O2 sensor voltage range to AFR's??
#1
Three Wheelin'
Thread Starter
O2 sensor voltage range to AFR's??
How can I find out what the range of voltage for an O2 sensor sends out based on AFR's? Can this be done?
Meaning if there is:
10 AFR's = 0.000v
20 AFR's = 5.000v
I can't find any data on this and the tech sheets from my WB doesn't have this info.
Meaning if there is:
10 AFR's = 0.000v
20 AFR's = 5.000v
I can't find any data on this and the tech sheets from my WB doesn't have this info.
#3
Three Wheelin'
Thread Starter
using an Autometer listed here, v-out from the gauge to the ecu/controller. http://www.autometer.com/cat_gaugede...id=3604&sid=11
#5
Three Wheelin'
Thread Starter
mmmm... 0-4v data output feed for ecu / 10:1 to 20:1 AFR range of gauge.
I'm assuming then, just for sake of simple equations, at 10:1 = 0v and at 20:1 = 4v
I'm assuming then, just for sake of simple equations, at 10:1 = 0v and at 20:1 = 4v
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#8
Burning Brakes
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2.5X(0v)+10=10AFR
2.5X(1V)+10=12.5AFR
2.5X(4V)+10=20AFR
if you plug the different values from the range(V) and you plot them you get the Voltage and corresponding AFR.
#9
your voltage range was 0-4v so 4
your AFR range was 10-20:1 so 10
So your AFR/Voltage ratio is 2.5. so you use this value to multiply your voltage readings by and you have to add 10 because your starting value for the AFR is 10:1.
If you look at the units you have AFR/V * V(reading on meter) + AFR(the 10 units you add) = AFR
#10
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These guys have the idea. The 2.5 is the slope of the line, the 10 is the offset.
So, just as they said, take the voltage from the WBO2 multiply by 2.5 then add 10 - that will give you the AFR.
So, just as they said, take the voltage from the WBO2 multiply by 2.5 then add 10 - that will give you the AFR.