Number of Inlet Valve Openings per Minute = (RPM * Number of Cylinders) / 2
Assuming a typical 6-cylinder engine with an RPM of 2000:
Number of Inlet Valve Openings per Minute = (2000 * 6) / 2 = 6000
Therefore, in a 6-cylinder engine operating at 2000 RPM, each inlet valve opens 6000 times per minute.