The formula to calculate the cranking pressure (CP) is:
\[ CP = (BD^2 \times SL \times CN \times 0.7854) \]
Where:
Cranking pressure is the pressure generated inside an engine’s cylinders when the engine is being cranked by the starter motor before it starts running. It is an important parameter for diagnosing engine health and performance. Higher cranking pressures generally indicate good sealing and compression within the engine’s cylinders, which is critical for efficient engine operation.
Let's consider an example:
Using the formula to calculate Cranking Pressure:
\[ CP = (4^2 \times 3.5 \times 6 \times 0.7854) = 263.9 \, \text{PSI} \]
This means that the cranking pressure for the given example is approximately 263.9 PSI.
