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I have been trying to calculate some exhaust flow rates for a while, and I am having some issues here. I was wondering if anyone could provide any insight.

I am making a few assumptions for this calculation. I am assuming no fuel or air is lost through blow by gasses into the crank case or through valve leakage. I am also assuming perfect stoichiometry. In other words...

Mass in = Mass out

All the fuel is burned in a perfect ratio of reactants

I know the mass of the products entering the engine through fuel consumption measurements, and stoichiometry assumptions.

Since I know the mass of my exhaust gasses all I need to do is determine the density of my exhaust gasses to find the volume.

What I know -Temperature

-Chemical composition

-Pressure

-Mass

What I need to know

-Volume

Any tips? I want to use the ideal gas law, but I don't know if this would be an appropriate application of it.

Thanks!

-Dave