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  • Users: RodRico
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  1. RodRico

    Solidworks flow simulation - Rotating region within rotating region?

    I want to assess the behavior of oil in the assembly below. In the real system, the piston assembly with its roller follower rotate within the cam ring while the cam itself remains stationary. I'm fine with holding the piston and its roller follower in place and counter-rotating the cam...
  2. RodRico

    Constructive Feedback Solicited...

    I just filed a fourth patent addressing fuel injection and charge homogeneity in my engine design, particularly in small versions. Constructive criticism is welcome and is in fact solicited. This approach injects into a mixing chamber to create a rich charge (stoichiometric in the smallest...
  3. RodRico

    Another deeply flawed engine

    The whole premise of this engine is the efficiency gained by combusting in a spherical chamber, but heat transfer doesn't occur only during combustion, and this engine has a cubic chamber during compression and expansion with significantly higher surface area than a cylinder. I'm also at a loss...
  4. RodRico

    Astonishing claims.... what do you think?

    See http://velamotorcompany.com/
  5. RodRico

    Why was my post deleted?

    Does anyone know why my post about the entry of my engine in a contest was deleted?
  6. RodRico

    Achates Power Heavy Duty Diesel Program Review

    Not a lot of detail, but more than I've seen anywhere else to date... https://youtu.be/Az16WAfzZbI
  7. RodRico

    Formula 1 Simplified Math Model Attached

    I was cleaning up my engine folder after award of the last patent and found the very simple math model of a Formula One engine linked below. I built the model back in 2016 when first starting my engine design effort. At the time, I was especially interested in reconciling all the talk I saw...
  8. RodRico

    Second and Most Important Patent Granted but...

    I was just informed my second patent which captures all the lessons learned and improvements since the first patent was finally granted after a year of uncertainty. I've posted an animation and brief description of the engine on YouTube at https://youtu.be/x-w7KM_LuvM . The patent office...
  9. RodRico

    Any constructive criticism of my updated design approach?

    All, I'm now patent pending on my design updates incorporated since filing the original patent, so I can show it now and solicit critique (for those familiar with the system engineering process, the first patent reflected Preliminary Design while the new continuation patent reflects down select...
  10. RodRico

    SW 2019 FEA Accuracy, Hertzian Contact between Parallel Cylinders.

    I'm designing a cam driven engine. I do all the calculations in Excel then export the results as equations to Solidworks where I create 3D models and run analysis to confirm my Excel calculations. The Excel calculations related to the most heavily stressed cam (R1 = 0.290", R2 = 2.468", 2,768...
  11. RodRico

    Hertzian line contact in Solidworks FEA

    I'm designing a cam driven engine. I do all the calculations in Excel then export the results as equations to Solidworks where I create 3D models and run analysis to confirm my Excel calculations. The Excel calculations related to the most heavily stressed cam (R1 = 0.290", R2 = 2.468", 2,768...
  12. RodRico

    New Ring Update... Comments/Suggestions?

    TL;DR... I've decided to abandon the gapless ring concept I was pursuing, because the I don't and likely won't ever know all the variables needed to assess its viability. I came across an article from Wiseco describing thermal runaway in piston rings. While it doesn't say anything I didn't...
  13. RodRico

    Dyno Results using Standard, Filed, and Gapless Rings

    Nice article from Hot Rod Network I thought others might enjoy. Below are their dyno results using factory gapped, file gapped, and gapless rings. Factory Gap: Peak HP: 434.7 hp @ 5,700 RPM Peak Torque: 450 lb-ft @ 4,400 RPM Average HP (3,000-6,000 rpm): 363.3 HP Average Torque (3,000-6,000...
  14. RodRico

    Belleville Top Ring?

    The discussion in another thread regarding piston seals got me thinking... Why not use a single piece "ring" attached to the top of the piston that acts somewhat like a Belleville disk spring? Like a Dykes ring (my baseline), it would be pressure backed such that combustion pressure increases...
  15. RodRico

    Freakin' Patent Office

    Got an office-action from the Patent Office asserting my engine is the same as Ardezzone's (US 2017/0328277). Personally, I struggle to see how Ardezzone received a patent for what appears to be nothing more than an enclosed WWI radial. In any case, mine is an opposed-piston rotating-cylinder...
  16. RodRico

    Shouldn't modern common rail fuel systems ignite?

    Modern common rail systems run as high as 2500 bar (36 kpsi) which is equivalent to a 265:1 compression ratio. At this pressure, I would expect an air bubble anywhere in the system would auto-ignite. Do I have this right? If so, how is air purged from a newly installed injector?
  17. RodRico

    Port size and pumping loss.

    I'm adding pumping loss to my math models and have some questions for the experts. My scavenge piston does nothing but draw ambient air in then push it through the main cylinder to flush exhaust gas and load the fresh air charge for intake (fuel is only added after both the intake and exhaust...
  18. RodRico

    Great Resource for fans of internal combustion engines...

    Many folks may find the materials from USC Professor Paul Ronney's AME-436 class, "Energy and Propulsion," to be educational. He provides his lectures, problem sets, study guides, and so forth at http://ronney.usc.edu/AME436/. While the individual lectures are not available outside the USC...
  19. RodRico

    Massive Changes to My Engine Design !

    All, You may recall the challenges I was facing with installing a fuel injector in every cylinder of my engine; with a 49.5cc engine comprised of 6 cylinders, each was only 8.25cc and required a micro-fuel injector that had good enough spray pattern to yield a well mixed homogeneous fuel/air...
  20. RodRico

    CFD of a micro-fuel injector

    I'm running CFD of a micro-fuel injector using Solidworks Flow which doesn't include the fluid in its material database. I've found it surprisingly difficult to find a single reliable source for Diesel #2 properties and have been forced to collect bits and pieces from a variety of sources. Can...

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