1001001
Well Known Member
I'm not 100% sure this belongs here but is a fuel related question...
Is anyone aware of a general chart or formula showing EGT vs actual stoichiometric air to fuel ratio in internal combustion engines? I am attempting some calculations about theoretical fuel burn and keep coming up with less fuel flow than expected for a given MAP.
My assumptions are that at a given MAP, the combustion chamber fills with ambient air and that the fuel metering device, be it a carburetor or fuel injection system, is in turn metering Fuel in based on the air flow. It seems that if I use the MAP as the basis for calculating the molar composition of the precombustion mixture, I get lower fuel flows than expected at a given engine speed.
I know that I could calculate this by playing around with adiabatic flame temperatures in the combustion chamber but quite frankly I am not trying to write an undergraduate engineering thesis, just understand the relationship of fuel:air mixture to EGT a little better.
Anyone know when we talk about peak EGT, just how close that is to the actual stoichiometric air requirement?
Is anyone aware of a general chart or formula showing EGT vs actual stoichiometric air to fuel ratio in internal combustion engines? I am attempting some calculations about theoretical fuel burn and keep coming up with less fuel flow than expected for a given MAP.
My assumptions are that at a given MAP, the combustion chamber fills with ambient air and that the fuel metering device, be it a carburetor or fuel injection system, is in turn metering Fuel in based on the air flow. It seems that if I use the MAP as the basis for calculating the molar composition of the precombustion mixture, I get lower fuel flows than expected at a given engine speed.
I know that I could calculate this by playing around with adiabatic flame temperatures in the combustion chamber but quite frankly I am not trying to write an undergraduate engineering thesis, just understand the relationship of fuel:air mixture to EGT a little better.
Anyone know when we talk about peak EGT, just how close that is to the actual stoichiometric air requirement?