Diesel Cycle Calculator
Compute ideal Diesel cycle efficiency from compression and cutoff ratios.
Input Data
Compression Ratio
Cutoff Ratio
Heat Capacity Ratio
Results
Diesel cycle efficiency.
0.63157753
In percent.
63.157753%
T₂/T₁ = r_c^(γ−1).
3.177672
T₃/T₂ = ρ^(γ−1).
2
At a glance:η = 1 − (1/r_c^(γ−1))·((ρ^γ−1)/(γ(ρ−1))). Complements otto-cycle and brayton-cycle.
Formula
η = 1 − (1/r_c^(γ−1))·((ρ^γ−1)/(γ(ρ−1)).
$$\eta = 1 - \frac{1}{r^{\gamma-1}} \cdot \frac{r_c^{\gamma} - 1}{\gamma(r_c - 1)}$$$$T_2/T_1 = r^{\gamma-1}, \quad T_3/T_2 = r_c$$How to Use
- Enter compression ratio, cutoff ratio and γ.
- The tool returns efficiency and temp ratios.
Case Studies
r_c=18, ρ=2, γ=1.4
η ≈ 0.63.
FAQ
vs Otto?
Diesel has constant-pressure heat addition; efficiency differs at same r_c.
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References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.