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Recent content by TStaples

  1. TStaples

    BSFC Maps

    Sam, Hemi is correct. The most recent data on today's state of the art engines is expensive to generate, and not very easy to obtain publicly. However, one of the best places to search, and you will have to do some data mining for sure, is the proceedings from the DEER (Directions in...
  2. TStaples

    metal compatibility roller rocker conversion

    If you want to take a page from the latest F1/INDY/NASCAR type valvetrain and engine tech, I would suggest either tool steel, or 52100 for both parts, and then have one of them DLC (Diamond Like Carbon) coated to provide a good bearing layer between them. Today's DLC coatings are both hard...
  3. TStaples

    Using a Previous Design

    If you can clearly use the existing anchors installation with 20 years of field service as the test data that qualifies the design, and 20 years of service meets the design criteria for the new installation, then document it that way, stamp the drawings and move along. I see no ethical issue...
  4. TStaples

    Seeking the true definition of fuel injector latency

    Pat, Your description of the terms that you would use is a great example of why we need standards. Depending on who is working on the technology, what part of the world they are in or from, and so on, there could be many different terms for the same basic concept. That's one of the primary...
  5. TStaples

    There once was a PhD . . .

    hgldr, At it's core, it's really an ego management issue. I've only seen this with "managers" who had ginormous egos that were correspondingly fragile. With the founder of one company I have worked for, I handled that type situation by doing it his way, which I knew wasn't going to work, but...
  6. TStaples

    Seeking the true definition of fuel injector latency

    Dave, I think you are referring to the linearity calculation, and then the calculation of the theoretical x-intercept (offset). I think he was just asking about the way ECU manufacturers refer to this. In my experience, it's different than how injector manufacturers normally think of it...
  7. TStaples

    Hello everyone. What can I do to become an Automotive Engineer?

    John, If you are commutable to Ventura County (Camarillo) then I urge you to apply through our website. -Tony Staples www.tscombustion.com
  8. TStaples

    Liquid Phase LPG Injector Calibration

    Rob, I should have gone back and reviewed your OP before writing the second method. The second approach I wrote about assumes you would use Liquid Propane as the test fluid. Your investigating a suitable calibration fluid indicates that you likely don't have access to a hazardous flow area...
  9. TStaples

    Liquid Phase LPG Injector Calibration

    After writing the previous post it occurred to me that a simpler method might be the following: Use a liquid flowmeter on the inlet, measure the resulting volumetric flow, covert that to mass flow, and then use the ideal gas law to calculate the resulting volume at the downstream temp and...
  10. TStaples

    Liquid Phase LPG Injector Calibration

    Robert, My background includes experience designing and manufacturing gaseous propane injectors (low pressure gaseous at the inlet). The method I previously developed to look at shot to shot repeatability on those, would also work for your measurement needs with liquid propane inlet. We set...
  11. TStaples

    Transonic Combustion - SAE Paper

    Dave, Very funny! Sorry, but one of the keys is minimizing the amount of fuel contained in the system. There just isn't much energy there. As it happens, our company is located only a few miles from Pt. Mugu, and I happened to be leaving work last night when this "thing" was streaking up...
  12. TStaples

    Transonic Combustion - SAE Paper

    Brian, You are correct. TSCi equipped engines need to be a bit more robust than today's gasoline engines, but not quite as beefy as today's Diesels. Interestingly, GDI engines are increasing in CR Ratio and beefiness, to handle the higher peak pressures of turbocharging/DI. Mazda has...
  13. TStaples

    Transonic Combustion - SAE Paper

    Eric, This is a simplistic way to look at it: Our technology enables the engine to run in something similar to HCCI mode at all speed/load points. Since we use no spark plug, there is no SI mode. As for all the other questions, those are areas we discuss in detail only with the OEM...
  14. TStaples

    Transonic Combustion - SAE Paper

    Not all GDI engines suffer from this quite like the VW FSI engines do. BMW have an oil separator that utilizes a cyclonic swirl to condense the oil, and let it drip back to the pan, instead of allowing the mist to go directly to the intake. These separators introduce other potential problems...
  15. TStaples

    Transonic Combustion - SAE Paper

    BrianGar, We are not building engines at TSC. We are focused on delivering a combustion system to the OEM's who build engines. What you are describing is an engine architectural issue on GDI and Diesel engines. -Tony Staples www.tscombustion.com
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