Self-learning piggyback(software)?
05-02-2005, 05:27 AM
#1
Pro
Thread Starter
Self-learning piggyback(software)?
As far as I know, there is no self-learning piggyback available. Is someone smart enough to write some software which can learn fuel curves for closed loop mode?
My Zeitronix can supply the AFR, RPM and the optional User Input for the Voltage measured by the MAF (or stock AFM).
When you replace the PiggyBack with a laptop and drive a while it should be possible to let the software on the laptop calculate the best fuel curve. After the software is done calculating you can export the correct values for your piggyback software or enter it manually.
Is a laptop capable of sending a Voltage through its serial port?
The idea sounds great doesn't it.
My Zeitronix can supply the AFR, RPM and the optional User Input for the Voltage measured by the MAF (or stock AFM).
When you replace the PiggyBack with a laptop and drive a while it should be possible to let the software on the laptop calculate the best fuel curve. After the software is done calculating you can export the correct values for your piggyback software or enter it manually.
Is a laptop capable of sending a Voltage through its serial port?
The idea sounds great doesn't it.
05-02-2005, 07:46 AM
#2
Pro
Thread Starter
I was thinking of the following setup:
Hookup the laptop to the system start the software and disconnect the stock O2 sensor to prevent the DME to adjust the fuel mixture.
Drive (cruise) until the software doesn't have to adjust the injected fuel amounts and use the Voltages acquired during this process to program your piggyback.
Hookup the laptop to the system start the software and disconnect the stock O2 sensor to prevent the DME to adjust the fuel mixture.
Drive (cruise) until the software doesn't have to adjust the injected fuel amounts and use the Voltages acquired during this process to program your piggyback.
05-02-2005, 09:23 AM
#3
Banned
It's really not that hard to dial in a good fuel curve with today's piggy backs. The problem is that tuning wot on the street is not safe for anyone. Dyno tuning is the way to go. multiple runs in a safe environment. The self tuner you suggest is a good idea and has bin brought up before. Stand alones are not even capable of this yet. Dme,s that are equipt on stock vehicles offer this tunability already. The problem is that they are driven passed there limits so some kind of piggyback is needed to fool it.
05-02-2005, 10:20 AM
#4
Addict
Rennlist Member
Rennlist
Site Sponsor
Rennlist Member
Rennlist
Site Sponsor
Many standalone systems will build the fuel maps for you based on your AFR requirements. I'm working with a PB that is supposed to do the same, yet to test this feature.
Basically, you set a target AFR/RPM and/or LOAD. The standalone attempts to modify the injectors duty cycles to get the desired AFR. The PB alters a signal for the same reason.
Basically, you set a target AFR/RPM and/or LOAD. The standalone attempts to modify the injectors duty cycles to get the desired AFR. The PB alters a signal for the same reason.
05-02-2005, 11:17 AM
#5
UAE Rennlist Ambassador
Rennlist Member
Rennlist Member
The street may not be safe, but it is the best way to adjust the AFR's. The car is exposed to the environment, the wind, the intercooler, radiator etc.....all give the car "real world load" as opposed to the dyno.
The track is better suited for this, since it is a better controlled environment.
The track is better suited for this, since it is a better controlled environment.
