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Focus Applied Technologies“EZ Dyno” ManualREV 6EZ pull Dynamometer program is designed to be a simple interface for dynamometer testing and tuning ofall types of vehicles. It works with our Motorcycle, Automotive and Heavy Duty Vehicle chassisdynamometers, allowing various ways to control the load, as well as collecting and displaying data fromthe dyno and vehicle.An on-line tutorial covering this software is available at “ezDyno Monitor Tutorial”:https://www.youtube.com/watch?v iylz2doeOK8TUNING:When tuning, you can use Manual, Speed or Road modes to load the vehicle. Just click on the type ofloading you need, and adjust the corresponding parameters.In MANUAL mode enter the % load, or click the /- to increase/decrease loadingIn SPEED mode enter the target speed (either DYNO or ENGINE)In ROAD mode the dyno increases load with speed, mimicking the vehicles road performance.If the road load calibrations are set correctly, normally you would use 100% Road Load. To simulate alighter load, use 80%, or more than 100% for heavy loads (eg. 120%). Road Load is often used for testinggear changes, and time to a given speed during acceleration.Tuning LoadingIn MANUAL mode you can quickly increase/decrease the load by hitting the /- buttons, or zero the load byhitting the “0” button.
Dyno pulls are “Wide Open Throttle” acceleration tests used to measure power, torque and usually theAir/Fuel Ratio of your engine during hard acceleration. The pull should last for 10 to 20 seconds to get bestresults. This can be done with no load (an inertia only pull), 2-point loading (has a start rpm and load andstop rpm and load), or acceleration loading (uses start rpm and load, then adjusts load to achieve constantacceleration).SETTING UP CONTROLLER TO PERFORM PULLS:“Tare” load cell reading (or double click on the TARE button to automatically TARE)Select Gear, and spin up rollerClick “RATIO” and set gear ratio (if using Calculated Engine RPM)Return engine to idleClick ENGINE/DYNO button to select RPM referenceSet desired START and STOP RPMsSet Start and Stop LOADS to just hold engine at 80% throttleSet target Acceleration (STOP rpm – START rpm) / 15Click on “Acceleration” Pull LoadingPull ParametersNotification WindowPERFORMING PULLS:Select Vehicle ID (license plate number or other) and File DestinationSlowly open throttle to wide open at the start speed“Instantaneous” graph will automatically show up if the Instant Pull Graph box is tickedHold throttle Wide Open following instructions in the notification windowWhen at redline, or instructed to close throttle, reduce throttleTo view results and compare/print click on the GRAF button
There are several AUTOMATIC options used when performing pulls:LOAD: This will increase or decrease the load as required to maintain a reasonable pull durationSAVE: When this is ON the file will automatically be saved with the given vehicle ID and run numberGRAF: When this is ON the large graf will automatically be opened at the end of the pull.INSTAGRAF: When this is on an “instantaneous” graf will show up during pulls/.These options are turned on/off by clicking the button. They are ON when the button is GREEN.GRAF: Graphic Results DisplayTo view the large “Pull” graf, click on the GRAF button.Click on file name buttons to load existing files, and select X and Y axis parameters from the SETUP menu.“Hover” over graph to seeindividual point numbersClick on the plot area to getstatistics from that pointYou can click on the Namebuttons to load existing pull filesSaving the DataYou can save the graf the JPG button (prints it to a file), REPORT (sends it to an Excell spread sheet) or thePRINT button (prints to a printer).Graf setup parameters (what data to plot, 1 or 2 graphs, grid size and etc) can be accessed by hitting theSETUP button.
CALIBRATIONSTo properly calculate the vehicles power the calibrations must be set to the correct values. Most problemswith power calculations are related to incorrect calibration values. The dynamometer Roller Diameter andInertia are the most critical. Next is the Friction, however if the inertia is properly set, the friction can beautomatically calibrated. You can also set up the calibration for practically any sensor connected to theAnalog Inputs, and many other parameters of interest.Dynamometer Calibrations can be accessed by hitting the Calibration button.NOTE: Friction can be calibrated only once the Inertia is correctly set.To calibrate friction:Tare the load cellSpin up the dyno to a high speed (typical speed encountered during testing)Click on the AUTO friction button (and OK on the confirmation box)Clutch the vehicle (or place in neutral) and allow the roller/wheel so spin freely to a stopThe new friction parameters will be presented in a confirmation box.TYPICAL CALIBRATION NUMBERSFRICTIONOffset: 4Nm Factor: 0.002 Nm/rpmQuad: 0 Nm/rpm²Dyno Inertia: 1.3Roller Diameter: 0.165mMax RPM: 8000Max Torque: 250NmEngine Inertia: 0Gear Ratio: 3 (varies depending on what gear used on vehicle)Friction CalibrationsController Calibrations AccessRemote Control SettingsBreaking CalibrationsChannel SettingsEach “Channel” has a label, units and linear calibrations (offset and factor). For scaling purposes there is aminimum and maximum value that can be changed, and a filter value for smoothing out the fluctuations.Filter value of 0 gives no filtering, 0.5 is slight filtering, and 0.9 is heavy filtering. Major and Minor numberof ticks on the dial gages can be set, and the number of digits to be displayed (for example F2 or N2 for 2digits to the right of the decimal point).Common Analog Channel CalibrationsDEVICE NAMEINNOVATE Motorsport AFR MeterAEM AFRFocus ThermistorUNITSAFRAFR COFFSET7.357.3125-27.6FACTOR (U/V)3.012.375135 (approximate)
To change the controllers internal calibrations, you can click the Controller Cals button.PPR are the “pulses per rev” of the dyno, or RPM2Torque Averaging of 50% is normal. Use 80 for greater averaging of displayed number (on controller)Torque Decimal places can be set (0, 1, 2, 3 or 4)PID Tuning:TYPICAL NUMBERSKp: 100 Fp: 200Ki: 2Fi: 400Kd: 200 Fd:10Road Load Tuning:TYPICAL NUMBERSKf: 10Ka: 14000Km: 0Torque Calibration:Set Ki, Kd to zreoAdjust Kp for good convergence, with 50% overshootIncrease KD for 10% overshoot.If Kp, I or d is 200, then double the F parameter, and halve the K parameter(eg. Kp 220, Fp 1000 change to Kp 110, Fp 500)From the main screen set the Road Load % to 100Set Kareo to 20000 and Kmass to 0Adjust Kfrict to get the correct low-speed throttle (20kph) on dynoAdjust Kareo to get correct high speed throttle (100 kph) on dynoAdjust Km to get the correct acceleration time (20 to 80 kph)Place Calibration Arm onTARE the readingPlace Weights on the cal armEnter the appropriate Target Torque and hit SETRemove weights and re-tare to checkSpeed Signal Trigger Levels: Normally this will by 0.5 for the lower level and 1.0 for the upper levelUpper and Lower levels can be adjusted to give best RPM stabilityIf a trigger level is too high or low, the RPM will be 0 even with a signalSpin the rollers or run the engine with speed clamp to view RPM numbersSEND the parameters to the controller to test out.BURN them to the controller when you are happy with the results.
ENGINE TUNING WITH THE “TUNE BUDDY” SCREEN:To get the “Tune Buddy” tuning assist screen, click the TUNE button on the main screen. You will then havea second window open that has 3 grids, each with the same coordinates, usually X Engine RPM, Y Throttle (or MAP) and Z (the displayed item) is Air/Fuel ratio:TARGET: This is the target AFR. It can be set by entering a number in the upper left box and hitting “SetTarget To” button. If you want different target values in different cells, you can Export, edit and thenImport the map.MEASURED: This is the actual measured average AFR for each cell. The averaging exponent is labeled asthe Acc. Factor (accumulation factor)Correction %: This is the relative change required in the fueling map of the engines ECU (Electronic ControlUnit)As you change the operating condition the light blue highlighting indicates what cell you are operating in.You can observe the Measured and Correction values change while you run.The Current cell value, Target value and Correction value for the current cell are displayed on the rightside. Corrections can be reset by hitting the “Zero Corrections” button.You can edit the Tune display configuration with the Configure button:You can select the variable for the X axis, Y axis and Z, as well as the number of bins in the X and Ydirections, and their step size. These parameters are saved in the Tune Configuration file.
REMOTEA remote is available which has 3 to 5 buttons. This is connected to any one of the Analog inputs. TheRemote functions need to be turned ON via the Calibrations Remote section:The first button puts the dyno in BREAKING mode, applying a load specified in the Breaking section of theCalibrations. BREAKING mode can be toggled ON/OFF with this button.The second button is the LOAD button. The Load can be toggled ON/OFF using this button.The Third button is the CONTINUE button. This is used to SAVE files when the Save file dialog box is open,or to EXIT the Graf when it is open. This allows you to continue testing without having to click the mouse.For more information contact:www.FocusAppliedTechnologies.com
TYPICAL NUMBERS Set Kareo to 20000 and Kmass to 0 Kf: 10 Adjust Kfrict to get the correct low-speed throttle (20kph) on dyno Ka: 14000 Adjust Kareo to get correct high speed throttle (100 kph) on dyno Km: 0 Adjust Km to get the correct acceleration time (20 to 80 kph) Torq
