I found this in the source code of Megatune 2.25 (genO2.cpp)
//static double NBBv[] = { 0.00, 0.44, 0.45, 0.50, 0.51, 1.00, 5.01 };
//static double NBBa[] = { 27.0, 17.0, 14.8, 14.6, 12.0, 2.0, 0.0 };
static double NBFv (int adc) { return 100.0 * (1.0 - adc * 5.0/nADC); }
The values which are not used look good, but the formula not.
Does this mean I have to recompile the program to have correct AFR values or is an other way to load it down? Has anyone a version with correct NB AFR values?
A Narrow Band o2 sensor question
Moderators: jsmcortina, muythaibxr
Max78: I think you are trying to set it up as pigga did, using a narrow band sensor with the wideband algorithm. I played with this a little after pigga pointed it out, and I was not very happy with it either.
I did not notice that the curve was all that far off, when running in steady state and the tune was right on it seemed to work ok. When I went lean (even just a miss) it would enrich it all the way, and not recover well, causing problems. I am much happier with the NB algorithm where I can control how quickly it responds.
MT will let you specify a pair of points to generate a 'curve' from, but I suspect that is not what you want. I don't know what you need to compile MT, but I know that compiling ms2extra is a snap. Can you just change the default table to your liking?
I did not notice that the curve was all that far off, when running in steady state and the tune was right on it seemed to work ok. When I went lean (even just a miss) it would enrich it all the way, and not recover well, causing problems. I am much happier with the NB algorithm where I can control how quickly it responds.
MT will let you specify a pair of points to generate a 'curve' from, but I suspect that is not what you want. I don't know what you need to compile MT, but I know that compiling ms2extra is a snap. Can you just change the default table to your liking?
Maybe try the wideband algorithm. (there are more options then NB...)
But it would be great to have the correct AFR/Lambda readings in Megatune for tuning.
In Megalogviewer it works after I have changed a file.
I like to use the table switching with a hardware switch, but it doesn't work. I have bridged JP4-pin10.
The pin works if I set for launch controll, but not a table switching.
I don't get a other pin working for table switching. (Beta 21)
But it would be great to have the correct AFR/Lambda readings in Megatune for tuning.
In Megalogviewer it works after I have changed a file.
I like to use the table switching with a hardware switch, but it doesn't work. I have bridged JP4-pin10.
The pin works if I set for launch controll, but not a table switching.
I don't get a other pin working for table switching. (Beta 21)