Main Question or Discussion Point
I have a P-V trace for a wide open throttle and a part load. Is it possible to calculate the BMEP from these graphs?
If you have no better software than Excel, you can use a trapezoidal numerical integration approach reasonably well so long as the x-interval is pretty small compared to the sample length.Integrating real curves is a *****, either find a program that can make approximate curves from a set of data points or break out the graph paper.
Actually, if you used the average pressure between two datapoints then you used the trapezoid rule! :)Those are two marvellous suggestions. I feel especially silly about the numerical integration in excel as that is probably the easiest way to do it, I should have known that but never even thought to use the trapezoid rule. :(