Tzion_ben_Arthur

iTrader: (19)

Here is the quick, I have had a long day and I cant sort this out.

efilive, cos3, e85, turbo car, 3bar, AEM wb. Commanded AFR in Lambda.

I need to auto VE and record in scan tool in lambda. Am I missing something? Honestly I do not know where to start. I have been using AFR for so long that I am now lost. I also need to configure scan to read a 0-5v wb (10 - 20). I know this must be simple....

SSpdDmon

iTrader: (10)

http://forum.efilive.com/showthread....ghlight=lambda

shoemike

iTrader: (25)

B3601 is value is used by the PCM to determine the AFR of EQ ratio 1.0 (Lambda1)

{B3601}/AFR=EQ1
AFR/{B3601}=Lambda

SSpdDmon

iTrader: (10)

That assumes you know the exact content of the fuel in your gas tank and it's respective stoich AFR. Just because a pump says "E85" on the side doesn't mean that's what you're getting.

http://www.e85mustangs.com/regions123.html

shoemike

iTrader: (25)

That's why I didn't give an AFR value.
With the Fbody OS' it is on the individual to figure out what is in the tank
and set {B3601} accordingly.

Tzion_ben_Arthur

iTrader: (19)

Thanks Guys... I have the B3601 set, as a mater of fact my tune is pretty good. I just don't want to see AFR in the scan tool anymore. I want to use commanded Lamda; I want to log Lambda, and when I start auto VE using Lambda. I want to make sure the system is receiving the correct info so my BEN Factors are correct. I guess I really don't even need to mention E85 do I... The real question is how do set up the WB in scan and the VE maps to use Lambda.

Thanks Speed Demon for the site, I will give it a look.

SSpdDmon

iTrader: (10)

The answer is in the 1st link I posted.

If you program your WBO2 as follows:
0v = 0.74074 (lambda) = 1.35 (EQ)
5v = 1.1765 (lambda) = 0.85 (EQ)

...the formula for EQ is:
(-0.0008*({EXT.AD1}+1)*({EXT.AD1}+1)*({EXT.AD1}+1))+ (0.0179*({EXT.AD1}+1)*({EXT.AD1}+1))-(0.1895*({EXT.AD1}+1))+1.5223

...the formula for lambda is "1/EQ" (substitute formula above).


Making a PID with this formula means that no matter what type of fuel is in the tank, you should have an accurate understanding of what the sensor recognizes as stoich.

Tzion_ben_Arthur

iTrader: (19)

You the man.... I was very impressed with your understanding as it was apparent in the link you listed - all 16+ pages. I read this at work and printed your responses for my cheat folder. This helped a lot. I only wish I had more of an understanding of PIDs and the background language.

Thanks Much

SSpdDmon

iTrader: (10)

http://forum.efilive.com/showthread.php?t=132

SSpdDmon

iTrader: (10)

EQ=(-0.00004*(({EXT.AD1}/0.25)+1)*(({EXT.AD1}/0.25)+1)*(({EXT.AD1}/0.25)+1))+(0.0026*(({EXT.AD1}/0.25)+1)*(({EXT.AD1}/0.25)+1))-(0.0743*(({EXT.AD1}/0.25)+1))+1.53

As requested, that's the equation I came up with that will work with your AEM unit. You just need to validate what the sensor is capable of reading.

locospl

iTrader: (3)

Bump so I can find this tomorrow