Efficiency of Otto Cycle

Efficiency of Otto Cycle Points : Efficiency of Otto Cycle, Ideal Otto Cycle Otto cycle consists of four non-flow process as in pressure-volume (P-V) diagram and temperature-entropy (T-S). Compression and expansion processes are implicit to be (no heat transfer) and reversible, and therefore, isentropic.

The process are as follow:
1—2 Isentropic compression of air during a volume ratio _v1/v2, compression ratio, _rc
2—3 Addition of heat Q_2-3 at stable volume.
3—4 Isentropic expansion of air to original volume.
4—1 Rejection of heat Q_4-1 at stable volume to complete cycle.