So why haven't anyone made an engine like this? It would be the best of both worlds when it comes to torque and rpm.

So why haven't anyone made an engine like this?
It would be the best of both worlds when it comes to torque and rpm.

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  1. 2 weeks ago
    Anonymous

    >it would be the worst of all worlds

    Yes.

  2. 2 weeks ago
    Anonymous

    Audi did something simular. They made an engine with different-sized cylinders.
    https://tflcar.com/2018/06/audi-different-sized-cylinders-news/

  3. 2 weeks ago
    Anonymous

    The crank would snap pretty much

    • 2 weeks ago
      Anonymous

      you could solve that by making it a 6 cylinder engine with the large one in the middle like a pyramid

  4. 2 weeks ago
    Anonymous

    The long piston will move sanic fast while the little one will be slow so its actually the worst of both worlds

    • 2 weeks ago
      Anonymous

      That's why you run the small one at up to 20k RPM

      • 2 weeks ago
        Anonymous

        Do you just turn the big one off then?

        • 2 weeks ago
          Anonymous

          Yes

          • 2 weeks ago
            Anonymous

            Where's the mechanism for that in the OP drawing?
            Oh did you forget to put it in?

  5. 2 weeks ago
    Anonymous

    I missed troll science so much. thanks OP.

    • 2 weeks ago
      Anonymous

      I don't. It was funny at the time and we moved on. Now we laugh at people getting stuck in their burning tesla and their only way out is pull out their phones and look up their model and rip apart their door so they can pull on some hidden cables.

    • 2 weeks ago
      Anonymous

      Ah yes, the good old days.

  6. 2 weeks ago
    Anonymous

    I think a diesel-gasoline hybrid would be more feasible

    • 2 weeks ago
      Anonymous

      >diesel-gasoline hybrid
      it would be so kino

    • 2 weeks ago
      Anonymous

      Mazda Skyactiv-X

  7. 2 weeks ago
    Anonymous

    Why not just have variable lenght piston rods

    • 2 weeks ago
      Anonymous

      Variable who in the what now?
      We're going to need a drawing anon.

      • 2 weeks ago
        Anonymous

        Telescoping rod mechanism.
        Save on money by making it out of cast pot metal.

        • 2 weeks ago
          Anonymous

          Telewho?
          Fire up paint anon

    • 2 weeks ago
      Anonymous

      Didn't Nissan already do this?

      • 2 weeks ago
        Anonymous

        sort of. they did a thing with an eccentric (iirc) on the crankshaft to increase the compression ratio by pushing the piston closer to the top of the combustion chamber. pretty impressive, but it relies on electronics and could have questionable reliability in the long run. i suppose it's good enough for the average nissan driver who will be crashing their car before the variable compression ratio system ever has a problem.

  8. 2 weeks ago
    Anonymous

    Ok, serious question though... Why don't any manufacturer make cars with variable intake runners like Mazda put on the 787B?

    • 2 weeks ago
      Anonymous

      >Why don't any manufacturer make cars with variable intake runners like Mazda put on the 787B?
      Honda did for a while. K20a3 at least.

    • 2 weeks ago
      Anonymous

      They all did in the 90s, I believe many continued into the 00s, but there's NO NEED to make the length constantly variable - simply switching between two lengths achieved 90% of the result (which is what everyone does).
      I believe it has fallen out of favour because VVT makes up for most of the losses anyway.

    • 2 weeks ago
      Anonymous

      Lots of cars have variable intakes, my miata has one and so did the 5th gen maxima my dad bought new

    • 2 weeks ago
      Anonymous

      all ea888 engine variants have this. VAG has been doing it forever

    • 2 weeks ago
      Anonymous

      Audi V8s have had intake manifolds with flaps in them that change runner length since at least the early 90's.

    • 2 weeks ago
      S/ö/viet

      Ford did

  9. 2 weeks ago
    Anonymous

    It's been done. Not matter how ridiculous an idea you come up with, it has already been done.

  10. 2 weeks ago
    Anonymous

    Fixed

    • 2 weeks ago
      Anonymous

      I dunno bro I kinda get the feeling simply changing gear will be better than turning your engine into a 2 cylinder to rev out a bit longer

    • 2 weeks ago
      Anonymous

      >Sorry sir, your crankshaft clutch is worn
      >Yes that will be an engine rebuild.

    • 2 weeks ago
      Anonymous

      Why not gear up the short stroke portion instead of using a clutch

  11. 2 weeks ago
    Anonymous

    Because all the cylinders turn at the same RPM
    Dingus
    OK not dingus I thought the same thing for a while but the crankshaft is limited to the least common denominator

  12. 2 weeks ago
    Anonymous

    What about this, could use this to adjust the strong length

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