This document describes three common engine cycles: 1) The Otto cycle used in cars and airplanes, which involves adiabatic expansion, adiabatic compression, and isochoric expansion. 2) The Diesel cycle used in generators, trucks, buses and cars, which involves isobaric, adiabatic, and isochoric processes. 3) The Rankine cycle used in steam engines, which involves adiabatic expansion, isochoric compression, adiabatic compression, and isochoric expansion.

1. ENGINE CYCLE ( SIKLUS MESIN)
1. SIKLUS OTTO ( Mobil dan pesawat terbang)
P
a a-b = expansi adiabatic
P1 b-c = kompresi adiabatic
c-a = expansi isokhoric
P3
P2 c b
V1 V2 V

2. 2. SIKLUS DIESEL ( Generator,truk,bus,mobil)
P a a-b = isobaric proses
P1 a b b-c = adiabatic proses
c-d = isokhoric proses
d-a = adiabatic proses
P2 c
P3 d
V1 V2 V3 V

3. 3. SIKLUS RANKINE ( Mesin uap)
P a-b = adiabatic proses ( exp)
P1 a b-c = isokhoric proses(komp)
c-d = adiabatic proses(komp)
P4 d d-a = isokhoric proses(exp)
P2 b
P3 c
V 1 V2 V