How to calculate frequency in diesel engine?

To calculate the frequency in a diesel engine, you need to determine the engine's RPM (revolutions per minute) and the number of power strokes per revolution. The frequency can be calculated using the formula: Frequency (Hz) = (RPM × Number of Power Strokes) / 60. For a four-stroke engine, the number of power strokes is typically 1 per 2 revolutions, while for a two-stroke engine, it is 1 per revolution. Adjust the formula accordingly based on the engine type.