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Recent content by RodRico

  1. RodRico

    Solidworks flow simulation - Rotating region within rotating region?

    Particleworks looks very applicable to what I'm doing, but I imagine it's quite costly, right? I'm an individual inventor using Solidworks because I get the Professional suite for only $20 a year under their veterans program. I can certainly afford more than $20, but I usually find I can't...
  2. RodRico

    Astonishing claims.... what do you think?

    I went down that rabbit hole early on only to discover that the limitation is not the melting temperature (or reduced strength at temperature) of the metals but the breakdown temperature of the lubricating oil. Conventional oils are good to about 300F and mainstream synthetics are are good to...
  3. 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...
  4. RodRico

    Constructive Feedback Solicited...

    Someone pointed me to the excellent "Cam Design Handbook" by Harold A. Rothbart. I found the 2004 edition online. Chapter 6, "Elements of Came Profile Geometry" addresses pressure angle thus: Below is my cam with the new rolling follower piston (with and without the cylinder liner) and the...
  5. RodRico

    Constructive Feedback Solicited...

    Granted, but most of that oil does nothing but create loss. As you well know, the only oil that matters is the thin film between the follower and the cam. I'm still encouraged by a reputable company driving so much torque through cams with such high mechanical efficiency.
  6. RodRico

    Constructive Feedback Solicited...

    I'll be overjoyed to see it run as expected for 10 hours as a first step! Seriously, though, durability worries me too. If I find I must make the cams less demanding, I'll run it at 5,252 RPM rather than 2,626 and reduce cycles per revolution from four to two. If I can't attain durability, I'll...
  7. RodRico

    Constructive Feedback Solicited...

    Solidworks Flow Simulation (CFD) allows multiple rotating reference frames, so I should be able to model the cam interface in a limited fashion. I'll post results once I have them (assuming I can get it to work).
  8. RodRico

    Constructive Feedback Solicited...

    Good question. There's unavoidably oil on the track, and it piles up on the leading edge of the roller (at the lower right) where it meets the track. There will also be oil on the trailing edge (at the upper left) of the roller where it enters the bearing, but much less due to the geometry and...
  9. RodRico

    Constructive Feedback Solicited...

    I'm using social media for the peer reviews I used to have with my team, and I haven't been able to go public with each design iteration until the applicable patents are granted. I did one round of review when the first patent issued, incorporated a number of revisions based on discussion and...
  10. RodRico

    Valve spring oil cooler?

    I just filed a provisional as a micro-entity on my injection system for $75. I have to file a regular utility patent within a year which costs $755 insofar as there are 3 or less independent claims and 20 or less total claims and I don't have too much back and forth with the examiner. The...
  11. RodRico

    Constructive Feedback Solicited...

    It is a bit complex, but perhaps not as bad as it looks given the internals of the fuel pump and injectors are shown (which isn't common in an engine illustration. Sorry, I thought everyone here was already familiar with the engine concept and was just soliciting comments on the new fuel...
  12. 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...
  13. RodRico

    Valve spring oil cooler?

    I was going to mention that Mopar and KE Performance sell valve covers (or devices that sit under the cover) with integrated valve spring oilers that direct a spray onto each individual spring. I didn't because a spray device like that needs pressure, and folks should be very careful about...
  14. 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...
  15. RodRico

    Astonishing claims.... what do you think?

    My thoughts exactly. The common "layman science" that compressed gasses are like muscles that waste energy by exerting themselves when the lever is in the "wrong" position is misguided. Engines run on gases, not muscles, and as long as they have good ring seal, there's very little lost...
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