looking for Spindt AFR calculation
looking for Spindt AFR calculation
(OP)
Can anyone provide the equation for calculating air fuel ratio based on exhaust gas emissions (CO, CO2, HC, and O2)?
Thanks much.
Thanks much.
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looking for Spindt AFR calculation
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RE: looking for Spindt AFR calculation
Mike
RE: looking for Spindt AFR calculation
I tackled this some months ago, there's a little bit on it in Heywood, I'll see if I can dig something up tommorow- if I don't get back to you, it's because I'm either too busy, or can't find the equations *L*
RE: looking for Spindt AFR calculation
Function spindtAFR(O2percent, COpercent, CO2percent, HCppmC, HCratio)
O2 = O2percent
CO2 = CO2percent
CO = COpercent
HC = HCppmC
q = O2 / CO2
r = CO / CO2
Fb = (CO2 + CO) / (CO2 + CO + (0.0001 * HC))
Fc = 12.01 / (12.01 + 1.008 * HCratio)
spindtAFR = Fb * ((11.492 * Fc * ((1 + 0.5 * r + q) / _
(1 + r))) + ((120 * (1 - Fc)) / (3.5 + r)))
End Function