two isothermals and two isentropics

two isentropics and two constant volumes

two isentropics, one constant volume and one constant pressure

two isentropics and two constant pressures

working substance

design of engine

size of engine

temperatures of source and sink.

Otto cycle is more efficient than Diesel cycle

Diesel cycle is more efficient than Otto cycle

efficiency depends on other factors

both Otto and Diesel cycles are equally efficient

gas engine

reversible engine

petrol engine

steam engine

a reversible cycle (ft)

an irreversible cycle

a semi-reversible cycle

a quasi static cycle