Brake Mean Effective Pressure from engine power, displacement, and speed - the primary engine-load benchmark.
Formula
$$ BMEP = \frac{P \cdot 60}{V_d \cdot n \cdot z} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $V_d$ | Swept displacement | m³ | engine spec |
| $n$ | rpm | rpm | tachometer |
| $z$ | Strokes per cycle | - | 2-stroke 1, 4-stroke 0.5 |
Sources
- Heywood - Internal Combustion Engines.