The formula to calculate Diesel Efficiency is:
\[ \text{DE} = 1 - \frac{1}{r^{\gamma - 1}} \left( \frac{Cr^{\gamma - 1}}{\gamma (Cr - 1)} \right) \]
Diesel efficiency is a measure of the combustion process of a reciprocating internal combustion engine. The Compression Ratio is the ratio between the volume of the cylinder and the combustion chamber. Gamma is the ratio of heat capacities at constant pressure and volume. The Cutoff Ratio is the ratio of the final to the initial volume.
Let's assume the following values:
Using the formula:
\[ \text{DE} = 1 - \frac{1}{1.75^{2.6 - 1}} \left( \frac{1.2^{2.6 - 1}}{2.6 (1.2 - 1)} \right) \approx 1.09639616031208 \]
The Diesel Efficiency is approximately 1.09639616031208.
| Compression Ratio | Diesel Efficiency |
|---|---|
| 1.5 | -0.345676398699419 |
| 1.6 | -0.213653402525937 |
| 1.7 | -0.101459101312263 |
| 1.8 | -0.005195745747584 |
| 1.9 | 0.078106212129622 |