Indicator Diagram
A plot of pressure vs. volume. This is a graphical representation of the changing relationship between pressure and volume in the cylinder during engine cycles.
Also, known as a PV diagram.
Lines or curves on the indicator diagram represent processes. The areas under curves on the indicator diagram are equal to the work released by the process.
A PV curve or diagram shows the impact of early or late ignition timing on peak cylinder pressure.
See also: Pressure, Volume, Work.
Subjects: Chemistry Mechanical Engineering Physics