constant temperature

constant volume

constant pressure

constant enthalpy

60.32%

56.47%

52.86%

61.42%

constant temperature

constant volume

polytropically

constant pressure

$1-\frac{1}{{\gamma }^{r^{\gamma -1}}} \left[\frac{{\rho }^{\gamma } -1}{\rho - 1}\right]$

$1-\frac{1}{r^{\mathrm{\gamma }-1}}\left[\frac{{\mathrm{\rho }}^{\mathrm{\gamma }}-1}{\mathrm{\rho }-1}\right]$

$1-\frac{1}{{\gamma }^{r^{\gamma -1}}} \left[\frac{{\rho }^{\gamma } +1}{\rho - 1}\right]$

$1-\frac{1}{r^{\mathrm{\gamma }-1}}$

${\eta }_{Diesel }> {\eta }_{Dual} > {\eta }_{Otto}$

${\eta }_{Diesel }< {\eta }_{Dual} < {\eta }_{Otto}$

${\eta }_{Dual}> {\eta }_{Diesel} > {\eta }_{Otto}$

${\eta }_{Dual}< {\eta }_{Diesel} < {\eta }_{Otto}$

ratio of brake power to indicated power

ratio of heat supplied by the fuel to the power delivered by the engine

ratio of power delivered by the engine to heat supplied by the fuel

all of these

ratio of indicated thermal efficiency of engine to air standard efficiency

ratio of brake power to indicated power

ratio of air standard efficiency to thermal efficiency of engine

all of these