Quote:
Originally Posted by t vago
So, the piston has to push against an absolute exhaust gas pressure, and then has to suck in against an absolute intake gas pressure.
Using thermodynamic work equation for constant pressure processes, it can be shown that the work consumed is proportional to the difference between the exhaust gas pressure and the intake manifold pressure.
This is true in all cases - rich, lean, stoich, or no fuel at all.
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Agreed. But if you want to evaluate DCD or lean-burn relative effects have to be considered now.