Maximum Thermal Efficiency of an Otto Cycle

The Maximum Thermal Efficiency of an Otto Cycle is the thermal efficiency of an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine. It is thermodynamic cycle most commonly found in automobile engines. It is a description of what happens to a mass of gas as it is subjected to changes of pressure, temperature, volume, addition of heat, and removal of heat.
The following formula is used to calculate the thermal efficiency: `eta=1-(1/r^(gamma-1))`, where:

• `r` = compression ratio
• `gamma` = specific heat ratio

References

Wikipedia (https://en.wikipedia.org/wiki/Otto_cycle)