How to use the diesel cycle efficiency calculator
Find the ideal efficiency of a diesel engine from its compression and cut-off ratios. Enter compression ratio, cut-off ratio, heat capacity ratio in the fields above; the ideal diesel efficiency is computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “diesel engine efficiency”, “diesel cycle”, “cut-off ratio efficiency”, “calculate diesel cycle efficiency”, “find ideal diesel efficiency”.
Formula
Variables
- r — Compression ratio
- rc — Cut-off ratio
- gam — Heat capacity ratio
Worked example
With compression ratio = 18, cut-off ratio = 2.2, heat capacity ratio = 1.4, the calculator gives ideal diesel efficiency ≈ 62.24165 %.
Frequently asked questions
What is the diesel cycle efficiency calculator used for?
Find the ideal efficiency of a diesel engine from its compression and cut-off ratios. It helps with questions such as “diesel engine efficiency”, “diesel cycle”, “cut-off ratio efficiency”.
What is the formula for the diesel cycle efficiency calculation?
Ideal Diesel efficiency (%) = 100 × (1-(1 / r^(gam-1)) × (rc^gam-1) / (gam × (rc-1))). Here r is compression ratio, rc is cut-off ratio, gam is heat capacity ratio.
What inputs do I need for the diesel cycle efficiency calculator?
You need compression ratio, cut-off ratio, heat capacity ratio. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the diesel cycle efficiency calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the diesel cycle efficiency result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.