Joe, you will have to help me out a little on the decoding...
The only issue I recall, is that when the car first starts up..EQ reads >1.00, but you are not in PE Mode..or closed-Loop..
Joe, you will have to help me out a little on the decoding...
The only issue I recall, is that when the car first starts up..EQ reads >1.00, but you are not in PE Mode..or closed-Loop..
Hey no worries, I'll like swimming in the math...
I look at those on my other PC later.
It seems that all the single channel pids that could yield a useful indicator don't work...
we might have to either use EQIVRATIO (which we already log, so it is for "free") or also use FUELSYS (which uses up 2 pid channels).
Hi Shawn,
Attached here is a new calc_pids.txt which replaces CALC.PE with CALC.CL just as we discussed today.
Edit: I found an error due to my editing skills (== should be =), so I corrected and re-attached the file.
Last edited by joecar; July 6th, 2011 at 12:46 PM.
Update: Shawn has updated the calc_pids.txt file in post #1.
@joecar, could you please rewrite
"{SAE.MAF.gps}*({GM.DYNAIRTMP_DMA.C}+273.15)/{SAE.RPM}/{SAE.MAP.kPa}*3445.2/displacement()"
with more parenthesis, right now i'm a bit fuzzy on order of operations, especially the MAF/MAT/RPM/MAP...and then is the whole thing *3445.2/VOL, or just the MAP?
or better yet put it all on one division line, so there is no confusion, like ( a * b * c) / (d * e * f)?
Hi Marcin,
It follows the usual left-to-right associativity rules...
- being the first factor places that factor in the numerator;
- * preceding a factor places that factor in the numerator;
- / preceding a factor places that factor in the denominator;
i.e. the / preceding a factor means invert the factor and multiply to the current product;
so think of a*b*c/d/e/f as a *b *c /d /e /f which is same as a*b*c/(d*e*f) or (a*b*c)/(d*e*f).
So the whole thing is *3445.2/VOL.
a*b/c*d = a*(b/c)*d
a*b/c*d/e = a*(b/c)*(d/e)
Here is an alternate calc_pids.txt file that separates DAT out as a separate pid: calc_pids.txt
This file has pids for both the Calc.VET and Calc.MAFT tutorials.
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