show

  • Community Hive Community Hive

    Community Hive allows you to follow your favorite communities all in one place.

    Follow on Community Hive
  • Similar Content

  • Posts

    • It seems like you can't wipe your behind these days without getting a survey sent to you. Then, when you get around to responding to it, it has stale dated.
    • Damn, sorry about that. I've been job hunting this whole year, fairly passively. But I was recently offered a team lead position, but I have to pass a few tests, so I'm studying for those.  I've had a bunch of phone interviews and a few actual interviews (Anheuser-Busch, Boeing, and Worldwide Technology). Now that I've been offered the Team Lead position, I've stopped looking. I mostly just feel like I'm more valuable and "should" be making more money. With them offering this, I definitely feel like they know I can handle it and want me around. 
    • WOW, that SUV could so easily be a Buick too with the headlights / daytime trim lights.
    • Lately, there has been a trend in the large crossover segment to replace naturally aspirated V6es with engines containing two fewer cylinders and some form of boost, either turbo or hybrid, sometimes both. The Infiniti QX60 is the latest model to join the trend. For 2025, Infiniti is switching the QX60 to its 2.0-liter Variable Compression turbo-charged engine, also found in the QX50 and QX55. The engine produces 268 horsepower and 286 lb-ft of torque. This represents a drop of 27 horsepower but an increase of 16 lb-ft of torque over a broader engine speed range. The QX60 retains its 9-speed automatic and gains a transmission fluid cooler, bringing the tow rating to 6,000 lbs for every trim. Like the V6 before it, the 2-liter VC-Turbo runs on premium fuel.  The new powertrain slightly increases fuel efficiency to 22 city / 28 highway / 24 combined over last year's model specs of 20 city / 25 highway / 22 combined for front-wheel drive models. Compared to front-wheel drive, all-wheel drive models lose 1 mpg highway. The most direct competitor to the Infiniti QX60, the Buick Enclave, also moved to a 4-cylinder turbo for 2025, and we expect others in this segment to follow suit. View full article
    • They have lockable boxes you can mount the charger in.  I agree that there's no rush to get the charger, but if you're already doing construction work inside, run at least any conduit or wiring needed now and leave it disconnected.    I found out about 30 minutes ago that I didn't get the job.  Back to the drawing board, I guess.  I hate job hunting.
  • Who's Online (See full list)

    • There are no registered users currently online
  • My Clubs

  • Create New...

Hey there, we noticed you're using an ad-blocker. We're a small site that is supported by ads or subscriptions. We rely on these to pay for server costs and vehicle reviews.  Please consider whitelisting us in your ad-blocker, or if you really like what you see, you can pick up one of our subscriptions for just $1.75 a month or $15 a year. It may not seem like a lot, but it goes a long way to help support real, honest content, that isn't generated by an AI bot.

See you out there.


Write what you are looking for and press enter or click the search icon to begin your search