INTRODUCTION— Dynomation-5 Evaluators Form, 07/01/08, for version 5.03.0528
Please refer to the Dynomation-5 Users Manual for detailed program and simulation help.
The following paragraphs provide an overview of the major enhancements added to Dynomation-5 within the last few months and offer brief instructions on their use:
1) New Rollup Menus:
Dynomation-5 uses a new component menu system. Try clicking on the Title Bar of any category. If you left-click a Title Bar, the category will “rollup” into just the title bar, giving extra room for other component categories on your screen; left-click again to restore the category. If you right-click on any Title Bar, you’ll see a menu that lets you quickly configure just the categories that you want to see. You can also quickly rollup or down all categories.
2) Wave-Action and Filling/Emptying Simulation Integration:
The integration between the WA (wave-action) and FE (filling and emptying) models has been improved, especially in intake manifold selections. Previously, induction models in the WA sim were somewhat limited, however, now when you select any intake manifold, the characteristics of that manifold will be included in the analysis of induction airflow and cylinder filling for both the WA and FE sims. While the manifold choices are “generic,” they provide essential feedback on how runner and plenum configuration affect power, in both the WA and FE sims.
In addition to intake-manifold integration, the FE and WA now share the new combustion modeling, including chamber type, fuel type, ignition advance, air/fuel ratios, compression ratio effects, and more. Additional information on the new Combustion Category is provided in 6, below.
While the FE model is not as accurate at the WA model, it performs a full simulation in a remarkably short time while still maintaining a very high degree of accuracy. Don’t ignore the modeling capability of the FE to get to you “close,” then use the WA to do a fully detailed analysis. To exploit the high speed of the FE model, Quick and Full Iterative testing is provided for both the FE and WA models (see the User Manual).
3) Environmental Input:
Dynomation-5 includes models for various environmental conditions that will help you duplicate real-world performance results. Previously, all test results assumed the engine was operated at STP (Standard Temperate and Pressure) conditions of sea-level altitude (with standard barometric pressure), 68-degrees F ambient temperature, and 0% humidity. These conditions are still in effect in Dynomation-5 by default, however, you can alter any of these environmental conditions and measure their result.
The changes in environmental variables are applied to the sim through a “correction factor.” This value is normally calculated by the sim, however, you can click “Manual Entry” in the simulation category and directly enter any correction factor you wish.
4) Induction Category Changes:
Dynomation-5 makes the plenum manifold vs. independent-runner plenum selection automatically based on the type of Intake Manifold that you have selected. The plenum model currently being used by the sim is shown directly below the Intake Manifold Type in the Plenum Configuration field. This is a read-only field and can be changed only by selecting a different manifold (all independent-runner manifolds are located under the Independent Runner choices in the Manifold Type component menu).
Runner configuration (Length, Beginning Area, Minimum Area, Taper Angle) are still WA-only data fields (only the WA model can resolve wave dynamics).
Forced Induction is now active in both the FE and WA models. But before you celebrate, we must add that the modeling is not yet complete for high positive pressures in the WA model. We believe it is reasonably accurate for low boost pressures (below 10psi), but at higher pressures you may see some instability or erroneous power predictions. We are working on solving this, and as soon as the model is complete, updates will be automatically distributed to all Dynomaiton-5 users via the Motion Automatic Updater, first installed with this beta version (Note: The Automatic Updater is not fully functional in this beta release).
5) Camshaft Category and Rocker Math Box:
The Camshaft Category in Dynomation-5 was reorganization to better position the fields based on the fields that lie directly above and below. For example, if you follow the Gross Lobe Lift down to the Net Valve Lift on the left side of the Camshaft Category, it more resembles a simple “math problem.” Gross Lobe Lift is multiplied by the Rocker Ratio to find Gross-Valve-Lift displayed in the field, below. Then Valve Lash is subtracted from Gross Valve Lift to determine Net Valve Lift.
A new addition to the Camshaft Category is the Rocker-Math button and dialog box. To use this new tool, enter the basic “manufacturer” cam specs FIRST in the Camshaft Category, THEN open the Rocker Math box to enter CHANGED values to determine how these changes affect not only valve lift, but duration and individual valve-event timing. If you have not “played” with these concepts, you will probably be amazed how much of a difference a few thousandths of lash can make in valve duration and timing.
Lift Acceleration Rate, a measure of how fast the valve opens, is now better modeled in the WA simulation. In addition, we have extended the range from the previous 1 to 6 (with 1 being a very mild cam, to 6 for an all-out aggressive drag-racing cam) to 1 to 7. The additional high-end value accommodates the amazing acceleration that some new cams are able to achieve (possibly at the expense of the rest of the valvetrain!).
6) Combustion Category:
Dynomation-5 includes several new, powerful combustion models. They are all grouped together in the new Combustion Category. These include combustion-chamber shape, ignition timing, timing-advance curves, and improved Compression-Ratio modeling. The combustion models take many factors into consideration to determine ignition-timing requirements and simulated power. Some of these are: Chamber shape and its effect on burn rate, the burn-rate of various fuels, compression-ratio and its effect on turbulence and burn rate, the effect of non-optimum ignition timing, the effect of air-fuel ratio, and several other similar factors.
The Camber-Timing-Requirements field displays the ignition-timing, or “lead” required, based only on the turbulence and burn rate of the chamber with gasoline as the fuel. This value does not include additional ignition lead due to engine speed, etc. Use this value, simply, as a relative comparison between chamber types. Rarely would ignition timing be exactly this value, except at very-low engine speeds.
To allow the simulation to produce peak power, check the “Estimate Ignition Timing” checkbox. This will calculate optimum ignition timing and maintain peak power throughout the rpm range. The optimum ignition timing values can be viewed in the ProData Chart (click on the ProData tab at the bottom of the right-hand pane). You can also graph advance curve timing points on the top, rpm-based graph by assigning either the Y1 or Y2 axis to Ignition Timing (right-click the graph and re-assign axis variables).
7) Graphs & Tables:
The graphs in Dynomation-5 have been modified based on user feedback. Here is a quick overview: As is the case with the current version of Dynomation, there are four graphs in Dynomation-5; each graph can display up to two variables. That means that you can view eight different data streams at once! The graph at the top of the right pane now is the only rpm-based graph. Use this graph to view data that is based on engine speed, such as hp, torque, manifold pressure, VE, and other rpm-related data.
The moving reticule on the rpm graph sets the rpm point at which the three remaining Crank-Angle graphs focus their data. For example, if you move the reticule to 5000rpm on the top graph, then all the remaining graphs will display crank-angle data obtained while the engine is at 5000rpm.
Many have asked for the ability to see cylinder pressure and intake pressure or flow on the same graph. This is easily accomplished by setting one of the axis variables on the middle or bottom graph (on the right pane) to cylinder pressure (then adjusting the axis range to suit your requirements). New to Dynomation-5 is the fourth crank-angle plot (located under the component categories; click on the Graph tab at the bottom of the left pane). Previously this graph was an rpm-based. The graph now defaults to a PV graph of cylinder pressure vs. cylinder volume. But you can select either crank-angle or cylinder-pressure for the X-axis, as it the case for the other two crank-angle graphs.
Also new to Dynomation-5 is the Crank-Angle Sim-Data Window. Open this window from the Tools menu (in the Menu Bar). The Sim-Data window is a floating window that can be positioned anywhere on your monitor, even outside Dynomation-5. It shows both US and Metric crank-angle values taken from the crank-angle value, set by the reticule position on center or bottom graphs (in the right-pane).
To further zero-in on exact crank-angle values, a new crank-angle chart has been added. Click on the Crank-Angle tab located at the bottom of the right-pane. The chart displays crank-angle data for each 5 crank degrees of crank rotation throughout the full 4-stroke process. Remember, these values are on the rpm set by the position of the reticule in the rpm graph (top graph, right pane). These window-switching tabs are duplicated at the bottom of the left pane, so you can view tables and graphs on either side of the screen. Also keep in mind that you can move the Vertical Screen Divider, by simply dragging it to the left or right, to optimize your data displays.
8) Printing
Dynomation-5 prints exclusively through the ProPrinting feature. This is documented in the Users Manual.
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