Otto Cycle Heat Added Calculator

Heat added during combustion process (Q_in):

Mass of the working fluid (m):

Specific heat at constant volume (C_v):

Temperature at the end of the compression stroke (T₂):

Temperature after combustion (T₃):

How This Is Calculated

$$ Q_{in} = m C_v (T_3 - T_2) $$ where:

Q_in = Heat added during combustion process (J)

m = Mass of the working fluid (air-fuel mixture) (kg)

C_v = Specific heat at constant volume (J/kg K)

T₂ = Temperature at the end of the compression stroke (K)

T₃ = Temperature after combustion (K)

Assumptions

The working fluid behaves as an ideal gas.
Specific heats remain constant.
Compression and expansion processes are adiabatic.
There is perfect mixing of the air and fuel.

Related Calculators

Otto Cycle Compression Ratio

Otto Cycle Efficiency

Otto Cycle Heat Rejected (Exhaust Process)

Otto Cycle Pressure

Otto Cycle Temperature