EngiRef / Thermodynamics Engineering Formula
Otto Cycle Efficiency
Otto Cycle Efficiency: Thermal efficiency of ideal Otto cycle. A Cycles formula in thermodynamics engineering. Variables η, r and γ, each with SI and imperial…
Cycles
Specification
- Name
- Otto Cycle Efficiency
- Discipline
- thermodynamics
- Category
- Cycles
- LaTeX
- \eta = 1 - \frac{1}{r^{\gamma-1}}
- Description
- Thermal efficiency of ideal Otto cycle
- Conditions
- Ideal spark-ignition engine cycle
- Can solve for
- η, r
- Tags
- otto, cycle, efficiency, compression, engine
Variables
| Symbol | Name | Unit | Si Unit |
|---|---|---|---|
| η | Efficiency | - | - |
| r | Compression Ratio | - | - |
| γ | Specific Heat Ratio | - | - |
Common questions
- What is the Otto Cycle Efficiency formula?
- Thermal efficiency of ideal Otto cycle. It sits under Cycles, Thermo engineering in the EngiRef reference.
- What do the symbols in the Otto Cycle Efficiency formula mean?
- In Otto Cycle Efficiency, η is efficiency; r is compression ratio; γ is specific heat ratio.
- When does the Otto Cycle Efficiency formula apply?
- Otto Cycle Efficiency holds under this condition: Ideal spark-ignition engine cycle.