File talk:DieselCycle PV.svg
I found this graph difficult to interpret because it lacks the PV curves for the Admission and Exhaust strokes of the piston which would equate to a nearly horizontal line at point 1 where the piston goes up again (reducing volume) exhausting gas and then down again (increasing volume) admitting air. I cite this link for a better understanding: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/diesel.html
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