Q&A Forum
@aslot, check Advanced Gear ratio setup. You may accidentally have turned on the Primary driven wheels option. This option is used when you have a 4WD roller setup and want only one set of wheels to calculate the engine RPM (i.e. for cars that are primarily front of rear drive, 4WD "light")
Tuners,
Minor update, version 3.2.74:
- Higher RPM update rate for slow spinning rollers
- Load Control brake mode was made smoother when transitioning from stabilization period to sweep
Cheers!
I have a 2WD HUB dyno and I can´t get RPM1 to work in 3.2.74 or 3.2.75. Only RPM2 works and the engine RPM is not correct... If I change back to version 3.2.59 RPM1 and RPM2 both works and engine RPM is correct.
Is it possible to add RPM1 and RPM2 for viewing in the graph window? I can only select brake1 and 2. (In 4WD version it should also be possible to view 3 and 4)
Haven’t saved, or checked which run it was exactly. Going to use the dyno tomorrow so will see if it happens again.
in short, sometimes it doesn’t add the retardation data. Think it only happens when using stored retardation data.
Then when I apply a bit of smoothing (ctrl+selection) to a part of the graph, it then suddenly adds it
@tutuur, The graph and max numbers follow each other, since the max numbers are created from the graph. You can choose to run with and without retardation and also whether to use stored or new retardation. I need a bit more details here to understand.
Send me a log file and your saved config file, I will take a look. Also, let me know which version you run.
@Jostein
Quite regularly yourdyno won't add the rolling resistance values to the graph and/or max numbers.
It will display a low number as max, sometimes the graph is good, sometimes not. When I then apply a bit of smoothing to a part of the graph all of a sudden everything returns to normal.
Hi @madswp,
The PID algorithm has been the same for a long time, maybe a year or so. If you want to check you can download previous versions by changing the version number on the download link. You will need to uninstall the current version first. If you reinstall an old version it will read those old settings.
You may want to run a bit of Kd, that helps also for Eddy brakes if you have trouble finding a suitable setting.
Another mode which is nice if you struggle with stability is Load control. Did you try that?
For the brake mode you ask for, it is possible today. Make a RPM vs Time curve with stops at the RPMs you are interested in. So ramp-steady-ramp-steady, etc. You will need to look at the results in the Results vs Time window.
Hello Jostein
Within the last couple of months i have had trouble stabilizing my retarder brake, when using "power sweep" option. I have used this function for years now, but something has changed in software so system i unstable lately. i have tested P and I values from 0,05 to 4, and standing several hours at dyno without getting it under control. Either slow reacting brake or heavy oscillations. Justein - has something been changed in power sweep or PID control within the last couple of months?
I can use "brake sweep" which is an okay method for tractor dyno. But often after reaching maximum torque, this method will brake down engine very fast, and in some cases stall engine. When end rpm has been reached, then it also takes a few seconds before turning off brake. This is the cause of engine stall. When rpm is dropping fast then moment of inertia also have a huge impact on measurement.
And last a request: Tractor dynos often use another way of measuring power than yourdyno provide. I know this unit is rarely used for tractordyno but here my request for feature updates: Goal is to make a complete power+torquecurve with steady state measurement. Make an option for start rpm and stop rpm. And also rpm interval for measurement point. And last how many seconds brake will keep steady state rpm control at each point. This way a measurement will be made at each 25rpm (or desired) from max to low rpm. At 2 seconds steady state measurement point then average value must be used. This method will eliminate the moment of inertia completely. Since i am dynoing heavy diesel engines, the moment of intertia will be different at each measurement.
Tuners,
Minor update, version 3.2.74:
- Higher RPM update rate for slow spinning rollers
- Load Control brake mode was made smoother when transitioning from stabilization period to sweep
Cheers!
Hello Jostein,
any chance to get back the power correction factor on the result page? Or it could be optional selectable,as some may not want to see it.
Do you plan to add another correction factor option,like the DIN70020?
Thank you!
Yes, I agree, it should be possible to see the correction. I will add it as an option. The correction is stored in the .csv file when you save it, so it is present.
And DIN can be added too easily, I will do it.
Tuners,
Minor update, Version 3.2.73:
- Fixed bug that would show the Pulses per revolution for trigger wheel 1 also for Trigger wheel 2 when going into the RPM Setup window. Gear ratio calculation was still correct when the number of pulses was entered, but you had to enter the pulses per revolution each time you wanted to do a gear ratio check.
- Fixed a bug in Hotkeys for New run with stored retardation
Those of you who have turned on notifications for new beta versions will see this new version automatically ;-).
Happy tuning!
Greetings tuners,
YourDyno version 3.2.72 was released today. This is still a beta but is expected to be converted to a release soon.
Changes:
- Ability to reverse the load cell calibration, used when swapping between FWD and RWD cars
- New layout of the Run window, with quick selection for brake mode
- More hotkey definitions, now also supporting swapping brake modes
- New Update Software support. Now you can opt in or out of Beta release notification, and turn on and off reminders of new released software too
- New firmware, version 1.24. This firmware fixes a bug that could create a spike in the RPM signal very occasionally. The RPM spike software filter would remove this in almost all cases, but now the source of the spike is removed
- Proper language support for Dutch, Ukrainian, Spanish and Vietnamese. More languages in progress
Enjoy!
Note: Make sure to use the latest version of ScanTool.dll and PTH200.dll if you use these plugins. The old ScanTool.dll plugin crashes with YourDyno 3.2.68 and newer.
Yes, don't give up on the PTH200, it was just some suggestions for debugging. Let me know how it goes by mail, then when it is sorted we can post so others see the solution.
Problem solved...turned out to be a non-resistor type plug causing the issues! PTH200 all working well.
Is there a way to show wheel horsepower with a solid line? I only work with wheel horsepower but my graphs are showing engine horsepower at the moment just so I can have a solid line. Thanks, Mike.
Guys, found a bug in manual brake mode and load control brake mode on the 3.2.68. Will fix soon!
Yes, don't give up on the PTH200, it was just some suggestions for debugging. Let me know how it goes by mail, then when it is sorted we can post so others see the solution.