Calc.BEN_xxxn - AutoVE using LM2

[twadam]

Versions:
EFILive v.7.5.5
FlashScan V1
Innovate LM-2

Using AutoVE process ...

I've done some searching and have come up dry. When using the external output on the LM2 and logging it in EFILive (V1) can I use the CALC.BEN_LM12 PID even though I am using an LM2 device ? I do not see an available PID for CALC.BEN_LM22 ?

BTW - I am also logging EXT.AD2 with what seem to be appropriate Volt values. Volts are consistently between 2-3.5 v, mainly in the 2.5 area (I believe 2.45 is stoich?). The leaner values are in higher RPM/Kpa sections.

My question is related to some odd behavior I have seen after looging this paticular BEN and getting values from 1.2 - 2.5 even though I have both lean and rich conditions. I am assuming these are high based on the AutoVE tutorial. I would expect values closer to .89 - 1.2.

Or do I need to create my own calculated PID maybe by changing the formula in sae_generic for LM1 to more accurately represent the LM2 hardware ?

Any advice is appreciated.

[twadam]

So here is a little more info:

Why do I think the BEN numbers are off ? Maybe I have the wrong understanding on how this AutoVE works. I made an assumption on AutoVE based on the fact that you should be able to copy your BEN values from your map built in the scan software and then "paste->paste and multiply with labels" these values into your Main VE table. This should force your VE tune closer to a AFR of 14.7.

So correct me if I'm wrong.

My assumption:
The CALC.BEN_LM12 values being fed from the LM2 into EFILive should be somewhere close to '1' ... slightly less than 1 for rich cells and slightly greater than 1 for lean cells. (ie., an AFR of 13.5:1 in one cell would produce a BEN of .92 in the same cell on my map, which once the 'paste and multiply' was performed should yield (existing VE Value x .92) which should bring that cell closer to 14.7 AFR when logging for that particular cell. Netting a decrease in VE value. For a lean AFR value of 16:1, the BEN should be something like 1.09 (existing VE Value x .109) yielding that cell closer to 14.7 AFR when logging for that particular cell. Netting and increase in VE value.

[mr.prick]

The analog outs are programmable,
just set them the same as the LC-1 or LM-1 and log those PIDs.

[5.7ute]

As mr.prick has said program the lm-2 outputs to match the LC-1 tutorial. The lc1 output settings give a much better range over the standard lm-1/lm-2. Then just use the lc-1 pids or write your own for the lm-2.
Are you using two widebands or just the one? If using two you will need to either make a calc pid using an average value of the two banks for autoVE or use the leaner bank as your baseline.

[twadam]

Thanks for the replies!

I'm still struggling with this for some reason.

Here is what I've been digging up:

From LM-2 Manual:
Analog Output 1 is programmed to output between 0 V for an
AFR of 7.35 (gasoline) and 5.0V for an AFR of 22.39. Analog Output 2 simulates a typical narrow band oxygen sensor.

From LM-1 Manual:
As factory programmed the first output simulates a typical narrow band oxygen sensor. The second output is programmed to output between 1.0 V for an AFR of 10 (gasoline) and 2.0V for an AFR of 20.

From LC-1 Manual:
As factory programmed the first output simulates a typical narrow band oxygen sensor. The second output is programmed to output between 0 V for an AFR of 7.35 (gasoline) and 5.0V for an AFR of 22.39. Other curves of course are easily programmable

From sae_generic:
# Innovate LM-1 WBO2
# ========================
*CLC-00-928
V 0.0 5.0 .1 "{EXT.AD1}"
AFR 10.0 30.0 .1 "{EXT.AD1}*10"
*CLC-00-929
factor 0.0 2.0 .1 "{CALC.AFR_LM11.AFR}/{GM.AFR}"
*CLC-00-930
V 0.0 5.0 .1 "{EXT.AD2}"
AFR 10.0 30.0 .1 "{EXT.AD2}*10"
*CLC-00-931
factor 0.0 2.0 .1 "{CALC.AFR_LM12.AFR}/{GM.AFR}"

# Innovate LC-1 WBO2
# ========================
*CLC-00-932
V 0.0 5.0 .1 "{EXT.AD1}"
AFR 10.0 20.0 .2 "({EXT.AD1}*3)+7.35"
*CLC-00-933
factor 0.0 2.0 .1 "{CALC.AFR_LC11.AFR}/{GM.AFR}"

*CLC-00-934
V 0.0 5.0 .1 "{EXT.AD2}"
AFR 10.0 20.0 .2 "({EXT.AD2}*3)+7.35"
*CLC-00-935
factor 0.0 2.0 .1 "{CALC.AFR_LC12.AFR}/{GM.AFR}"

Okay so the programming end of the LM-2 and LC-1 look identical. And the "factor" in sae_generic look identical. So how is it that using the CALC_LC1n pid will make a difference ?

Are these the correct values to program the LM-2 output?:
0V = 7.35 AFR
5V = 22.39 AFR

5.7ute - FWIW,I'm only using 1 WBO2.

[5.7ute]

Not having an Lm-2 I assumed it would have been set the same as the LM-1.(Once again that assumption was wrong)
Going from the outputs you posted, out of the box you just need to use the LC-1 pids and analogue output 1.
I also have analog output 2 to deliver a flatline voltage of 2.5 to use in a calc pid to remove ground offset variations, this will also ensure you are logging the correct EXT.ADn pid.

Being post 666 there was sure to be something wrong.

[mr.prick]

The LM2 appears to be the same as the LC1,
use the LC1 PIDs with the LM2 factory settings,
and you can use BEN_LC11.
Otherwise program the out to what ever and define your own PIDs.

[joecar]

Don't edit sae_generic.txt... it will be replaced each time software is updated.

Instead, edit calc_pids.txt.

[twadam]

Being post 666 there was sure to be something wrong.

LOL ! Thanks for your help


The LM2 appears to be the same as the LC1,
use the LC1 PIDs with the LM2 factory settings,
and you can use BEN_LC11.
Otherwise program the out to what ever and define your own PIDs.

I think this is what I'll try first, it makes the most sense as of now.


Don't edit sae_generic.txt... it will be replaced each time software is updated.

Instead, edit calc_pids.txt.

Thanks for the tip !

[twadam]

I ended up turning on PIDS for other Wideband controller brands/models and found that the PLX PIDS worked well for the LM-2 device.