2wd

Hi...does anyone have a clue how to translate afr numbers to Lambda number and Co % numbers....??

Please help..

Chip

iTrader: (3)

Its not possible to do an exact translation from lambda to CO as lamda encompasses CO/CO2/O2 all in its calculation, so you can end up with a different lamba reading for the same amount of CO or vice versa.

Billabong

14.7:1 AFR = Lambda 1.00

Some more detailed info here: http://www.byui.edu/Automotive/Lambda.pdf

2wd

..... thanks..but it seems complicated ....

the thing is that I have a AFR gauge in the car, and I would like to see what the different AFR readings is in lambda numbers ....

2001ode

iTrader: (1)

Hi,

CO ratio AFR





Regards.

Claude

2wd

thanks......

Yura

I think this diagram is a particular case. For example at idle my cos have 14.7-15afr and CO is 2.4-2.6%

2001ode

iTrader: (1)

Hi Yura,

May be your AFR is not right.

Regards.

Claude

2wd

?????

Yura

Hi! I use innovate XD-16 kit - one of the best afr device
I think the presence of the cat have effect too, i haven't it.

mappindude

Yura is correct i think. cats =lower total CO %

2wd

Hmmm... .... but there must be some way to directly take a AFR number and convert it to either lambda or Co%.....hopfully

Anyone ???

2wd

uppp

the original

as already said above by a few people you can relate an AFR to lambda (although there are different types of lambda using different calculations, try googling brettschneider and spindt)
but not to CO, as you can raise CO, with a corresponding decrease in CO2 but have the same lambda ( and therefore AFR)

hope that makes sense

my tech edge display has a jumper that can be set to give either AFR or lambda depending what's required, I prefer lambda now

foreigneRS

am i right in thinking that things like combustion temperature can affect CO without a change in lambda/AFR?

2wd

Hmmm...ok...I run the Dynojet Wideband Commander and I only get the AFR numbers, and I'm trying to figure out witch numbers are ok when driving "normal" ... at boost and at idle.....and witch are not ok...

sygjim

iTrader: (1)

interesting post

so, you cant set the co with a afr gauge, i though that it was possible, but i was wrong...

SS1

iTrader: (3)

took me ages to find this fucking search is so shonky

hope it helps you Dynojet Wideband Commander ...

https://passionford.com/forum/viewtopic.php?t=163279

Chip

iTrader: (3)

NO

But you can set the fuelling, which means if all else is working ok the CO will be fine too.


But its possible to have different CO values and the same AFR value, or vice versa.

sygjim

iTrader: (1)

do you if there is method to set the co at a know value without any co controler (like number of turn on the ecu screw, ...)?