Diesel Cycle Calculator
Calculate Diesel cycle thermal efficiency from compression ratio, cutoff ratio, and specific heat ratio
Diesel Cycle Calculator
η = 1 − (r_c^γ − 1) / (γ · r^(γ-1) · (r_c − 1))
Diesel: 14–25
V₃/V₂, typical 1.5–4
Thermal Efficiency
63.16%
η = 0.6316
State Points
| State | T (K) | P (kPa) |
|---|---|---|
| 1 (BDC, start) | 300.0 | 100.0 |
| 2 (TDC, compressed) | 953.3 | 5719.8 |
| 3 (end of injection) | 1906.6 | 5719.8 |
| 4 (BDC, expanded) | 791.7 | 263.9 |
Energy Summary (kJ/kg)
q_in
958.0
W_net
605.0
q_out
352.9
Comparison with Otto (same r)
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Diesel Cycle Calculator. Most fields include unit selectors so you can work in your preferred unit system.
Review your inputs
Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors.
Read the results
The Diesel Cycle Calculator instantly computes the output and displays results with units. All calculations happen in your browser — no loading time and no data sent to a server.
Formula Reference
Diesel Cycle Calculator Formula
See calculator inputs for the governing equation
Variables: All variables and their units are labeled in the calculator interface above.
When to Use This Calculator
- •Use the Diesel Cycle Calculator when solving homework or exam problems that require quick numerical verification of your hand calculations.
- •Use it during the design phase to rapidly iterate on parameters before running detailed finite element simulations.
- •Use it when reviewing a colleague's calculation or checking a vendor's data sheet for plausibility.
- •Use it to generate reference data for a technical report or presentation without manual computation.
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