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New 4 stroke engine efficiency

  1. Jun 26, 2010 #1
    The new issue of the mechanical efficiency of the new 4 stroke engine.

    What will have the efficiency of the engine, which increases its volume swept by two times slower rotating crankshaft- piston systems ??
    Two times slower or inertia four times smaller.

    Regards Andrew
    Last edited by a moderator: Jun 29, 2013
  2. jcsd
  3. Jun 27, 2010 #2


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    Those two top pistons seem to be performing the function of the valves in a normal engine. What is the purpose of the 'extra' volume which the main piston doesn't sweep? Wouldn't conventional valves do a better job because they can be operated by a cam which can profile the timing much more flexibly?
  4. Jun 27, 2010 #3
    Since we are the forum about engineering, it presents my project without differential modes. Maybe it to work completely without oil lubrication, bearings must have just closed lubrication grease.

    Regards Andrew:biggrin:
    Last edited by a moderator: Jul 5, 2011
  5. Jun 27, 2010 #4


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    Sorry but I don't see the relevance of that post. Is it an internal combustion engine?
  6. Jun 27, 2010 #5
    No, it's above my new differential.

    But I still have a new engine, which is, for example, 16 "cylinder" and only one rod and a shaft crank.

    Here, too, inertia is much less than in the traditional engine .Here, too, inertia is much less than in the traditional engine

    Regards Andrew
    Last edited by a moderator: Jul 5, 2011
  7. Jun 28, 2010 #6

    jack action

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    I just love the imagination you have!

    I have to say that I see more potential in the first engine than your second.

    The first one, I see it as a valveless 3-cyl engine. You consider the 2 top pistons as valves, but there not. They are regular pistons that will extract power just like the "master piston". The big advantage of your design is that you have removed a big piece of the typical engine: the cylinder head. The biggest disadvantage seems to be the shape of you combustion chamber which seems to have a surface-to-volume ratio too large. Having the 2 "valve" pistons too large will hurt the combustion (Too much surface cools the fuel mixture too fast, leaving an incomplete combustion). Maybe having 2 spark plugs would be better too (You have 3 cylinder after all!).

    As for the second one, the only advantage over traditional engine would be that you are using both side of the piston to extract power. So you are probably right by saying that it will have less inertia for the same amount of power. But the big disadvantage is the same one as any rotary piston engine: sealing the combustion chamber. Those long and straight seals, plus the ones you will need to seal the edges are difficult to make such that exhaust gases, fuel mixture and lubricant are separated efficiently.

    Definitively, keep working on the first design.
  8. Jun 28, 2010 #7
    Thanks, will attempt to maintain your interest

    Because it draws more than speak English a little bit the next drawing.
    Version of the timing piston-called 'Twin Feliks" . :rolleyes:

    Best Reegards Andrew
    Last edited by a moderator: Jul 5, 2011
  9. Jun 29, 2010 #8
    Not enough space on the drawings.

    Best regrds Andrew
    Last edited by a moderator: Jul 5, 2011
  10. Jun 29, 2010 #9
    You've posted these somewhere before, haven't you? (either that or i'm having a major case of deja vu). F1technical iirc.
  11. Jun 29, 2010 #10
    O yes indeed, on the F1 was a little discussion.
    But here is a forum Physics and proposing discussions on efficiency.
    So how is a chart idykatorowy P-V to the mass inertia of the engine.
    Because certainly the sum of these two dependencies gives a more true knowledge of the efficiency of the engine. As you can see some examples, using completely different mass inertia can receive an equal volume of a working engine .

    And called "Stephenson second " steam engine :rolleyes:

    Regards Andrew
    Last edited by a moderator: Jul 5, 2011
  12. Jul 6, 2010 #11



    all are diesel engines, .

    Regards Andrew:tongue:

    Attached Files:

  13. Jul 9, 2010 #12
    However, you may return to discussions about new4stroke.


    Daniel , CH physicist elegant describe efficiency:

    ------------------- Mass - RPM - inertial forces----intake cm^3--- intake/inertia
    1 main piston --- 2 ------ 2 ---- 2 * 2^2 =8 ------- 600 ------ 75
    2 valve pistons - 2*1 ---- 1 --- 2 * 1 * 1^2= 2 --- 360 ----- 180

    ===> intake / inertia is better for valve piston than main piston.
    Of course in sensible borders .

    Engine new 4 stroke has changeable compressio ratio.
    It's up to the angle of coupling with the main piston .

    Graph some varations:

    Minimum combustion chamber volume, inside is not exactly 360 degrees, only a few degrees later


    These geometric changes should be reflected in the new chart, the indicator P-V

    Regards Andrew:smile:

    Attached Files:

  14. Jul 13, 2010 #13
    Additional adwantages of the engine, which should take account of the calculation of the efficiency:

    And now about the most important advantage of my engine
    This structure how, higher I demonstrated the graph, has the different degree of compress ratio on placing angles between two crankshafts .
    The changeable compression ratio was applied in a few advanced different structures of special engines .
    He has most often been carried out with the help special Biceri pistons.


    and these are virtues from using it :



    In my structure exceptionally it is easy to carry out such a changeable compression ratio. He is carrying out sie it behind the help very of straightforward device for the picture. And most important: this device is changing the compression ratio in all top hats of the given engine(even for example 16 cylinders).
    It is very much cheap way, and simultaneous in the reliable way is carrying out all described higher virtues of the changeable compression ratio.

    Some others:http://www.fs.isy.liu.se/Lab/SVC/" [Broken]


    Regards Andrew:smile:
    Last edited by a moderator: May 4, 2017
  15. Jul 19, 2010 #14

  16. Jul 19, 2010 #15


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    Where did you get your efficiency numbers from? Your steam turbine number looks a little low and your gas turbine numbers are about half what is typical.
  17. Jul 21, 2010 #16
    This is also the book Profi


    Regards Andrew:smile:
  18. Aug 3, 2010 #17
    Well, who would have thought that Newcomen was so close to an adequate solution :rolleyes:



    Regards Andrew :biggrin:
    Last edited by a moderator: Apr 25, 2017
  19. Aug 11, 2010 #18

    I also very close to the Technology

    Regards Andrew :biggrin:
  20. Aug 11, 2010 #19
    I think that this technology is very effective. Can you imagine that by doing the same movement up and down through the traditional piston-connecting rod-crankshaft to get the same ease the movement of this vehicle?
    I think that it would then be much harder work. And these four , the looks on it, they not liked to work more than need....

    Can you feel it ??

    Regards Andrew:smile:
  21. Aug 14, 2010 #20
    However and that will had such a good humor, just take a timber and a little grease lubricated.:rolleyes:

    Do not need any oil !! :biggrin:

    Seal or Teflon or lubricated with diesel fuel.

    OIl = diesel fuel in this picture


    Regards Andrew:smile:
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