BMEP (Brake Mean Effective Pressure)

Brake Mean Effective Pressure (BMEP) is a measure of an engine's efficiency, indicating the average pressure produced in the cylinders during combustion that contributes to generating power. It’s calculated by dividing the engine’s brake (output) power by its displacement volume (total size of all cylinders), offering a standardized way to compare engine performance regardless of size. Essentially, BMEP reflects how effectively an engine converts fuel into useful work, with higher values representing more efficient engines capable of producing more power for their size. It's a useful metric for engineers to assess and compare engine performance objectively.